14-71 IFB REBID Wilson & Robinson Hall Air Handler Project
SPECIFICATION
Air Handling Units Pre-Purchase
Robinson and Wilson Halls
Rowan University
201 Mullica Hill Road
Glassboro, NJ 08028
Professional:
ENTECH ENGINEERING, INC.
4 South Fourth Street
P.O. Box 32
Reading, PA 19603
Telephone: 610-373-6667
Fax: 610-373-7537
www.entecheng.com
Entech Project #: 2321.02
March 21, 2014
1
14-71 IFB REBID Wilson & Robinson Hall Air Handler Project
ROWAN UNIVERSITY
ROBINSON HALL – AHU-2 AND WILSON HALL – AHU-2 AND AHU-3
Entech #2321.02
SECTION 237313-1 - MODULAR INDOOR CENTRAL-STATION AIR-HANDLING UNITS
PRE-PURCHASE SPECIFICATION
PROJECT INFORMATION
Project Location:
Rowan University
201 Mullica Hill Road
Glassboro, NJ 08028
Owner:
Owner Representative:
Rowan University
Anthony Kula – Project Manager
Engineer:
Entech Engineering, Inc.
4 South 4th Street
Reading, PA 19602
CONTRACT DESCRIPTION
Contract Type:
A single prime contract based on Stipulate Price as described on the Bid Proposal
Form.
PART 1 - GENERAL
1.1
SCOPE
A.
Supply factory test and start-up indoor air handling units including operator training by factorytrained instructors. The air handling units will be installed in Robinson Hall (AHU-2) and
Wilson Hall (AHU-2 and AHU-3) on the campus of Rowan University (installation of the air
handling units is by others). The work covered by and included in this specification consist of
furnishing all items listed below:
1.
2.
3.
4.
5.
1.2
Modular indoor central station air handling units and components.
Computer controls and control connections.
Chilled water connections.
Variable speed controllers to be mounted by others.
Electrical power connections.
BIDDERS
A.
Equipment specified herein is for the use of Rowan University.
B.
Bidders shall submit a complete bid proposal for all equipment, materials, technical costs,
deliveries, warranties, and manufacturer’s field services as specified herein. Bid proposal shall
include manufacturer’s product submittal for each air handling unit which indicates
components, assembly, dimensions, weights and loads, required clearances, and location and
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Entech #2321.02
size of field connections. Submittals shall also include rated capacities, specialties, and
accessories, electrical requirements and wiring diagrams.
Indicate equipment, piping
connections and electrical connections and controls required for complete system. The bidder
shall certify that the products meet or exceed specified requirements including components not
produced by the manufacturer.
C.
Bidders must supply all equipment pieces listed in this specification. No exceptions and/or
exclusions will be permitted. Failure to submit the entire bid items will cause the submitted bid
to be rejected.
Bidders may not supply any substitutions and/or alternates of any kind on equipment
manufacturers and/or options for determining the bid. Failure to comply will cause the
submitted bid to be rejected.
Air handling units bids shall be separated by building (Robinson Hall – AHU-2 and Wilson Hall
– AHU-2 and AHU-3) as indicated on the bid form. The University shall provide separate
purchase orders for each building. Air handling units for both buildings shall be awarded to a
single bidder.
The bid will be awarded to the responsible bidder with the lowest Bid Total amount and
compliance to the specifications as verified by the submitted manufacturer’s product submittal.
1.3
WORK BY OWNER
A.
1.4
Rowan University will award separate contract(s) for the installation of air handling units.
MANUFACTURERS
A.
Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
1.
2.
1.5
Daikin/McQuay International
Trane; American Standard Inc.
YORK International Corporation/JCI.
SUBMITTALS
A.
Shop Drawings
1.
B.
Upon receipt of a purchase order, the manufacturer shall then make any corrections
required by the Owner or his representative and file with him four (4) corrected copies.
Operating, Maintenance and Installation Manuals
1.
Prepare and furnish to the Owner operating and maintenance instruction manual as
follows:
a.
Prepare electronic manuals containing complete written instructions on operation,
care and maintenance of each component of equipment. Include requirements for
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b.
c.
frequency of inspection, cleaning, oiling, greasing, and adjusting and other
attention as may be required in accordance with manufacturer’s instructions.
Manuals shall include manufacturer’s brochures, catalog cuts, parts lists, wiring
diagrams, and similar pertinent data. Manuals shall also include a complete set of
approved shop drawings bound together with operating and maintenance
instructions for the respective piece of equipment.
Contents and format of manuals are subject to Owner’s approval for compliance
with this Article.
Operating and maintenance instructions shall include, but not be limited to, the
following:
1)
2)
3)
4)
5)
6)
7)
1.6
Entech #2321.02
Maintenance manuals.
