Project Manual
for
Porsche of North Houston
Houston, Texas
owner:
Indigo Auto Group /
Cobalt Development
architect:
Praxis3 Architecture Corp
100 Peachtree St. NW
Suite 1450
Atlanta, GA 30303
(404) 875-4500
Project No. 15155
Date: November 24, 2015
For Permit
Copyright © 2015 – Praxis3 Architecture Corp
All reports, plans, specifications, computer files, field data, notes and other documents and
instruments prepared by Praxis3 Architecture Corp shall remain the property of Praxis3 Architecture
Corp. Praxis3 Architecture Corp shall retain all common law, statutory and other reserved rights
including copyright thereto.
This project manual and the associated drawings are not to be reproduced or copied in whole or in
part. They are only to be used for the project and sites specifically identified herein and are not to be
used on any other project unless approved in writing by Praxis3 Architecture Corp.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
00 0002-1
TABLE OF CONTENTS
NOVEMBER 24, 2015
For Permit
11-24-2015
SPECIFICATION INDEX
SPEC NUMBER
SPECIFICATION NAME
DIVISION 1
01 2100
01 3000
01 3001
01 3002
01 4000
01 4150
01 5000
01 6000
01 7000
01 7419
01 7800
GENERAL REQUIREMENTS
Allowances
Administrative Requirements
Responsibility Chart
Submittal Cover Sheet
Quality Requirements
Special Inspections
Temporary Facilities and Controls
Product Requirements
Execution and Closeout Requirements
Construction Waste Management & Disposal
Closeout Submittals
O
O
O
O
O
O
O
O
O
O
O
DIVISION 3
03 0505
03 3000
03 3511.14
CONCRETE
Underslab Vapor Barrier
Cast-in-Place Concrete
Concrete Floor Finishes
O
O
O
DIVISION 4
04 2000
MASONRY
Concrete Unit Masonry
O
DIVISION 5
05 1200
05 1243
05 2100
05 3100
05 4000
05 5000
05 5100
05 7310
METALS
Structural Steel
Architecturally Exposed Structural Steel
Steel Joists Girders
Steel Deck
Cold-Formed Steel Framing
Metal Fabrications
Metal Stairs
Frameless Windscreen System Tempered Glass
Assemblies
DIVISION 6
06 1000
06 4100
WOOD, PLASTICS, AND COMPOSITES
Rough Carpentry
Architectural Wood Casework
O
O
DIVISION 7
07 1616
07 2100
THERMAL AND MOISTURE PROTECTION
Crystalline Waterproofing
Thermal Insulation
O
O
O
O
O
O
O
O
O
O
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PRAXIS3 ARCHITECTURE CORP-15155
00 0002-2
TABLE OF CONTENTS
NOVEMBER 24, 2015
07 2110
07 2119
07 2500
07 4113
07 4213
07 4264
07 5423.10
07 6200
07 7100
07 7200
07 8400
07 9005
Board & Batt Insulation Climate Zone Table
Foamed-in-Place Insulation
Weather Barrier
Metal Roof Panels
Metal Wall Panels
Metal Composite Material Wall Panels
TPO Roofing System - 60 mil
Sheet Metal Flashing and Trim
Roof Specialties
Roof Accessories
Firestopping
Joint Sealers
O
O
O
O
O
O
O
O
O
O
O
O
DIVISION 8
08 1113
08 3013
08 3100
08 3323
08 4126
08 4227
08 4229
08 4313
08 4413
08 4426
08 6200
08 7100
08 8000
08 8300
OPENINGS
Hollow Metal Doors and Frames
High Speed Roll-Up Door
Access Doors and Panels
Overhead Coiling Doors
All Glass Entrances and Storefronts
Frameless Sliding Glass Doors
Automatic Entrances
Aluminum-Framed Storefronts
Glazed Aluminum Curtain Walls
Structural Glass Curtain Walls
Unit Skylights
Door Hardware
Glazing
Mirrors
O
O
O
O
O
O
O
O
O
O
O
O
O
O
DIVISION 9
09 2116
09 3000
09 3501
09 5100
09 5423
09 6500
09 6800
09 6813
09 9000
09 9110
09 9600
FINISHES
Gypsum Board Assemblies
Tiling
Vibrated Heavy Duty Tiling
Acoustical Ceilings
Linear Metal Ceilings
Resilient Flooring
Carpeting
Tile Carpeting
Painting and Coating
Paint Schedule
High-Performance Coatings
O
O
O
O
O
O
O
O
O
O
O
DIVISION 10
10 1101
10 1400
10 2113.13
SPECIALTIES
Visual Display Boards
Signage
Metal Toilet Compartments
O
O
O
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PRAXIS3 ARCHITECTURE CORP-15155
00 0002-3
TABLE OF CONTENTS
NOVEMBER 24, 2015
10 2800
10 4400
10 5100
10 7326
Toilet, Bath and Laundry Accessories
Fire Protection Specialties
Lockers
Aluminum Walkway Covers
O
O
O
O
DIVISION 11
11 3100
11 5213
EQUIPMENT
Residential Appliances
Projection Screens
O
O
DIVISION 12
12 2113
12 4813
FURNISHINGS
Horizontal Louver Blinds
Entrance Floor Mats and Frames
O
O
DIVISION 14
14 2010
CONVEYING EQUIPMENT
Passenger Elevators
O
DIVISION 22
22 0500
22 0519
22 0523
22 0529
22 0553
22 0700
22 1116
22 1119
22 1123
22 1316
22 1319
22 1323
22 1413
22 1423
22 3300
22 4000
PLUMBING
Basic Materials and Methods
Meters and Gages for Plumbing Piping
General-Duty Valves for Plumbing Piping
Hangers and Supports for Plumbing Piping Equipment
Identification For Plumbing Piping and Equipment
Plumbing Insulation
Domestic Water Piping
Domestic Water Piping Specialties
Domestic Water Pumps
Sanitary Waste and Vent Piping
Sanitary Waste Piping Specialties
Sanitary Waste Interceptors
Facility Storm Drainage Piping
Storm Drainage Piping Specialties
Electric Domestic Water Heaters
Plumbing Fixtures
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DIVISION 23
23 0513
23 0529
23 0548
23 0553
23 0593
23 0700
23 1115
23 2300
23 3113
23 3116
23 3300
MECHANICAL
Common Motor Requirements for HVAC Equipment
Hangers and Supports for HVAC Piping and Equipment
Vibration Control for HVAC Piping and Equipment
Identification for HVAC Piping and Equipment
Testing, Adjusting, and Balancing for HVAC
HVAC Insulation
Fuel Gas Systems
Refrigerant Piping
Metal Ducts
Nonmetal Ducts
Air Duct Accessories
0
0
0
0
0
0
0
0
0
0
0
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PRAXIS3 ARCHITECTURE CORP-15155
00 0002-4
TABLE OF CONTENTS
NOVEMBER 24, 2015
23 3423
23 3713
23 7413
HVAC Power Ventilators
Diffusers, Registers, and Grilles
Packaged Outdoor Central-Station Air Handling Units
0
0
0
DIVISION 26
26 0500
26 0501
26 0502
26 0519
26 0526
26 0533
26 0534
26 0535
26 0923
26 0926
26 2200
26 2413
26 2416
26 2726
26 2816
26 4113
26 4313
26 5100
ELECTRICAL
General Provisions
Electrical Scope
Basic Electrical Requirements
Low-Voltage Electrical Power Conductors/Cables
Grounding and Bonding for Electrical Systems
Raceway for Electrical Systems
Non-Metallic Raceway for Electrical Systems
Boxes for Electrical Systems
Lighting Occupancy Sensors
Lighting Control Panels
Low Voltage Transformers
Distribution Switchboards
Panelboards
Wiring Devices
Safety Switches
Lightning Protection
Transient Voltage Suppression for Low-Voltage
Lighting Materials and Methods
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DIVISION 27
27 0500
COMMUNICATIONS
Special Systems
0
DIVISION 28
28 3000
ELECTRONIC SAFETY AND SECURITY
Digital, Addressable Fire Alarm Systems
0
DIVISION 31
31 3116
EARTHWORK
Termite Control
O
DIVISION 32
32 0126.74
32 3113
32 3119
EXTERIOR IMPROVEMENTS
Concrete Overlays
Chain Link Fences & Gates
Decorative Metal Fences & Gates
O
O
O
Geotechnical Report
O
APPENDIX A
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230513-1
COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT
NOVEMBER 24, 2015
SECTION 230513 - COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT
PART 1 - GENERAL
1.1
A.
1.2
A.
SUMMARY
Section includes general requirements for single-phase and polyphase, generalpurpose, horizontal, small and medium, squirrel-cage induction motors for use on ac
power systems up to 600 V and installed at equipment manufacturer's factory or
shipped separately by equipment manufacturer for field installation.
COORDINATION
Coordinate features of motors, installed units, and accessory devices to be compatible
with the following:
1.
2.
3.
4.
Motor controllers.
Torque, speed, and horsepower requirements of the load.
Ratings and characteristics of supply circuit and required control sequence.
Ambient and environmental conditions of installation location.
PART 2 - PRODUCTS
2.1
GENERAL MOTOR REQUIREMENTS
A.
Comply with requirements in this Section except when stricter requirements are
specified in HVAC equipment schedules or Sections.
B.
Comply with NEMA MG 1 unless otherwise indicated.
2.2
MOTOR CHARACTERISTICS
A.
Duty: Continuous duty at ambient temperature of 40 deg C and at altitude of 3300 feet
above sea level.
B.
Capacity and Torque Characteristics: Sufficient to start, accelerate, and operate
connected loads at designated speeds, at installed altitude and environment, with
indicated operating sequence, and without exceeding nameplate ratings or considering
service factor.
2.3
A.
POLYPHASE MOTORS
Description: NEMA MG 1, Design B, medium induction motor.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230513-2
COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT
NOVEMBER 24, 2015
B.
Efficiency: Energy efficient, as defined in NEMA MG 1.
C.
Service Factor: 1.15.
D.
Multispeed Motors: Variable torque.
1.
2.
For motors with 2:1 speed ratio, consequent pole, single winding.
For motors with other than 2:1 speed ratio, separate winding for each speed.
E.
Rotor: Random-wound, squirrel cage.
F.
Bearings: Regreasable, shielded, antifriction ball bearings suitable for radial and thrust
loading.
G.
Temperature Rise: Match insulation rating.
H.
Insulation: Class F.
I.
Code Letter Designation:
1.
2.
J.
2.4
Motors 15 HP and Larger: NEMA starting Code F or Code G.
Motors Smaller than 15 HP: Manufacturer's standard starting characteristic.
Enclosure Material: Cast iron for motor frame sizes 324T and larger; rolled steel for
motor frame sizes smaller than 324T.
POLYPHASE MOTORS WITH ADDITIONAL REQUIREMENTS
A.
Motors Used with Reduced-Voltage and Multispeed Controllers: Match wiring
connection requirements for controller with required motor leads. Provide terminals in
motor terminal box, suited to control method.
B.
Motors Used with Variable Frequency Controllers: Ratings, characteristics, and
features coordinated with and approved by controller manufacturer.
1.
2.
3.
4.
2.5
A.
Windings: Copper magnet wire with moisture-resistant insulation varnish,
designed and tested to resist transient spikes, high frequencies, and short time
rise pulses produced by pulse-width modulated inverters.
Energy- and Premium-Efficient Motors: Class B temperature rise; Class F
insulation.
Inverter-Duty Motors: Class F temperature rise; Class H insulation.
Thermal Protection: Comply with NEMA MG 1 requirements for thermally
protected motors.
SINGLE-PHASE MOTORS
Motors larger than 1/20 hp shall be one of the following, to suit starting torque and
requirements of specific motor application:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
230513-3
COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT
NOVEMBER 24, 2015
Permanent-split capacitor.
Split phase.
Capacitor start, inductor run.
Capacitor start, capacitor run.
B.
Multispeed Motors: Variable-torque, permanent-split-capacitor type.
C.
Bearings: Prelubricated, antifriction ball bearings or sleeve bearings suitable for radial
and thrust loading.
D.
Motors 1/20 HP and Smaller: Shaded-pole type.
E.
Thermal Protection: Internal protection to automatically open power supply circuit to
motor when winding temperature exceeds a safe value calibrated to temperature rating
of motor insulation. Thermal-protection device shall automatically reset when motor
temperature returns to normal range.
PART 3 - EXECUTION (Not Applicable)
END OF SECTION 230513
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230529-1
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
SECTION 230529 - HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 1 Specification Sections, apply to this
Section.
SUMMARY
This Section includes the following hangers and supports for HVAC system piping
and equipment:
1.
2.
3.
B.
Related Sections include the following:
1.
2.
1.3
Metal framing systems.
Fastener systems.
Equipment supports.
Division 05 Section "Metal Fabrications" for structural-steel shapes and plates
for trapeze hangers for pipe and equipment supports.
Division 23 Section Metal Ducts for duct hangers and supports.
DEFINITIONS
A.
MSS: Manufacturers Standardization Society for The Valve and Fittings Industry
Inc.
B.
Terminology: As defined in MSS SP-90, "Guidelines on Terminology for Pipe
Hangers and Supports."
1.4
PERFORMANCE REQUIREMENTS
A.
Design supports for multiple pipes, including pipe stands, capable of supporting
combined weight of supported systems and system contents.
B.
Design equipment supports capable of supporting combined operating weight of
supported equipment and connected systems and components.
1.5
A.
SUBMITTALS
Product Data: For the following:
1.
2.
Steel pipe hangers and supports.
Thermal-hanger shield inserts.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
B.
230529-2
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Shop Drawings: Show fabrication and installation details and include calculations
for the following:
1.
2.
3.
Trapeze pipe hangers. Include Product Data for components.
Metal framing systems. Include Product Data for components.
Equipment supports.
PART 2 - PRODUCTS
2.1
A.
MANUFACTURERS
In other Part 2 articles where titles below introduce lists, the following requirements
apply to product selection:
1.
2.2
A.
2.3
Manufacturers: Subject to compliance with requirements, provide products
by one of the manufacturers specified.
TRAPEZE PIPE HANGERS
Description: MSS SP-69, Type 59, shop- or field-fabricated pipe-support assembly
made from structural-steel shapes with MSS SP-58 hanger rods, nuts, saddles, and
U-bolts.
METAL FRAMING SYSTEMS
A.
Description: MFMA-3, shop- or field-fabricated pipe-support assembly made of
steel channels and other components.
B.
Manufacturers:
1.
2.
3.
4.
5.
6.
7.
B-Line Systems, Inc.; a division of Cooper Industries.
ERICO/Michigan Hanger Co.; ERISTRUT Div.
GS Metals Corp.
Power-Strut Div.; Tyco International, Ltd.
Thomas & Betts Corporation.
Tolco Inc.
Unistrut Corp.; Tyco International, Ltd.
C.
Coatings: Manufacturer's standard finish, unless bare metal surfaces are indicated.
D.
Nonmetallic Coatings: Plastic coating, jacket, or liner.
2.4
THERMAL-HANGER SHIELD INSERTS
A.
Description: 100-psig-minimum, compressive-strength insulation insert encased in
sheet metal shield.
B.
Manufacturers:
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PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
5.
6.
230529-3
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Carpenter & Paterson, Inc.
ERICO/Michigan Hanger Co.
PHS Industries, Inc.
Pipe Shields, Inc.
Rilco Manufacturing Company, Inc.
Value Engineered Products, Inc.
C.
Insulation-Insert Material for Cold Piping: ASTM C 552, Type II cellular glass with
vapor barrier.
D.
For Trapeze or Clamped Systems:
circumference of pipe.
E.
For Clevis or Band Hangers: Insert and shield shall cover lower 180 degrees of
pipe.
F.
Insert Length: Extend 2 inches beyond sheet metal shield for piping operating
below ambient air temperature.
2.5
A.
FASTENER SYSTEMS
Powder-Actuated Fasteners: Threaded-steel stud, for use in hardened portland
cement concrete with pull-out, tension, and shear capacities appropriate for
supported loads and building materials where used.
1.
Manufacturers:
a.
b.
c.
d.
e.
B.
Manufacturers:
a.
b.
c.
d.
e.
f.
A.
Hilti, Inc.
ITW Ramset/Red Head.
Masterset Fastening Systems, Inc.
MKT Fastening, LLC.
Powers Fasteners.
Mechanical-Expansion Anchors: Insert-wedge-type stainless steel, for use in
hardened portland cement concrete with pull-out, tension, and shear capacities
appropriate for supported loads and building materials where used.
1.
2.6
Insert and shield shall cover entire
B-Line Systems, Inc.; a division of Cooper Industries.
Empire Industries, Inc.
Hilti, Inc.
ITW Ramset/Red Head.
MKT Fastening, LLC.
Powers Fasteners.
EQUIPMENT SUPPORTS
Description: Welded, shop- or field-fabricated equipment support made from
structural-steel shapes.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.7
230529-4
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
MISCELLANEOUS MATERIALS
A.
Structural Steel:
galvanized.
B.
Grout:
ASTM C 1107, factory-mixed and -packaged, dry, hydraulic-cement,
nonshrink and nonmetallic grout; suitable for interior and exterior applications.
1.
2.
ASTM A 36/A 36M, steel plates, shapes, and bars; black and
Properties: Nonstaining, noncorrosive, and nongaseous.
Design Mix: 5000-psi, 28-day compressive strength.
PART 3 - EXECUTION
3.1
HANGER AND SUPPORT APPLICATIONS
A.
Specific hanger and support requirements are specified in Sections specifying
piping systems and equipment.
B.
Comply with MSS SP-69 for pipe hanger selections and applications that are not
specified in piping system Sections.
C.
Use hangers and supports with galvanized, metallic coatings for piping and
equipment that will not have field-applied finish.
D.
Use nonmetallic coatings on attachments for electrolytic protection where
attachments are in direct contact with copper tubing.
E.
Use padded hangers for piping that is subject to scratching.
F.
Horizontal-Piping Hangers and Supports: Unless otherwise indicated and except
as specified in piping system Sections, install the following types:
1.
2.
3.
4.
5.
G.
Adjustable, Steel Clevis Hangers (MSS Type 1):
For suspension of
noninsulated or insulated stationary pipes, NPS 1/2 to NPS 30.
Carbon- or Alloy-Steel, Double-Bolt Pipe Clamps (MSS Type 3): For
suspension of pipes, NPS 3/4 to NPS 24, requiring clamp flexibility and up to
4 inches of insulation.
Steel Pipe Clamps (MSS Type 4): For suspension of cold and hot pipes,
NPS 1/2 to NPS 24, if little or no insulation is required.
Pipe Hangers (MSS Type 5): For suspension of pipes, NPS 1/2 to NPS 4, to
allow off-center closure for hanger installation before pipe erection.
Clips (MSS Type 26): For support of insulated pipes not subject to expansion
or contraction.
Vertical-Piping Clamps: Unless otherwise indicated and except as specified in
piping system Sections, install the following types:
1.
2.
Extension Pipe or Riser Clamps (MSS Type 8): For support of pipe risers,
NPS 3/4 to NPS 20.
Carbon- or Alloy-Steel Riser Clamps (MSS Type 42): For support of pipe
risers, NPS 3/4 to NPS 20, if longer ends are required for riser clamps.
PORSCHE OF NORTH HOUSTON
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PRAXIS3 ARCHITECTURE CORP-15155
H.
Hanger-Rod Attachments: Unless otherwise indicated and except as specified in
piping system Sections, install the following types:
1.
2.
3.
I.
Steel Turnbuckles (MSS Type 13): For adjustment up to 6 inches for heavy
loads.
Swivel Turnbuckles (MSS Type 15): For use with MSS Type 11, split pipe
rings.
Malleable-Iron Sockets (MSS Type 16): For attaching hanger rods to various
types of building attachments.
Building Attachments: Unless otherwise indicated and except as specified in piping
system Sections, install the following types:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Steel or Malleable Concrete Inserts (MSS Type 18): For upper attachment to
suspend pipe hangers from concrete ceiling.
Top-Beam C-Clamps (MSS Type 19): For use under roof installations with
bar-joist construction to attach to top flange of structural shape.
Side-Beam or Channel Clamps (MSS Type 20): For attaching to bottom
flange of beams, channels, or angles.
Center-Beam Clamps (MSS Type 21): For attaching to center of bottom
flange of beams.
Welded Beam Attachments (MSS Type 22): For attaching to bottom of
beams if loads are considerable and rod sizes are large.
C-Clamps (MSS Type 23): For structural shapes.
Top-Beam Clamps (MSS Type 25): For top of beams if hanger rod is
required tangent to flange edge.
Side-Beam Clamps (MSS Type 27): For bottom of steel I-beams.
Steel-Beam Clamps with Eye Nuts (MSS Type 28): For attaching to bottom
of steel I-beams for heavy loads.
Linked-Steel Clamps with Eye Nuts (MSS Type 29): For attaching to bottom
of steel I-beams for heavy loads, with link extensions.
Malleable Beam Clamps with Extension Pieces (MSS Type 30): For
attaching to structural steel.
Welded-Steel Brackets: For support of pipes from below, or for suspending
from above by using clip and rod. Use one of the following for indicated
loads:
a.
b.
c.
13.
14.
15.
J.
230529-5
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Light (MSS Type 31): 750 lb.
Medium (MSS Type 32): 1500 lb.
Heavy (MSS Type 33): 3000 lb.
Side-Beam Brackets (MSS Type 34): For sides of steel or wooden beams.
Plate Lugs (MSS Type 57): For attaching to steel beams if flexibility at beam
is required.
Horizontal Travelers (MSS Type 58): For supporting piping systems subject
to linear horizontal movement where headroom is limited.
Saddles and Shields: Unless otherwise indicated and except as specified in piping
system Sections, install the following types:
1.
Steel Pipe-Covering Protection Saddles (MSS Type 39): To fill interior voids
with insulation that matches adjoining insulation.
PORSCHE OF NORTH HOUSTON
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PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
K.
230529-6
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Protection Shields (MSS Type 40): Of length recommended in writing by
manufacturer to prevent crushing insulation.
Thermal-Hanger Shield Inserts: For supporting insulated pipe.
Spring Hangers and Supports: Unless otherwise indicated and except as specified
in piping system Sections, install the following types:
1.
2.
Restraint-Control Devices (MSS Type 47): Where indicated to control piping
movement.
Constant Supports: For critical piping stress and if necessary to avoid
transfer of stress from one support to another support, critical terminal, or
connected equipment. Include auxiliary stops for erection, hydrostatic test,
and load-adjustment capability. These supports include the following types:
a.
b.
c.
Horizontal (MSS Type 54): Mounted horizontally.
Vertical (MSS Type 55): Mounted vertically.
Trapeze (MSS Type 56): Two vertical-type supports and one trapeze
member.
L.
Comply with MSS SP-69 for trapeze pipe hanger selections and applications that
are not specified in piping system Sections.
M.
Comply with MFMA-102 for metal framing system selections and applications that
are not specified in piping system Sections.
3.2
HANGER AND SUPPORT INSTALLATION
A.
Steel Pipe Hanger Installation: Comply with MSS SP-69 and MSS SP-89. Install
hangers, supports, clamps, and attachments as required to properly support piping
from building structure.
B.
Trapeze Pipe Hanger Installation: Comply with MSS SP-69 and MSS SP-89.
Arrange for grouping of parallel runs of horizontal piping and support together on
field-fabricated trapeze pipe hangers.
1.
2.
Pipes of Various Sizes: Support together and space trapezes for smallest
pipe size or install intermediate supports for smaller diameter pipes as
specified above for individual pipe hangers.
Field fabricate from ASTM A 36/A 36M, steel shapes selected for loads being
supported. Weld steel according to AWS D1.1.
C.
Metal Framing System Installation: Arrange for grouping of parallel runs of piping
and support together on field-assembled metal framing systems.
D.
Thermal-Hanger Shield Installation: Install in pipe hanger or shield for insulated
piping.
E.
Install hangers and supports complete with necessary inserts, bolts, rods, nuts,
washers, and other accessories.
F.
Equipment Support Installation: Fabricate from welded-structural-steel shapes.
G.
Install lateral bracing with pipe hangers and supports to prevent swaying.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230529-7
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
H.
Load Distribution: Install hangers and supports so piping live and dead loads and
stresses from movement will not be transmitted to connected equipment.
I.
Pipe Slopes: Install hangers and supports to provide indicated pipe slopes and so
maximum pipe deflections allowed by ASME B31.1 (for power piping) and
ASME B31.9 (for building services piping) are not exceeded.
J.
Insulated Piping: Comply with the following:
1.
Attach clamps and spacers to piping.
a.
2.
Install MSS SP-58, Type 40, protective shields on cold piping with vapor
barrier. Shields shall span an arc of 180 degrees.
a.
3.
Option: Thermal-hanger shield inserts may be used. Include steel
weight-distribution plate for pipe NPS 4 and larger if pipe is installed on
rollers.
Shield Dimensions for Pipe: Not less than the following:
a.
b.
3.3
Piping Operating below Ambient Air Temperature: Use thermal-hanger
shield insert with clamp sized to match OD of insert.
NPS 1/4 to NPS 3-1/2: 12 inches long and 0.048 inch thick.
NPS 4: 12 inches long and 0.06 inch thick.
4.
Insert Material: Length at least as long as protective shield.
5.
Thermal-Hanger Shields:
insulation.
Install with insulation same thickness as piping
EQUIPMENT SUPPORTS
A.
Fabricate structural-steel stands to suspend equipment from structure overhead or
to support equipment above floor.
B.
Grouting: Place grout under supports for equipment and make smooth bearing
surface.
C.
Provide lateral bracing, to prevent swaying, for equipment supports.
3.4
METAL FABRICATIONS
A.
Cut, drill, and fit miscellaneous metal fabrications for trapeze pipe hangers and
equipment supports.
B.
Fit exposed connections together to form hairline joints. Field weld connections
that cannot be shop welded because of shipping size limitations.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
C.
Field Welding: Comply with AWS D1.1 procedures for shielded metal arc welding,
appearance and quality of welds, and methods used in correcting welding work,
and with the following:
1.
2.
3.
4.
3.5
230529-8
HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Use materials and methods that minimize distortion and develop strength and
corrosion resistance of base metals.
Obtain fusion without undercut or overlap.
Remove welding flux immediately.
Finish welds at exposed connections so no roughness shows after finishing
and contours of welded surfaces match adjacent contours.
ADJUSTING
A.
Hanger Adjustments: Adjust hangers to distribute loads equally on attachments
and to achieve indicated slope of pipe.
B.
Trim excess length of continuous-thread hanger and support rods to 1-1/2 inches.
3.6
A.
PAINTING
Touch Up: Clean field welds and abraded areas of shop paint. Paint exposed
areas immediately after erecting hangers and supports. Use same materials as
used for shop painting. Comply with SSPC-PA 1 requirements for touching up
field-painted surfaces.
1.
B.
Apply paint by brush or spray to provide minimum dry film thickness of 2.0
mils.
Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and
apply galvanizing-repair paint to comply with ASTM A 780.
END OF SECTION 23 05 29
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230548-1
VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
SECTION 230548 - VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT
PART 1 - GENERAL
1.1
A.
SUMMARY
This Section includes the following:
1.
2.
3.
4.
5.
6.
7.
1.2
A.
PERFORMANCE REQUIREMENTS
Wind-Restraint Loading:
1.
2.
3.
1.3
Isolation pads.
Isolation mounts.
Housed spring mounts.
Elastomeric hangers.
Spring hangers.
Pipe riser resilient supports.
Resilient pipe guides.
Basic Wind Speed: 140 MPH.
Building Classification Category: Per Architect.
Minimum 10 lb/sq. ft. multiplied by the maximum area of the HVAC component
projected on a vertical plane that is normal to the wind direction, and 45 degrees
either side of normal.
SUBMITTALS
A.
Product Data: For each product indicated.
B.
Delegated-Design Submittal: For vibration isolation and seismic-restraint calculations
and details indicated to comply with performance requirements and design criteria,
including analysis data signed and sealed by the qualified professional engineer
responsible for their preparation.
C.
Welding certificates.
D.
Qualification Data: For professional engineer.