Spare parts and materials.
Tools.
Lubricants.
Hazards.
Cleaning.
Warranties.
QUALITY ASSURANCE
A.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70,
by a qualified testing agency, and marked for intended location and application.
B.
NFPA Compliance:
components.
C.
ARI Certification: Air-handling units and their components shall be factory tested according to
ARI 430, "Central-Station Air-Handling Units," and shall be listed and labeled by ARI.
D.
ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and
Equipment" and Section 7 - "Construction and Startup."
E.
ASHRAE/IESNA 90.1 Compliance: Applicable requirements in ASHRAE/IESNA 90.1,
Section 6 - "Heating, Ventilating, and Air-Conditioning."
F.
Comply with NFPA 70.
1.7
Comply with NFPA 90A for installation of air-handling units and
MANUFACTURER’S FIELD SERVICES
A.
Modular indoor central-station air-handling unit manufacturer shall include in his costs the
services of a manufacturer’s representative for a minimum of two (2) eight hour days per unit to
check installation following completion by the Contractor, and to witness start-up of equipment.
Manufacturer’s representative shall remain on the job continuously during working hours until
start-up is complete and provide written report to Owner at no additional cost.
B.
Inspect air-handling units after installation and submit report prior to start-up, verifying
installation is in accordance with specifications and manufacturer’s recommendations.
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C.
After successful start-up, furnish on-site instruction and training as follows:
1.
D.
1.8
Furnish qualified personnel to instruct and train the Owner’s personnel in proper
maintenance and operation of equipment. Include a minimum of 3 hours of training.
As part of instruction and training for operating equipment, demonstrate the following
procedures:
1.
2.
3.
4.
5.
6.
7.
E.
Entech #2321.02
Start-up.
Shutdown.
Emergency Operations.
Noise and vibration adjustments.
Safety procedures.
Economy and efficiency adjustments.
Effective energy utilization.
The Owner will not be responsible for maintenance until his appointed representatives have
been fully instructed and instruction event recorded by the Owner or his representative. Normal
maintenance works such as oiling and cleaning shall be performed by the Owner for remainder
of guarantee/warranty period.
WARRANTY
A.
Manufacturer shall furnish in writing the following:
1.
2.
1.9
Guarantee equipment performance published in manufacturer’s cataloged application and
specification data.
Unconditionally guarantee equipment, materials and workmanship for a period of one (1)
year on entire machine from the date of substantial completion of the project. During
guarantee period, manufacturer shall provide labor and materials necessary to repair or
replace, at his own expense and without additional cost to the Owner, materials,
equipment or workmanship in which defects may develop.
COORDINATION
A.
The University’s designated contractor(s) will be responsible to coordinate all Suppliers and
Trades involved in this project.
The pre-purchase equipment supplier shall coordinate delivery of the air handling units with the
University’s designated contractor(s) as well as all manufacturer’s field services.
1.10
A.
SCHEDULE
The pre-purchase equipment supplier shall state in their bid the number of weeks required to
deliver equipment after receipt of approved submittals.
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1.11
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UNIT CONSTRUCTION
A.
Fabricate unit with heavy gauge channel posts and panels secured with mechanical fasteners.
All panels, access doors, and ship sections shall be sealed with permanently applied bulb-type
gasket. Shipped loose gasketing is not allowed.
B.
Panels and access doors shall be constructed as a 2-inch nominal thick; thermal broke double
wall assembly, injected with foam insulation with an R-value of not less than R-13.
1.
2.
3.
4.
The inner liner shall be constructed of G90 galvanized steel.
The outer panel shall be constructed of G90 galvanized steel.
The floor plate shall be constructed as specified for the inner liner.
Provide all access doors with windows.
C.
Panel deflection shall not exceed L/240 ratio at 125% of design static pressure, maximum 5
inches of positive or 6 inches of negative static pressure. Deflection shall be measured at the
panel midpoint.
D.
The casing leakage rate shall not exceed .5 cfm per square foot of cabinet area at 5 inches of
positive static pressure or 6 inches of negative static pressure.
E.
Module to module field assembly shall be accomplished with an overlapping, full perimeter
internal splice joint that is sealed with bulb type gasketing on both mating modules to minimize
on-site labor and meet indoor air quality standards.
F.
Access doors shall be flush mounted to cabinetry, with minimum of two six inch long stainless
steel piano-type hinges, latch and full size handle assembly. Access doors shall swing outward
for unit sections under negative pressure. Access doors on positive pressure sections, shall
swing inward against pressure and shall have a secondary latch to relieve pressure and prevent
injury upon access. Access door latches shall have the ability of being locked in the field.
G.
A 6-inch formed G60 galvanized steel base rail shall be provided by the unit manufacturer for
structural rigidity and condensate trapping. The base rail shall be constructed with 12-gauge
nominal for smaller unit sizes and 10-gauge nominal for larger unit sizes. The following
calculation shall determine the required height of the base rail to allow for adequate drainage.
Use the largest pressure to determine base rail height. [(Negative)(Positive) static pressure (in)]
(2) + 4” = required base rail height. Should the unit base rail not be factory supplied at this
height, the contractor is required to supply a concrete housekeeping pad to make up the
difference.
H.
Construct drain pans from stainless steel with cross break and double sloping pitch to drain
connection. Provide drain pans under cooling coil section. Drain connection centerline shall be
a minimum of 3’’ above the base rail to aid in proper condensate trapping. Drain connections
that protrude from the base rail are not acceptable. There must be a full 2’’ thickness of
insulation under drain pan.
I.
Provide each unit sections with LED or light fixtures (equivalent to 100 W.) with switches
located on the exterior of the unit, adjacent to the access door for each section.
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ROBINSON HALL – AHU-2 AND WILSON HALL – AHU-2 AND AHU-3
1.12
Entech #2321.02
FAN ASSEMBLIES
A.
Acceptable fan assembly shall be a double width, double inlet, class II, belt-drive type housed
airfoil fan dynamically balanced as an assembly, as shown in schedule. Maximum fan RPM
shall be below first critical fan speed. Fan assemblies shall be dynamically balanced by the
manufacturer on all three planes and at all bearing supports. Copper lubrication lines shall be
provided and extend from the bearings and attached with grease fittings to the fan base
assembly near access door. Fan and motor shall be mounted internally on a steel base. Factory
mount the motor on slide base that can be slid out the side of unit if removal is required.
Provide access to motor, drive, and bearings through hinged access door.
B.
Acceptable fan assembly shall be a single width, single inlet, class II, direct-drive type plenum
fan dynamically balanced as an assembly, as shown in schedule. Maximum fan RPM shall be
below first critical fan speed. Fan assemblies shall be dynamically balanced by the manufacturer
on all three planes. Provide access to motor and fan assembly through hinged access door.
C.
Acceptable fan assembly shall be a single width, single inlet, class II, belt-drive type, plenum
fan dynamically balanced as an assembly, as shown in schedule. Maximum fan RPM shall be
below first critical fan speed. Fan assemblies shall be dynamically balanced by the
manufacturer on all three planes and at all bearing supports. Copper lubrication lines shall be
provided and extend from the bearings and attached with grease fittings to the fan base
assembly near access door. Fan and motor shall be mounted internally on a steel base. Factory
mount the motor on slide base that can be slid out the side of unit if removal is required.
Provide access to motor, drive, and bearings through hinged access door.
D.
Acceptable fan assembly shall be a double width, double inlet, class II, belt-drive type housed
airfoil fan dynamically balanced as an assembly, as shown in schedule. Maximum fan RPM
shall be below first critical fan speed. Fan assemblies shall be dynamically balanced by the
manufacturer on all three planes and at all bearing supports. Copper lubrication lines shall be
provided and extend from the bearings and attached with grease fittings to the fan base
assembly near access door. Fan and motor shall be mounted internally on a steel base. Factory
mount the motor on slide base that can be slid out the side of unit if removal is required.
Provide access to motor, drive, and bearings through hinged access door.
E.
Fan and motor shall be mounted internally on a steel base. Factory mount the motor on slide
base that can be slid out the side of the unit if removal is required. Provide access to motor,
drive, and bearings through hinged access door. Fan and motor assembly shall be mounted on
2" deflection spring vibration type isolators inside cabinetry.
1.13
BEARINGS, SHAFTS, AND DRIVES
A.
Bearings: Basic load rating computed in accordance with AFBMA - ANSI Standards. The
bearings shall be provided on the motor with the fan wheel mounted directly on the motor shaft,
AMCA arrangement 4.
B.
Bearings: Basic load rating computed in accordance with AFBMA - ANSI Standards. The
bearings shall be designed for service with an L-50 life of 200,000 hours and shall be a heavy
duty pillow block, self-aligning, grease-lubricated ball or spherical roller bearing type.
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ROBINSON HALL – AHU-2 AND WILSON HALL – AHU-2 AND AHU-3
Entech #2321.02
C.
Shafts shall be solid, hot rolled steel, ground and polished, keyed to shaft, and protectively
coated with lubricating oil. Hollow shafts are not acceptable.
D.
The fan wheel shall be direct coupled to the motor shaft. The wheel width shall be determined
by motor speed and fan performance characteristics.
E.