E.
Field quality-control test reports.
1.4
A.
QUALITY ASSURANCE
Welding: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural
Welding Code - Steel."
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230548-2
VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
PART 2 - PRODUCTS
2.1
A.
VIBRATION ISOLATORS
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
B.
Pads: Arranged in single or multiple layers of sufficient stiffness for uniform loading
over pad area, molded with a nonslip pattern and galvanized-steel baseplates, and
factory cut to sizes that match requirements of supported equipment.
1.
C.
Resilient Material: Oil- and water-resistant neoprene.
Mounts: Double-deflection type, with molded, oil-resistant rubber, hermetically sealed
compressed fiberglass, or neoprene isolator elements with factory-drilled,
encapsulated top plate for bolting to equipment and with baseplate for bolting to
structure. Color-code or otherwise identify to indicate capacity range.
1.
2.
D.
Ace Mountings Co., Inc.
Amber/Booth Company, Inc.
California Dynamics Corporation.
Isolation Technology, Inc.
Kinetics Noise Control.
Mason Industries.
Vibration Eliminator Co., Inc.
Vibration Isolation.
Vibration Mountings & Controls, Inc.
Materials: Cast-ductile-iron or welded steel housing containing two separate and
opposing, oil-resistant rubber or neoprene elements that prevent central threaded
element and attachment hardware from contacting the housing during normal
operation.
Neoprene: Shock-absorbing materials compounded according to the standard
for bridge-bearing neoprene as defined by AASHTO.
Housed Spring Mounts: Housed spring isolator with integral seismic snubbers.
1.
2.
3.
Housing: Ductile-iron or steel housing to provide all-directional seismic restraint.
Base: Factory drilled for bolting to structure.
Snubbers: Vertically adjustable to allow a maximum of 1/4-inch travel up or
down before contacting a resilient collar.
E.
Elastomeric Hangers: Single or double-deflection type, fitted with molded, oil-resistant
elastomeric isolator elements bonded to steel housings with threaded connections for
hanger rods. Color-code or otherwise identify to indicate capacity range.
F.
Spring Hangers: Combination coil-spring and elastomeric-insert hanger with spring
and insert in compression.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
5.
6.
7.
230548-3
VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Frame: Steel, fabricated for connection to threaded hanger rods and to allow for
a maximum of 30 degrees of angular hanger-rod misalignment without binding or
reducing isolation efficiency.
Outside Spring Diameter: Not less than 80 percent of the compressed height of
the spring at rated load.
Minimum Additional Travel: 50 percent of the required deflection at rated load.
Lateral Stiffness: More than 80 percent of rated vertical stiffness.
Overload Capacity: Support 200 percent of rated load, fully compressed, without
deformation or failure.
Elastomeric Element: Molded, oil-resistant rubber or neoprene. Steel-washerreinforced cup to support spring and bushing projecting through bottom of frame.
Self-centering hanger rod cap to ensure concentricity between hanger rod and
support spring coil.
G.
Pipe Riser Resilient Support: All-directional, acoustical pipe anchor consisting of 2
steel tubes separated by a minimum of 1/2-inch-thick neoprene. Include steel and
neoprene vertical-limit stops arranged to prevent vertical travel in both directions.
Design support for a maximum load on the isolation material of 500 psig and for equal
resistance in all directions.
H.
Resilient Pipe Guides: Telescopic arrangement of 2 steel tubes or post and sleeve
arrangement separated by a minimum of 1/2-inch-thick neoprene. Where clearances
are not readily visible, a factory-set guide height with a shear pin to allow vertical
motion due to pipe expansion and contraction shall be fitted. Shear pin shall be
removable and reinsertable to allow for selection of pipe movement. Guides shall be
capable of motion to meet location requirements.
PART 3 - EXECUTION
3.1
APPLICATIONS
A.
Multiple Pipe Supports: Secure pipes to trapeze member with clamps approved for
application by an agency acceptable to authorities having jurisdiction.
B.
Hanger Rod Stiffeners: Install hanger rod stiffeners where indicated or scheduled on
Drawings to receive them and where required to prevent buckling of hanger rods due
to seismic forces.
C.
Strength of Support Assemblies: Where not indicated, select sizes of components so
strength will be adequate to carry present and future static and seismic loads within
specified loading limits.
3.2
VIBRATION-CONTROL DEVICE INSTALLATION
A.
Comply with requirements in Division 07 Section "Roof Accessories" for installation of
roof curbs, equipment supports, and roof penetrations.
B.
Equipment Restraints:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
C.
230548-4
VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
Install resilient bolt isolation washers on equipment anchor bolts where clearance
between anchor and adjacent surface exceeds 0.125 inch.
Piping Restraints:
1.
2.
Comply with requirements in MSS SP-127.
Space lateral supports a maximum of 40 feet o.c., and longitudinal supports a
maximum of 80 feet o.c.
D.
Install bushing assemblies for anchor bolts for floor-mounted equipment, arranged to
provide resilient media between anchor bolt and mounting hole in concrete base.
E.
Attachment to Structure: If specific attachment is not indicated, anchor bracing to
structure at flanges of beams, at upper truss chords of bar joists, or at concrete
members.
F.
Drilled-in Anchors:
1.
2.
3.
4.
5.
3.3
Identify position of reinforcing steel and other embedded items prior to drilling
holes for anchors. Do not damage existing reinforcing or embedded items during
coring or drilling. Notify the structural engineer if reinforcing steel or other
embedded items are encountered during drilling. Locate and avoid prestressed
tendons, electrical and telecommunications conduit, and gas lines.
Do not drill holes in concrete or masonry until concrete, mortar, or grout has
achieved full design strength.
Wedge Anchors: Protect threads from damage during anchor installation.
Heavy-duty sleeve anchors shall be installed with sleeve fully engaged in the
structural element to which anchor is to be fastened.
Set anchors to manufacturer's recommended torque, using a torque wrench.
Install zinc-coated steel anchors for interior and stainless-steel anchors for
exterior applications.
FIELD QUALITY CONTROL
A.
Perform tests and inspections.
B.
Tests and Inspections:
1.
2.
3.
4.
5.
6.
7.
Provide evidence of recent calibration of test equipment by a testing agency
acceptable to authorities having jurisdiction.
Schedule test with Owner, through Architect, before connecting anchorage
device to restrained component (unless postconnection testing has been
approved), and with at least seven days' advance notice.
Obtain Architect's approval before transmitting test loads to structure. Provide
temporary load-spreading members.
Test at least four of each type and size of installed anchors and fasteners
selected by Architect.
Test to 90 percent of rated proof load of device.
Measure isolator restraint clearance.
Measure isolator deflection.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
8.
230548-5
VIBRATION CONTROL FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
If a device fails test, modify all installations of same type and retest until
satisfactory results are achieved.
C.
Remove and replace malfunctioning units and retest as specified above.
D.
Prepare test and inspection reports.
3.4
ADJUSTING
A.
Adjust isolators after piping system is at operating weight.
B.
Adjust limit stops on restrained spring isolators to mount equipment at normal
operating height. After equipment installation is complete, adjust limit stops so they are
out of contact during normal operation.
C.
Adjust active height of spring isolators.
D.
Adjust restraints to permit free movement of equipment within normal mode of
operation.
END OF SECTION 230548
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230553-1
IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
SECTION 230553 - IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 01 Specification Sections, apply to this
Section.
SUMMARY
Section Includes:
1.
2.
1.3
Equipment labels.
Warning signs and labels.
SUBMITTALS
A.
Product Data: For each type of product indicated.
B.
Samples: For color, letter style, and graphic representation required for each
identification material and device.
C.
Equipment Label Schedule: Include a listing of all equipment to be labeled with
the proposed content for each label.
1.4
COORDINATION
A.
Coordinate installation of identifying devices with completion of covering and
painting of surfaces where devices are to be applied.
B.
Coordinate installation of identifying devices with locations of access panels
and doors.
C.
Install identifying devices before installing acoustical ceilings and similar
concealment.
PART 2 - PRODUCTS
2.1
A.
t
EQUIPMENT LABELS
Metal Labels for Equipment:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
5.
B.
Material and Thickness: Aluminum, 0.032-inch or anodized aluminum,
0.032-inch minimum thickness and having predrilled or stamped holes for
attachment hardware.
Minimum Label Size: Length and width vary for required label content,
but not less than 2-1/2 by 3/4 inch.
Minimum Letter Size: 1/4 inch for name of units if viewing distance is less
than 24 inches, 1/2 inch for viewing distances up to 72 inches, and
proportionately larger lettering for greater viewing distances. Include
secondary lettering two-thirds to three-fourths the size of principal
lettering.
Fasteners: Stainless-steel rivets or self-tapping screws.
Adhesive: Contact-type permanent adhesive, compatible with label and
with substrate.
Plastic Labels for Equipment:
1.
2.
3.
4.
5.
6.
7.
8.
Material and Thickness:
Multilayer, multicolor, plastic labels for
mechanical engraving, 1/8 inch thick, and having predrilled holes for
attachment hardware.
Letter Color: White.
Background Color: Black.
Maximum Temperature: Able to withstand temperatures up to 160 deg F.
Minimum Label Size: Length and width vary for required label content,
but not less than 2-1/2 by 3/4 inch.
Minimum Letter Size: 1/4 inch for name of units if viewing distance is less
than 24 inches, 1/2 inch for viewing distances up to 72 inches, and
proportionately larger lettering for greater viewing distances. Include
secondary lettering two-thirds to three-fourths the size of principal
lettering.
Fasteners: Stainless-steel rivets or self-tapping screws.
Adhesive: Contact-type permanent adhesive, compatible with label and
with substrate.
C.
Label Content: Include equipment's Drawing designation or unique equipment
number, Drawing numbers where equipment is indicated (plans, details, and
schedules).
D.
Equipment Label Schedule: For each item of equipment to be labeled, on 81/2-by-11-inch (A4) bond paper. Tabulate equipment identification number and
identify Drawing numbers where equipment is indicated (plans, details, and
schedules).
Equipment schedule shall be included in operation and
maintenance data.
2.2
t
230553-2
IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
WARNING SIGNS AND LABELS
A.
Material and Thickness: Multilayer, multicolor, plastic labels for mechanical
engraving, 1/8 inch thick, and having predrilled holes for attachment hardware.
B.
Letter Color: White.
C.
Background Color: Red.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230553-3
IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT
NOVEMBER 24, 2015
D.
Maximum Temperature: Able to withstand temperatures up to 160 deg F.
E.
Minimum Label Size: Length and width vary for required label content, but not
less than 2-1/2 by 3/4 inch.
F.
Minimum Letter Size: 1/4 inch for name of units if viewing distance is less than
24 inches, 1/2 inch for viewing distances up to 72 inches, and proportionately
larger lettering for greater viewing distances. Include secondary lettering twothirds to three-fourths the size of principal lettering.
G.
Fasteners: Stainless-steel rivets or self-tapping screws.
H.
Adhesive: Contact-type permanent adhesive, compatible with label and with
substrate.
I.
Label Content: Include caution and warning information, plus emergency
notification instructions.
PART 3 - EXECUTION
3.1
A.
3.2
PREPARATION
Clean piping and equipment surfaces of substances that could impair bond of
identification devices, including dirt, oil, grease, release agents, and
incompatible primers, paints, and encapsulants.
EQUIPMENT LABEL INSTALLATION
A.
Install or permanently fasten labels on each major item of mechanical
equipment.
B.
Locate equipment labels where accessible and visible and on north side of
exterior equipment to minimize exposure to sun.
END OF SECTION 230553
t
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230593-1
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
SECTION 230593 - TESTING, ADJUSTING, AND BALANCING FOR HVAC
PART 1 - GENERAL
1.1
A.
SUMMARY
Section Includes:
1.
Balancing Air Systems:
a.
b.
1.2
Constant-volume air systems.
Exhaust hood airflow balancing.
DEFINITIONS
A.
AABC: Associated Air Balance Council.
B.
NEBB: National Environmental Balancing Bureau.
C.
TAB: Testing, adjusting, and balancing.
D.
TABB: Testing, Adjusting, and Balancing Bureau.
E.
TAB Specialist: An entity engaged to perform TAB Work.
1.3
SUBMITTALS
A.
Strategies and Procedures Plan: Within 90 days of Contractor's Notice to Proceed,
submit TAB strategies and step-by-step procedures as specified in "Preparation"
Article.
B.
Certified TAB reports.
1.4
A.
QUALITY ASSURANCE
TAB Contractor Qualifications: Engage a TAB entity certified by AABC or NEBB.
1.
2.
B.
TAB Field Supervisor: Employee of the TAB contractor and certified by AABC or
NEBB.
TAB Technician: Employee of the TAB contractor and who is certified by AABC
or NEBB as a TAB technician.
Certify TAB field data reports and perform the following:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
230593-2
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Review field data reports to validate accuracy of data and to prepare certified
TAB reports.
Certify that the TAB team complied with the approved TAB plan and the
procedures specified and referenced in this Specification.
C.
TAB Report Forms: Use standard TAB contractor's forms approved by Architect.
D.
Instrumentation Type, Quantity, Accuracy, and Calibration:
ASHRAE 111, Section 5, "Instrumentation."
As described in
PART 2 - PRODUCTS (Not Applicable)
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine the Contract Documents to become familiar with Project requirements and to
discover conditions in systems' designs that may preclude proper TAB of systems and
equipment.
B.
Examine systems for installed balancing devices, such as test ports, gage cocks,
thermometer wells, flow-control devices, balancing valves and fittings, and manual
volume dampers. Verify that locations of these balancing devices are accessible.
C.
Examine the approved submittals for HVAC systems and equipment.
D.
Examine design data including HVAC system descriptions, statements of design
assumptions for environmental conditions and systems' output, and statements of
philosophies and assumptions about HVAC system and equipment controls.
E.
Examine equipment performance data including fan curves.
1.
2.
Relate performance data to Project conditions and requirements, including
system effects that can create undesired or unpredicted conditions that cause
reduced capacities in all or part of a system.
Calculate system-effect factors to reduce performance ratings of HVAC
equipment when installed under conditions different from the conditions used to
rate equipment performance. To calculate system effects for air systems, use
tables and charts found in AMCA 201, "Fans and Systems," or in SMACNA's
"HVAC Systems - Duct Design." Compare results with the design data and
installed conditions.
F.
Examine system and equipment installations and verify that field quality-control testing,
cleaning, and adjusting specified in individual Sections have been performed.
G.
Examine test reports specified in individual system and equipment Sections.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230593-3
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
H.
Examine HVAC equipment and filters and verify that bearings are greased, belts are
aligned and tight, and equipment with functioning controls is ready for operation.
I.
Examine heat-transfer coils for correct piping connections and for clean and straight
fins.
J.
Examine operating safety interlocks and controls on HVAC equipment.
K.
Report deficiencies discovered before and during performance of TAB procedures.
Observe and record system reactions to changes in conditions. Record default set
points if different from indicated values.
3.2
PREPARATION
A.
Prepare a TAB plan that includes strategies and step-by-step procedures.
B.
Complete system-readiness checks and prepare reports. Verify the following:
1.
2.
3.
4.
5.
6.
3.3
A.
GENERAL PROCEDURES FOR TESTING AND BALANCING
Perform testing and balancing procedures on each system according to the procedures
contained in AABC's "National Standards for Total System Balance" ASHRAE 111 or
NEBB's "Procedural Standards for Testing, Adjusting, and Balancing of Environmental
Systems" and in this Section.
1.
B.
Comply with requirements in ASHRAE 62.1-2004, Section 7.2.2, "Air Balancing."
Cut insulation, ducts, pipes, and equipment cabinets for installation of test probes to
the minimum extent necessary for TAB procedures.
1.
2.
C.
Permanent electrical-power wiring is complete.
Automatic temperature-control systems are operational.
Equipment and duct access doors are securely closed.
Balance and fire dampers are open.
Ceilings are installed in critical areas where air-pattern adjustments are required
and access to balancing devices is provided.
Windows and doors can be closed so indicated conditions for system operations
can be met.
After testing and balancing, patch probe holes in ducts with same material and
thickness as used to construct ducts.
Install and join new insulation that matches removed materials. Restore
insulation, coverings, vapor barrier, and finish according to Division 23 Section
"HVAC Insulation."
Mark equipment and balancing devices, including damper-control positions, valve
position indicators, fan-speed-control levers, and similar controls and devices, with
paint or other suitable, permanent identification material to show final settings.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
D.
3.4
230593-4
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Take and report testing and balancing measurements in inch-pound (IP) units.
GENERAL PROCEDURES FOR BALANCING AIR SYSTEMS
A.
Prepare test reports for both fans and outlets. Obtain manufacturer's outlet factors and
recommended testing procedures. Crosscheck the summation of required outlet
volumes with required fan volumes.
B.
Prepare schematic diagrams of systems' "as-built" duct layouts.
C.
Determine the best locations in main and branch ducts for accurate duct-airflow
measurements.
D.
Check airflow patterns from the outdoor-air louvers and dampers and the return- and
exhaust-air dampers through the supply-fan discharge and mixing dampers.
E.
Locate start-stop and disconnect switches, electrical interlocks, and motor starters.
F.
Verify that motor starters are equipped with properly sized thermal protection.
G.
Check dampers for proper position to achieve desired airflow path.
H.
Check for airflow blockages.
I.
Check condensate drains for proper connections and functioning.
J.
Check for proper sealing of air-handling-unit components.
K.
Verify that air duct system is sealed as specified in Division 23 Section "Metal Ducts."
3.5
A.
PROCEDURES FOR CONSTANT-VOLUME AIR SYSTEMS
Adjust fans to deliver total indicated airflows within the maximum allowable fan speed
listed by fan manufacturer.
1.
Measure total airflow.
a.
2.
Where sufficient space in ducts is unavailable for Pitot-tube traverse
measurements, measure airflow at terminal outlets and inlets and calculate
the total airflow.
Measure fan static pressures as follows to determine actual static pressure:
a.
b.
Measure outlet static pressure as far downstream from the fan as practical
and upstream from restrictions in ducts such as elbows and transitions.
Measure static pressure directly at the fan outlet or through the flexible
connection.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
c.
d.
3.
5.
6.
7.
B.
Measure static pressures entering and leaving other devices, such as sound
traps, heat-recovery equipment, and air washers, under final balanced
conditions.
Review Record Documents to determine variations in design static pressures
versus actual static pressures.
Calculate actual system-effect factors.
Recommend adjustments to accommodate actual conditions.
Obtain approval from Architect for adjustment of fan speed higher or lower than
indicated speed. Comply with requirements in Division 23 Sections for airhandling units for adjustment of fans, belts, and pulley sizes to achieve indicated
air-handling-unit performance.
Do not make fan-speed adjustments that result in motor overload. Consult
equipment manufacturers about fan-speed safety factors. Modulate dampers
and measure fan-motor amperage to ensure that no overload will occur.
Measure amperage in full-cooling, full-heating, economizer, and any other
operating mode to determine the maximum required brake horsepower.
Measure airflow of submain and branch ducts.
a.
2.
3.
Where sufficient space in submain and branch ducts is unavailable for
Pitot-tube traverse measurements, measure airflow at terminal outlets and
inlets and calculate the total airflow for that zone.
Measure static pressure at a point downstream from the balancing damper, and
adjust volume dampers until the proper static pressure is achieved.
Remeasure each submain and branch duct after all have been adjusted.
Continue to adjust submain and branch ducts to indicated airflows within
specified tolerances.
Measure air outlets and inlets without making adjustments.
1.
D.
Report the cleanliness status of filters and the time static pressures are
measured.
Adjust volume dampers for main duct, submain ducts, and major branch ducts to
indicated airflows within specified tolerances.
1.
C.
Measure inlet static pressure of single-inlet fans in the inlet duct as near
the fan as possible, upstream from the flexible connection, and
downstream from duct restrictions.
Measure inlet static pressure of double-inlet fans through the wall of the
plenum that houses the fan.
Measure static pressure across each component that makes up an air-handling
unit, rooftop unit, and other air-handling and -treating equipment.
a.
4.
230593-5
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Measure terminal outlets using a direct-reading hood or outlet manufacturer's
written instructions and calculating factors.
Adjust air outlets and inlets for each space to indicated airflows within specified
tolerances of indicated values. Make adjustments using branch volume dampers
rather than extractors and the dampers at air terminals.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.6
A.
3.7
Adjust each outlet in same room or space to within specified tolerances of
indicated quantities without generating noise levels above the limitations
prescribed by the Contract Documents.
Adjust patterns of adjustable outlets for proper distribution without drafts.
PROCEDURES FOR MOTORS
Motors, 1/2 HP and Larger: Test at final balanced conditions and record the following
data:
1.
2.
3.
4.
5.
6.
7.
B.
230593-6
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Manufacturer's name, model number, and serial number.
Motor horsepower rating.
Motor rpm.
Efficiency rating.
Nameplate and measured voltage, each phase.
Nameplate and measured amperage, each phase.
Starter thermal-protection-element rating.
Motors Driven by Variable-Frequency Controllers: Test for proper operation at speeds
varying from minimum to maximum. Test the manual bypass of the controller to prove
proper operation. Record observations including name of controller manufacturer,
model number, serial number, and nameplate data.
PROCEDURES FOR CONDENSING UNITS
A.
Verify proper rotation of fans.
B.
Measure entering- and leaving-air temperatures.
C.
Record compressor data.
3.8
A.
PROCEDURES FOR HEAT-TRANSFER COILS
Measure, adjust, and record the following data for each water coil:
1.
2.
3.
4.
5.
B.
Entering- and leaving-water temperature.
Dry-bulb temperature of entering and leaving air.
Wet-bulb temperature of entering and leaving air for cooling coils.
Airflow.
Air pressure drop.
Measure, adjust, and record the following data for each electric heating coil:
1.
2.
3.
4.
Nameplate data.
Airflow.
Entering- and leaving-air temperature at full load.
Voltage and amperage input of each phase at full load and at each incremental
stage.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
5.
6.
C.
A.
Set HVAC system's air flow rates and water flow rates within the following tolerances:
2.
A.
3.11
A.
Initial Construction-Phase Report: Based on examination of the Contract Documents
as specified in "Examination" Article, prepare a report on the adequacy of design for
systems' balancing devices.
Recommend changes and additions to systems'
balancing devices to facilitate proper performance measuring and balancing.
Recommend changes and additions to HVAC systems and general construction to
allow access for performance measuring and balancing devices.
FINAL REPORT
General: Prepare a certified written report; tabulate and divide the report into separate
sections for tested systems and balanced systems.
2.
Include a certification sheet at the front of the report's binder, signed and sealed
by the certified testing and balancing engineer.
Include a list of instruments used for procedures, along with proof of calibration.
Final Report Contents: In addition to certified field-report data, include the following:
1.
2.
3.
4.
C.
Supply, Return, and Exhaust Fans and Equipment with Fans: Plus or minus 10
percent.
Air Outlets and Inlets: Plus or minus 10 percent.
REPORTING
1.
B.
Dry-bulb temperature of entering and leaving air.
Wet-bulb temperature of entering and leaving air.
Airflow.
Air pressure drop.
Refrigerant suction pressure and temperature.
TOLERANCES
1.
3.10
Calculated kilowatt at full load.
Fuse or circuit-breaker rating for overload protection.
Measure, adjust, and record the following data for each refrigerant coil:
1.
2.
3.
4.
5.
3.9
230593-7
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Fan curves.
Manufacturers' test data.
Field test reports prepared by system and equipment installers.
Other information relative to equipment performance; do not include Shop
Drawings and product data.
General Report Data: In addition to form titles and entries, include the following data:
1.
Title page.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Name and address of the TAB contractor.
Project name.
Project location.
Architect's name and address.
Engineer's name and address.
Contractor's name and address.
Report date.
Signature of TAB supervisor who certifies the report.
Table of Contents with the total number of pages defined for each section of the
report. Number each page in the report.
Summary of contents including the following:
a.
b.
c.
12.
13.
14.
15.
e.
Settings for outdoor-, return-, and exhaust-air dampers.
Conditions of filters.
Cooling coil, wet- and dry-bulb conditions.
Fan drive settings including settings and percentage of maximum pitch
diameter.
Other system operating conditions that affect performance.
System Diagrams: Include schematic layouts of air distribution systems. Present each
system with single-line diagram and include the following:
1.
2.
3.
E.
Indicated versus final performance.
Notable characteristics of systems.
Description of system operation sequence if it varies from the Contract
Documents.
Nomenclature sheets for each item of equipment.
Data for terminal units, including manufacturer's name, type, size, and fittings.
Notes to explain why certain final data in the body of reports vary from indicated
values.
Test conditions for fans and pump performance forms including the following:
a.
b.
c.
d.
D.
230593-8
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Quantities of outdoor, supply, return, and exhaust airflows.
Duct, outlet, and inlet sizes.
Position of balancing devices.
Air-Handling-Unit Test Reports: For air-handling units with coils, include the following:
1.
Unit Data:
a.
b.
c.
d.
e.
f.
g.
h.
Unit identification.
Location.
Make and type.
Model number and unit size.
Manufacturer's serial number.
Unit arrangement and class.
Discharge arrangement.
Sheave make, size in inches, and bore.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
i.
j.
k.
2.
Motor make, and frame type and size.
Horsepower and rpm.
Volts, phase, and hertz.
Full-load amperage and service factor.
Sheave make, size in inches, and bore.
Center-to-center dimensions of sheave, and amount of adjustments in
inches.
Test Data (Indicated and Actual Values):
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
F.
Center-to-center dimensions of sheave, and amount of adjustments in
inches.
Number, make, and size of belts.
Number, type, and size of filters.
Motor Data:
a.
b.
c.
d.
e.
f.
3.
230593-9
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Total air flow rate in cfm.
Total system static pressure in inches wg.
Fan rpm.
Discharge static pressure in inches wg.
Filter static-pressure differential in inches wg.
Cooling-coil static-pressure differential in inches wg.
Heating-coil static-pressure differential in inches wg.
Outdoor airflow in cfm.
Return airflow in cfm.
Outdoor-air damper position.
Return-air damper position.
Apparatus-Coil Test Reports:
1.
Coil Data:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
System identification.
Location.
Coil type.
Number of rows.
Fin spacing in fins per inch o.c.
Make and model number.
Face area in sq. ft.
Tube size in NPS.
Tube and fin materials.
Circuiting arrangement.
Test Data (Indicated and Actual Values):
a.
b.
c.
d.
e.
Air flow rate in cfm.
Average face velocity in fpm.
Air pressure drop in inches wg.
Outdoor-air, wet- and dry-bulb temperatures in deg F.
Return-air, wet- and dry-bulb temperatures in deg F.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
f.
g.
h.
i.
j.
k.
G.
Entering-air, wet- and dry-bulb temperatures in deg F.
Leaving-air, wet- and dry-bulb temperatures in deg F.
Refrigerant expansion valve and refrigerant types.
Refrigerant suction pressure in psig.
Refrigerant suction temperature in deg F.
Inlet steam pressure in psig.
Electric-Coil Test Reports: For electric furnaces, duct coils, and electric coils installed
in air-handling units, include the following:
1.
Unit Data:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
System identification.
Location.
Coil identification.
Capacity in Btu/h.
Number of stages.
Connected volts, phase, and hertz.
Rated amperage.
Air flow rate in cfm.
Face area in sq. ft.
Minimum face velocity in fpm.
Test Data (Indicated and Actual Values):
a.
b.
c.
d.
e.
f.
g.
H.
230593-10
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Heat output in Btu/h.
Air flow rate in cfm.
Air velocity in fpm.
Entering-air temperature in deg F.
Leaving-air temperature in deg F.
Voltage at each connection.
Amperage for each phase.
Fan Test Reports: For supply, return, and exhaust fans, include the following:
1.
Fan Data:
a.
b.
c.
d.
e.
f.
g.
h.
2.
System identification.
Location.
Make and type.
Model number and size.
Manufacturer's serial number.
Arrangement and class.
Sheave make, size in inches, and bore.
Center-to-center dimensions of sheave, and amount of adjustments in
inches.
Motor Data:
a.
b.
Motor make, and frame type and size.
Horsepower and rpm.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
c.
d.
e.
f.
g.