V-Belt drives shall be cast iron or steel sheaves, dynamically balanced, bored to fit shafts and
keyed. Fixed sheaves, matched belts, and drive rated based on motor horsepower. Minimum of
2 belts shall be provided on all fans with 10 HP motors and above. Standard drive service factor
minimum shall be 1.1 S.F. for 1/4 HP – 7.5 HP, 1.3 S.F. for 10 HP and larger, calculated based
on fan brake horsepower.
1.14
ELECTRICAL
A.
Fan motors shall be manufacturer provided and installed, Open Drip Proof, premium efficiency
(meets or exceeds EPAct requirements), 1160 RPM, single speed, 460V / 60HZ / 3PH.
Complete electrical characteristics for each fan motor shall be as shown in schedule.
B.
Wiring Termination: Provide terminal lugs to match branch circuit conductor quantities, sizes,
and materials indicated. Enclosed terminal lugs in terminal box sized to NFPA 70.
C.
Manufacturer shall provide ASHRAE 90.1 Energy Efficiency equation details for individual
equipment to assist Building Engineer for calculating system compliance.
D.
Air handler manufacturer shall provide variable speed drive mount and wire ABB variable
speed drive with electrical characteristics such as indicated on project schedule and shown on
manufacturer's data sheets.
E.
All electrical connection components shall be field provided and mounted as shown on project
schedule.
1.15
COOLING AND HEATING COILS
A.
Certification: Acceptable water cooling, water heating, steam, and refrigerant coils shall be
certified in accordance with AHRI Standard 410 and bear the AHRI label. Coils exceeding the
scope of the manufacturer’s certification and/or the range of AHRI’s standard rating conditions
will be considered provided the manufacturer is a current member of the AHRI Forced
Circulation Air-Cooling and Air-Heating Coils certification programs and that the coils have
been rated in accordance with AHRI Standard 410. Manufacturer must be ISO 9002 certified.
B.
Water cooling coil shall be provided with two headers. Provide access to coil(s) for service and
cleaning. Enclose coil headers and return bends fully within unit casing. Unit shall be provided
with coil connections that extend a minimum of 5” beyond unit casing for ease of installation.
Drain and vent connections shall be provided exterior to unit casing. Coil connections must be
factory sealed with grommets on interior and exterior panel liners to minimize air leakage and
condensation inside panel assembly. Coils shall be removable through side and/or top panels of
unit without the need to remove and disassemble the entire section from the unit.
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1.
2.
3.
4.
5.
1.16
Entech #2321.02
Headers shall consist of seamless copper tubing to assure compatibility with primary
surface. Headers shall be constructed for 250 psig operating pressure. Headers to have
intruded tube holes to provide maximum brazing surface for tube to header joint,
strength, and inherent flexibility. Header diameter should vary with fluid flow
requirements.
Fins shall have a minimum thickness of 0.0075 inch aluminum plate construction. Fins
shall have full drawn collars to provide a continuous surface cover over the entire tube
for maximum heat transfer. Tubes shall be mechanically expanded into the fins to
provide a continuous primary to secondary compression bond over the entire finned
length for maximum heat transfer rates. Bare copper tubes shall not be visible between
fins.
Coil tubes shall be 5/8 inch OD seamless copper, 0.035 inch nominal tube wall thickness,
expanded into fins, brazed at joints. Soldered U-bends shall be provided to minimize the
effects of erosion and premature failure having a minimum tube wall thickness of .035
inches.
Coil connections shall be red brass with male pipe threaded connection silver soldered to
the headers. Connection size to be determined by manufacturer based upon the most
efficient coil circuiting. Vent (1/4” FPT) and drain (1/4” FP) fittings shall be furnished
on the connections, exterior to the air handler. Vent connections provided at the highest
point to assure proper venting. Drain connections shall be provided at the lowest point to
insure complete drainage and prevent freeze-up.
Coil casing shall be a formed channel frame of galvanized steel.
FILTERS
A.
Furnish combination filter section with 2-inch flat pre-filter (with one spare set) and 12-inch
Bag cartridge 85% efficient (MERV 14) final filter. Provide side loading and removal of filters.
B.
Filter media shall be UL 900 listed, Class I or Class II.
C.
Filter magnehelic gauge(s) shall be furnished and mounted by manufacturer.
1.17
ADDITIONAL SECTIONS
A.
Plenum section shall be provided and properly sized for inlet and/or discharge air flow (between
600 and 1500 feet per minute). The plenum shall provide single or multiple openings as shown
on drawings and project schedule.
B.
Access section shall be provided for access between components.
C.