3.
Total airflow rate in cfm.
Total system static pressure in inches wg.
Fan rpm.
Discharge static pressure in inches wg.
Suction static pressure in inches wg.
Round and Rectangular Duct Traverse Reports: Include a diagram with a grid
representing the duct cross-section and record the following:
1.
Report Data:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
J.
Volts, phase, and hertz.
Full-load amperage and service factor.
Sheave make, size in inches, and bore.
Center-to-center dimensions of sheave, and amount of adjustments in
inches.
Number, make, and size of belts.
Test Data (Indicated and Actual Values):
a.
b.
c.
d.
e.
I.
230593-11
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
System and air-handling-unit number.
Location and zone.
Traverse air temperature in deg F.
Duct static pressure in inches wg.
Duct size in inches.
Duct area in sq. ft.
Indicated air flow rate in cfm.
Indicated velocity in fpm.
Actual air flow rate in cfm.
Actual average velocity in fpm.
Barometric pressure in psig.
Air-Terminal-Device Reports:
1.
Unit Data:
a.
b.
c.
d.
e.
f.
g.
h.
i.
2.
System and air-handling unit identification.
Location and zone.
Apparatus used for test.
Area served.
Make.
Number from system diagram.
Type and model number.
Size.
Effective area in sq. ft.
Test Data (Indicated and Actual Values):
a.
b.
c.
Air flow rate in cfm.
Air velocity in fpm.
Preliminary air flow rate as needed in cfm.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
d.
e.
f.
g.
3.12
230593-12
TESTING, ADJUSTING, AND BALANCING FOR HVAC
NOVEMBER 24, 2015
Preliminary velocity as needed in fpm.
Final air flow rate in cfm.
Final velocity in fpm.
Space temperature in deg F.
ADDITIONAL TESTS
A.
Within 90 days of completing TAB, perform additional TAB to verify that balanced
conditions are being maintained throughout and to correct unusual conditions.
B.
Seasonal Periods: If initial TAB procedures were not performed during near-peak
summer and winter conditions, perform additional TAB during near-peak summer and
winter conditions.
END OF SECTION 230593
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230700-1
HVAC INSULATION
NOVEMBER 24, 2015
SECTION 230700 - HVAC INSULATION
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 01 Specification Sections, apply to this
Section.
SUMMARY
Section Includes:
1.
Insulation Materials:
a.
b.
2.
3.
4.
5.
6.
7.
8.
B.
1.3
A.
1.4
Flexible elastomeric.
Mineral fiber.
Adhesives.
Mastics.
Sealants.
Field-applied fabric-reinforcing mesh.
Tapes.
Securements.
Corner angles.
Related Sections:
1.
Division 22 Section "Plumbing Insulation."
SUBMITTALS
Product Data: For each type of product indicated. Include thermal conductivity,
thickness, and jackets (both factory and field applied, if any).
QUALITY ASSURANCE
A.
Installer Qualifications: Skilled mechanics who have successfully completed an
apprenticeship program or another craft training program certified by the
Department of Labor, Bureau of Apprenticeship and Training.
B.
Fire-Test-Response Characteristics: Insulation and related materials shall have
fire-test-response characteristics indicated, as determined by testing identical
products per ASTM E 84, by a testing and inspecting agency acceptable to
authorities having jurisdiction. Factory label insulation and jacket materials and
adhesive, mastic, tapes, and cement material containers, with appropriate
markings of applicable testing and inspecting agency.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
1.5
A.
1.6
230700-2
HVAC INSULATION
NOVEMBER 24, 2015
Insulation Installed Indoors: Flame-spread index of 25 or less, and
smoke-developed index of 50 or less.
Insulation Installed Outdoors: Flame-spread index of 75 or less, and
smoke-developed index of 150 or less.
DELIVERY, STORAGE, AND HANDLING
Packaging: Insulation material containers shall be marked by manufacturer
with appropriate ASTM standard designation, type and grade, and maximum
use temperature.
COORDINATION
A.
Coordinate size and location of supports and hangers, specified in Division 23
Section "Hangers and Supports for HVAC Piping and Equipment."
B.
Coordinate clearance requirements with piping Installer for piping insulation
application, duct Installer for duct insulation application, and equipment Installer
for equipment insulation application. Before preparing piping and ductwork
Shop Drawings, establish and maintain clearance requirements for installation
of insulation and field-applied jackets and finishes and for space required for
maintenance.
1.7
A.
SCHEDULING
Schedule insulation application after pressure testing systems and, where
required, after installing and testing heat tracing. Insulation application may
begin on segments that have satisfactory test results.
PART 2 - PRODUCTS
2.1
INSULATION MATERIALS
A.
Comply with requirements in Part 3 schedule articles for where insulating
materials shall be applied.
B.
Products shall not contain asbestos, lead, mercury, or mercury compounds.
C.
Products that come in contact with stainless steel shall have a leachable
chloride content of less than 50 ppm when tested according to ASTM C 871.
D.
Foam insulation materials shall not use CFC or HCFC blowing agents in the
manufacturing process.
E.
Flexible Elastomeric: Closed-cell, sponge- or expanded-rubber materials.
Comply with ASTM C 534, Type I for tubular materials and Type II for sheet
materials.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work are limited to the following:
a.
b.
c.
F.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work are limited to the following:
a.
b.
c.
d.
e.
CertainTeed Corp.; Duct Wrap.
Johns Manville; Microlite.
Knauf Insulation; Duct Wrap.
Manson Insulation Inc.; Alley Wrap.
Owens Corning; All-Service Duct Wrap.
Mineral-Fiber Board Insulation:
Mineral or glass fibers bonded with a
thermosetting resin. Comply with ASTM C 612, Type IA or Type IB. For duct
and plenum applications, provide insulation with factory-applied FSK jacket.
For equipment applications, provide insulation with factory-applied FSK jacket.
Factory-applied jacket requirements are specified in "Factory-Applied Jackets"
Article.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work are limited to the following:
a.
b.
c.
d.
e.
f.
2.2
Aeroflex USA Inc.; Aerocel.
Armacell LLC; AP Armaflex.
RBX Corporation; Insul-Sheet 1800 and Insul-Tube 180.
Mineral-Fiber Blanket Insulation: Mineral or glass fibers bonded with a
thermosetting resin. Comply with ASTM C 553, Type II and ASTM C 1290,
Type III with factory-applied FSK jacket. Factory-applied jacket requirements
are specified in "Factory-Applied Jackets" Article.
1.
G.
230700-3
HVAC INSULATION
NOVEMBER 24, 2015
CertainTeed Corp.; Commercial Board.
Fibrex Insulations Inc.; FBX.
Johns Manville; 800 Series Spin-Glas.
Knauf Insulation; Insulation Board.
Manson Insulation Inc.; AK Board.
Owens Corning; Fiberglas 700 Series.
ADHESIVES
A.
Materials shall be compatible with insulation materials, jackets, and substrates
and for bonding insulation to itself and to surfaces to be insulated, unless
otherwise indicated.
B.
Flexible Elastomeric Adhesive: Comply with MIL-A-24179A, Type II, Class I.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work are limited to the following:
a.
b.
c.
Aeroflex USA Inc.; Aeroseal.
Armacell LCC; 520 Adhesive.
Foster Products Corporation, H. B. Fuller Company; 85-75.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
d.
2.
C.
For indoor applications, use adhesive that has a VOC content of 50 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work are limited to the following:
a.
b.
c.
d.
e.
2.
For indoor applications, use adhesive that has a VOC content of 80 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work are limited to the following:
a.
b.
c.
d.
e.
2.
A.
Childers Products, Division of ITW; CP-82.
Foster Products Corporation, H. B. Fuller Company; 85-20.
ITW TACC, Division of Illinois Tool Works; S-90/80.
Marathon Industries, Inc.; 225.
Mon-Eco Industries, Inc.; 22-25.
ASJ Adhesive, and FSK and PVDC Jacket Adhesive: Comply with MIL-A3316C, Class 2, Grade A for bonding insulation jacket lap seams and joints.
1.
2.3
RBX Corporation; Rubatex Contact Adhesive.
Mineral-Fiber Adhesive: Comply with MIL-A-3316C, Class 2, Grade A.
1.
D.
230700-4
HVAC INSULATION
NOVEMBER 24, 2015
Childers Products, Division of ITW; CP-82.
Foster Products Corporation, H. B. Fuller Company; 85-20.
ITW TACC, Division of Illinois Tool Works; S-90/80.
Marathon Industries, Inc.; 225.
Mon-Eco Industries, Inc.; 22-25.
For indoor applications, use adhesive that has a VOC content of 50 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
MASTICS
Vapor-Barrier Mastic: Solvent based; suitable for indoor use on below ambient
services.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
c.
d.
e.
Childers Products, Division of ITW; CP-30.
Foster Products Corporation, H. B. Fuller Company; 30-35.
ITW TACC, Division of Illinois Tool Works; CB-25.
Marathon Industries, Inc.; 501.
Mon-Eco Industries, Inc.; 55-10.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
4.
5.
B.
Water-Vapor Permeance: ASTM F 1249, 0.05 perm at 35-mil dry film
thickness.
Service Temperature Range: 0 to 180 deg F.
Solids Content: ASTM D 1644, 44 percent by volume and 62 percent by
weight.
Color: White.
Breather Mastic: Water based; suitable for indoor and outdoor use on above
ambient services.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
c.
d.
e.
f.
2.
3.
4.
5.
2.4
230700-5
HVAC INSULATION
NOVEMBER 24, 2015
Childers Products, Division of ITW; CP-10.
Foster Products Corporation, H. B. Fuller Company; 35-00.
ITW TACC, Division of Illinois Tool Works; CB-05/15.
Marathon Industries, Inc.; 550.
Mon-Eco Industries, Inc.; 55-50.
Vimasco Corporation; WC-1/WC-5.
Water-Vapor Permeance: ASTM F 1249, 3 perms) at 0.0625-inch dry film
thickness.
Service Temperature Range: Minus 20 to plus 200 deg F.
Solids Content: 63 percent by volume and 73 percent by weight.
Color: White.
FIELD-APPLIED JACKETS
A.
Field-applied jackets shall comply with ASTM C 921, Type I, unless otherwise
indicated.
B.
FSK Jacket:
backing.
C.
Aluminum Jacket: Comply with ASTM B 209, Alloy 3003, 3005, 3105 or 5005,
Temper H-14.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
c.
2.
3.
4.
Aluminum-foil-face, fiberglass-reinforced scrim with kraft-paper
Childers Products, Division of ITW; Metal Jacketing Systems.
PABCO Metals Corporation; Surefit.
RPR Products, Inc.; Insul-Mate.
Sheet and roll stock ready for shop or field sizing, Factory cut and rolled
to size.
Moisture Barrier for Outdoor Applications: 3-mil-thick, heat-bonded
polyethylene and kraft paper.
Factory-Fabricated Fitting Covers:
a.
Same material, finish, and thickness as jacket.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
b.
c.
d.
e.
f.
g.
D.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
A.
Polyguard; Alumaguard 60.
TAPES
ASJ Tape: White vapor-retarder tape matching factory-applied jacket with
acrylic adhesive, complying with ASTM C 1136.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
c.
d.
2.
3.
4.
5.
6.
7.
B.
Preformed 2-piece or gore, 45- and 90-degree, short- and longradius elbows.
Tee covers.
Flange and union covers.
End caps.
Beveled collars.
Field fabricate fitting covers only if factory-fabricated fitting covers
are not available.
Self-Adhesive Outdoor Jacket: 60-mil-thick, laminated vapor barrier and
waterproofing membrane for installation over insulation located aboveground
outdoors; consisting of a rubberized bituminous resin on a crosslaminated
polyethylene film covered with white aluminum-foil facing.
1.
2.5
230700-6
HVAC INSULATION
NOVEMBER 24, 2015
Avery Dennison Corporation, Specialty Tapes Division;
Fasson 0835.
Compac Corp.; 104 and 105.
Ideal Tape Co., Inc., an American Biltrite Company; 428 AWF ASJ.
Venture Tape; 1540 CW Plus, 1542 CW Plus, and 1542 CW
Plus/SQ.
Width: 3 inches.
Thickness: 11.5 mils.
Adhesion: 90 ounces force/inch in width.
Elongation: 2 percent.
Tensile Strength: 40 lbf/inch in width.
ASJ Tape Disks and Squares: Precut disks or squares of ASJ tape.
FSK Tape: Foil-face, vapor-retarder tape matching factory-applied jacket with
acrylic adhesive; complying with ASTM C 1136.
1.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
Avery Dennison Corporation,
Fasson 0827.
Compac Corp.; 110 and 111.
Specialty
Tapes
Division;
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
c.
d.
2.
3.
4.
5.
6.
7.
C.
Width: 3 inches.
Thickness: 6.5 mils.
Adhesion: 90 ounces force/inch in width.
Elongation: 2 percent.
Tensile Strength: 40 lbf/inch in width.
FSK Tape Disks and Squares: Precut disks or squares of FSK tape.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
c.
d.
2.
3.
4.
5.
6.
Width: 2 inches.
Thickness: 6 mils.
Adhesion: 64 ounces force/inch in width.
Elongation: 500 percent.
Tensile Strength: 18 lbf/inch in width.
Products: Subject to compliance with requirements, available products
that may be incorporated into the Work include, but are not limited to, the
following:
a.
b.
c.
d.
2.
3.
4.
5.
6.
A.
Avery Dennison Corporation, Specialty Tapes Division;
Fasson 0555.
Compac Corp.; 130.
Ideal Tape Co., Inc., an American Biltrite Company; 370 White PVC
tape.
Venture Tape; 1506 CW NS.
Aluminum-Foil Tape: Vapor-retarder tape with acrylic adhesive.
1.
2.6
Ideal Tape Co., Inc., an American Biltrite Company; 491 AWF FSK.
Venture Tape; 1525 CW, 1528 CW, and 1528 CW/SQ.
PVC Tape: White vapor-retarder tape matching field-applied PVC jacket with
acrylic adhesive. Suitable for indoor and outdoor applications.
1.
D.
230700-7
HVAC INSULATION
NOVEMBER 24, 2015
Avery Dennison Corporation, Specialty Tapes Division;
Fasson 0800.
Compac Corp.; 120.
Ideal Tape Co., Inc., an American Biltrite Company; 488 AWF.
Venture Tape; 3520 CW.
Width: 2 inches.
Thickness: 3.7 mils.
Adhesion: 100 ounces force/inch in width.
Elongation: 5 percent.
Tensile Strength: 34 lbf/inch in width.
SECUREMENTS
Insulation Pins and Hangers:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
Capacitor-Discharge-Weld Pins: Copper- or zinc-coated steel pin, fully
annealed for capacitor-discharge welding 0.106-inch diameter shank,
length to suit depth of insulation indicated.
a.
Products: Subject to compliance with requirements:
1)
2)
3)
4)
2.
AGM Industries, Inc.; CWP-1.
GEMCO; CD.
Midwest Fasteners, Inc.; CD.
Nelson Stud Welding; TPA, TPC, and TPS.
Cupped-Head, Capacitor-Discharge-Weld Pins: Copper- or zinc-coated
steel pin, fully annealed for capacitor-discharge welding,[0.106-inch
diameter shank, length to suit depth of insulation indicated with integral 11/2-inch galvanized carbon-steel washer.
a.
b.
3.
230700-8
HVAC INSULATION
NOVEMBER 24, 2015
Products: Subject to compliance with requirements, available
products that may be incorporated into the Work include, but are
not limited to, the following:
1)
AGM Industries, Inc.; CWP-1.
2)
GEMCO; Cupped Head Weld Pin.
3)
Midwest Fasteners, Inc.; Cupped Head.
Nelson Stud Welding; CHP.
Insulation-Retaining Washers: Self-locking washers formed from 0.016inch- thick, galvanized-steel sheet, with beveled edge sized as required
to hold insulation securely in place but not less than 1-1/2 inches in
diameter.
a.
Products: Subject to compliance with requirements, available
products that may be incorporated into the Work include, but are
not limited to, the following:
1)
2)
3)
4)
b.
AGM Industries, Inc.; RC-150.
GEMCO; R-150.
Midwest Fasteners, Inc.; WA-150.
Nelson Stud Welding; Speed Clips.
Protect ends with capped self-locking washers incorporating a
spring steel insert to ensure permanent retention of cap in exposed
locations.
B.
Staples: Outward-clinching insulation staples, nominal 3/4-inch wide, stainless
steel or Monel.
C.
Wire: 0.062-inch soft-annealed, galvanized steel.
1.
Manufacturers: Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
a.
b.
C & F Wire.
Childers Products.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
c.
d.
230700-9
HVAC INSULATION
NOVEMBER 24, 2015
PABCO Metals Corporation.
RPR Products, Inc.
PART 3 - EXECUTION
3.1
A.
EXAMINATION
Examine substrates and conditions for compliance with requirements for
installation and other conditions affecting performance of insulation application.
1.
2.
3.
3.2
Verify that systems and equipment to be insulated have been tested and
are free of defects.
Verify that surfaces to be insulated are clean and dry.
Proceed with installation only after unsatisfactory conditions have been
corrected.
PREPARATION
A.
Surface Preparation: Clean and dry surfaces to receive insulation. Remove
materials that will adversely affect insulation application.
B.
Mix insulating cements with clean potable water.
3.3
GENERAL INSTALLATION REQUIREMENTS
A.
Install insulation materials, accessories, and finishes with smooth, straight, and
even surfaces; free of voids throughout the length of equipment, ducts and
fittings, and piping including fittings, valves, and specialties.
B.
Install insulation materials, forms, vapor barriers or retarders, jackets, and
thicknesses required for each item of equipment, duct system, and pipe system
as specified in insulation system schedules.
C.
Install accessories compatible with insulation materials and suitable for the
service. Install accessories that do not corrode, soften, or otherwise attack
insulation or jacket in either wet or dry state.
D.
Install insulation with longitudinal seams at top and bottom of horizontal runs.
E.
Install multiple layers of insulation with longitudinal and end seams staggered.
F.
Do not weld brackets, clips, or other attachment devices to piping, fittings, and
specialties.
G.
Keep insulation materials dry during application and finishing.
H.
Install insulation with tight longitudinal seams and end joints. Bond seams and
joints with adhesive recommended by insulation material manufacturer.
I.
Install insulation with least number of joints practical.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230700-10
HVAC INSULATION
NOVEMBER 24, 2015
J.
Apply adhesives, mastics, and sealants at manufacturer's recommended
coverage rate and wet and dry film thicknesses.
K.
Install insulation with factory-applied jackets as follows:
1.
2.
3.
Draw jacket tight and smooth.
Cover circumferential joints with 3-inch wide strips, of same material as
insulation jacket. Secure strips with adhesive and outward clinching
staples along both edges of strip, spaced 4 inches o.c.
Overlap jacket longitudinal seams at least 1-1/2 inches. Install insulation
with longitudinal seams at bottom of pipe. Clean and dry surface to
receive self-sealing lap. Staple laps with outward clinching staples along
edge at 2 inches o.c.
a.
4.
5.
For below ambient services, apply vapor-barrier mastic over
staples.
Cover joints and seams with tape as recommended by insulation material
manufacturer to maintain vapor seal.
Where vapor barriers are indicated, apply vapor-barrier mastic on seams
and joints and at ends adjacent to duct and pipe flanges and fittings.
L.
Cut insulation in a manner to avoid compressing insulation more than 75
percent of its nominal thickness.
M.
Finish installation with systems at operating conditions.
separations and cracking due to thermal movement.
N.
Repair damaged insulation facings by applying same facing material over
damaged areas. Extend patches at least 4 inches beyond damaged areas.
Adhere, staple, and seal patches similar to butt joints.
O.
For above ambient services, do not install insulation to the following:
1.
2.
3.
4.
5.
6.
3.4
A.
Repair joint
Vibration-control devices.
Testing agency labels and stamps.
Nameplates and data plates.
Manholes.
Handholes.
Cleanouts.
PENETRATIONS
Insulation Installation at Roof Penetrations:
through roof penetrations.
1.
2.
3.
Install insulation continuously
Seal penetrations with flashing sealant.
For applications requiring only indoor insulation, terminate insulation
above roof surface and seal with joint sealant. For applications requiring
indoor and outdoor insulation, install insulation for outdoor applications
tightly joined to indoor insulation ends. Seal joint with joint sealant.
Extend jacket of outdoor insulation outside roof flashing at least 2 inches
below top of roof flashing.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
4.
B.
3.
4.
C.
Install insulation
Seal penetrations with flashing sealant.
For applications requiring only indoor insulation, terminate insulation
inside wall surface and seal with joint sealant. For applications requiring
indoor and outdoor insulation, install insulation for outdoor applications
tightly joined to indoor insulation ends. Seal joint with joint sealant.
Extend jacket of outdoor insulation outside wall flashing and overlap wall
flashing at least 2 inches.
Seal jacket to wall flashing with flashing sealant.
Insulation Installation at Floor Penetrations:
1.
2.
3.
3.5
Seal jacket to roof flashing with flashing sealant.
Installation at Aboveground Exterior Wall Penetrations:
continuously through wall penetrations.
1.
2.
230700-11
HVAC INSULATION
NOVEMBER 24, 2015
Duct: Install insulation continuously through floor penetrations that are
not fire rated. For penetrations through fire-rated assemblies, terminate
insulation at fire damper sleeves and externally insulate damper sleeve
beyond floor to match adjacent duct insulation. Overlap damper sleeve
and duct insulation at least 2 inches (50 mm).
Pipe: Install insulation continuously through floor penetrations.
Seal penetrations through fire-rated assemblies.
Comply with
requirements in Division 07 Section "Penetration Firestopping."
FLEXIBLE ELASTOMERIC INSULATION INSTALLATION
A.
Seal longitudinal seams and end joints with manufacturer's recommended
adhesive to eliminate openings in insulation that allow passage of air to surface
being insulated.
B.
Insulation Installation on Pipe Flanges:
1.
2.
3.
4.
C.
Insulation Installation on Pipe Fittings and Elbows:
1.
2.
D.
Install pipe insulation to outer diameter of pipe flange.
Make width of insulation section same as overall width of flange and
bolts, plus twice the thickness of pipe insulation.
Fill voids between inner circumference of flange insulation and outer
circumference of adjacent straight pipe segments with cut sections of
sheet insulation of same thickness as pipe insulation.
Secure insulation to flanges and seal seams with manufacturer's
recommended adhesive to eliminate openings in insulation that allow
passage of air to surface being insulated.
Install mitered sections of pipe insulation.
Secure insulation materials and seal seams with manufacturer's
recommended adhesive to eliminate openings in insulation that allow
passage of air to surface being insulated.
Insulation Installation on Valves and Pipe Specialties:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
3.6
A.
230700-12
HVAC INSULATION
NOVEMBER 24, 2015
Install preformed valve covers manufactured of same material as pipe
insulation when available.
When preformed valve covers are not available, install cut sections of
pipe and sheet insulation to valve body. Arrange insulation to permit
access to packing and to allow valve operation without disturbing
insulation.
Install insulation to flanges as specified for flange insulation application.
Secure insulation to valves and specialties and seal seams with
manufacturer's recommended adhesive to eliminate openings in
insulation that allow passage of air to surface being insulated.
MINERAL-FIBER INSULATION INSTALLATION
Blanket Insulation Installation on Ducts and Plenums: Secure with adhesive
and insulation pins.
1.
2.
3.
Apply adhesives according to manufacturer's recommended coverage
rates per unit area, for 100percent coverage of duct and plenum surfaces.
Apply adhesive to entire circumference of ducts and to all surfaces of
fittings and transitions.
Install either capacitor-discharge-weld pins and speed washers or
cupped-head, capacitor-discharge-weld pins on sides and bottom of
horizontal ducts and sides of vertical ducts as follows:
a.
b.
c.
d.
e.
f.
4.
On duct sides with dimensions 18 inches and smaller, place pins
along longitudinal centerline of duct. Space 3 inches maximum
from insulation end joints, and 16 inches o.c.
On duct sides with dimensions larger than 18 inches, place pins 16
inches o.c. each way, and 3 inches maximum from insulation joints.
Install additional pins to hold insulation tightly against surface at
cross bracing.
Pins may be omitted from top surface of horizontal, rectangular
ducts and plenums.
Do not overcompress insulation during installation.
Impale insulation over pins and attach speed washers.
Cut excess portion of pins extending beyond speed washers or
bend parallel with insulation surface. Cover exposed pins and
washers with tape matching insulation facing.
For ducts and plenums with surface temperatures below ambient, install a
continuous unbroken vapor barrier. Create a facing lap for longitudinal
seams and end joints with insulation by removing 2 inches from 1 edge
and 1 end of insulation segment. Secure laps to adjacent insulation
section with 1/2-inch outward-clinching staples, 1 inch o.c. Install vapor
barrier consisting of factory- or field-applied jacket, adhesive, vaporbarrier mastic, and sealant at joints, seams, and protrusions.
a.
b.
Repair punctures, tears, and penetrations with tape or mastic to
maintain vapor-barrier seal.
Install vapor stops for ductwork and plenums operating below 50
deg F at 18-foot intervals. Vapor stops shall consist of vapor-barrier
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
230700-13
HVAC INSULATION
NOVEMBER 24, 2015
mastic applied in a Z-shaped pattern over insulation face, along butt
end of insulation, and over the surface. Cover insulation face and
surface to be insulated a width equal to 2 times the insulation
thickness but not less than 3 inches.
5.
6.
7.
B.
Overlap unfaced blankets a minimum of 2 inches on longitudinal seams
and end joints. At end joints, secure with steel bands spaced a maximum
of 18 inches o.c.
Install insulation on rectangular duct elbows and transitions with a full
insulation section for each surface. Install insulation on round and flatoval duct elbows with individually mitered gores cut to fit the elbow.
Insulate duct stiffeners, hangers, and flanges that protrude beyond
insulation surface with 6-inch-wide strips of same material used to
insulate duct. Secure on alternating sides of stiffener, hanger, and flange
with pins spaced 6 inches o.c.
Board Insulation Installation on Ducts and Plenums: Secure with adhesive and
insulation pins.
1.
2.
3.
Apply adhesives according to manufacturer's recommended coverage
rates per unit area, for 100 percent coverage of duct and plenum
surfaces.
Apply adhesive to entire circumference of ducts and to all surfaces of
fittings and transitions.
Install either capacitor-discharge-weld pins and speed washers or
cupped-head, capacitor-discharge-weld pins on sides and bottom of
horizontal ducts and sides of vertical ducts as follows:
a.
b.
c.
d.
e.
4.
On duct sides with dimensions 18 inches and smaller, place pins
along longitudinal centerline of duct. Space 3 inches maximum
from insulation end joints, and 16 inches o.c.
On duct sides with dimensions larger than 18 inches, space pins 16
inches o.c. each way, and 3 inches maximum from insulation joints.
Install additional pins to hold insulation tightly against surface at
cross bracing.
Pins may be omitted from top surface of horizontal, rectangular
ducts and plenums.
Do not overcompress insulation during installation.
Cut excess portion of pins extending beyond speed washers or
bend parallel with insulation surface. Cover exposed pins and
washers with tape matching insulation facing.
For ducts and plenums with surface temperatures below ambient, install a
continuous unbroken vapor barrier. Create a facing lap for longitudinal
seams and end joints with insulation by removing 2 inches from 1 edge
and 1 end of insulation segment. Secure laps to adjacent insulation
section with 1/2-inch outward-clinching staples, 1 inch o.c. Install vapor
barrier consisting of factory- or field-applied jacket, adhesive, vaporbarrier mastic, and sealant at joints, seams, and protrusions.
a.
Repair punctures, tears, and penetrations with tape or mastic to
maintain vapor-barrier seal.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
b.
5.
6.
3.7
A.
Draw jacket material smooth and tight.
Install lap or joint strips with same material as jacket.
Secure jacket to insulation with manufacturer's recommended adhesive.
Install jacket with 1-1/2-inch laps at longitudinal seams and 3-inch- wide
joint strips at end joints.
Seal openings, punctures, and breaks in vapor-retarder jackets and
exposed insulation with vapor-barrier mastic.
Where PVC jackets are indicated, install with 1-inch overlap at longitudinal
seams and end joints; for horizontal applications, install with longitudinal seams
along top and bottom of tanks and vessels. Seal with manufacturer's
recommended adhesive.
1.
3.8
Install insulation on rectangular duct elbows and transitions with a full
insulation section for each surface. Groove and score insulation to fit as
closely as possible to outside and inside radius of elbows. Install
insulation on round and flat-oval duct elbows with individually mitered
gores cut to fit the elbow.
Insulate duct stiffeners, hangers, and flanges that protrude beyond
insulation surface with 6-inch-wide strips of same material used to
insulate duct. Secure on alternating sides of stiffener, hanger, and flange
with pins spaced 6 inches o.c.
Where FSK jackets are indicated, install as follows:
5.
C.
Install vapor stops for ductwork and plenums operating below 50
deg F at 18-foot intervals. Vapor stops shall consist of vapor-barrier
mastic applied in a Z-shaped pattern over insulation face, along butt
end of insulation, and over the surface. Cover insulation face and
surface to be insulated a width equal to 2 times the insulation
thickness but not less than 3 inches.
FIELD-APPLIED JACKET INSTALLATION
1.
2.
3.
4.
B.
230700-14
HVAC INSULATION
NOVEMBER 24, 2015
Apply two continuous beads of adhesive to seams and joints, one bead
under lap and the finish bead along seam and joint edge.
Where metal jackets are indicated, install with 2-inch overlap at longitudinal
seams and end joints. Overlap longitudinal seams arranged to shed water.
Seal end joints with weatherproof sealant recommended by insulation
manufacturer. Secure jacket with stainless-steel bands 12 inches o.c. and at
end joints.
FINISHES
A.
Flexible Elastomeric Thermal Insulation: After adhesive has fully cured, apply
two coats of insulation manufacturer's recommended protective coating.
B.
Color: Final color as selected by Architect. Vary first and second coats to allow
visual inspection of the completed Work.
C.
Do not field paint aluminum or stainless-steel jackets.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.9
230700-15
HVAC INSULATION
NOVEMBER 24, 2015
FIELD QUALITY CONTROL
A.
Testing Agency: Engage a qualified testing agency to perform tests and
inspections.
B.
Perform tests and inspections.
C.
Tests and Inspections:
1.
2.
D.
3.10
A.
All insulation applications will be considered defective Work if sample
inspection reveals noncompliance with requirements.
DUCT INSULATION SCHEDULE, GENERAL
Plenums and Ducts Requiring Insulation:
1.
2.
3.
4.
5.
6.
7.
8.
B.
3.
4.
5.
6.
7.
A.
Indoor, concealed supply and outdoor air.
Indoor, exposed supply and outdoor air.
Indoor, concealed return located in nonconditioned space.
Indoor, exposed return located in nonconditioned space.
Indoor, concealed oven and warewash exhaust.
Indoor, exposed oven and warewash exhaust.
Indoor, concealed exhaust between isolation damper and penetration of
building exterior.
Indoor, exposed exhaust between isolation damper and penetration of
building exterior.
Items Not Insulated:
1.
2.
3.11
Inspect ductwork, randomly selected by Architect, by removing fieldapplied jacket and insulation in layers in reverse order of their installation.
Extent of inspection shall be limited to one location(s) for each duct
system defined in the "Duct Insulation Schedule, General" Article.
Inspect field-insulated equipment, randomly selected by Architect, by
removing field-applied jacket and insulation in layers in reverse order of
their installation. Extent of inspection shall be limited to one location(s)
for each type of equipment defined in the "Equipment Insulation
Schedule" Article. For large equipment, remove only a portion adequate
to determine compliance.
Fibrous-glass ducts.
Metal ducts with duct liner of sufficient thickness to comply with energy
code and ASHRAE/IESNA 90.1.
Factory-insulated flexible ducts.
Factory-insulated plenums and casings.
Flexible connectors.
Vibration-control devices.
Factory-insulated access panels and doors.
DUCT INSULATION SCHEDULE
Concealed, supply-air duct insulation shall be the following:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
230700-16
HVAC INSULATION
NOVEMBER 24, 2015
Mineral-Fiber Blanket: 1-1/2 inches thick and 1.5-lb/cu. ft. nominal
density.
B.
Concealed, return-air duct insulation shall be the following:
1.
Mineral-Fiber Blanket: 1-1/2 inches thick and 1.5-lb/cu. ft. nominal
density.
C.
Concealed, outside-air duct insulation shall be the following:
1.
Mineral-Fiber Blanket: 1-1/2 inches thick and 1.5-lb/cu. ft. nominal
density.
3.12
A.
3.13
ABOVEGROUND,
SCHEDULE
OUTDOOR
DUCT
AND
PLENUM
INSULATION
Insulation materials and thicknesses are identified below. If more than one
material is listed for a duct system, selection from materials listed is
Contractor's option.
PIPING INSULATION SCHEDULE, GENERAL
A.
Acceptable preformed pipe and tubular insulation materials and thicknesses are
identified for each piping system and pipe size range. If more than one material
is listed for a piping system, selection from materials listed is Contractor's
option.
B.
Items Not Insulated: Unless otherwise indicated, do not install insulation on the
following:
1.
2.
3.
3.14
A.
Drainage piping located in crawl spaces.
Underground piping.
Chrome-plated pipes and fittings unless there is a potential for personnel
injury.
PIPING INSULATION SCHEDULE
Condensate and Equipment Drain Water below 60 Deg F:
1.
All Pipe Sizes: Insulation shall be one of the following:
a.
b.
B.
Flexible Elastomeric: 1 inch thick.
Mineral-Fiber, Preformed Pipe Insulation, Type I: 1 inch thick.
Refrigerant Suction and Hot-Gas Piping:
1.
All Pipe Sizes: Insulation shall be one of the following:
a.
b.
Flexible Elastomeric: 1 inch thick.
Mineral-Fiber, Preformed Pipe Insulation, Type I: 1 inch thick.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
C.
Refrigerant Suction and Hot-Gas Flexible Tubing:
1.
All Pipe Sizes: Insulation shall be the following:
a.
Flexible Elastomeric: 1 inch thick.
END OF SECTION 230700
230700-17
HVAC INSULATION
NOVEMBER 24, 2015
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
231115-1
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
SECTION 231115 FUEL GAS SYSTEMS
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
SUMMARY
This Section includes fuel gas piping within the building. Plumbing Contractor shall
include the following:
1.
2.
3.
4.
5.
6.
B.
Related Sections include the following:
1.
1.3
A.
Division 2 Section "Natural Gas Distribution" for natural gas service piping,
specialties, and accessories outside the building.
SUBMITTALS
Product Data: For the following:
1.
B.
Pipe, tube, fittings, and joining materials.
Protective pipe and fitting coating.
Piping specialties.
Specialty valves.
Service meters (by local gas co., located outside of building).
Pressure regulators 1st and 2nd stage regulators (by local gas co., located
outside of building).
Specialty valves. Include pressure rating, capacity, settings, and electrical
connection data of selected models.
Shop Drawings: For fuel gas piping. Include plans and attachments to other work.
1.
Wiring Diagrams: Power, signal, and control wiring.
C.
Welding certificates.
D.
Field quality-control test reports.
E.
Operation and Maintenance Data: For natural gas specialties and accessories to
include in emergency, operation, and maintenance manuals.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.4
231115-2
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
QUALITY ASSURANCE
A.
Welding: Qualify processes and operators according to ASME Boiler and Pressure
Vessel Code: Section IX.
B.
Electrical Components and Devices: Listed and labeled as defined in NFPA 70,
Article 100, by a testing agency acceptable to authorities having jurisdiction, and
marked for intended use.
1.5
A.
DELIVERY, STORAGE, AND HANDLING
Handling Flammable Liquids: Remove and legally dispose of liquids from drips in
existing gas piping. Handle cautiously to avoid spillage and ignition. Notify fuel gas
supplier. Handle flammable liquids used by Installer with proper precautions and do
not leave on premises from end of one day to beginning of next day.
PART 2 - PRODUCTS
2.1
A.
MANUFACTURERS
In other Part 2 articles where titles below introduce lists, the following requirements
apply to product selection:
1.
2.
2.2
A.
2.3
A.
Available Manufacturers:
Subject to compliance with requirements,
manufacturers offering products that may be incorporated into the Work include
manufacturers specified.
Manufacturers: Subject to compliance with requirements, provide products by
one of the manufacturers specified.
PIPING MATERIALS
Refer to Part 3 "Piping Applications" Article for applications of pipe, tube, fitting, and
joining materials.
PIPES, TUBES, FITTINGS, AND JOINING MATERIALS
Steel Pipe: ASTM A 53/A 53M; Type E or S; Grade B; black.
wrought-steel pipe shall comply with ASME B36.10M.
1.
2.
3.
Wall thickness of
Malleable-Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern,
with threaded ends according to ASME B1.20.1.
Steel Threaded Fittings: ASME B16.11, forged steel with threaded ends
according to ASME B1.20.1.
Steel Welding Fittings: ASME B16.9, wrought steel or ASME B16.11, forged
steel.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
4.
5.
6.
7.
8.
B.
3.
4.
A.
2.5
Unions: ASME B16.39, Class 150, malleable iron with brass-to-iron seat, ground
joint, and threaded ends according to ASME B1.20.1.
Cast-Iron Flanges and Flanged Fittings: ASME B16.1, Class 125.
Joint Compound and Tape: Suitable for natural gas.
Steel Flanges and Flanged Fittings: ASME B16.5.
Gasket Material: Thickness, material, and type suitable for natural gas.
Hard Copper Tube: ASTM B 88, Type L (ASTM B 88M, Type B), drawn temper.
1.
2.
2.4
231115-3
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
Copper Fittings: ASME B16.22, wrought copper, streamlined pattern.
Brazing Filler Metals: AWS A5.8, Silver Classification BAg-1. Filler metal
containing phosphorus is prohibited.
Bronze Flanges and Flanged Fittings: ASME B16.24, Class 150.
Gasket Material: Thickness, material, and type suitable for natural gas.
PROTECTIVE COATING
Furnish pipe and fittings with factory-applied, corrosion-resistant polyethylene coating
for use in contact with materials that may corrode the pipe.
PIPING SPECIALTIES
A.
Flexible Connectors: ANSI Z21.24, copper alloy.
B.
Quick-Disconnect Devices:
connector.
2.6
ANSI Z21.41, convenience outlets and matching plug
SPECIALTY VALVES
A.
Valves, NPS 2 and Smaller:
threads.
B.
Valves, NPS 2-1/2 and Larger: Flanged ends according to ASME B16.5 for steel
flanges and according to ASME B16.24 for copper and copper-alloy flanges.
C.
Appliance Connector Valves: ANSI Z21.15 and CSA International listed.
1.
Manufacturers:
a.
b.
c.
d.
e.
D.
Threaded ends according to ASME B1.20.1 for pipe
American Valve Inc.
Conbraco Industries, Inc.; Apollo Div.
Legend Valve and Fitting, Inc.
Mueller Co.; Mueller Gas Products Div.
Watts Industries, Inc.; Water Products Div.
Gas Stops: Bronze body with AGA stamp, plug type with bronze plug and flat or
square head, ball type with chrome-plated brass ball and lever handle, or butterfly
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
231115-4
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
valve with stainless-steel disc and fluorocarbon elastomer seal and lever handle; 2-psig
minimum pressure rating.
E.
Gas Valves, NPS 2 and Smaller: ASME B16.33 and CSA International-listed bronze
body and 125-psig pressure rating.
1.
Manufacturers:
a.
b.
c.
d.
e.
f.
g.
h.
2.
F.
Tamperproof Feature: Include design for locking.
Plug Valves, NPS 2-1/2 and Larger: ASME B16.38 and MSS SP-78 cast-iron,
lubricated plug valves, with 125-psig pressure rating.
1.
Manufacturers:
a.
b.
c.
2.
G.
Flow Control Equipment, Inc.
Grinnell Corp.
Legend Valve and Fitting, Inc.
Milwaukee Valve Company.
Mueller Co.; Mueller Gas Products Div.
NIBCO INC.
Red-White Valve Corp.
Watts Industries, Inc.; Water Products Div.
Flow Control Equipment, Inc.
Nordstrom Valves, Inc.
Olson Technologies, Inc.; Homestead Valve Div.
Tamperproof Feature: Include design for locking.
General-Duty Valves, NPS 2-1/2 and Larger: ASME B16.38, cast-iron body, suitable
for fuel gas service, with "WOG" indicated on valve body, and 125-psig pressure
rating.
1.
2.
Gate Valves: MSS SP-70, OS&Y type with solid wedge.
Butterfly Valves: MSS SP-67, lug type with lever handle.
PART 3 - EXECUTION
3.1
A.
EXAMINATION
Examine roughing-in for propane gas piping system to verify actual locations of piping
connections before equipment installation.
1.
Proceed with installation only after unsatisfactory conditions have been
corrected.
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HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.2
A.
3.3
231115-5
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
PREPARATION
Inspect natural-gas piping according to NFPA 54 and the International Fuel Gas Code
with Texas Modifications to determine that natural-gas utilization devices are turned off
in piping section affected.
VALVE APPLICATIONS
A.
Piping Line Valves, NPS 2 and Smaller: Gas valve.
B.
Piping Line Valves, NPS 2-1/2 and Larger: Plug valve or general-duty valve.
C.
Valves at Service Meter, NPS 2 and Smaller: Gas valve.
D.
Valves at Service Meter, NPS 2-1/2 and Larger: Plug valve.
3.4
PIPING INSTALLATION
A.
Basic piping installation requirements are specified in Division 15 Section "Basic
Mechanical Materials and Methods."
B.
Concealed Locations: Except as specified below, install concealed gas piping in
airtight conduit constructed of Schedule 40, seamless, black steel pipe with welded
joints. Vent conduit to outside and terminate with screened vent cap.
1.
2.
Above-Ceiling Locations: Gas piping may be installed in accessible spaces,
subject to approval of authorities having jurisdiction, whether or not such spaces
are used as plenums. Do not locate valves above ceilings.
In Partitions: Do not install concealed piping in solid partitions. Protect tubing
from physical damage when installed inside partitions or hollow walls.
a.
3.
4.
In Walls: Gas piping with welded joints and protective wrapping specified in
Part 2 "Protective Coating" Article may be installed in masonry walls, subject to
approval of authorities having jurisdiction.
Prohibited Locations: Do not install gas piping in or through circulating air ducts,
clothes or trash chutes, chimneys or gas vents (flues), ventilating ducts, or
dumbwaiter or elevator shafts.
a.
C.
Exception: Tubing passing through partitions or walls.
Exception: Accessible above-ceiling space specified above.
Drips and Sediment Traps: Install drips at points where condensate may collect.
Include outlets of service meters. Locate where readily accessible for cleaning and
emptying. Do not install where condensate would be subject to freezing.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
231115-6
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
Construct drips and sediment traps using tee fitting with bottom outlet plugged or
capped. Use minimum-length nipple of 3 pipe diameters, but not less than 3
inches (75 mm) long, and same size as connected pipe. Install with space
between bottom of drip and floor for removal of plug or cap.
D.
Conceal pipe installations in walls, pipe spaces, utility spaces, above ceilings, below
grade or floors, and in floor channels, unless indicated to be exposed to view.
E.
Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level
side down.
F.
Connect branch piping from top or side of horizontal piping.
G.
Install unions in pipes NPS 2 and smaller, adjacent to each valve, at final connection to
each piece of equipment, and elsewhere as indicated. Unions are not required on
flanged devices.
H.
Install strainer on inlet of each line pressure regulator and automatic and electrically
operated valve.
I.
Install pressure gage upstream and downstream from each line pressure regulator.
Pressure gages are specified in Division 15 Section "Meters and Gages."
J.
Install flanges on valves, specialties, and equipment having NPS 2-1/2 and larger
connections.
K.
Install vent piping for gas pressure regulators and gas trains, extend outside building,
and vent to atmosphere. Terminate vents with turned-down, reducing-elbow fittings
with corrosion-resistant insect screens in large end.
L.
Install containment conduits for gas piping below slabs, within building, in gastight
conduits extending minimum of 4 inches outside building, and vented to atmosphere.
Terminate vents with turned-down, reducing-elbow fittings with corrosion-resistant
insect screens in large end. Prepare and paint outside of conduits with coal-tar, epoxypolyamide paint according to SSPC-Paint 16.
3.5
JOINT CONSTRUCTION
A.
Basic piping joint construction is specified in Division 15 Section "Basic Mechanical
Materials and Methods."
B.
Patch factory-applied protective coating as recommended by manufacturer at field
welds and where damage to coating occurs during construction.
3.6
A.
HANGER AND SUPPORT INSTALLATION
Pipe hanger and support and equipment support materials and installation
requirements are specified in Division 15 Section "Hangers and Supports."
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
B.
Install hangers for horizontal steel piping with the following maximum spacing and
minimum rod sizes:
1.
2.
3.
4.
3.7
231115-7
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
NPS 1 and Smaller: Maximum span, 96 inches ; minimum rod size, 3/8 inch .
NPS 1-1/4 : Maximum span, 108 inches ; minimum rod size, 3/8 inch .
NPS 1-1/2 and NPS 2 : Maximum span, 108 inches ; minimum rod size, 3/8 inch
NPS 2-1/2 to NPS 3-1/2 : Maximum span, 10 feet; minimum rod size, 1/2 inch .
NPS 4 and Larger: Maximum span, 10 feet ; minimum rod size, 5/8 inch .
CONNECTIONS
A.
Drawings indicate general arrangement of fuel gas piping, fittings, and specialties.
B.
Install piping adjacent to appliances to allow service and maintenance.
C.
Connect piping to appliances using gas with shutoff valves and unions. Install valve
upstream from and within 72 inches of each appliance. Install union downstream from
valve.
D.
Sediment Traps: Install tee fitting with capped nipple in bottom to form drip, as close
as practical to inlet of each appliance using gas.
E.
Ground equipment according to Division 16 Section "Grounding and Bonding."
1.
F.
3.8
A.
Connect wiring according to Division 16 Section "Conductors and Cables."
LABELING AND IDENTIFYING
Equipment Nameplates and Signs: Install engraved plastic-laminate equipment
nameplate or sign on or near each service meter, pressure regulator, and specialty
valve.
1.
2.
3.9
Do not use gas pipe as grounding electrode.
Text: In addition to name of identified unit, distinguish between multiple units,
inform operator of operational requirements, indicate safety and emergency
precautions, and warn of hazards and improper operations.
Nameplates, pipe identification, and signs are specified in Division 15 Section
"Mechanical Identification."
PAINTING
A.
Use materials and procedures in Division 9 painting Sections.
B.
Paint exterior service meters, pressure regulators, and specialty valves.
1.
Color: Gray
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HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.10
231115-8
FUEL GAS SYSTEMS
NOVEMBER 24, 2015
FIELD QUALITY CONTROL
A.
Test, inspect, and purge piping according to NFPA 54 and requirements of authorities
having jurisdiction.
B.
Repair leaks and defects with new materials and retest system until satisfactory results
are obtained.
C.
Verify capacities and pressure ratings of service meters, pressure regulators, valves,
and specialties.
D.
Verify correct pressure settings for pressure regulators.
E.
Verify that specified piping tests are complete.
END OF SECTION 231115
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
232300-1
REFRIGERANT PIPING
NOVEMBER 24, 2015
SECTION 232300 - REFRIGERANT PIPING
PART 1 - GENERAL
1.1
A.
1.2
A.
1.3
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 01 Specification Sections, apply to this
Section.
SUMMARY
This Section includes refrigerant piping used for air-conditioning applications.
PERFORMANCE REQUIREMENTS
Line Test Pressure for Refrigerant R-134a:
1.
2.
3.
B.
Line Test Pressure for Refrigerant R-410A:
1.
2.
3.
1.4
A.
Product Data: For each type of valve and refrigerant piping specialty indicated.
Include pressure drop, based on manufacturer's test data, for the following:
Thermostatic expansion valves.
Solenoid valves.
Hot-gas bypass valves.
Filter dryers.
Strainers.
Pressure-regulating valves.
Shop Drawings: Show layout of refrigerant piping and specialties, including pipe,
tube, and fitting sizes, flow capacities, valve arrangements and locations, slopes
of horizontal runs, oil traps, double risers, wall and floor penetrations, and
equipment connection details. Show interface and spatial relationships between
piping and equipment.
1.
C
Suction Lines for Air-Conditioning Applications: 300 psig.
Suction Lines for Heat-Pump Applications: 535 psig.
Hot-Gas and Liquid Lines: 535 psig.
SUBMITTALS
1.
2.
3.
4.
5.
6.
B.
Suction Lines for Air-Conditioning Applications: 115 psig.
Suction Lines for Heat-Pump Applications: 225 psig.
Hot-Gas and Liquid Lines: 225 psig.
Shop Drawing Scale: 1/4 inch equals 1 foot.
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HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
232300-2
REFRIGERANT PIPING
NOVEMBER 24, 2015
Refrigerant piping indicated on Drawings is schematic only. Size piping
and design actual piping layout, including oil traps, double risers,
specialties, and pipe and tube sizes to accommodate, as a minimum,
equipment provided, elevation difference between compressor and
evaporator, and length of piping to ensure proper operation and
compliance with warranties of connected equipment.
C.
Welding certificates.
D.
Field quality-control test reports.
E.
Operation and Maintenance Data: For refrigerant valves and piping specialties
to include in maintenance manuals.
1.5
QUALITY ASSURANCE
A.
Welding: Qualify procedures and personnel according to ASME Boiler and
Pressure Vessel Code: Section IX, "Welding and Brazing Qualifications."
B.
Comply with ASHRAE 15, "Safety Code for Refrigeration Systems."
C.
Comply with
Components."
1.6
A.
ASME B31.5,
"Refrigeration
Piping
and
Heat
Transfer
PRODUCT STORAGE AND HANDLING
Store piping in a clean and protected area with end caps in place to ensure that
piping interior and exterior are clean when installed.
PART 2 - PRODUCTS
2.1
COPPER TUBE AND FITTINGS
A.
Copper Tube: ASTM B 88, Type K or L or ASTM B 280, Type ACR.
B.
Wrought-Copper Fittings: ASME B16.22.
C.
Wrought-Copper Unions: ASME B16.22.
D.
Solder Filler Metals: ASTM B 32. Use 95-5 tin antimony or alloy HB solder to
join copper socket fittings on copper pipe.
E.
Brazing Filler Metals: AWS A5.8.
F.
Flexible Connectors:
1.
2.
C
Body:
Tin-bronze bellows with woven, flexible, tinned-bronze-wirereinforced protective jacket.
End Connections: Socket ends.
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HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
2.2
A.
Diaphragm Packless Valves:
2.
3.
4.
5.
6.
7.
3.
4.
5.
6.
7.
8.
9.
Body: Ductile iron, forged brass, or cast bronze; globe pattern.
Bonnet: Bolted ductile iron, forged brass, or cast bronze; or brass hex
plug.
Piston: Removable polytetrafluoroethylene seat.
Closing Spring: Stainless steel.
Manual Opening Stem: Seal cap, plated-steel stem, and graphite seal.
End Connections: Socket, union, threaded, or flanged.
Maximum Opening Pressure: 0.50 psig.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 275 deg F.
Service Valves:
1.
2.
3.
4.
5.
C
Body and Bonnet: Forged brass or cast bronze.
Packing: Molded stem, back seating, and replaceable under pressure.
Operator: Rising stem.
Seat: Nonrotating, self-aligning polytetrafluoroethylene.
Seal Cap: Forged-brass or valox hex cap.
End Connections: Socket, union, threaded, or flanged.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 275 deg F.
Check Valves:
1.
2.
D.
Body and Bonnet: Forged brass or cast bronze; globe design with straightthrough or angle pattern.
Diaphragm: Phosphor bronze and stainless steel with stainless-steel
spring.
Operator: Rising stem and hand wheel.
Seat: Nylon.
End Connections: Socket, union, or flanged.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 275 deg F.
Packed-Angle Valves:
1.
2.
3.
4.
5.
6.
7.
8.
C.
Offset Performance: Capable of minimum 3/4-inch (20-mm) misalignment
in minimum 7-inch- (180-mm-) long assembly.
Pressure Rating: Factory test at minimum 500 psig (3450 kPa).
Maximum Operating Temperature: 250 deg F (121 deg C).
VALVES AND SPECIALTIES
1.
B.
232300-3
REFRIGERANT PIPING
NOVEMBER 24, 2015
Body: Forged brass with brass cap including key end to remove core.
Core: Removable ball-type check valve with stainless-steel spring.
Seat: Polytetrafluoroethylene.
End Connections: Copper spring.
Working Pressure Rating: 500 psig.
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PRAXIS3 ARCHITECTURE CORP-15155
E.
Solenoid Valves: Comply with ARI 760 and UL 429; listed and labeled by an
NRTL.
1.
2.
3.
4.
5.
6.
7.
8.
F.
3.
4.
5.
6.
7.
Body: Forged brass.
Window: Replaceable, clear, fused glass window with indicating element
protected by filter screen.
Indicator: Color coded to show moisture content in ppm.
Minimum Moisture Indicator Sensitivity: Indicate moisture above 60 ppm.
End Connections: Socket or flare.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 240 deg F.
Replaceable-Core Filter Dryers: Comply with ARI 730.
1.
2.
C
Body, Bonnet, and Seal Cap: Forged brass or steel.
Diaphragm, Piston, Closing Spring, and Seat Insert: Stainless steel.
Packing and Gaskets: Non-asbestos.
Capillary and Bulb: Copper tubing filled with refrigerant charge.
Suction Temperature: 40 deg F.
Superheat: Adjustable or Nonadjustable.
Reverse-flow option (for heat-pump applications).
End Connections: Socket, flare, or threaded union.
Working Pressure Rating: 450 psig.
Moisture/Liquid Indicators:
1.
2.
I.
Body and Bonnet: Ductile iron and steel, with neoprene O-ring seal.
Piston, Closing Spring, and Seat Insert: Stainless steel.
Seat Disc: Polytetrafluoroethylene.
End Connections: Threaded.
Working Pressure Rating: 400 psig.
Maximum Operating Temperature: 240 deg F.
Thermostatic Expansion Valves: Comply with ARI 750.
1.
2.
3.
4.
5.
6.
7.
8.
9.
H.
Body and Bonnet: Plated steel.
Solenoid Tube, Plunger, Closing Spring, and Seat Orifice: Stainless steel.
Seat: Polytetrafluoroethylene.
End Connections: Threaded.
Electrical: Molded, watertight coil in NEMA 250 enclosure of type required
by location with 1/2-inch conduit adapter, and 24 or 115 or 208-V ac coil.
Working Pressure Rating: 400 psig.
Maximum Operating Temperature: 240 deg F.
Manual operator.
Safety Relief Valves: Comply with ASME Boiler and Pressure Vessel Code;
listed and labeled by an NRTL.
1.
2.
3.
4.
5.
6.
G.
232300-4
REFRIGERANT PIPING
NOVEMBER 24, 2015
Body and Cover: Painted-steel shell with ductile-iron cover, stainless-steel
screws, and neoprene gaskets.
Filter Media: 10 micron, pleated with integral end rings; stainless-steel
support.
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HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
6.
7.
8.
9.
J.
3.
4.
5.
6.
7.
8.
9.
2.
3.
4.
5.
6.
7.
Comply with ASME Boiler and Pressure Vessel Code; listed and labeled by
an NRTL.
Comply with UL 207; listed and labeled by an NRTL.
Body: Welded steel with corrosion-resistant coating.
Tappings: Inlet, outlet, liquid level indicator, and safety relief valve.
End Connections: Socket or threaded.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 275 deg F.
Liquid Accumulators: Comply with ARI 495.
1.
2.
3.
4.
C
Body: Welded steel with corrosion-resistant coating.
End Connections: Socket or flare.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 275 deg F.
Receivers: Comply with ARI 495.
1.
M.
Body and Cover: Painted-steel shell.
Filter Media: 10 micron, pleated with integral end rings; stainless-steel
support.
Desiccant Media: Activated alumina or charcoal.