Economizer Section: Minimum outside air and economizer dampers shall be TAMCOs as
described below. Frames shall be 4" (101.6mm) deep x 1" (25.4 mm) and no less than .080"
(2.03mm) in thickness, mill finish extruded aluminum (6063-T5) with mounting flanges on both
sides of frame. Frame to be assembled using plated steel mounting fasteners. Blades shall be
extruded aluminum (6063-TS), mill finish air-foil profiles, internally insulated with expanded
polyurethane foam and shall be thermally broken. Complete blade shall have an insulating
factor of R-2.29 and a temperature index of 55. Blade seals shall be of extruded EPDM. Frame
seals shall be of extruded silicone. Seals are to be secured in an integral slot within the
aluminum extrusions. Blade and frame seals are to be mechanically fastened to eliminate
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ROBINSON HALL – AHU-2 AND WILSON HALL – AHU-2 AND AHU-3
Entech #2321.02
shrinkage and movement over the life of the damper. Adhesive or clip-on type blade seals shall
not be approved. Maintenance-free bearings are to be composed of a Celcon inner bearing fixed
to a 71"" (11.11mm) aluminum hexagon blade pivot pin, rotating within a polycarbonate outer
bearing inserted into the frame. There shall be no metal-to-metal or metal-to-plastic contact.
Adjustable 7/16" (11.11mm) hexagonal drive rod, U-bolt fastener and retaining nuts shall be
hexagonal, corrosion-resistant, zinc-plated steel to provide positive connection to blades and
linkage. Linkage hardware shall be installed in the frame side. All linkage crank arm and rod
hardware parts shall be constructed of mill finished aluminum, complete with corrosion
resistant, zinc-plated trunnions and cup-point trunnion screws for a slip- proof grip. Dampers
are to be designed for operation in temperatures ranging between -40"F (-40"C) and 212"F
(100"C). Dampers shall be rated Leakage Class 1A at 1 in. w.g. (0.25 kPa) static pressure
differential. Standard air leakage data shall be certified under the AMCA Certified Ratings
Program. Dampers shall be made to size required without blanking off free area. Dampers
shall be available with either opposed blade action or parallel blade action. Dampers shall be
available in two mounting types: i.e., "Installed in Duct" or "Flanged to Duct". Installation of
dampers must be in accordance with TAMCO's current installation guidelines, provided with
each damper shipment. Intermediate or tubular steel structural support is required to resist
applied pressure loads for dampers that consist of two or more sections in both height and
width. (See TAMCO Aluminum Damper Installation Guidelines.) Acceptable product shall be
TAMCO Series 9000 Thermally Insulated Damper, as manufactured by T. A. Morrison & Co.,
Inc. Return and relief dampers shall be manufacturer’s standard opposed blade, single thickness
dampers.
D.
Controls: Controls contractor shall supply air handling unit controls to manufacturer for factory
mounting. All required casing penetrations for electrical, controls or other devices shall be
factory coordinated and installed.
E.
Variable Frequency Drives: Refer to Section 262923 attached.
1.18
SOURCE QUALITY CONTROL
A.
Fan Sound-Power Level Ratings: Comply with AMCA 301, "Methods for Calculating Fan
Sound Ratings from Laboratory Test Data." Test fans according to AMCA 300, "Reverberant
Room Method for Sound Testing of Fans." Fans shall bear AMCA-certified sound ratings seal.
B.
Fan Performance Rating: Factory test fan performance for airflow, pressure, power, air density,
rotation speed, and efficiency.
C.
Water Coils: Factory tested to 300 psig according to ARI 410 and ASHRAE 33.
1.19
A.
CAPACITIES
As indicated on attached data sheets.
PART 2 - EXECUTION – NOT USED
END OF SECTION 237313-1
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Entech #2321.02
SECTION 262923 - VARIABLE-FREQUENCY MOTOR CONTROLLERS
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
1.3
Section includes separately enclosed, preassembled, combination VFCs, rated 600 V and less,
for speed control of three-phase, squirrel-cage induction motors.
ACTION SUBMITTALS
A.
Product Data: For each type and rating of VFC indicated.
1.
2.
B.
Shop Drawings: For each VFC indicated.
1.
2.
3.
1.4
Include dimensions and finishes for VFCs.
Include rated capacities, operating characteristics, electrical characteristics, and furnished
specialties and accessories.
Include mounting and attachment details.
Include details of equipment assemblies. Indicate dimensions, weights, loads, required
clearances, method of field assembly, components, and location and size of each field
connection.
Include diagrams for power, signal, and control wiring.
INFORMATIONAL SUBMITTALS
A.
Coordination Drawings: Floor plans, drawn to scale, showing dimensioned layout on which the
following items are shown and coordinated with each other, using input from installers of the
items involved:
1.
2.
3.
4.
Required working clearances and required area above and around VFCs.
Show VFC layout and relationships between electrical components and adjacent
structural and mechanical elements.