Designed for reverse flow (for heat-pump applications).
End Connections: Socket.
Access Ports: NPS 1/4 connections at entering and leaving sides for
pressure differential measurement.
Maximum Pressure Loss: 2 psig.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 240 deg F.
Mufflers:
1.
2.
3.
4.
L.
Desiccant Media: Activated alumina or charcoal.
Designed for reverse flow (for heat-pump applications).
End Connections: Socket.
Access Ports: NPS 1/4 connections at entering and leaving sides for
pressure differential measurement.
Maximum Pressure Loss: 2 psig.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 240 deg F.
Permanent Filter Dryers: Comply with ARI 730.
1.
2.
K.
232300-5
REFRIGERANT PIPING
NOVEMBER 24, 2015
Body: Welded steel with corrosion-resistant coating.
End Connections: Socket or threaded.
Working Pressure Rating: 500 psig.
Maximum Operating Temperature: 275 deg F.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.3
232300-6
REFRIGERANT PIPING
NOVEMBER 24, 2015
REFRIGERANTS
A.
Available Manufacturers:
Subject to compliance with requirements,
manufacturers offering products that may be incorporated into the Work include,
but are not limited to, the following:
B.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
1.
2.
3.
4.
5.
Atofina Chemicals, Inc.
DuPont Company; Fluorochemicals Div.
Honeywell, Inc.; Genetron Refrigerants.
INEOS Fluor Americas LLC.
<Insert manufacturer's name.>
C.
ASHRAE 34, R-134a: Tetrafluoroethane.
D.
ASHRAE 34, R-407C: Difluoromethane / Pentafluoroethane / 1,1,1,2Tetrafluoroethane.
E.
ASHRAE 34, R-410A: Pentafluoroethane/Difluoromethane.
PART 3 - EXECUTION
3.1
PIPING APPLICATIONS
A.
Suction Lines NPS 1-1/2 and Smaller for Conventional Air-Conditioning
Applications: Copper, Type ACR, annealed-temper tubing and wrought-copper
fittings with brazed joints.
B.
Hot-Gas and Liquid Lines and Suction Lines for Heat-Pump Applications:
1.
C.
3.2
C
NPS 1-1/2 and Smaller: Copper, Type ACR, annealed-temper tubing and
wrought-copper fittings with brazed joints.
Safety-Relief-Valve Discharge Piping: Copper, Type K, drawn-temper tubing
and wrought-copper fittings with soldered joints.
VALVE AND SPECIALTY APPLICATIONS
A.
Install diaphragm packless valves in suction and discharge lines of compressor.
B.
Install service valves for gage taps at inlet and outlet of hot-gas bypass valves
and strainers if they are not an integral part of valves and strainers.
C.
Install a check valve at the compressor discharge and a liquid accumulator at the
compressor suction connection.
D.
Except as otherwise indicated, install diaphragm packless valves on inlet and
outlet side of filter dryers.
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PRAXIS3 ARCHITECTURE CORP-15155
E.
Install a full-sized, three-valve bypass around filter dryers.
F.
Install solenoid valves upstream from each expansion valve and hot-gas bypass
valve. Install solenoid valves in horizontal lines with coil at top.
G.
Install thermostatic expansion valves as close as possible to distributors on
evaporators.
1.
2.
3.
Install valve so diaphragm case is warmer than bulb.
Secure bulb to clean, straight, horizontal section of suction line using two
bulb straps. Do not mount bulb in a trap or at bottom of the line.
If external equalizer lines are required, make connection where it will
reflect suction-line pressure at bulb location.
H.
Install safety relief valves where required by ASME Boiler and Pressure Vessel
Code.
Pipe safety-relief-valve discharge line to outside according to
ASHRAE 15.
I.
Install moisture/liquid indicators in liquid line at the inlet of the thermostatic
expansion valve or at the inlet of the evaporator coil capillary tube.
J.
Install strainers upstream from and adjacent to the following unless they are
furnished as an integral assembly for device being protected:
1.
2.
3.
4.
Solenoid valves.
Thermostatic expansion valves.
Hot-gas bypass valves.
Compressor.
K.
Install filter dryers in liquid line between compressor and thermostatic expansion
valve.
L.
Install receivers sized to accommodate pump-down charge.
M.
Install flexible connectors at compressors.
3.3
C
232300-7
REFRIGERANT PIPING
NOVEMBER 24, 2015
PIPING INSTALLATION
A.
Drawing plans, schematics, and diagrams indicate general location and
arrangement of piping systems; indicated locations and arrangements were used
to size pipe and calculate friction loss, expansion, pump sizing, and other design
considerations. Install piping as indicated unless deviations to layout are
approved on Shop Drawings.
B.
Install refrigerant piping according to ASHRAE 15.
C.
Install piping in concealed locations unless otherwise indicated and except in
equipment rooms and service areas.
D.
Install piping indicated to be exposed and piping in equipment rooms and service
areas at right angles or parallel to building walls. Diagonal runs are prohibited
unless specifically indicated otherwise.
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PRAXIS3 ARCHITECTURE CORP-15155
E.
Install piping above accessible ceilings to allow sufficient space for ceiling panel
removal.
F.
Install piping adjacent to machines to allow service and maintenance.
G.
Install piping free of sags and bends.
H.
Install fittings for changes in direction and branch connections.
I.
Select system components with pressure rating equal to or greater than system
operating pressure.
J.
Refer to Division 23 Sections "Instrumentation and Control for HVAC" and
"Sequence of Operation" for solenoid valve controllers, control wiring, and
sequence of operation.
K.
Install piping as short and direct as possible, with a minimum number of joints,
elbows, and fittings.
L.
Arrange piping to allow inspection and service of refrigeration equipment. Install
valves and specialties in accessible locations to allow for service and inspection.
Install access doors or panels as specified in Division 08 Section "Access Doors
and Frames" if valves or equipment requiring maintenance is concealed behind
finished surfaces.
M.
Install refrigerant piping in protective conduit where installed belowground.
N.
Install refrigerant piping in rigid or flexible conduit in locations where exposed to
mechanical injury.
O.
Slope refrigerant piping as follows:
1.
2.
3.
4.
C
232300-8
REFRIGERANT PIPING
NOVEMBER 24, 2015
Install horizontal hot-gas discharge piping with a uniform slope downward
away from compressor.
Install horizontal suction lines with a uniform slope downward to
compressor.
Install traps and double risers to entrain oil in vertical runs.
Liquid lines may be installed level.
P.
When brazing or soldering, remove solenoid-valve coils and sight glasses; also
remove valve stems, seats, and packing, and accessible internal parts of
refrigerant specialties. Do not apply heat near expansion-valve bulb.
Q.
Install pipe sleeves at penetrations in exterior walls and floor assemblies.
R.
Seal penetrations through fire and smoke barriers according to Division 07
Section "Penetration Firestopping."
S.
Install piping with adequate clearance between pipe and adjacent walls and
hangers or between pipes for insulation installation.
T.
Install sleeves through floors, walls, or ceilings, sized to permit installation of fullthickness insulation.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
U.
Seal pipe penetrations through exterior walls according to Division 07 Section
"Joint Sealants" for materials and methods.
V.
Identify refrigerant piping and valves according to Division 23 Section
"Identification for HVAC Piping and Equipment."
3.4
PIPE JOINT CONSTRUCTION
A.
Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings
before assembly.
B.
Fill pipe and fittings with an inert gas (nitrogen or carbon dioxide), during brazing
or welding, to prevent scale formation.
C.
Soldered Joints: Construct joints according to ASTM B 828 or CDA's "Copper
Tube Handbook."
D.
Brazed Joints: Construct joints according to AWS's "Brazing Handbook,"
Chapter "Pipe and Tube."
1.
2.
E.
3.5
Use Type BcuP, copper-phosphorus alloy for joining copper socket fittings
with copper pipe.
Use Type BAg, cadmium-free silver alloy for joining copper with bronze or
steel.
Flanged Joints: Select appropriate gasket material, size, type, and thickness for
service application. Install gasket concentrically positioned. Use suitable
lubricants on bolt threads.
HANGERS AND SUPPORTS
A.
Hanger, support, and anchor products are specified in Division 23 Section
"Hangers and Supports for HVAC Piping and Equipment."
B.
Install the following pipe attachments:
1.
2.
3.
4.
5.
C.
Adjustable steel clevis hangers for individual horizontal runs less than 20
feet long.
Roller hangers and spring hangers for individual horizontal runs 20 feet or
longer.
Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet or
longer, supported on a trapeze.
Spring hangers to support vertical runs.
Copper-clad hangers and supports for hangers and supports in direct
contact with copper pipe.
Install hangers for copper tubing with the following maximum spacing and
minimum rod sizes:
1.
2.
C
232300-9
REFRIGERANT PIPING
NOVEMBER 24, 2015
NPS 1/2: Maximum span, 60 inches; minimum rod size, 1/4 inch.
NPS 5/8: Maximum span, 60 inches; minimum rod size, 1/4 inch.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
3.6
NPS 1: Maximum span, 72 inches; minimum rod size, 1/4 inch.
NPS 1-1/4: Maximum span, 96 inches; minimum rod size, 3/8 inch.
NPS 1-1/2: Maximum span, 96 inches; minimum rod size, 3/8 inch.
FIELD QUALITY CONTROL
A.
Perform tests and inspections and prepare test reports.
B.
Tests and Inspections:
1.
2.
3.
Comply with ASME B31.5, Chapter VI.
Test refrigerant piping, specialties, and receivers. Isolate compressor,
condenser, evaporator, and safety devices from test pressure if they are
not rated above the test pressure.
Test high- and low-pressure side piping of each system separately at not
less than the pressures indicated in Part 1 "Performance Requirements"
Article.
a.
b.
c.
d.
3.7
A.
Charge system using the following procedures:
3.
4.
Install core in filter dryers after leak test but before evacuation.
Evacuate entire refrigerant system with a vacuum pump to 500
micrometers. If vacuum holds for 12 hours, system is ready for charging.
Break vacuum with refrigerant gas, allowing pressure to build up to 2 psig.
Charge system with a new filter-dryer core in charging line.
ADJUSTING
A.
Adjust thermostatic expansion valve to obtain proper evaporator superheat.
B.
Adjust high- and low-pressure switch settings to avoid short cycling in response
to fluctuating suction pressure.
C.
Adjust set-point temperature of air-conditioning or chilled-water controllers to the
system design temperature.
D.
Perform the following adjustments before operating the refrigeration system,
according to manufacturer's written instructions:
1.
C
Fill system with nitrogen to the required test pressure.
System shall maintain test pressure at the manifold gage throughout
duration of test.
Test joints and fittings with electronic leak detector or by brushing a
small amount of soap and glycerin solution over joints.
Remake leaking joints using new materials, and retest until
satisfactory results are achieved.
SYSTEM CHARGING
1.
2.
3.8
232300-10
REFRIGERANT PIPING
NOVEMBER 24, 2015
Open shutoff valves in condenser water circuit.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
4.
5.
E.
Verify that compressor oil level is correct.
Open compressor suction and discharge valves.
Open refrigerant valves except bypass valves that are used for other
purposes.
Check open compressor-motor alignment and verify lubrication for motors
and bearings.
Replace core of replaceable filter dryer after system has been adjusted and after
design flow rates and pressures are established.
END OF SECTION 232300
C
232300-11
REFRIGERANT PIPING
NOVEMBER 24, 2015
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233113-1
METAL DUCTS
NOVEMBER 24, 2015
SECTION 233113 - METAL DUCTS
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 01 Specification Sections, apply to this
Section.
SUMMARY
Section Includes:
1.
2.
3.
B.
Related Sections:
1.
2.
3.
1.3
Single-wall rectangular ducts and fittings.
Single-wall round ducts and fittings.
Duct liner.
Division 23 Section "Testing, Adjusting, and Balancing for HVAC" for
testing, adjusting, and balancing requirements for metal ducts.
Division 23 Section "Nonmetal Ducts" for fibrous-glass ducts, thermoset
fiber-reinforced plastic ducts, thermoplastic ducts, PVC ducts, and
concrete ducts.
Division 23 Section "Air Duct Accessories" for dampers, sound-control
devices, duct-mounting access doors and panels, turning vanes, and
flexible ducts.
PERFORMANCE REQUIREMENTS
A.
Delegated Duct Design: Duct construction, including sheet metal thicknesses,
seam and joint construction, reinforcements, and hangers and supports, shall
comply with SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible" and performance requirements and design criteria indicated in "Duct
Schedule" Article.
B.
Structural Performance: Duct hangers and supports shall withstand the effects
of gravity loads and stresses within limits and under conditions described in
SMACNA's "HVAC Duct Construction Standards - Metal and Flexible".
C.
Airstream Surfaces: Surfaces in contact with the airstream shall comply with
requirements in ASHRAE 62.1-2004.
1.4
A.
SUBMITTALS
Product Data: For each type of the following products:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
B.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Fabrication, assembly, and installation, including plans, elevations,
sections, components, and attachments to other work.
Factory- and shop-fabricated ducts and fittings.
Duct layout indicating sizes, configuration, liner material, and staticpressure classes.
Elevation of top of ducts.
Dimensions of main duct runs from building grid lines.
Fittings.
Reinforcement and spacing.
Seam and joint construction.
Penetrations through fire-rated and other partitions.
Equipment installation based on equipment being used on Project.
Locations for duct accessories, including dampers, turning vanes, and
access doors and panels.
Hangers and supports, including methods for duct and building
attachment and vibration isolation.
Delegated-Design Submittal:
1.
2.
3.
4.
5.
D.
Liners and adhesives.
Sealants and gaskets.
Shop Drawings:
1.
C.
233113-2
METAL DUCTS
NOVEMBER 24, 2015
Sheet metal thicknesses.
Joint and seam construction and sealing.
Reinforcement details and spacing.
Materials, fabrication, assembly, and spacing of hangers and supports.
Design Calculations: Calculations for selecting hangers and supports.
Coordination Drawings: Plans, drawn to scale, on which the following items are
shown and coordinated with each other, using input from installers of the items
involved:
1.
2.
3.
4.
5.
6.
Duct installation in congested spaces, indicating coordination with general
construction, building components, and other building services. Indicate
proposed changes to duct layout.
Suspended ceiling components.
Structural members to which duct will be attached.
Size and location of initial access modules for acoustical tile.
Penetrations of smoke barriers and fire-rated construction.
Items penetrating finished ceiling including the following:
a.
b.
c.
d.
e.
f.
Lighting fixtures.
Air outlets and inlets.
Speakers.
Sprinklers.
Access panels.
Perimeter moldings.
E.
Welding certificates.
F.
Field quality-control reports.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.5
233113-3
METAL DUCTS
NOVEMBER 24, 2015
QUALITY ASSURANCE
A.
Welding Qualifications:
Qualify procedures and personnel according to
AWS D1.1/D1.1M, "Structural Welding Code - Steel," for hangers and supports.
AWS D1.2/D1.2M, "Structural Welding Code - Aluminum," for aluminum
supports. AWS D9.1M/D9.1, "Sheet Metal Welding Code," for duct joint and
seam welding.
B.
Welding Qualifications:
following:
1.
2.
Qualify procedures and personnel according to the
AWS D1.1/D1.1M, "Structural Welding Code - Steel," for hangers and
supports.
AWS D9.1M/D9.1, "Sheet Metal Welding Code," for duct joint and seam
welding.
C.
ASHRAE Compliance:
Applicable requirements in ASHRAE 62.1-2004,
Section 5 - "Systems and Equipment" and Section 7 - "Construction and
System Start-Up."
D.
ASHRAE/IESNA
Compliance:
Applicable
requirements
in
ASHRAE/IESNA 90.1-2004, Section 6.4.4 - "HVAC System Construction and
Insulation."
PART 2 - PRODUCTS
2.1
SINGLE-WALL RECTANGULAR DUCTS AND FITTINGS
A.
General Fabrication Requirements: Comply with SMACNA's "HVAC Duct
Construction Standards - Metal and Flexible" based on indicated static-pressure
class unless otherwise indicated.
B.
Transverse Joints: Select joint types and fabricate according to SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible," Figure 1-4,
"Transverse (Girth) Joints," for static-pressure class, applicable sealing
requirements, materials involved, duct-support intervals, and other provisions in
SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."
C.
Longitudinal Seams: Select seam types and fabricate according to SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible," Figure 1-5,
"Longitudinal Seams - Rectangular Ducts," for static-pressure class, applicable
sealing requirements, materials involved, duct-support intervals, and other
provisions in SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible."
D.
Elbows, Transitions, Offsets, Branch Connections, and Other Duct
Construction: Select types and fabricate according to SMACNA's "HVAC Duct
Construction Standards - Metal and Flexible," Chapter 2, "Fittings and Other
Construction," for static-pressure class, applicable sealing requirements,
materials involved, duct-support intervals, and other provisions in SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible."
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.2
A.
SINGLE-WALL ROUND DUCTS AND FITTINGS
General Fabrication Requirements: Comply with SMACNA's "HVAC Duct
Construction Standards - Metal and Flexible," Chapter 3, "Round, Oval, and
Flexible Duct," based on indicated static-pressure class unless otherwise
indicated.
1.
Manufacturers: Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
a.
b.
c.
d.
e.
B.
2.
2.3
Transverse Joints in Ducts Larger Than 60 Inches in Diameter: Flanged.
Longitudinal Seams: Select seam types and fabricate according to SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible," Figure 3-1, "Seams Round Duct and Fittings," for static-pressure class, applicable sealing
requirements, materials involved, duct-support intervals, and other provisions in
SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."
1.
D.
Lindab Inc.
McGill AirFlow LLC.
SEMCO Incorporated.
Sheet Metal Connectors, Inc.
Spiral Manufacturing Co., Inc.
Transverse Joints: Select joint types and fabricate according to SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible," Figure 3-2,
"Transverse Joints - Round Duct," for static-pressure class, applicable sealing
requirements, materials involved, duct-support intervals, and other provisions in
SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."
1.
C.
233113-4
METAL DUCTS
NOVEMBER 24, 2015
Fabricate round ducts larger than 90 inches in diameter with butt-welded
longitudinal seams.
Fabricate flat-oval ducts larger than 72 inches in width (major dimension)
with butt-welded longitudinal seams.
Tees and Laterals: Select types and fabricate according to SMACNA's "HVAC
Duct Construction Standards - Metal and Flexible," Figure 3-4, "90 Degree Tees
and Laterals," and Figure 3-5, "Conical Tees," for static-pressure class,
applicable sealing requirements, materials involved, duct-support intervals, and
other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible."
SHEET METAL MATERIALS
A.
General Material Requirements:
Comply with SMACNA's "HVAC Duct
Construction Standards - Metal and Flexible" for acceptable materials, material
thicknesses, and duct construction methods unless otherwise indicated. Sheet
metal materials shall be free of pitting, seam marks, roller marks, stains,
discolorations, and other imperfections.
B.
Galvanized Sheet Steel: Comply with ASTM A 653/A 653M.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
233113-5
METAL DUCTS
NOVEMBER 24, 2015
Galvanized Coating Designation: G60.
Finishes for Surfaces Exposed to View: Mill phosphatized.
C.
Carbon-Steel Sheets: Comply with ASTM A 1008/A 1008M, with oiled, matte
finish for exposed ducts.
D.
Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 304 or 316,
as indicated in the "Duct Schedule" Article; cold rolled, annealed, sheet.
Exposed surface finish shall be No. 2B, No. 2D, No. 3, or No. 4 as indicated in
the "Duct Schedule" Article.
E.
Aluminum Sheets: Comply with ASTM B 209 Alloy 3003, H14 temper; with mill
finish for concealed ducts, and standard, one-side bright finish for duct surfaces
exposed to view.
F.
Reinforcement Shapes and Plates: ASTM A 36/A 36M, steel plates, shapes,
and bars; black and galvanized.
1.
G.
2.4
A.
Where black- and galvanized-steel shapes and plates are used to
reinforce aluminum ducts, isolate the different metals with butyl rubber,
neoprene, or EPDM gasket materials.
Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches
or less; 3/8-inch minimum diameter for lengths longer than 36 inches.
DUCT LINER
Fibrous-Glass Duct Liner:
Comply with ASTM C 1071, NFPA 90A, or
NFPA 90B; and with NAIMA AH124, "Fibrous Glass Duct Liner Standard."
1.
Manufacturers: Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
a.
b.
c.
d.
2.
Maximum Thermal Conductivity:
a.
b.
3.
4.
CertainTeed Corporation; Insulation Group.
Johns Manville.
Knauf Insulation.
Owens Corning.
Type I, Flexible: 0.27 Btu x in./h x sq. ft. x deg F at 75 deg F mean
temperature.
Type II, Rigid: 0.23 Btu x in./h x sq. ft. x deg F at 75 deg F mean
temperature.
Antimicrobial Erosion-Resistant Coating: Apply to the surface of the liner
that will form the interior surface of the duct to act as a moisture repellent
and erosion-resistant coating. Antimicrobial compound shall be tested for
efficacy by an NRTL and registered by the EPA for use in HVAC systems.
Liner Adhesive:
Comply with NFPA 90A or NFPA 90B and with
ASTM C 916.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
B.
Insulation Pins and Washers:
1.
2.
2.5
233113-6
METAL DUCTS
NOVEMBER 24, 2015
Cupped-Head, Capacitor-Discharge-Weld Pins: Copper- or zinc-coated
steel pin, fully annealed for capacitor-discharge welding, 0.106-inchdiameter shank, length to suit depth of insulation indicated with integral 11/2-inch galvanized carbon-steel washer.
Insulation-Retaining Washers: Self-locking washers formed from 0.016inch-thick galvanized steel; with beveled edge sized as required to hold
insulation securely in place but not less than 1-1/2 inches in diameter.
SEALANT AND GASKETS
A.
General Sealant and Gasket Requirements: Surface-burning characteristics for
sealants and gaskets shall be a maximum flame-spread index of 25 and a
maximum smoke-developed index of 50 when tested according to UL 723;
certified by an NRTL.
B.
Two-Part Tape Sealing System:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
C.
Water-Based Joint and Seam Sealant:
1.
2.
3.
4.
5.
6.
7.
8.
9.
D.
Tape: Woven cotton fiber impregnated with mineral gypsum and modified
acrylic/silicone activator to react exothermically with tape to form hard,
durable, airtight seal.
Tape Width: 3 inches.
Sealant: Modified styrene acrylic.
Water resistant.
Mold and mildew resistant.
Maximum Static-Pressure Class: 10-inch wg, positive and negative.
Service: Indoor and outdoor.
Service Temperature: Minus 40 to plus 200 deg F.
Substrate: Compatible with galvanized sheet steel (both PVC coated and
bare), stainless steel, or aluminum.
For indoor applications, use sealant that has a VOC content of 250 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
Application Method: Brush on.
Solids Content: Minimum 65 percent.
Shore A Hardness: Minimum 20.
Water resistant.
Mold and mildew resistant.
VOC: Maximum 75 g/L (less water).
Maximum Static-Pressure Class: 10-inch wg, positive and negative.
Service: Indoor or outdoor.
Substrate: Compatible with galvanized sheet steel (both PVC coated and
bare), stainless steel, or aluminum sheets.
Solvent-Based Joint and Seam Sealant:
1.
2.
Application Method: Brush on.
Base: Synthetic rubber resin.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
E.
233113-7
METAL DUCTS
NOVEMBER 24, 2015
Solvent: Toluene and heptane.
Solids Content: Minimum 60 percent.
Shore A Hardness: Minimum 60.
Water resistant.
Mold and mildew resistant.
For indoor applications, use sealant that has a VOC content of 250 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
VOC: Maximum 395 g/L.
Maximum Static-Pressure Class: 10-inch wg, positive or negative.
Service: Indoor or outdoor.
Substrate: Compatible with galvanized sheet steel (both PVC coated and
bare), stainless steel, or aluminum sheets.
Flanged Joint Sealant: Comply with ASTM C 920.
1.
2.
3.
4.
5.
6.
General: Single-component, acid-curing, silicone, elastomeric.
Type: S.
Grade: NS.
Class: 25.
Use: O.
For indoor applications, use sealant that has a VOC content of 250 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
F.
Flange Gaskets:
Butyl
polyisobutylene plasticizer.
G.
Round Duct Joint O-Ring Seals:
1.
2.
3.
2.6
rubber,
neoprene,
or
EPDM
polymer
with
Seal shall provide maximum leakage class of 3 cfm/100 sq. ft. at 1-inch
wg and shall be rated for 10-inch wg static-pressure class, positive or
negative.
EPDM O-ring to seal in concave bead in coupling or fitting spigot.
Double-lipped, EPDM O-ring seal, mechanically fastened to factoryfabricated couplings and fitting spigots.
HANGERS AND SUPPORTS
A.
Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and
nuts.
B.
Hanger Rods for Corrosive Environments: Electrogalvanized, all-thread rods or
galvanized rods with threads painted with zinc-chromate primer after
installation.
C.
Strap and Rod Sizes: Comply with SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible," Table 4-1, "Rectangular Duct Hangers
Minimum Size," and Table 4-2, "Minimum Hanger Sizes for Round Duct."
D.
Steel Cables for Galvanized-Steel Ducts:
ASTM A 603.
Galvanized steel complying with
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233113-8
METAL DUCTS
NOVEMBER 24, 2015
E.
Steel Cables for Stainless-Steel Ducts:
ASTM A 492.
Stainless steel complying with
F.
Steel Cable End Connections: Cadmium-plated steel assemblies with brackets,
swivel, and bolts designed for duct hanger service; with an automatic-locking
and clamping device.
G.
Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal
screws; compatible with duct materials.
PART 3 - EXECUTION
3.1
DUCT INSTALLATION
A.
Drawing plans, schematics, and diagrams indicate general location and
arrangement of duct system. Indicated duct locations, configurations, and
arrangements were used to size ducts and calculate friction loss for air-handling
equipment sizing and for other design considerations. Install duct systems as
indicated unless deviations to layout are approved on Shop Drawings and
Coordination Drawings.
B.
Install ducts according to SMACNA's "HVAC Duct Construction Standards Metal and Flexible" unless otherwise indicated.
C.
Install round ducts in maximum practical lengths.
D.
Install ducts with fewest possible joints.
E.
Install factory- or shop-fabricated fittings for changes in direction, size, and
shape and for branch connections.
F.
Unless otherwise indicated, install ducts vertically and horizontally, and parallel
and perpendicular to building lines.
G.
Install ducts close to walls, overhead construction, columns, and other
structural and permanent enclosure elements of building.
H.
Install ducts with a clearance of 1 inch, plus allowance for insulation thickness.
I.
Route ducts to avoid passing through transformer vaults and electrical
equipment rooms and enclosures.
J.
Where ducts pass through non-fire-rated interior partitions and exterior walls
and are exposed to view, cover the opening between the partition and duct or
duct insulation with sheet metal flanges of same metal thickness as the duct.
Overlap openings on four sides by at least 1-1/2 inches.
K.
Where ducts pass through fire-rated interior partitions and exterior walls, install
fire dampers. Comply with requirements in Division 23 Section "Air Duct
Accessories" for fire and smoke dampers.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
L.
3.2
233113-9
METAL DUCTS
NOVEMBER 24, 2015
Protect duct interiors from moisture, construction debris and dust, and other
foreign materials. Comply with SMACNA's "Duct Cleanliness for New
Construction Guidelines."
INSTALLATION OF EXPOSED DUCTWORK
A.
Protect ducts exposed in finished spaces from being dented, scratched, or
damaged.
B.
Trim duct sealants flush with metal. Create a smooth and uniform exposed
bead. Do not use two-part tape sealing system.
C.
Grind welds to provide smooth surface free of burrs, sharp edges, and weld
splatter. When welding stainless steel with a No. 3 or 4 finish, grind the welds
flush, polish the exposed welds, and treat the welds to remove discoloration
caused by welding.
D.
Maintain consistency, symmetry, and uniformity in the arrangement and
fabrication of fittings, hangers and supports, duct accessories, and air outlets.
E.
Repair or replace damaged sections and finished work that does not comply
with these requirements.
3.3
DUCT SEALING
A.