Show support locations, type of support, and weight on each support.
Indicate field measurements.
B.
Qualification Data: For testing agency.
C.
Product Certificates: For each VFC from manufacturer.
VARIABLE-FREQUENCY MOTOR CONTROLLERS
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Entech #2321.02
D.
Harmonic Analysis Report: Provide Project-specific calculations and manufacturer's statement
of compliance with IEEE 519.
E.
Source quality-control reports.
F.
Field quality-control reports.
G.
Sample Warranty: For special warranty.
1.5
CLOSEOUT SUBMITTALS
A.
Operation and Maintenance Data: For VFCs to include in emergency, operation, and
maintenance manuals.
1.
In addition to items specified in Section 017823 "Operation and Maintenance Data,"
include the following:
a.
b.
c.
d.
e.
f.
1.6
Manufacturer's written instructions for testing and adjusting thermal-magnetic
circuit breaker and motor-circuit protector trip settings.
Manufacturer's written instructions for setting field-adjustable overload relays.
Manufacturer's written instructions for testing, adjusting, and reprogramming
microprocessor control modules.
Manufacturer's written instructions for setting field-adjustable timers, controls, and
status and alarm points.
Load-Current and Overload-Relay Heater List: Compile after motors have been
installed, and arrange to demonstrate that selection of heaters suits actual motor
nameplate, full-load currents.
Load-Current and List of Settings of Adjustable Overload Relays: Compile after
motors have been installed, and arrange to demonstrate that switch settings for
motor-running overload protection suit actual motors to be protected.
MAINTENANCE MATERIAL SUBMITTALS
A.
Furnish extra materials that match products installed and that are packaged with protective
covering for storage and identified with labels describing contents.
1.
2.
3.
4.
5.
Power Fuses: Equal to 10 percent of quantity installed for each size and type, but no
fewer than three of each size and type.
Control Power Fuses: Equal to 10 percent of quantity installed for each size and type, but
no fewer than two of each size and type.
Indicating Lights: Two of each type and color installed.
Auxiliary Contacts: Furnish one spare(s) for each size and type of magnetic controller
installed.
Power Contacts: Furnish three spares for each size and type of magnetic contactor
installed.
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1.7
Entech #2321.02
QUALITY ASSURANCE
A.
Testing Agency Qualifications: Member Company of NETA or an NRTL.
1.
1.8
Testing Agency's Field Supervisor: Currently certified by NETA to supervise on-site
testing.
DELIVERY, STORAGE, AND HANDLING
A.
1.9
If stored in space that is not permanently enclosed and air conditioned, remove loose packing
and flammable materials from inside controllers and install temporary electric heating, with at
least 250 W per controller.
WARRANTY
A.
Special Warranty: Manufacturer agrees to repair or replace VFCs that fail in materials or
workmanship within specified warranty period.
1.
Warranty Period: Five years from date of Substantial Completion.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
1.
2.2
ABB.
SYSTEM DESCRIPTION
A.
General Requirements for VFCs:
1.
2.
VFCs and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing
agency, and marked for intended location and application.
Comply with NEMA ICS 7, NEMA ICS 61800-2, and UL 508A, UL 508C.
B.
Application: Constant torque.
C.
VFC Description: Variable-frequency motor controller, consisting of power converter that
employs pulse-width-modulated inverter, factory built and tested in an enclosure, with integral
disconnecting means and overcurrent and overload protection; listed and labeled by an NRTL as
a complete unit; arranged to provide self-protection, protection, and variable-speed control of
one or more three-phase induction motors by adjusting output voltage and frequency.
1.
Units suitable for operation of NEMA MG 1, Design A and Design B motors, as defined
by NEMA MG 1, Section IV, Part 30, "Application Considerations for Constant Speed
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2.
3.
Entech #2321.02
Motors Used on a Sinusoidal Bus with Harmonic Content and General Purpose Motors
Used with Adjustable-Voltage or Adjustable-Frequency Controls or Both."
Units suitable for operation of inverter-duty motors as defined by NEMA MG 1,
Section IV, Part 31, "Definite-Purpose Inverter-Fed Polyphase Motors."
Listed and labeled for integrated short-circuit current (withstand) rating by an NRTL
acceptable to authorities having jurisdiction.
D.
Design and Rating: Match load type, such as fans, blowers, and pumps; and type of connection
used between motor and load such as direct or through a power-transmission connection.
E.
Output Rating: Three phase; 10 to 60 Hz, with voltage proportional to frequency throughout
voltage range maximum voltage equals input voltage.
F.
Unit Operating Requirements:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Input AC Voltage Tolerance: Plus 10 and minus 15 percent of VFC input voltage rating.
Input AC Voltage Unbalance: Not exceeding 3 percent.