Seal ducts for duct static-pressure, seal classes, and leakage classes specified
in "Duct Schedule" Article according to SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible."
B.
Seal ducts to the following seal classes according to SMACNA's "HVAC Duct
Construction Standards - Metal and Flexible":
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Comply with SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible."
Outdoor, Supply-Air Ducts: Seal Class A.
Outdoor, Exhaust Ducts: Seal Class C.
Outdoor, Return-Air Ducts: Seal Class C.
Unconditioned Space, Supply-Air Ducts in Pressure Classes 2-Inch wg
and Lower: Seal Class B.
Unconditioned Space, Supply-Air Ducts in Pressure Classes Higher Than
2-Inch wg: Seal Class A.
Unconditioned Space, Exhaust Ducts: Seal Class C.
Unconditioned Space, Return-Air Ducts: Seal Class B.
Conditioned Space, Supply-Air Ducts in Pressure Classes 2-Inch wg and
Lower: Seal Class C.
Conditioned Space, Supply-Air Ducts in Pressure Classes Higher Than 2Inch wg: Seal Class B.
Conditioned Space, Exhaust Ducts: Seal Class B.
Conditioned Space, Return-Air Ducts: Seal Class C.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.4
233113-10
METAL DUCTS
NOVEMBER 24, 2015
HANGER AND SUPPORT INSTALLATION
A.
Comply with SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible," Chapter 4, "Hangers and Supports."
B.
Building Attachments: structural-steel fasteners appropriate for construction
materials to which hangers are being attached.
C.
Hanger Spacing: Comply with SMACNA's "HVAC Duct Construction Standards
- Metal and Flexible," Table 4-1, "Rectangular Duct Hangers Minimum Size,"
and Table 4-2, "Minimum Hanger Sizes for Round Duct," for maximum hanger
spacing; install hangers and supports within 24 inches of each elbow and within
48 inches of each branch intersection.
D.
Hangers Exposed to View: Threaded rod and angle or channel supports.
E.
Support vertical ducts with steel angles or channel secured to the sides of the
duct with welds, bolts, sheet metal screws, or blind rivets; support at each floor
and at a maximum intervals of 16 feet.
F.
Install upper attachments to structures. Select and size upper attachments with
pull-out, tension, and shear capacities appropriate for supported loads and
building materials where used.
3.5
CONNECTIONS
A.
Make connections to equipment with flexible connectors complying with
Division 23 Section "Air Duct Accessories."
B.
Comply with SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible" for branch, outlet and inlet, and terminal unit connections.
3.6
A.
3.7
PAINTING
Paint interior of metal ducts that are visible through registers and grilles and
that do not have duct liner. Apply one coat of flat, black, latex paint over a
compatible galvanized-steel primer.
Paint materials and application
requirements are specified in Division 09 painting Sections.
FIELD QUALITY CONTROL
A.
Perform tests and inspections.
B.
Leakage Tests:
1.
Comply with SMACNA's "HVAC Air Duct Leakage Test Manual." Submit
a test report for each test.
2.
Disassemble, reassemble, and seal segments of systems to
accommodate leakage testing and for compliance with test requirements.
Test for leaks before applying external insulation.
3.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
4.
5.
C.
233113-11
METAL DUCTS
NOVEMBER 24, 2015
Conduct tests at static pressures equal to maximum design pressure of
system or section being tested. If static-pressure classes are not
indicated, test system at maximum system design pressure. Do not
pressurize systems above maximum design operating pressure.
Give seven days' advance notice for testing.
Duct System Cleanliness Tests:
1.
2.
Visually inspect duct system to ensure that no visible contaminants are
present.
Test sections of metal duct system, chosen randomly by Owner, for
cleanliness according to "Vacuum Test" in NADCA ACR, "Assessment,
Cleaning and Restoration of HVAC Systems."
a.
Acceptable Cleanliness Level: Net weight of debris collected on the
filter media shall not exceed 0.75 mg/100 sq. cm.
D.
Duct system will be considered defective if it does not pass tests and
inspections.
E.
Prepare test and inspection reports.
3.8
DUCT CLEANING
A.
Clean new duct system(s) before testing, adjusting, and balancing.
B.
Use service openings for entry and inspection.
1.
2.
3.
C.
Particulate Collection and Odor Control:
1.
2.
D.
Create new openings and install access panels appropriate for duct
static-pressure class if required for cleaning access. Provide insulated
panels for insulated or lined duct. Patch insulation and liner as
recommended by duct liner manufacturer. Comply with Division 23
Section "Air Duct Accessories" for access panels and doors.
Disconnect and reconnect flexible ducts as needed for cleaning and
inspection.
Remove and reinstall ceiling to gain access during the cleaning process.
When venting vacuuming system inside the building, use HEPA filtration
with 99.97 percent collection efficiency for 0.3-micron-size (or larger)
particles.
When venting vacuuming system to outdoors, use filter to collect debris
removed from HVAC system, and locate exhaust downwind and away
from air intakes and other points of entry into building.
Clean the following components by removing surface contaminants and
deposits:
1.
2.
Air outlets and inlets (registers, grilles, and diffusers).
Supply, return, and exhaust fans including fan housings, plenums (except
ceiling supply and return plenums), scrolls, blades or vanes, shafts,
baffles, dampers, and drive assemblies.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
6.
7.
E.
2.
3.
4.
5.
6.
7.
A.
3.10
Air-handling unit internal surfaces and components including mixing box,
coil section, air wash systems, spray eliminators, condensate drain pans,
humidifiers and dehumidifiers, filters and filter sections, and condensate
collectors and drains.
Coils and related components.
Return-air ducts, dampers, actuators, and turning vanes except in ceiling
plenums and mechanical equipment rooms.
Supply-air ducts, dampers, actuators, and turning vanes.
Dedicated exhaust and ventilation components and makeup air systems.
Mechanical Cleaning Methodology:
1.
3.9
233113-12
METAL DUCTS
NOVEMBER 24, 2015
Clean metal duct systems using mechanical cleaning methods that
extract contaminants from within duct systems and remove contaminants
from building.
Use vacuum-collection devices that are operated continuously during
cleaning. Connect vacuum device to downstream end of duct sections so
areas being cleaned are under negative pressure.
Use mechanical agitation to dislodge debris adhered to interior duct
surfaces without damaging integrity of metal ducts, duct liner, or duct
accessories.
Clean fibrous-glass duct liner with HEPA vacuuming equipment; do not
permit duct liner to get wet. Replace fibrous-glass duct liner that is
damaged, deteriorated, or delaminated or that has friable material, mold,
or fungus growth.
Clean coils and coil drain pans according to NADCA 1992. Keep drain
pan operational. Rinse coils with clean water to remove latent residues
and cleaning materials; comb and straighten fins.
Provide drainage and cleanup for wash-down procedures.
Antimicrobial Agents and Coatings: Apply EPA-registered antimicrobial
agents if fungus is present. Apply antimicrobial agents according to
manufacturer's written instructions after removal of surface deposits and
debris.
START UP
Air Balance: Comply with requirements in Division 23 Section "Testing,
Adjusting, and Balancing for HVAC."
DUCT SCHEDULE
A.
Fabricate ducts with galvanized sheet steel except as otherwise indicated and
as follows:
B.
Supply Ducts:
1.
Ducts Connected to Fan Coil Units and Terminal Units:
a.
b.
c.
Pressure Class: Positive 1-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
d.
2.
Pressure Class: Positive 2-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Return Ducts:
1.
Ducts Connected to Fan Coil Units:
a.
b.
c.
d.
2.
3.
Pressure Class: Positive or negative 1-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Ducts Connected to Air-Handling Units:
a.
b.
c.
d.
Pressure Class: Positive or negative 2-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Ducts Connected to Equipment Not Listed Above:
a.
b.
c.
d.
D.
Pressure Class: Positive 2-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Ducts Connected to Equipment Not Listed Above:
a.
b.
c.
d.
C.
SMACNA Leakage Class for Round and Flat Oval: 12.
Ducts Connected to Constant-Volume Air-Handling Units:
a.
b.
c.
d.
3.
233113-13
METAL DUCTS
NOVEMBER 24, 2015
Pressure Class: Positive or negative 2-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Exhaust Ducts:
1.
Ducts Connected to Fans Exhausting (ASHRAE 62.1, Class 1 and 2) Air:
a.
b.
c.
d.
2.
Pressure Class: Negative 1-inch wg.
Minimum SMACNA Seal Class: A if negative pressure, and A if
positive pressure.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Ducts Connected to Equipment Not Listed Above:
a.
b.
Pressure Class: Positive or negative 2-inch wg.
Minimum SMACNA Seal Class: A if negative pressure, and A if
positive pressure.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
c.
d.
E.
Ducts Connected to Fan Coil Units:
a.
b.
c.
d.
2.
Pressure Class: Positive or negative 1-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Ducts Connected to Air-Handling Units:
a.
b.
c.
d.
Pressure Class: Positive or negative 2-inch wg.
Minimum SMACNA Seal Class: A.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Intermediate Reinforcement:
1.
Galvanized-Steel Ducts: Galvanized steel or carbon steel coated with
zinc-chromate primer.
2.
Stainless-Steel Ducts:
a.
b.
3.
G.
SMACNA Leakage Class for Rectangular: 12.
SMACNA Leakage Class for Round and Flat Oval: 12.
Outdoor-Air (Not Filtered, Heated, or Cooled) Ducts:
1.
F.
233113-14
METAL DUCTS
NOVEMBER 24, 2015
Exposed to Airstream: Match duct material.
Not Exposed to Airstream: Match duct material.
Aluminum Ducts: Aluminum.
Elbow Configuration:
1.
Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible," Figure 2-2, "Rectangular Elbows."
a.
Velocity 1000 fpm or Lower:
1)
2)
b.
Velocity 1000 to 1500 fpm:
1)
2)
3)
c.
Radius Type RE 1 with minimum 0.5 radius-to-diameter ratio.
Mitered Type RE 4 without vanes.
Radius Type RE 1 with minimum 1.0 radius-to-diameter ratio.
Radius Type RE 3 with minimum 0.5 radius-to-diameter ratio
and two vanes.
Mitered Type RE 2 with vanes complying with SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible,"
Figure 2-3, "Vanes and Vane Runners," and Figure 2-4,
"Vane Support in Elbows."
Velocity 1500 fpm (7.6 m/s) or Higher:
1)
Radius Type RE 1 with minimum 1.5 radius-to-diameter ratio.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2)
3)
2.
c.
Radius Type RE 1 with minimum 1.5 radius-to-diameter ratio.
Radius Type RE 3 with minimum 1.0 radius-to-diameter ratio and
two vanes.
Mitered Type RE 2 with vanes complying with SMACNA's "HVAC
Duct Construction Standards - Metal and Flexible," Figure 2-3,
"Vanes and Vane Runners," and Figure 2-4, "Vane Support in
Elbows."
Round Duct:
Comply with SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible," Figure 3-3, "Round Duct Elbows."
a.
Minimum Radius-to-Diameter Ratio and Elbow Segments: Comply
with SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible," Table 3-1, "Mitered Elbows." Elbows with less than 90degree change of direction have proportionately fewer segments.
1)
2)
3)
4)
b.
c.
H.
Radius Type RE 3 with minimum 1.0 radius-to-diameter ratio
and two vanes.
Mitered Type RE 2 with vanes complying with SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible,"
Figure 2-3, "Vanes and Vane Runners," and Figure 2-4,
"Vane Support in Elbows."
Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible," Figure 2-2, "Rectangular Elbows."
a.
b.
3.
233113-15
METAL DUCTS
NOVEMBER 24, 2015
Velocity 1000 fpm or Lower: 0.5 radius-to-diameter ratio and
three segments for 90-degree elbow.
Velocity 1000 to 1500 fpm: 1.0 radius-to-diameter ratio and
four segments for 90-degree elbow.
Velocity 1500 fpm or Higher: 1.5 radius-to-diameter ratio and
five segments for 90-degree elbow.
Radius-to Diameter Ratio: 1.5.
Round Elbows, 12 Inches and Smaller in Diameter: Stamped or
pleated.
Round Elbows, 14 Inches and Larger in Diameter: Standing seam.
Branch Configuration:
1.
Rectangular Duct: Comply with SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible," Figure 2-6, "Branch Connections."
a.
b.
2.
Rectangular Main to Rectangular Branch: 45-degree entry.
Rectangular Main to Round Branch: Spin in.
Round: Comply with SMACNA's "HVAC Duct Construction Standards Metal and Flexible," Figure 3-4, "90 Degree Tees and Laterals," and
Figure 3-5, "Conical Tees." Saddle taps are permitted in existing duct.
a.
b.
c.
Velocity 1000 fpm or Lower: 90-degree tap.
Velocity 1000 to 1500 fpm: Conical tap.
Velocity 1500 fpm or Higher: 45-degree lateral.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
END OF SECTION 233113
233113-16
METAL DUCTS
NOVEMBER 24, 2015
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233116-1
NONMETAL DUCTS
NOVEMBER 24, 2015
SECTION 233116 - NONMETAL DUCTS
PART 1 - GENERAL
1.1
A.
SUMMARY
Section Includes:
1.
B.
Related Sections:
1.
2.
3.
1.2
A.
1.3
Fibrous-glass ducts and fittings.
Division 23 Section "Testing, Adjusting, and Balancing for HVAC" for testing,
adjusting, and balancing requirements for nonmetal ducts.
Division 23 Section "Metal Ducts" for single- and double-wall, rectangular and
round ducts.
Division 23 Section "Air Duct Accessories" for dampers, duct-mounting access
doors and panels, turning vanes, and flexible ducts.
PERFORMANCE REQUIREMENTS
Airstream Surfaces: Surfaces in contact with the airstream shall comply with
requirements in ASHRAE 62.1-2004.
SUBMITTALS
A.
Product Data: For each type of product indicated.
B.
Shop Drawings:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
C.
Fabrication, assembly, and installation, including plans, elevations, sections,
components, and attachments to other work.
Duct layout indicating sizes and pressure classes.
Elevation of top of ducts.
Dimensions of main duct runs from building grid lines.
Fittings.
Reinforcement and spacing.
Seam and joint construction.
Penetrations through fire-rated and other partitions.
Equipment installation based on equipment being used on Project.
Hangers and supports, including methods for duct and building attachment and
vibration isolation.
Coordination Drawings: Plans, drawn to scale, on which the following items are shown
and coordinated with each other, using input from installers of the items involved:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
5.
6.
Duct installation in congested spaces, indicating coordination with general
construction, building components, and other building services.
Indicate
proposed changes to duct layout.
Suspended ceiling components.
Structural members to which duct will be attached.
Size and location of initial access modules for acoustical tile.
Penetrations of smoke barriers and fire-rated construction.
Items penetrating finished ceiling including the following:
a.
b.
c.
d.
e.
f.
1.4
233116-2
NONMETAL DUCTS
NOVEMBER 24, 2015
Lighting fixtures.
Air outlets and inlets.
Speakers.
Sprinklers.
Access panels.
Perimeter moldings.
QUALITY ASSURANCE
A.
ASHRAE Compliance: Applicable requirements in ASHRAE 62.1-2004, Section 5 "Systems and Equipment" and Section 7 - "Construction and System Start-Up."
B.
ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1-2004,
Section 6.4.4 - "HVAC System Construction and Insulation."
C.
NFPA Compliance:
1.
2.
NFPA 90A, "Installation of Air Conditioning and Ventilating Systems."
NFPA 90B, "Installation of Warm Air Heating and Air Conditioning Systems."
PART 2 - PRODUCTS
2.1
A.
FIBROUS-GLASS DUCTS AND FITTINGS
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
1.
2.
3.
4.
B.
CertainTeed Corporation; Insulation Group.
Johns Manville.
Knauf Insulation.
Owens Corning.
Fibrous-Glass Duct Materials: Resin-bonded fiberglass, faced on the outside surface
with fire-resistive FSK vapor retarder and with a smooth fiberglass mat finish on the airside surface.
1.
2.
Duct Board: Factory molded into rectangular boards.
Round Duct: Factory molded into straight round duct and smooth fittings.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
6.
7.
8.
9.
C.
Temperature Limits: 40 to 250 deg F inside ducts; 150 deg F ambient
temperature surrounding ducts.
Maximum Thermal Conductivity: 0.24 Btu x in./h x sq. ft. x deg F at 75 deg F
mean temperature.
Moisture Absorption: Not exceeding 5 percent by weight at 120 deg F and 95
percent relative humidity for 96 hours when tested according to
ASTM C 1104/C 1104M.
Permeability:
0.02 perms maximum when tested according to
ASTM E 96/E 96M, Procedure A.
Antimicrobial Agent: Compound shall be tested for efficacy by an NRTL, and
registered by the EPA for use in HVAC systems.
Noise-Reduction Coefficient:
0.65 minimum when tested according to
ASTM C 423, Mounting A.
Required Markings: EI rating, UL label, and other markings required by UL 181
on each full sheet of duct board.
Closure Materials:
1.
Heat-Activated Tape: Comply with UL 181A; imprinted by the manufacturer with
the coding "181A-H," the manufacturer's name, and a date code.
a.
b.
c.
d.
e.
2.
Tape: Aluminum foil-scrim tape imprinted with listing information.
Minimum Tape Width: 3 inches.
Heat-Sensitive Imprint: Printed indicator on tape to show proper heating
during application has been achieved.
Water resistant.
Mold and mildew resistant.
Two-Part Tape Sealing System: Comply with UL 181A; imprinted by the
manufacturer with the coding "181A-M," the manufacturer's name, and a date
code.
a.
b.
c.
d.
e.
f.
D.
233116-3
NONMETAL DUCTS
NOVEMBER 24, 2015
Tape: Woven glass fiber impregnated with mineral gypsum.
Minimum Tape Width: 3 inches.
Sealant: Modified styrene acrylic.
Water resistant.
Mold and mildew resistant.
For indoor applications, use sealant that has a VOC content of 250 g/L or
less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).
Fabrication:
1.
2.
3.
Select joints, seams, transitions, elbows, and branch connections and fabricate
according to SMACNA's "Fibrous Glass Duct Construction Standards,"
Chapter 2, "Specifications and Closure," and Chapter 4, "Fittings and
Connections."
Fabricate 90-degree mitered elbows to include turning vanes.
Reinforcements: Comply with requirements in SMACNA's "Fibrous Glass Duct
Construction Standards," Chapter 5, "Reinforcement" for channel- and tie-rod
reinforcement materials, spacing, and fabrication.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
4.
2.2
233116-4
NONMETAL DUCTS
NOVEMBER 24, 2015
Preformed Round Duct: Comply with NAIMA AH116, "Fibrous Glass Duct
Construction Standards," Section VII, "Preformed Round Duct."
HANGERS AND SUPPORTS
A.
Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts.
B.
Hanger Rods for Corrosive Environments: Electrogalvanized, all-thread rods or
galvanized rods with threads painted with zinc-chromate primer after installation.
C.
Strap and Rod Sizes: Comply with SMACNA's "HVAC Duct Construction Standards Metal and Flexible," Table 4-1, "Rectangular Duct Hangers Minimum Size," and
Table 4-2, "Minimum Hanger Sizes for Round Duct."
D.
Steel Cables: ASTM A 603, galvanized steel with end connections made of cadmiumplated steel assemblies with brackets, swivel, and bolts designed for duct hanger
service; with an automatic-locking and clamping device.
E.
Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws;
compatible with duct materials.
F.
Trapeze and Riser Supports: Steel shapes complying with ASTM A 36/A 36M.
PART 3 - EXECUTION
3.1
DUCT INSTALLATION
A.
Install ducts with fewest possible joints.
B.
Unless otherwise indicated, install ducts vertically and horizontally, and parallel and
perpendicular to building lines.
C.
Install ducts close to walls, overhead construction, columns, and other structural and
permanent enclosure elements of building.
D.
Install ducts with a clearance of 1 inch, plus allowance for insulation thickness.
E.
Where ducts pass through non-fire-rated interior partitions and exterior walls and are
exposed to view, cover the opening between the partition and duct or duct insulation
with sheet metal flanges. Overlap openings on four sides by at least 1-1/2 inches.
F.
Where ducts pass through fire-rated interior partitions and exterior walls, install fire
dampers. Comply with requirements in Division 23 Section "Air Duct Accessories" for
fire and smoke dampers.
G.
Protect duct interiors from the moisture, construction debris and dust, and other foreign
materials. Comply with SMACNA's "Duct Cleanliness for New Construction
Guidelines."
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
H.
3.2
233116-5
NONMETAL DUCTS
NOVEMBER 24, 2015
Install fibrous-glass ducts and fittings to comply with SMACNA's "Fibrous Glass Duct
Construction Standards."
HANGER AND SUPPORT INSTALLATION
A.
Install hangers and supports for fibrous-glass ducts and fittings to comply with
SMACNA's "Fibrous Glass Duct Construction Standards," Chapter 6, "Hangers and
Supports."
B.
Building Attachments: Concrete inserts, powder-actuated fasteners, or structural-steel
fasteners appropriate for construction materials to which hangers are being attached.
1.
2.
3.
4.
C.
3.3
Install concrete inserts before placing concrete.
Install powder-actuated concrete fasteners after concrete is placed and
completely cured.
Use powder-actuated concrete fasteners for standard-weight aggregate
concretes or for slabs more than 4 inches thick.
Do not use powder-actuated concrete fasteners for lightweight-aggregate
concretes or for slabs less than 4 inches thick.
Install upper attachments to structures. Select and size upper attachments with pullout, tension, and shear capacities appropriate for supported loads and building
materials where used.
DUCT CLEANING
A.
Clean new duct system(s) before testing, adjusting, and balancing.
B.
Use service openings for entry and inspection.
1.
2.
3.
C.
Particulate Collection and Odor Control:
1.
2.
D.
Create new openings and install access panels appropriate for duct staticpressure class if required for cleaning access. Provide insulated panels for
insulated or lined duct. Patch duct as recommended by duct manufacturer.
Comply with Division 23 Section "Air Duct Accessories" for access panels and
doors.
Disconnect and reconnect flexible ducts as needed for cleaning and inspection.
Remove and reinstall ceiling to gain access during the cleaning process.
When venting vacuuming system inside the building, use HEPA filtration with
99.97 percent collection efficiency for 0.3-micron-size (or larger) particles.
When venting vacuuming system to outdoors, use filter to collect debris removed
from HVAC system, and locate exhaust downwind and away from air intakes and
other points of entry into building.
Clean the following components by removing surface contaminants and deposits:
1.
Air outlets and inlets (registers, grilles, and diffusers).
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
4.
5.
6.
7.
E.
2.
3.
4.
5.
6.
A.
3.5
A.
Supply, return, and exhaust fans including fan housings, plenums (except ceiling
supply and return plenums), scrolls, blades or vanes, shafts, baffles, dampers,
and drive assemblies.
Air-handling unit internal surfaces and components including mixing box, coil
section, air wash systems, spray eliminators, condensate drain pans, humidifiers
and dehumidifiers, filters and filter sections, and condensate collectors and
drains.
Coils and related components.
Return-air ducts, dampers, actuators, and turning vanes except in ceiling
plenums and mechanical equipment rooms.
Supply-air ducts, dampers, actuators, and turning vanes.
Dedicated exhaust and ventilation components and makeup air systems.
Mechanical Cleaning Methodology:
1.
3.4
233116-6
NONMETAL DUCTS
NOVEMBER 24, 2015
Use vacuum-collection devices that are operated continuously during cleaning.
Connect vacuum device to downstream end of duct sections so areas being
cleaned are under negative pressure.
Use mechanical agitation to dislodge debris adhered to interior duct surfaces
without damaging integrity of ducts or duct accessories.
Clean fibrous-glass duct with HEPA vacuuming equipment; do not permit duct to
get wet.
Replace fibrous-glass duct that is damaged, deteriorated, or
delaminated or that has friable material, mold, or fungus growth.
Clean coils and coil drain pans according to NADCA 1992. Keep drain pan
operational. Rinse coils with clean water to remove latent residues and cleaning
materials; comb and straighten fins.
Provide drainage and cleanup for wash-down procedures.
Antimicrobial Agents and Coatings: Apply EPA-registered antimicrobial agents if
fungus is present. Apply antimicrobial agents according to manufacturer's written
instructions after removal of surface deposits and debris.
START UP
Air Balance: Comply with requirements in Division 23 Section "Testing, Adjusting, and
Balancing for HVAC."
DUCT SCHEDULE
Transfer Ducts and Return Boots:
1.
Fibrous-Glass Rectangular Ducts and Fittings:
a.
b.
2.
Minimum Flexural Rigidity: EI-475.
Minimum Board Thickness: 1 inch.
Fibrous-Glass Round Ducts and Fittings:
a.
Minimum Thickness: 1 inch.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
END OF SECTION 233116
233116-7
NONMETAL DUCTS
NOVEMBER 24, 2015
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233300-1
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
SECTION 233300 - AIR DUCT ACCESSORIES
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 01 Specification Sections, apply to this
Section.
SUMMARY
Section Includes:
1.
2.
3.
4.
5.
6.
7.
8.
B.
Related Sections:
1.
1.3
A.
Backdraft and pressure relief dampers.
Manual volume dampers.
Ceiling dampers.
Fire dampers.
Turning vanes.
Duct-mounted access doors.
Flexible ducts.
Duct accessory hardware.
Division 28 Section "Fire Detection and Alarm" for duct-mounted fire and
smoke detectors.
SUBMITTALS
Shop Drawings: For duct accessories. Include plans, elevations, sections,
details and attachments to other work.
1.
Detail duct accessories fabrication and installation in ducts and other
construction.
Include dimensions, weights, loads, and required
clearances; and method of field assembly into duct systems and other
construction. Include the following:
a.
b.
c.
d.
e.
Special fittings.
Manual volume damper installations.
Control damper installations.
Fire-damper, smoke-damper, combination fire- and smoke-damper,
ceiling, and corridor damper installations, including sleeves; and
duct-mounted access doors and remote damper operators.
Wiring Diagrams: For power, signal, and control wiring.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.4
A.
1.5
A.
233300-2
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
QUALITY ASSURANCE
Comply with NFPA 90A, "Installation of Air Conditioning and Ventilating
Systems," and with NFPA 90B, "Installation of Warm Air Heating and Air
Conditioning Systems."
EXTRA MATERIALS
Furnish extra materials that match products installed and that are packaged
with protective covering for storage and identified with labels describing
contents.
1.
Fusible Links: Furnish quantity equal to 10 percent of amount installed.
PART 2 - PRODUCTS
2.1
MATERIALS
A.
Comply with SMACNA's "HVAC Duct Construction Standards - Metal and
Flexible" for acceptable materials, material thicknesses, and duct construction
methods unless otherwise indicated. Sheet metal materials shall be free of
pitting, seam marks, roller marks, stains, discolorations, and other
imperfections.
B.
Galvanized Sheet Steel: Comply with ASTM A 653/A 653M.
1.
2.
2.2
A.
BACKDRAFT DAMPERS
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
B.
Galvanized Coating Designation: G60.
Exposed-Surface Finish: Mill phosphatized.
Air Balance Inc.; a division of Mestek, Inc.
American Warming and Ventilating; a division of Mestek, Inc.
Cesco Products; a division of Mestek, Inc.
Duro Dyne Inc.
Greenheck Fan Corporation.
Lloyd Industries, Inc.
Nailor Industries Inc.
NCA Manufacturing, Inc.
Pottorff; a division of PCI Industries, Inc.
Ruskin Company.
SEMCO Incorporated.
Vent Products Company, Inc.
Maximum Air Velocity: 2000 fpm.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233300-3
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
C.
Maximum System Pressure: 1-inch wg.
D.
Frame: 0.052-inch-thick, galvanized sheet steel with welded corners and
mounting flange.
E.
Blades: Multiple single-piece blades, center-pivoted, maximum 6-inch width
with sealed edges.
F.
Blade Action: Parallel.
G.
Blade Seals: Vinyl foam or Extruded vinyl, mechanically locked.
H.
Blade Axles:
1.
2.
Material: Nonferrous metal.
Diameter: 0.20 inch.
I.
Tie Bars and Brackets: Aluminum or Galvanized steel.
J.
Return Spring: Adjustable tension.
K.
Bearings: Steel ball or synthetic pivot bushings.
L.
Accessories:
1.
2.
2.3
A.
Adjustment device to permit setting for varying differential static pressure.
Electric actuators.
MANUAL VOLUME DAMPERS
Standard, Steel, Manual Volume Dampers:
1.
Manufacturers: Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
3.
4.
Air Balance Inc.; a division of Mestek, Inc.
American Warming and Ventilating; a division of Mestek, Inc.
Flexmaster U.S.A., Inc.
McGill AirFlow LLC.
METALAIRE, Inc.
Nailor Industries Inc.
Pottorff; a division of PCI Industries, Inc.
Ruskin Company.
Trox USA Inc.
Vent Products Company, Inc.
Standard leakage rating, with linkage outside airstream.
Suitable for horizontal or vertical applications.
Frames:
a.
Hat-shaped, galvanized channels, 0.064-inch minimum thickness.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
b.
c.
5.
B.
Multiple or single blade.
Parallel- or opposed-blade design.
Stiffen damper blades for stability.
Galvanized 0.064 inch thick.
Blade Axles: Galvanized steel.
Bearings:
a.
b.
8.
Mitered and welded corners.
Flanges for attaching to walls and flangeless frames for installing in
ducts.
Blades:
a.
b.
c.
d.
6.
7.
233300-4
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Oil-impregnated bronze.
Dampers in ducts with pressure classes of 3-inch wg or less shall
have axles full length of damper blades and bearings at both ends
of operating shaft.
Tie Bars and Brackets: Galvanized steel.
Low-Leakage, Steel, Manual Volume Dampers:
1.
Manufacturers: Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
3.
4.
Low-leakage rating, with linkage outside airstream, and bearing AMCA's
Certified Ratings Seal for both air performance and air leakage.
Suitable for horizontal or vertical applications.
Frames:
a.
b.
c.
d.
5.
Air Balance Inc.; a division of Mestek, Inc.
American Warming and Ventilating; a division of Mestek, Inc.
Flexmaster U.S.A., Inc.
McGill AirFlow LLC.
METALAIRE, Inc.
Nailor Industries Inc.
Pottorff; a division of PCI Industries, Inc.
Ruskin Company.
Trox USA Inc.
Vent Products Company, Inc.
Hat shaped.
Galvanized-steel channels, 0.064 inch thick.
Mitered and welded corners.
Flanges for attaching to walls and flangeless frames for installing in
ducts.
Blades:
a.
b.
Multiple or single blade.
Parallel- or opposed-blade design.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
c.
d.
6.
7.
3.
2.
3.
A.
Zinc-plated, die-cast core with dial and handle made of 3/32-inch-thick
zinc-plated steel, and a 3/4-inch hexagon locking nut.
Include center hole to suit damper operating-rod size.
Include elevated platform for insulated duct mounting.
CEILING DAMPERS
Manufacturers: Subject to compliance with requirements, [provide products by
one of the following] [available manufacturers offering products that may be
incorporated into the Work include, but are not limited to, the following]:
1.
2.
3.
4.
5.
6.
7.
8.
9.
B.
Size: 1-inch diameter.
Material: Galvanized-steel pipe rotating within pipe-bearing assembly
mounted on supports at each mullion and at each end of multiple-damper
assemblies.
Length and Number of Mountings: As required to connect linkage of each
damper in multiple-damper assembly.
Damper Hardware:
1.
2.4
Include locking device to hold single-blade dampers in a fixed
position without vibration.
Jackshaft:
1.
2.
D.
Oil-impregnated bronze.
Dampers in ducts with pressure classes of 3-inch wg (750 Pa) or
less shall have axles full length of damper blades and bearings at
both ends of operating shaft.
Blade Seals: Vinyl.
Jamb Seals: Cambered aluminum.
Tie Bars and Brackets: Aluminum.
Accessories:
a.
C.
Stiffen damper blades for stability.
Galvanized, roll-formed steel, 0.064 inch thick.
Blade Axles: Galvanized steel.
Bearings:
a.
b.
8.
9.
10.
11.
233300-5
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Air Balance Inc.; a division of Mestek, Inc.
Cesco Products; a division of Mestek, Inc.
McGill AirFlow LLC.
METALAIRE, Inc.
Nailor Industries Inc.
Prefco; Perfect Air Control, Inc.
Ruskin Company.
Vent Products Company, Inc.
Ward Industries, Inc.; a division of Hart & Cooley, Inc.
General Requirements:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
233300-6
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Labeled according to UL 555C by an NRTL.
Comply with construction details for tested floor- and roof-ceiling
assemblies as indicated in UL's "Fire Resistance Directory."
C.
Frame: Galvanized sheet steel, round or rectangular, style to suit ceiling
construction.
D.
Blades: Galvanized sheet steel with refractory insulation.
E.
Heat-Responsive Device: Replaceable, 165 deg F rated, fusible links.
F.
Fire Rating: 2 or 3 hours.
2.5
A.
FIRE DAMPERS
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Air Balance Inc.; a division of Mestek, Inc.
Arrow United Industries; a division of Mestek, Inc.
Cesco Products; a division of Mestek, Inc.
Greenheck Fan Corporation.
McGill AirFlow LLC.
METALAIRE, Inc.
Nailor Industries Inc.
NCA Manufacturing, Inc.
PHL, Inc.
Pottorff; a division of PCI Industries, Inc.
Prefco; Perfect Air Control, Inc.
Ruskin Company.
Vent Products Company, Inc.
Ward Industries, Inc.; a division of Hart & Cooley, Inc.
B.
Type: Static and dynamic; rated and labeled according to UL 555 by an NRTL.
C.
Closing rating in ducts up to 4-inch wg static pressure class and minimum
4000-fpm velocity.
D.
Fire Rating: 1-1/2 and 3 hours.
E.
Frame: Curtain type with blades outside airstream except when located behind
grille where blades may be inside airstream; fabricated with roll-formed, 0.034inch-thick galvanized steel; with mitered and interlocking corners.
F.
Mounting Sleeve: Factory- or field-installed, galvanized sheet steel.
1.
Minimum Thickness: 0.052 or 0.138 inch thick, as indicated, and of
length to suit application.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
233300-7
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Exception:
Omit sleeve where damper-frame width permits direct
attachment of perimeter mounting angles on each side of wall or floor;
thickness of damper frame must comply with sleeve requirements.
G.
Mounting Orientation: Vertical or horizontal as indicated.
H.
Blades: Roll-formed, interlocking, 0.034-inch-thick, galvanized sheet steel. In
place of interlocking blades, use full-length, 0.034-inch-thick, galvanized-steel
blade connectors.
I.
Horizontal Dampers: Include blade lock and stainless-steel closure spring.
J.
Heat-Responsive Device: Replaceable, 165 deg F rated, fusible links.
2.6
A.
TURNING VANES
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
1.
2.
3.
4.
5.
B.
Ductmate Industries, Inc.
Duro Dyne Inc.
METALAIRE, Inc.
SEMCO Incorporated.
Ward Industries, Inc.; a division of Hart & Cooley, Inc.
Manufactured Turning Vanes for Metal Ducts: Curved blades of galvanized
sheet steel; support with bars perpendicular to blades set; set into vane runners
suitable for duct mounting.
1.
Acoustic Turning Vanes: Fabricate airfoil-shaped aluminum extrusions
with perforated faces and fibrous-glass fill.
C.
Manufactured Turning Vanes for Nonmetal Ducts: Fabricate curved blades of
resin-bonded fiberglass with acrylic polymer coating; support with bars
perpendicular to blades set; set into vane runners suitable for duct mounting.
D.
General Requirements: Comply with SMACNA's "HVAC Duct Construction
Standards - Metal and Flexible"; Figures 2-3, "Vanes and Vane Runners," and
2-4, "Vane Support in Elbows."
E.
Vane Construction: Single wall for ducts up to 48 inches wide and double wall
for larger dimensions.
2.7
A.
DUCT-MOUNTED ACCESS DOORS
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
1.
American Warming and Ventilating; a division of Mestek, Inc.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
4.
5.
6.
7.
8.
9.
10.
B.
Cesco Products; a division of Mestek, Inc.
Ductmate Industries, Inc.
Flexmaster U.S.A., Inc.
Greenheck Fan Corporation.
McGill AirFlow LLC.
Nailor Industries Inc.
Pottorff; a division of PCI Industries, Inc.
Ventfabrics, Inc.
Ward Industries, Inc.; a division of Hart & Cooley, Inc.
Duct-Mounted Access Doors: Fabricate access panels according to SMACNA's
"HVAC Duct Construction Standards - Metal and Flexible"; Figures 2-10, "Duct
Access Doors and Panels," and 2-11, "Access Panels - Round Duct."
1.
Door:
a.
b.
c.
d.
e.
2.
3.
b.
c.
d.
A.
Double wall, rectangular.
Galvanized sheet metal with insulation fill and thickness as
indicated for duct pressure class.
Vision panel.
Hinges and Latches: 1-by-1-inch butt or piano hinge and cam
latches.
Fabricate doors airtight and suitable for duct pressure class.
Frame: Galvanized sheet steel, with bend-over tabs and foam gaskets.
Number of Hinges and Locks:
a.
2.8
233300-8
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Access Doors Less Than 12 Inches Square: No hinges and two
sash locks.
Access Doors up to 18 Inches Square: Two hinges and two sash
locks.
Access Doors up to 24 by 48 Inches: Three hinges and two
compression latches with outside and inside handles.
Access Doors Larger Than 24 by 48 Inches: Four hinges and two
compression latches with outside and inside handles.
FLEXIBLE CONNECTORS
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
1.
2.
3.
4.
Ductmate Industries, Inc.
Duro Dyne Inc.
Ventfabrics, Inc.
Ward Industries, Inc.; a division of Hart & Cooley, Inc.
B.
Materials: Flame-retardant or noncombustible fabrics.
C.
Coatings and Adhesives: Comply with UL 181, Class 1.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
D.
Indoor System, Flexible Connector Fabric: Glass fabric double coated with
neoprene.
1.
2.
3.
E.
3.
A.
Minimum Weight: 14 oz./sq. yd.
Tensile Strength: 450 lbf/inch in the warp and 340 lbf/inch in the filling.
Service Temperature: Minus 67 to plus 500 deg F.
Manufacturers:
Subject to compliance with requirements, available
manufacturers offering products that may be incorporated into the Work
include, but are not limited to, the following:
Flexmaster U.S.A., Inc.
McGill AirFlow LLC.
Ward Industries, Inc.; a division of Hart & Cooley, Inc.
Insulated, Flexible Duct: UL 181, Class 1, 2-ply vinyl film supported by helically
wound, spring-steel wire; fibrous-glass insulation; polyethylene vapor-barrier
film.
1.
2.
3.
4.
C.
Minimum Weight: 16 oz./sq. yd.
Tensile Strength: 285 lbf/inch in the warp and 185 lbf/inch in the filling.
Service Temperature: Minus 67 to plus 500 deg F.
FLEXIBLE DUCTS
1.
2.
3.
B.
Glass fabric coated with
High-Corrosive-Environment System, Flexible Connectors: Glass fabric with
chemical-resistant coating.
1.
2.
3.
2.9
Minimum Weight: 24 oz./sq. yd.
Minimum Tensile Strength: 500 lbf/inch in the warp and 440 lbf/inch in
the filling.
Service Temperature: Minus 50 to plus 250 deg F.
High-Temperature System, Flexible Connectors:
silicone rubber.
1.
2.
3.
G.
Minimum Weight: 26 oz./sq. yd.
Tensile Strength: 480 lbf/inch in the warp and 360 lbf/inch in the filling.
Service Temperature: Minus 40 to plus 200 deg F.
Outdoor System, Flexible Connector Fabric: Glass fabric double coated with
weatherproof, synthetic rubber resistant to UV rays and ozone.
1.
2.
F.
233300-9
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Pressure Rating: 10-inch wg positive and 1.0-inch wg negative.
Maximum Air Velocity: 4000 fpm.
Temperature Range: Minus 10 to plus 160 deg F.
Insulation R-value: Comply with ASHRAE/IESNA 90.1-2004.
Insulated, Flexible Duct: UL 181, Class 1, black polymer film supported by
helically wound, spring-steel wire; fibrous-glass insulation; polyethylene vaporbarrier film.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
D.
Pressure Rating: 10-inch wg positive and 1.0-inch wg negative.
Maximum Air Velocity: 4000 fpm.
Temperature Range: Minus 20 to plus 210 deg F.
Insulation R-value: Comply with ASHRAE/IESNA 90.1-2004.
Flexible Duct Connectors:
1.
2.10
Pressure Rating: 10-inch wg positive and 1.0-inch wg negative.
Maximum Air Velocity: 4000 fpm.
Temperature Range: Minus 20 to plus 210 deg F.
Insulation R-value: Comply with ASHRAE/IESNA 90.1-2004.
Insulated, Flexible Duct: UL 181, Class 1, aluminum laminate and polyester
film with latex adhesive supported by helically wound, spring-steel wire; fibrousglass insulation; polyethylene vapor-barrier film.
1.
2.
3.
4.
F.
Pressure Rating: 4-inch wg positive and 0.5-inch wg negative.
Maximum Air Velocity: 4000 fpm.
Temperature Range: Minus 20 to plus 175 deg F.
Insulation R-Value: Comply with ASHRAE/IESNA 90.1-2004.
Insulated, Flexible Duct: UL 181, Class 1, multiple layers of aluminum laminate
supported by helically wound, spring-steel wire; fibrous-glass insulation;
polyethylene vapor-barrier film.
1.
2.
3.
4.
E.
233300-10
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
Clamps: Nylon strap in sizes 3 through 18 inches, to suit duct size.
DUCT ACCESSORY HARDWARE
A.
Instrument Test Holes: Cast iron or cast aluminum to suit duct material,
including screw cap and gasket. Size to allow insertion of pitot tube and other
testing instruments and of length to suit duct-insulation thickness.
B.
Adhesives: High strength, quick setting, neoprene based, waterproof, and
resistant to gasoline and grease.
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Install duct accessories according to applicable details in SMACNA's "HVAC
Duct Construction Standards - Metal and Flexible" for metal ducts and in
NAIMA AH116, "Fibrous Glass Duct Construction Standards," for fibrous-glass
ducts.
B.
Install duct accessories of materials suited to duct materials; use galvanizedsteel accessories in galvanized-steel and fibrous-glass ducts, stainless-steel
accessories in stainless-steel ducts, and aluminum accessories in aluminum
ducts.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233300-11
AIR DUCT ACCESSORIES
NOVEMBER 24, 2015
C.
Install backdraft dampers at inlet of exhaust fans or exhaust ducts as close as
possible to exhaust fan unless otherwise indicated.
D.
Install volume dampers at points on supply, return, and exhaust systems where
branches extend from larger ducts. Where dampers are installed in ducts
having duct liner, install dampers with hat channels of same depth as liner, and
terminate liner with nosing at hat channel.
1.
2.
Install steel volume dampers in steel ducts.
Install aluminum volume dampers in aluminum ducts.
E.
Set dampers to fully open position before testing, adjusting, and balancing.
F.
Install test holes at fan inlets and outlets and elsewhere as indicated.
G.
Install fire dampers according to UL listing.
H.
Install duct access doors on sides of ducts to allow for inspecting, adjusting,
and maintaining accessories and equipment at the following locations:
1.
Adjacent to and close enough to fire or smoke dampers, to reset or
reinstall fusible links. Access doors for access to fire or smoke dampers
having fusible links shall be pressure relief access doors and shall be
outward operation for access doors installed upstream from dampers and
inward operation for access doors installed downstream from dampers.
I.
Install flexible connectors to connect ducts to equipment.
J.
Connect flexible ducts to metal ducts with draw bands.
K.
Install duct test holes where required for testing and balancing purposes.
3.2
A.
FIELD QUALITY CONTROL
Tests and Inspections:
1.
2.
3.
4.
5.
Operate dampers to verify full range of movement.
Inspect locations of access doors and verify that purpose of access door
can be performed.
Operate fire, smoke, and combination fire and smoke dampers to verify
full range of movement and verify that proper heat-response device is
installed.
Inspect turning vanes for proper and secure installation.
Operate remote damper operators to verify full range of movement of
operator and damper.
END OF SECTION 233300
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233423-1
HVAC POWER VENTILATORS
NOVEMBER 24, 2015
SECTION 233423 - HVAC POWER VENTILATORS
PART 1 - GENERAL
1.1
A.
SUMMARY
This Section includes the following:
1.
2.
1.2
Centrifugal roof ventilators.
Ceiling-mounting ventilators.
SUBMITTALS
A.
Product Data: Include rated capacities, furnished specialties, and accessories for each
type of product indicated and include the following:
B.
Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads,
required clearances, method of field assembly, components, and location and size of
each field connection.
C.
Field quality-control test reports.
D.
Operation and maintenance data.
1.3
QUALITY ASSURANCE
A.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in
NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction,
and marked for intended use.
B.
NEMA Compliance:
standards.
C.
UL Standard: Power ventilators shall comply with UL 705.
Motors and electrical accessories shall comply with NEMA
PART 2 - PRODUCTS
2.1
A.
CENTRIFUGAL ROOF VENTILATORS
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
1.
2.
Acme Engineering & Mfg. Corp.
Aerovent; a Twin City Fan Company.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
233423-2
HVAC POWER VENTILATORS
NOVEMBER 24, 2015
American Coolair Corp.
Ammerman; General Resource Corp.
Breidert Air Products.
Broan Mfg. Co., Inc.
Carnes Company HVAC.
Central Blower Co.
Dayton Electric Manufacturing Co.; a division of W. W. Grainger, Inc.
Delhi Industries Inc.
Greenheck.
Hartzell Fan, Inc.
JencoFan; Div. of Breidert Air Products.
Loren Cook Company.
NuTone Inc.
Penn Ventilation.
Quietaire Corporation.
B.
Description: Direct- or belt-driven centrifugal fans consisting of housing, wheel, fan
shaft, bearings, motor and disconnect switch, drive assembly, curb base, and
accessories.
C.
Housing: Removable, spun-aluminum, dome top and outlet baffle; square, one-piece,
aluminum base with venturi inlet cone.
1.
Hinged Subbase: Galvanized-steel hinged arrangement permitting service and
maintenance.
D.
Fan Wheels: Aluminum hub and wheel with backward-inclined blades.
E.
Belt-Driven Drive Assembly:
features:
1.
2.
3.
4.
F.
Fan Shaft: Turned, ground, and polished steel; keyed to wheel hub.
Shaft Bearings: Permanently lubricated, permanently sealed, self-aligning ball
bearings.
Pulleys: Cast-iron, adjustable-pitch motor pulley.
Fan and motor isolated from exhaust airstream.
Accessories:
1.
2.
3.
4.
G.
Resiliently mounted to housing, with the following
Disconnect Switch: Nonfusible type, with thermal-overload protection mounted
outside fan housing, factory wired through an internal aluminum conduit.
Bird Screens: Removable, 1/2-inch mesh, aluminum or brass wire.
Dampers: Counterbalanced, parallel-blade, backdraft dampers mounted in curb
base; factory set to close when fan stops.
Motorized Dampers: Parallel-blade dampers mounted in curb base with electric
actuator; wired to close when fan stops.
Roof Curbs: Galvanized steel; mitered and welded corners; 1-1/2-inch-thick, rigid,
fiberglass insulation adhered to inside walls; and 1-1/2-inch wood nailer. Size as
required to suit roof opening and fan base.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
1.
2.
3.
4.
5.
6.
7.
2.2
A.
233423-3
HVAC POWER VENTILATORS
NOVEMBER 24, 2015
Configuration: Built-in cant and mounting flange] [Built-in raised cant and
mounting flange.
Overall Height: 16 inches.
Sound Curb: Curb with sound-absorbing insulation matrix.
Pitch Mounting: Manufacture curb for roof slope.
Metal Liner: Galvanized steel.
Mounting Pedestal: Galvanized steel with removable access panel.
Vented Curb: Unlined with louvered vents in vertical sides.
CEILING-MOUNTING VENTILATORS
Manufacturers: Subject to compliance with requirements, provide products by one of
the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
American Coolair Corp.
Ammerman; General Resource Corp.
Breidert Air Products.
Broan Mfg. Co., Inc.
Carnes Company HVAC.
Dayton Electric Manufacturing Co.; a division of W. W. Grainger, Inc.
FloAire.
Greenheck.
JencoFan; Div. of Breidert Air Products.
Loren Cook Company.
NuTone Inc.
Penn Ventilation.
B.
Description: Centrifugal fans designed for installing in ceiling or wall or for concealed
in-line applications.
C.
Housing: Steel, lined with acoustical insulation.
D.
Fan Wheel: Centrifugal wheels directly mounted on motor shaft. Fan shrouds, motor,
and fan wheel shall be removable for service.
E.
Grille: Plastic louvered grille with flange on intake and thumbscrew attachment to fan
housing.
F.
Electrical Requirements: Junction box for electrical connection on housing and
receptacle for motor plug-in.
G.
Accessories:
1.
2.
3.
4.
Solid state speed controller.
Time-Delay Switch: Assembly with single-pole rocker switch, timer, and cover
plate.
Isolation: Rubber-in-shear vibration isolators.
Manufacturer's standard roof jack or wall cap, and transition fittings.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.3
233423-4
HVAC POWER VENTILATORS
NOVEMBER 24, 2015
MOTORS
A.
Comply with requirements in Division 23 Section "Common Motor Requirements for
HVAC Equipment."
B.
Enclosure Type: Totally enclosed, fan cooled.
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Install power ventilators level and plumb.
B.
Secure roof-mounting fans to roof curbs with cadmium-plated hardware.
Division 07 Section "Roof Accessories" for installation of roof curbs.
C.
Ceiling Units: Suspend units from structure; use steel wire or metal straps.
D.
Install units with clearances for service and maintenance.
E.
Label units according to requirements specified in Division 23 Section "Identification for
HVAC Piping and Equipment."
F.
Duct installation and connection requirements are specified in other Division 23
Sections. Drawings indicate general arrangement of ducts and duct accessories.
Make final duct connections with flexible connectors. Flexible connectors are specified
in Division 23 Section "Air Duct Accessories."
G.
Install ducts adjacent to power ventilators to allow service and maintenance.
H.
Ground equipment according to Division 26 Section "Grounding and Bonding for
Electrical Systems."
I.
Connect wiring according to Division 26 Section "Low-Voltage Electrical Power
Conductors and Cables."
3.2
A.
Refer to
FIELD QUALITY CONTROL
Perform the following field tests and inspections and prepare test reports:
1.
2.
3.
Verify that shipping, blocking, and bracing are removed.
Verify that unit is secure on mountings and supporting devices and that
connections to ducts and electrical components are complete. Verify that proper
thermal-overload protection is installed in motors, starters, and disconnect
switches.
Verify that cleaning and adjusting are complete.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
4.
5.
6.
7.
8.
9.
10.
11.
B.
233423-5
HVAC POWER VENTILATORS
NOVEMBER 24, 2015
Disconnect fan drive from motor, verify proper motor rotation direction, and verify
fan wheel free rotation and smooth bearing operation. Reconnect fan drive
system, align and adjust belts, and install belt guards.
Adjust belt tension.
Adjust damper linkages for proper damper operation.
Verify lubrication for bearings and other moving parts.
Verify that manual and automatic volume control and fire and smoke dampers in
connected ductwork systems are in fully open position.
Disable automatic temperature-control operators, energize motor and adjust fan
to indicated rpm, and measure and record motor voltage and amperage.
Shut unit down and reconnect automatic temperature-control operators.
Remove and replace malfunctioning units and retest as specified above.
Test and adjust controls and safeties. Replace damaged and malfunctioning controls
and equipment.
END OF SECTION 233423
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233713-1
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
SECTION 233713 - DIFFUSERS, REGISTERS, AND GRILLES
PART 1 - GENERAL
1.1
A.
SUMMARY
Section Includes:
1.
2.
3.
4.
5.
6.
7.
8.
B.
Related Sections:
1.
2.
1.2
A.
Division 08 Section "Louvers and Vents" for fixed and adjustable louvers and wall
vents, whether or not they are connected to ducts.
Division 23 Section "Air Duct Accessories" for fire and smoke dampers and
volume-control dampers not integral to diffusers, registers, and grilles.
SUBMITTALS
Product Data: For each type of product indicated, include the following:
1.
2.
B.
Rectangular and square ceiling diffusers.
Perforated diffusers.
Louver face diffusers.
Linear bar diffusers.
Linear slot diffusers.
Adjustable bar registers and grilles.
Fixed face registers and grilles.
Linear bar grilles.
Data Sheet: Indicate materials of construction, finish, and mounting details; and
performance data including throw and drop, static-pressure drop, and noise
ratings.
Diffuser, Register, and Grille Schedule: Indicate drawing designation, room
location, quantity, model number, size, and accessories furnished.
Samples: For each exposed product and for each color and texture specified.
PART 2 - PRODUCTS
2.1
A.
CEILING DIFFUSERS
Rectangular and Square Ceiling Diffusers:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
3.
4.
5.
6.
7.
8.
9.
10.
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
Hart & Cooley Inc.
Krueger.
METALAIRE, Inc.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Devices shall be specifically designed for variable-air-volume flows.
Material: Aluminum.
Finish: Baked enamel, white.
Face Size: 24 by 24 inches or 12 by 12 inches.
Face Style: Plaque.
Mounting: Surface or T-bar.
Pattern: Adjustable.
Dampers: Radial opposed blade.
Accessories:
a.
B.
233713-2
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
Plaster ring.
Perforated Diffuser:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
2.
3.
4.
5.
6.
7.
8.
9.
Air Research Diffuser Products, Inc.
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
Hart & Cooley Inc.
Krueger.
METALAIRE, Inc.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Warren Technology.
Devices shall be specifically designed for variable-air-volume flows.
Material: Steel backpan and pattern controllers, with aluminum face.
Finish: Baked enamel, white.
Face Size: 24 by 12 inches.
Duct Inlet: Round or Square.
Face Style: Flush.
Mounting: Surface or T-bar.
Pattern Controller: None.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
C.
Louver Face Diffuser:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
2.
3.
4.
5.
6.
7.
8.
9.
A.
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
METALAIRE, Inc.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Devices shall be specifically designed for variable-air-volume flows.
Material: Steel.
Finish: Baked enamel, white.
Face Size: Refer to drawings.
Mounting: Surface.
Pattern: Minimum of Two-way, Two-way corner or Three-way, Four-way,
Adjustable core style.
Dampers: Radial opposed blade.
Accessories:
a.
b.
2.2
233713-3
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
Square to round neck adaptor.
Adjustable pattern vanes.
CEILING LINEAR SLOT OUTLETS
Linear Bar Diffuser:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
2.
3.
4.
Air Research Diffuser Products, Inc.
Anemostat Products; a Mestek company.
Carnes.
Dayus Register & Grille Inc.
Hart & Cooley Inc.
Krueger.
METALAIRE, Inc.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Devices shall be specifically designed for variable-air-volume flows.
Material: Aluminum.
Finish: Baked enamel, white.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
5.
6.
7.
8.
9.
B.
Wide Core Spacing Arrangement: 1/8-inch-thick blades spaced 1/2 inch apart,
zero (0)-degree deflection.
Two-Way Deflection Vanes: Extruded construction fixed louvers with removable
core.
Frame: 3/4 inch wide.
Mounting: Countersunk screw.
Damper Type: Adjustable opposed-blade assembly.
Linear Slot Diffuser:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
2.3
A.
233713-4
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
Air Research Diffuser Products, Inc.
Anemostat Products; a Mestek company.
Carnes.
Hart & Cooley Inc.
Krueger.
METALAIRE, Inc.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Devices shall be specifically designed for variable-air-volume flows.
Material - Shell: Aluminum.
Material - Pattern Controller and Tees: Aluminum.
Finish - Face and Shell: Baked enamel, black.
Finish - Pattern Controller: Baked enamel, black.
Finish - Tees: Baked enamel, color selected by Architect.
Slot Width: 1 inch.
Number of Slots: Refer to air device schedule.