Input Frequency Tolerance: Plus or minus 3 percent of VFC frequency rating.
Minimum Efficiency: 97 percent at 60 Hz, full load.
Minimum Displacement Primary-Side Power Factor: 98 percent under any load or speed
condition.
Minimum Short-Circuit Current (Withstand) Rating: 22kA.
Ambient Temperature Rating: Not less than 32 deg F and not exceeding 104 deg F.
Humidity Rating: Less than 95 percent (noncondensing).
Altitude Rating: Not exceeding 3300 feet.
Vibration Withstand: Comply with NEMA ICS 61800-2.
Overload Capability: 1.5 times the base load current for 60 seconds; minimum of 1.8
times the base load current for three seconds.
Starting Torque: Minimum 100 percent of rated torque from 3 to 60 Hz.
Speed Regulation: Plus or minus 10 percent.
Output Carrier Frequency: Selectable; 0.5 to 15 kHz.
Stop Modes: Programmable; includes fast, free-wheel, and dc injection braking.
G.
Inverter Logic: Microprocessor based, 32 bit, isolated from all power circuits.
H.
Isolated Control Interface: Allows VFCs to follow remote-control signal over a minimum 40:1
speed range.
1.
I.
Internal Adjustability Capabilities:
1.
2.
3.
4.
5.
J.
Signal: Electrical.
Minimum Speed: 5 to 25 percent of maximum rpm.
Maximum Speed: 80 to 100 percent of maximum rpm.
Acceleration: 0.1 to 999.9 seconds.
Deceleration: 0.1 to 999.9 seconds.
Current Limit: 30 to minimum of 150 percent of maximum rating.
Self-Protection and Reliability Features:
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1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Entech #2321.02
Surge Suppression: Factory installed as an integral part of the VFC, complying with
UL 1449 SPD, Type 1 or Type 2.
Surge Suppression: Field-mounted surge suppressors complying with UL 1449 SPD,
Type 2.
Loss of Input Signal Protection: Selectable response strategy, including speed default to a
percent of the most recent speed, a preset speed, or stop; with alarm.
Under- and overvoltage trips.
Inverter overcurrent trips.
VFC and Motor-Overload/Overtemperature Protection: Microprocessor-based thermal
protection system for monitoring VFCs and motor thermal characteristics, and for
providing VFC overtemperature and motor-overload alarm and trip; settings selectable
via the keypad.
Critical frequency rejection, with three selectable, adjustable deadbands.
Instantaneous line-to-line and line-to-ground overcurrent trips.
Loss-of-phase protection.
Reverse-phase protection.
Short-circuit protection.
Motor-overtemperature fault.
K.
Automatic Reset/Restart: Attempt three restarts after drive fault or on return of power after an
interruption and before shutting down for manual reset or fault correction; adjustable delay time
between restart attempts.
L.
Power-Interruption Protection: To prevent motor from re-energizing after a power interruption
until motor has stopped, unless "Bidirectional Autospeed Search" feature is available and
engaged.
M.
Bidirectional Autospeed Search: Capable of starting VFC into rotating loads spinning in either
direction and returning motor to set speed in proper direction, without causing damage to drive,
motor, or load.
N.
Torque Boost: Automatically varies starting and continuous torque to at least 1.5 times the
minimum torque to ensure high-starting torque and increased torque at slow speeds.
O.
Motor Temperature Compensation at Slow Speeds: Adjustable current fall-back based on output
frequency for temperature protection of self-cooled, fan-ventilated motors at slow speeds.
P.
Integral Input Disconnecting Means and OCPD: UL 489, instantaneous-trip circuit breaker with
pad-lockable, door-mounted handle mechanism.
1.
2.
2.3
Disconnect Rating: Not less than 115 percent of NFPA 70 motor full-load current rating
or VFC input current rating, whichever is larger.
Auxiliary Contacts: NO or NC, arranged to activate before switch blades open.
CONTROLS AND INDICATION
A.
Status Lights: Door-mounted LED indicators displaying the following conditions:
1.
2.
Power on.
Run.
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3.
4.
5.
6.
B.
Overvoltage.
Line fault.
Overcurrent.
External fault.
Panel-Mounted Operator Station: Manufacturer's standard front-accessible, sealed keypad and
plain-English-language digital display; allows complete programming, program copying,
operating, monitoring, and diagnostic capability.
1.
2.
Keypad: In addition to required programming and control keys, include keys for HAND,
OFF, and AUTO modes.
Security Access: Provide electronic security access to controls through identification and
password with at least three levels of access: View only; view and operate; and view,
operate, and service.
a.
C.
Real-time clock with current time and date.
Running log of total power versus time.
Total run time.
Fault log, maintaining last four faults with time and date stamp for each.
Indicating Devices: Digital display mounted flush in VFC door and connected to display VFC
parameters including, but not limited to:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
E.
Control Authority: Supports at least four conditions: Off, local manual control at
VFC, local automatic control at VFC, and automatic control through a remote
source.
Historical Logging Information and Displays:
1.
2.
3.
4.
D.
Entech #2321.02
Output frequency (Hz).
Motor speed (rpm).
Motor status (running, stop, fault).
Motor current (amperes).
Motor torque (percent).
Fault or alarming status (code).
PID feedback signal (percent).
DC-link voltage (V dc).
Set point frequency (Hz).
Motor output voltage (V ac).
Control Signal Interfaces:
1.
Electric Input Signal Interface:
a.
b.
2.
3.
A minimum of two programmable analog inputs: 4- to 20-mA dc.
A minimum of six multifunction programmable digital inputs.
Pneumatic Input Signal Interface: 3 to 15 psig.
Remote Signal Inputs: Capability to accept any of the following speed-setting input
signals from the DDC system for HVAC or other control systems:
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a.
b.
c.
d.
4.
Number of Loops: Two.
Interface with DDC System for HVAC: Factory-installed hardware and software shall interface
with DDC system for HVAC to monitor, control, display, and record data for use in processing
reports. VFC settings shall be retained within VFC's nonvolatile memory.
1.
Hardwired Points:
a.
b.
2.
2.4
Motor running.
Set point speed reached.
Fault and warning indication (overtemperature or overcurrent).
PID high- or low-speed limits reached.
PID Control Interface: Provides closed-loop set point, differential feedback control in response
to dual feedback signals. Allows for closed-loop control of fans and pumps for pressure, flow,
or temperature regulation.
1.
G.
Output frequency (Hz).
Output current (load).
DC-link voltage (V dc).
Motor torque (percent).
Motor speed (rpm).
Set point frequency (Hz).
Remote Indication Interface: A minimum of two programmable dry-circuit relay outputs
(120-V ac, 1 A) for remote indication of the following:
a.
b.
c.
d.
F.
0- to 10-V dc.
4- to 20-mA dc.
Potentiometer using up/down digital inputs.
Fixed frequencies using digital inputs.
Output Signal Interface: A minimum of one programmable analog output signal(s) 4- to
20-mA dc, which can be configured for any of the following:
a.
b.
c.
d.
e.
f.
5.
Entech #2321.02
Monitoring: On-off status.
Control: On-off operation.
Communication Interface: Comply with ASHRAE 135. Communication shall interface
with DDC system for HVAC to remotely control and monitor lighting from a DDC
system for HVAC operator workstation. Control features and monitoring points displayed
locally at lighting panel shall be available through the DDC system for HVAC.
LINE CONDITIONING AND FILTERING
A.
Input Line Conditioning: Based on the manufacturer's harmonic analysis study and report,
provide input filtering, as required, to limit total demand (harmonic current) distortion and total
harmonic voltage demand at the defined point of common coupling to meet IEEE 519
recommendations.
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2.5
Entech #2321.02
OPTIONAL FEATURES
A.
Damper control circuit with end-of-travel feedback capability.
B.
Sleep Function: Senses a minimal deviation of a feedback signal and stops the motor. On an
increase in speed-command signal deviation, VFC resumes normal operation.
C.
Motor Preheat Function: Preheats motor when idle to prevent moisture accumulation in the
motor.
D.
Communication Port: RS-232 port, USB 2.0 port, or equivalent connection capable of
connecting a printer and a notebook computer.
2.6
ENCLOSURES
A.
2.7
VFC Enclosures: NEMA 4, to comply with environmental conditions at installed location.
ACCESSORIES
A.
General Requirements for Control-Circuit and Pilot Devices: NEMA ICS 5; factory installed in
VFC enclosure cover unless otherwise indicated.
1.
2.
3.
4.
B.
2.8
Push Buttons: Covered.
Pilot Lights: Push to test.
Selector Switches: Rotary type.
Stop and Lockout Push-Button Station: Momentary-break, push-button station with a
factory-applied hasp arranged so padlock can be used to lock push button in depressed
position with control circuit open.
Control Relays: Auxiliary and adjustable solid-state time-delay relays.
SOURCE QUALITY CONTROL
A.
Testing: Test and inspect VFCs according to requirements in NEMA ICS 61800-2.
1.
2.
Test each VFC while connected to its specified motor.
Verification of Performance: Rate VFCs according to operation of functions and features
specified.
B.
VFCs will be considered defective if they do not pass tests and inspections.
C.
Prepare test and inspection reports.
PART 3 - EXECUTION – NOT USED
END OF SECTION 262923
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