Length: 48 inches.
Accessories: Plaster frame or T-bar slot.
REGISTERS AND GRILLES
Adjustable Bar Register:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
Dayus Register & Grille Inc.
Hart & Cooley Inc.
Krueger.
METALAIRE, Inc.
Nailor Industries Inc.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
i.
j.
k.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Rear-blade gang operator.
Adjustable Bar Grille:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
2.
3.
4.
5.
6.
7.
8.
C.
Price Industries.
Titus.
Tuttle & Bailey.
Material: Steel.
Finish: Baked enamel, white.
Face Blade Arrangement: Horizontal spaced 3/4 inch apart.
Core Construction: Integral.
Rear-Blade Arrangement: Vertical spaced 1/2 inch apart.
Frame: 1-1/4 inches wide.
Mounting: Countersunk screw.
Damper Type: Adjustable opposed blade or NRTL listed, opposed blade, spring
closing, and with fusible link for 160 deg F for applications in a rated wall.
Accessories:
a.
B.
233713-5
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
Dayus Register & Grille Inc.
Hart & Cooley Inc.
Krueger.
METALAIRE, Inc.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Material: Steel.
Finish: Baked enamel, white.
Face Blade Arrangement: Horizontal spaced 3/4 inch apart.
Core Construction: Integral.
Rear-Blade Arrangement: Vertical spaced 1/2 inch apart.
Frame: 1-1/4 inches wide.
Mounting: Countersunk screw.
Fixed Face Grille:
1.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
Dayus Register & Grille Inc.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
e.
f.
g.
h.
i.
j.
2.
3.
4.
5.
6.
7.
D.
Material: Steel.
Finish: Baked enamel, white.
Face Arrangement: Perforated core.
Core Construction: Integral.
Frame: 1-1/4 inches wide.
Mounting: Countersunk screw.
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
2.
3.
4.
5.
6.
7.
A-J Manufacturing Co., Inc.
Anemostat Products; a Mestek company.
Carnes.
Dayus Register & Grille Inc.
Hart & Cooley Inc.
Krueger.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Material: Steel.
Finish: Baked enamel, white.
Face Arrangement: Perforated core.
Distribution plenum.
a.
A.
Hart & Cooley Inc.
Krueger.
Nailor Industries Inc.
Price Industries.
Titus.
Tuttle & Bailey.
Linear Bar Grille:
1.
2.4
233713-6
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
Internal insulation.
Frame: 1-1/4 inches wide.
Mounting: Lay in.
SOURCE QUALITY CONTROL
Verification of Performance: Rate diffusers, registers, and grilles according to
ASHRAE 70, "Method of Testing for Rating the Performance of Air Outlets and Inlets."
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
233713-7
DIFFUSERS, REGISTERS, AND GRILLES
NOVEMBER 24, 2015
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Install diffusers, registers, and grilles level and plumb.
B.
Ceiling-Mounted Outlets and Inlets: Drawings indicate general arrangement of ducts,
fittings, and accessories. Air outlet and inlet locations have been indicated to achieve
design requirements for air volume, noise criteria, airflow pattern, throw, and pressure
drop. Make final locations where indicated, as much as practical. For units installed in
lay-in ceiling panels, locate units in the center of panel. Where architectural features or
other items conflict with installation, notify Architect for a determination of final location.
C.
Install diffusers, registers, and grilles with airtight connections to ducts and to allow
service and maintenance of dampers, air extractors, and fire dampers.
3.2
A.
ADJUSTING
After installation, adjust diffusers, registers, and grilles to air patterns indicated, or as
directed, before starting air balancing.
END OF SECTION 233713
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
237413-1
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
SECTION 237413 - PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
UNITS
PART 1 - GENERAL
1.1
A.
1.2
A.
RELATED DOCUMENTS
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 01 Specification Sections, apply to this
Section.
SUMMARY
This Section includes packaged, outdoor, central-station air-handling units
(rooftop units) with the following components and accessories:
1.
2.
3.
4.
5.
6.
7.
1.3
Direct-expansion cooling.
Heat-pump refrigeration components.
Hot-gas reheat.
Electric-heating coils.
Outdoor- and return-air damper section.
Integral, space temperature controls.
Roof curbs.
DEFINITIONS
A.
DDC: Direct-digital controls.
B.
ECM: Electrically commutated motor.
C.
RTU: Rooftop unit. As used in this Section, this abbreviation means packaged,
outdoor, central-station air-handling units. This abbreviation is used regardless
of whether the unit is mounted on the roof or on a concrete base on ground.
D.
Supply-Air Fan: The fan providing supply air to conditioned space. "Supply air"
is defined as the air entering a space from air-conditioning, heating, or
ventilating apparatus.
E.
Supply-Air Refrigerant Coil: Refrigerant coil in the supply-air stream to absorb
heat (provide cooling) during cooling operations and to reject heat (provide
heating) during heating operations. "Supply air" is defined as the air entering a
space from air-conditioning, heating, or ventilating apparatus.
1.4
A.
PERFORMANCE REQUIREMENTS
Delegated Design: Design RTU supports to comply with wind and seismic
performance requirements, including comprehensive engineering analysis by a
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
237413-2
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
qualified professional engineer, using performance requirements and design
criteria indicated.
B.
Wind-Restraint Performance:
1.
2.
1.5
Basic Wind Speed: 140 MPH.
Minimum 10 lb/sq. ft multiplied by the maximum area of the mechanical
component projected on a vertical plane that is normal to the wind
direction, and 45 degrees either side of normal.
SUBMITTALS
A.
Product Data: Include manufacturer's technical data for each RTU, including
rated capacities, dimensions, required clearances, characteristics, furnished
specialties, and accessories.
B.
Shop Drawings: Detail equipment assemblies and indicate dimensions,
weights, loads, required clearances, method of field assembly, components,
and location and size of each field connection.
1.
C.
Delegated-Design Submittal: For RTU supports indicated to comply with
performance requirements and design criteria, including analysis data signed
and sealed by the qualified professional engineer responsible for their
preparation.
1.
2.
3.
D.
Design Calculations: Calculate requirements for selecting vibration
isolators and seismic restraints and for designing vibration isolation
bases.
Detail mounting, securing, and flashing of roof curb to roof structure.
Indicate coordinating requirements with roof membrane system.
Wind-Restraint Details: Detail fabrication and attachment of wind and
seismic restraints and snubbers. Show anchorage details and indicate
quantity, diameter, and depth of penetration of anchors.
Manufacturer Wind Loading Qualification Certification: Submit certification that
specified equipment will withstand wind forces identified in "Performance
Requirements" Article and in Division 23 Section "Vibration and Seismic
Controls for HVAC Piping and Equipment."
1.
2.
3.
E.
Wiring Diagrams: Power, signal, and control wiring.
Basis for Certification: Indicate whether withstand certification is based
on actual test of assembled components or on calculations.
Dimensioned Outline Drawings of Equipment Unit: Identify center of wind
force and locate and describe mounting and anchorage provisions.
Detailed description of equipment anchorage devices on which the
certification is based and their installation requirements.
Coordination Drawings: Plans and other details, drawn to scale, on which the
following items are shown and coordinated with each other, using input from
installers of the items involved:
1.
Structural members to which RTUs will be attached.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.
3.
237413-3
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Roof openings
Roof curbs and flashing.
F.
Field quality-control test reports.
G.
Operation and Maintenance Data: For RTUs to include in emergency,
operation, and maintenance manuals.
H.
Warranty: Special warranty specified in this Section.
1.6
A.
QUALITY ASSURANCE
ARI Compliance:
1.
2.
B.
Comply with ARI 210/240 and ARI 340/360 for testing and rating energy
efficiencies for RTUs.
Comply with ARI 270 for testing and rating sound performance for RTUs.
ASHRAE Compliance:
1.
2.
3.
Comply with ASHRAE 15 for refrigeration system safety.
Comply with ASHRAE 33 for methods of testing cooling and heating coils.
Comply with applicable requirements in ASHRAE 62.1-2004, Section 5 "Systems and Equipment" and Section 7 - "Construction and Startup."
C.
ASHRAE/IESNA 90.1-2004 Compliance:
Applicable requirements in
ASHRAE/IESNA 90.1-2004, Section 6 - "Heating, Ventilating, and AirConditioning."
D.
NFPA Compliance: Comply with NFPA 90A and NFPA 90B.
E.
UL Compliance: Comply with UL 1995.
F.
Electrical Components, Devices, and Accessories: Listed and labeled as
defined in NFPA 70, Article 100, by a testing agency acceptable to authorities
having jurisdiction, and marked for intended use.
1.7
A.
WARRANTY
Special Warranty: Manufacturer's standard form in which manufacturer agrees
to replace components of RTUs that fail in materials or workmanship within
specified warranty period.
1.
2.
3.
Warranty Period for Compressors: Manufacturer's standard, but not less
than five years from date of Substantial Completion.
Warranty Period for Gas Furnace Heat Exchangers: Manufacturer's
standard, but not less than five years from date of Substantial
Completion.
Warranty Period for Solid-State Ignition Modules:
Manufacturer's
standard, but not less than three years from date of Substantial
Completion.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
4.
1.8
A.
237413-4
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Warranty Period for Control Boards: Manufacturer's standard, but not
less than three years from date of Substantial Completion.
EXTRA MATERIALS
Furnish extra materials described below that match products installed and that
are packaged with protective covering for storage and identified with labels
describing contents.
1.
2.
Fan Belts: One set for each belt-driven fan.
Filters: One set of filters for each unit.
PART 2 - PRODUCTS
2.1
A.
MANUFACTURERS
Manufacturers: Subject to compliance with requirements, provide products by
one of the following:
1.
2.
3.
4.
5.
6.
7.
2.2
AAON, Inc.
Addison Products Company.
Carrier Corporation.
Lennox Industries Inc.
McQuay International.
Trane; American Standard Companies, Inc.
YORK International Corporation.
CASING
A.
General Fabrication Requirements for Casings: Formed and reinforced doublewall insulated panels, fabricated to allow removal for access to internal parts
and components, with joints between sections sealed.
B.
Exterior Casing Material: Galvanized steel with factory-painted finish, with
pitched roof panels and knockouts with grommet seals for electrical and piping
connections and lifting lugs.
1.
C.
Inner Casing Fabrication Requirements:
1.
D.
Exterior Casing Thickness: 0.052 inch thick.
Inside Casing: Galvanized steel, 0.034 inch thick, perforated 40 percent
free area.
Casing Insulation and Adhesive: Comply with NFPA 90A or NFPA 90B.
1.
2.
Materials: ASTM C 1071, Type I.
Thickness: 1 inch.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.
4.
E.
2.
3.
2.3
Liner materials shall have air-stream surface coated with an erosion- and
temperature-resistant coating or faced with a plain or coated fibrous mat
or fabric.
Liner Adhesive: Comply with ASTM C 916, Type I.
Condensate Drain Pans: Formed sections of stainless-steel sheet, a minimum
of 2 inches deep, and complying with ASHRAE 62.1-2004.
1.
F.
237413-5
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Double-Wall Construction: Fill space between walls with foam insulation
and seal moisture tight.
Drain Connections: Threaded nipple both sides of drain pan.
Pan-Top Surface Coating: Corrosion-resistant compound.
Airstream Surfaces: Surfaces in contact with the airstream shall comply with
requirements in ASHRAE 62.1-2004.
FANS
A.
Direct-Driven Supply-Air Fans: Double width, forward curved, centrifugal; with
permanently lubricated, motor resiliently mounted in the fan inlet. Aluminum or
painted-steel wheels, and galvanized- or painted-steel fan scrolls.
B.
Belt-Driven Supply-Air Fans: Double width, forward curved, centrifugal; with
permanently lubricated, single-speed motor installed on an adjustable fan base
resiliently mounted in the casing. Aluminum or painted-steel wheels, and
galvanized- or painted-steel fan scrolls.
C.
Condenser-Coil Fan: Propeller, mounted on shaft of permanently lubricated
motor.
D.
Seismic Fabrication Requirements: Fabricate fan section, internal mounting
frame and attachment to fans, fan housings, motors, casings, accessories, and
other fan section components with reinforcement strong enough to withstand
seismic forces defined in Division 23 Section "Vibration and Seismic Controls
for HVAC Piping and Equipment" when fan-mounted frame and RTU-mounted
frame are anchored to building structure.
E.
Fan Motor: Comply with requirements in Division 23 Section "Common Motor
Requirements for HVAC Equipment."
2.4
A.
COILS
Supply-Air Refrigerant Coil:
1.
2.
3.
4.
Aluminum or Copper-plate fin and seamless internally grooved copper
tube in steel casing with equalizing-type vertical distributor.
Polymer strip shall prevent all copper coil from contacting steel coil frame
or condensate pan.
Coil Split: Interlaced.
Baked phenolic coating.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
5.
B.
Condensate Drain Pan: Stainless steel with corrosion-resistant coating
formed with pitch and drain connections complying with ASHRAE 62.12004.
Hot-Gas Reheat Refrigerant Coil:
1.
2.
3.
C.
Aluminum or Copper-plate fin and seamless internally grooved copper
tube in steel casing with equalizing-type vertical distributor.
Polymer strip shall prevent all copper coil from contacting steel coil frame
or condensate pan.
Baked phenolic coating.
Electric-Resistance Heating:
1.
2.
3.
4.
Open Heating Elements: Resistance wire of 80 percent nickel and 20
percent chromium, supported and insulated by floating ceramic bushings
recessed into casing openings, fastened to supporting brackets, and
mounted in galvanized-steel frame. Terminate elements in stainless-steel
machine-staked terminals secured with stainless-steel hardware.
Overtemperature Protection: Disk-type, automatically reset, thermalcutout, safety device; serviceable through terminal box.
Overcurrent Protection: Manual-reset thermal cutouts, factory wired in
each heater stage.
Control Panel: Unit mounted with disconnecting means and overcurrent
protection. Include the following controls:
a.
b.
c.
d.
e.
2.5
237413-6
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Magnetic contactors.
Step Controller: Pilot lights and override toggle switch for each
step.
SCR Controller: Pilot lights operate on load ratio, a minimum of five
steps.
Time-delay relay.
Airflow proving switch.
REFRIGERANT CIRCUIT COMPONENTS
A.
Number of Refrigerant Circuits: Refer to unit specifications.
B.
Compressor: Refer to unit specifications.
C.
Refrigeration Specialties:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Refrigerant: R-407C or R-410A.
Expansion valve with replaceable thermostatic element.
Refrigerant filter/dryer.
Manual-reset high-pressure safety switch.
Automatic-reset low-pressure safety switch.
Minimum off-time relay.
Automatic-reset compressor motor thermal overload.
Brass service valves installed in compressor suction and liquid lines.
Low-ambient kit high-pressure sensor.
Hot-gas reheat solenoid valve with a replaceable magnetic coil.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
11.
12.
2.6
A.
A.
Minimum arrestance according to ASHRAE 52.1, and a minimum efficiency
reporting value (MERV) according to ASHRAE 52.2.
A.
2.9
Glass Fiber: Minimum 80 percent arrestance, and MERV 5.
Pleated: Minimum 90 percent arrestance, and MERV 7.
DAMPERS
Outdoor- and Return-Air Mixing Dampers:
Parallel- or opposed-blade
galvanized-steel dampers mechanically fastened to cadmium plated for
galvanized-steel operating rod in reinforced cabinet. Connect operating rods
with common linkage and interconnect linkages so dampers operate
simultaneously.
1.
2.8
Hot-gas bypass solenoid valve with a replaceable magnetic coil.
Four-way reversing valve with a replaceable magnetic coil, thermostatic
expansion valves with bypass check valves, and a suction line
accumulator.
AIR FILTRATION
1.
2.
2.7
237413-7
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Damper Motor: Modulating with adjustable minimum position.
ELECTRICAL POWER CONNECTION
Provide for single connection of power to unit with unit-mounted disconnect
switch accessible from outside unit and control-circuit transformer with built-in
overcurrent protection.
CONTROLS
A.
Control equipment and sequence of operation are specified in Division 23
Section "Instrumentation and Control for HVAC."
B.
Basic Unit Controls:
1.
2.
Control-voltage transformer.
Wall-mounted thermostat or sensor with the following features:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
Heat-cool-off switch.
Fan on-auto switch.
Fan-speed switch.
Automatic changeover.
Adjustable deadband.
Exposed set point.
Exposed indication.
Degree F indication.
Unoccupied-period-override push button.
Data entry and access port to input temperature and humidity set
points, occupied and unoccupied periods, and output room
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
237413-8
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
temperature and humidity, supply-air temperature, operating mode,
and status.
3.
Wall-mounted humidistat or sensor with the following features:
a.
b.
4.
Remote Wall-Mounted Annunciator Panel for Each Unit:
a.
b.
C.
Exposed set point.
Exposed indication.
DDC controller or programmable timer and interface with HVAC
instrumentation and control system.
Digital display of outdoor-air temperature, supply-air temperature,
return-air temperature, economizer damper position, indoor-air
quality, and control parameters.
Electronic Controller:
1.
2.
Controller shall have volatile-memory backup.
Safety Control Operation:
a.
b.
c.
d.
e.
Smoke Detectors: Stop fan and close outdoor-air damper if smoke
is detected. Provide additional contacts for alarm interface to fire
alarm control panel.
Firestats: Stop fan and close outdoor-air damper if air greater than
130 deg F enters unit. Provide additional contacts for alarm
interface to fire alarm control panel.
Fire Alarm Control Panel Interface: Provide control interface to
coordinate with operating sequence described in Division 28
Section "Fire Detection and Alarm."
Low-Discharge Temperature: Stop fan and close outdoor-air
damper if supply air temperature is less than 40 deg F.
Defrost Control for Condenser Coil: Pressure differential switch to
initiate defrost sequence.
3.
Scheduled Operation: Occupied and unoccupied periods on 7/365-day
clock with a minimum of two programmable periods per day.
4.
Unoccupied Period:
a.
b.
c.
5.
Supply Fan Operation:
a.
b.
6.
Heating Setback: 10 deg F.
Cooling Setback: System off.
Override Operation: Two hours.
Occupied Periods: Run fan continuously.
Unoccupied Periods: Cycle fan to maintain setback temperature.
Refrigerant Circuit Operation:
a.
Occupied Periods: Cycle or stage compressors, and operate hotgas bypass to match compressor output to cooling load to maintain
room or discharge temperature and humidity. Cycle condenser
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
b.
c.
7.
b.
b.
Unoccupied Periods: Close outdoor-air damper and open return-air
damper.
Outdoor-Airflow Monitor: Accuracy maximum plus or minus 5
percent within 15 and 100 percent of total outdoor air. Monitor
microprocessor shall adjust for temperature, and output shall range
from 2- to 10-V dc.
Carbon Dioxide Sensor Operation:
a.
b.
D.
Occupied Periods: Cycle/Stage coil to maintain room temperature.
Unoccupied Periods:
Energize coil to maintain setback
temperature.
Outdoor-Air Damper Operation:
a.
10.
Occupied Periods: Humidistat opens hot-gas valve to provide hotgas reheat, and cycles compressor.
Unoccupied Periods: Reheat not required.
Electric-Heating-Coil Operation:
a.
b.
9.
fans to maintain maximum hot-gas pressure. Operate low-ambient
control kit to maintain minimum hot-gas pressure.
Unoccupied Periods: Cycle compressors and condenser fans for
heating to maintain setback temperature.
Switch reversing valve for heating or cooling mode on air-to-air heat
pump.
Hot-Gas Reheat-Coil Operation:
a.
8.
237413-9
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Occupied Periods: Reset minimum outdoor-air ratio down to
minimum 10 percent to maintain maximum 800-ppm concentration.
Unoccupied Periods: Close outdoor-air damper and open return-air
damper.
Interface Requirements for HVAC Instrumentation and Control System:
1.
2.
3.
Interface relay for scheduled operation.
Interface relay to provide indication of fault at the central workstation and
diagnostic code storage.
Provide BACnet or LonWorks compatible interface for central HVAC
control workstation for the following:
a.
b.
c.
d.
e.
f.
g.
h.
i.
Adjusting set points.
Monitoring supply fan start, stop, and operation.
Inquiring data to include outdoor-air damper position, supply- and
room-air temperature and humidity.
Monitoring occupied and unoccupied operations.
Monitoring constant and variable motor loads.
Monitoring variable-frequency drive operation.
Monitoring cooling load.
Monitoring economizer cycles.
Monitoring air-distribution static pressure and ventilation air volume.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
2.10
237413-10
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
ACCESSORIES
A.
Duplex, 115-V, ground-fault-interrupter outlet with 15-A overcurrent protection.
Include transformer if required. Outlet shall be energized even if the unit main
disconnect is open.
B.
Low-ambient kit using staged condenser fans for operation down to 0 deg F.
C.
Filter differential pressure switch with sensor tubing on either side of filter. Set
for final filter pressure loss.
D.
Coil guards of painted, galvanized-steel wire.
E.
Hail guards of galvanized steel, painted to match casing.
2.11
ROOF CURBS
A.
Roof curbs with vibration isolators and wind restraints are specified in
Division 23 Section "Vibration Controls for HVAC Piping and Equipment."
B.
Materials:
Galvanized steel with corrosion-protection coating, watertight
gaskets, and factory-installed wood nailer; complying with NRCA standards.
1.
Curb Insulation and Adhesive: Comply with NFPA 90A or NFPA 90B.
a.
b.
2.
Materials: ASTM C 1071, Type I or II.
Thickness: 1 inch.
Application: Factory applied with adhesive and mechanical fasteners to
the internal surface of curb.
a.
b.
c.
d.
Liner Adhesive: Comply with ASTM C 916, Type I.
Mechanical Fasteners: Galvanized steel, suitable for adhesive
attachment, mechanical attachment, or welding attachment to duct
without damaging liner when applied as recommended by
manufacturer and without causing leakage in cabinet.
Liner materials applied in this location shall have air-stream surface
coated with a temperature-resistant coating or faced with a plain or
coated fibrous mat or fabric depending on service air velocity.
Liner Adhesive: Comply with ASTM C 916, Type I.
C.
Curb Height: 14 inches.
D.
Wind Restraints: Metal brackets compatible with the curb and casing, painted
to match RTU, used to anchor unit to the curb, and designed for loads at
Project site. Comply with requirements in Division 23 Section "Vibration
Controls for HVAC Piping and Equipment" for wind-load requirements.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
237413-11
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine substrates, areas, and conditions, with Installer present, for
compliance with requirements for installation tolerances and other conditions
affecting performance of RTUs.
B.
Examine roughing-in for RTUs to verify actual locations of piping and duct
connections before equipment installation.
C.
Examine roofs for suitable conditions where RTUs will be installed.
D.
Proceed with installation only after unsatisfactory conditions have been
corrected.
3.2
INSTALLATION
A.
Roof Curb: Install on roof structure or concrete base, level and secure,
according to NRCA's "Low-Slope Membrane Roofing Construction Details
Manual," Illustration "Raised Curb Detail for Rooftop Air Handling Units and
Ducts." Install RTUs on curbs and coordinate roof penetrations and flashing
with roof construction specified in Division 07 Section "Roof Accessories."
Secure RTUs to upper curb rail, and secure curb base to roof framing or
concrete base with anchor bolts.
B.
Unit Support: Install unit level on structural curbs pilings. Coordinate wall
penetrations and flashing with wall construction. Secure RTUs to structural
support with anchor bolts.
C.
Install wind restraints according to manufacturer's written instructions. Wind
restrained vibration isolation roof-curb rails are specified in Division 23 Section
"Vibration and Seismic Controls for HVAC Piping and Equipment."
3.3
CONNECTIONS
A.
Install condensate drain, minimum connection size, with trap and indirect
connection to nearest roof drain or area drain.
B.
Install piping adjacent to RTUs to allow service and maintenance.
C.
Duct installation requirements are specified in other Division 23 Sections.
Drawings indicate the general arrangement of ducts. The following are specific
connection requirements:
1.
2.
3.
4.
Install ducts to termination at top of roof curb.
Remove roof decking only as required for passage of ducts. Do not cut
out decking under entire roof curb.
Connect supply ducts to RTUs with flexible duct connectors specified in
Division 23 Section "Air Duct Accessories."
Install return-air duct continuously through roof structure.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
3.4
237413-12
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
FIELD QUALITY CONTROL
A.
Manufacturer's Field Service:
Engage a factory-authorized service
representative to inspect, test, and adjust components, assemblies, and
equipment installations, including connections. Report results in writing.
B.
Perform tests and inspections and prepare test reports.
1.
C.
Tests and Inspections:
1.
2.
3.
4.
D.
3.5
Manufacturer's Field Service: Engage a factory-authorized service
representative to inspect components, assemblies, and equipment
installations, including connections, and to assist in testing. Report
results in writing.
After installing RTUs and after electrical circuitry has been energized, test
units for compliance with requirements.
Inspect for and remove shipping bolts, blocks, and tie-down straps.
Operational Test: After electrical circuitry has been energized, start units
to confirm proper motor rotation and unit operation.
Test and adjust controls and safeties.
Replace damaged and
malfunctioning controls and equipment.
Remove and replace malfunctioning units and retest as specified above.
STARTUP SERVICE
A.
Engage a factory-authorized service representative to perform startup service.
B.
Complete installation and startup checks according to manufacturer's written
instructions and do the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Inspect for visible damage to unit casing.
Inspect for visible damage to compressor, coils, and fans.
Inspect internal insulation.
Verify that labels are clearly visible.
Verify that clearances have been provided for servicing.
Verify that controls are connected and operable.
Verify that filters are installed.
Clean condenser coil and inspect for construction debris.
Remove packing from vibration isolators.
Verify lubrication on fan and motor bearings.
Inspect fan-wheel rotation for movement in correct direction without
vibration and binding.
Adjust fan belts to proper alignment and tension.
Start unit according to manufacturer's written instructions.
a.
b.
c.
Start refrigeration system.
Do not operate below recommended low-ambient temperature.
Complete startup sheets and attach copy with Contractor's startup
report.
PORSCHE OF NORTH HOUSTON
HOUSTON, TX
PRAXIS3 ARCHITECTURE CORP-15155
14.
15.
16.
17.
18.
19.
Inspect and record performance of interlocks and protective devices;
verify sequences.
Operate unit for an initial period as recommended or required by
manufacturer.
Calibrate thermostats.
Adjust and inspect high-temperature limits.
Inspect outdoor-air dampers for proper stroke and interlock with return-air
dampers.
Start refrigeration system and measure and record the following when
ambient is a minimum of 15 deg F above return-air temperature:
a.
b.
c.
d.
20.
21.
3.6
Supply-air volume.
Return-air volume.
Outdoor-air intake volume.
Simulate maximum cooling demand and inspect the following:
a.
b.
23.
Coil leaving-air, dry- and wet-bulb temperatures.
Coil entering-air, dry- and wet-bulb temperatures.
Outdoor-air, dry-bulb temperature.
Outdoor-air-coil, discharge-air, dry-bulb temperature.
Inspect controls for correct sequencing of heating, mixing dampers,
refrigeration, and normal and emergency shutdown.
Measure and record the following minimum and maximum airflows. Plot
fan volumes on fan curve.
a.
b.
c.
22.
237413-13
PACKAGED, OUTDOOR, CENTRAL-STATION AIR-HANDLING
NOVEMBER 24, 2015
Compressor refrigerant suction and hot-gas pressures.
Short circuiting of air through condenser coil or from condenser fans
to outdoor-air intake.
After startup and performance testing and prior to Substantial Completion,
replace existing filters with new filters.
CLEANING AND ADJUSTING
A.
Occupancy Adjustments: When requested within 12 months of date of
Substantial Completion, provide on-site assistance in adjusting system to suit
actual occupied conditions. Provide up to two visits to site during other-thannormal occupancy hours for this purpose.
B.
After completing system installation and testing, adjusting, and balancing RTU
and air-distribution systems, clean filter housings and install new filters.
3.7
A.
DEMONSTRATION
Engage a factory-authorized service representative to train Owner's
maintenance personnel to adjust, operate, and maintain RTUs. Refer to
Division 01 Section "Demonstration and Training."
END OF SECTION 237413