Philippine Deposit Insurance Corporation
SCOPE OF WORKS &
TECHNICAL SPECIFICATIONS
MECHANICAL
RENOVATION OF PDIC BUILDING
IN CHINO ROCES (PHASE 3)
2228 Chino Roces Avenue, Makati City
RAMON D. AGUILOS
PROFESSIONAL MECHANICAL ENGINEER
V E. H. SISON ENGINEERS, CO.
ENGINEERS * PLANNERS * CONSULTANTS
3431 Guernica St., Palanan, Makati City, M.M. Tel Nos. (02)8317115/8337030 email ehsison@ehsec.com/info@ehsec.com
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 07841
THROUGH PENETRATION FIRESTOPPING SYSTEMS
PART 1 – GENERAL
1.1
DESCRIPTION
A. Closures of openings in walls, floors, and roof decks against penetration of flame,
heat, and smoke or gases in fire resistant rated construction.
B. Closure of openings in walls against penetration of gases or smoke in smoke partitions.
1.2
SUBMITTALS
A. All submittals shall be certified and approved by the manufacturer’s representative
prior to submission to the Consultant.
B. Manufacturer’s literature, data, and installation instructions for types of firestopping and
smoke stopping used.
C. List of FM, UL, or WH classification number of systems installed.
D. Certified laboratory test reports for ASTM E 814 tests for systems not listed by FM, UL,
or WH proposed for use.
1.3
DELIVERY AND STORAGE
A. Deliver materials in their original unopened containers with manufacturer’s name and
product identification.
B. Store in a location providing protection from damage and exposure to the elements.
1.4
GUARANTEE
Firestopping work subject to the terms of the Article GUARANTY except extend the
guaranty period to five years.
1.5
QUALITY ASSURANCE
FM. UL, or WH or other approved laboratory tested products will be acceptable.
1.6
APPLICABLE PUBLICATIONS
The Publications listed below form a part of this specification to the extent referenced.
Publications are referenced in the text by the basic designation only.
A. American Society for Testing and Materials (ASTM):
ASTM E84
-
Surface Burning Characteristics of Building Materials
ASTM E814
-
Fire Tests of Through-Penetration Fire Stops
B. Factory Mutual Engineering and Research Corporation (FM): Annual Issue Approval Guide
Building Materials
C. Underwriters Laboratories, Inc. (UL):
SECTION 07841 - THROUGH PENETRATION FIRESTOPPING SYSTEMS
ME-001-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
UL 1479
-
Fire Tests of Through-Penetration Fire Stops
Annual Issue Building Materials Directory
Annual Issue Fire Resistance Directory
D. Warnock Hersey (WH):
Annual Issue Certification Listings
PART 2 – PRODUCTS
2.1
FIRESTOP SYSTEMS
A. Use either factory built (Firestop Devices) or field erected through-Penetration (Firestop
Systems) to form a specific building system maintaining required integrity of the fire
barrier and stop the passage of gases of smoke.
B. Through-Penetration firestop systems and firestop devices tested in accordance with
ASTM E814 or UL 1479 using the “F” or “T” rating to maintain the same rating and
integrity as the fire barrier being sealed. “T” ratings are not required for penetrations
smaller than or equal to 100 mm (4 in) nominal pipe or 0.01 m² (16 sq.in) in overall
cross sectional area.
C. Products requiring heat activation to seal an opening by its intumescences shall exhibit
a demonstrated ability to function as designed to maintain the fire barrier.
D. Firestop sealants used for firestopping or smoke sealing shall have following properties:
1. Contain no flammable or toxic solvents.
2. Have no dangerous or flammable outgassing during the drying or curing of
products.
3. Water-resistant after drying or curing and unaffected by high humidity,
condensation or transient water exposure.
4. When used in exposed areas, shall be capable of being sanded and finished with
similar surface treatments as used on the surrounding wall or floor surface.
E. Firestopping system or devices used for penetrations by glass pipe, plastic pipe or
conduits, unenclosed cables, or other non-metallic materials shall have following
properties:
1. Classified for used with the particular type of penetrating material used.
2. Penetrations containing loose electrical cables, computer data cables and
communications cables protected using firestopping systems that allow unrestricted
cable changes without damage to the seal.
3. Intumescent products which would expand to seal the opening and act as fire,
smoke, toxic fumes, and, water sealant.
F. Maximum flame spread of 25 and smoke development of 50 when tested in
accordance with ASTM E84.
G. FM, UL, or WH rated or tested by an approved laboratory in accordance with ASTM E814.
H. Materials to be asbestos free.
SECTION 07841 - THROUGH PENETRATION FIRESTOPPING SYSTEMS
ME-001-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2.2
SMOKE STOPPING IN SMOKE PARTITIONS
A. Use silicone sealant in smoke partitions as specified in Section 3 Part 9, Adhesives,
Caulking, Sealants and Fasteners.
B. Use mineral fiber filler and bond breaker behind sealant.
C. Sealants shall have a maximum flame spread of 25 and smoke developed of 50 when
tested in accordance with E84.
D. When used in exposed areas capable of being sanded and finished with similar
surface treatments as used on the surrounding wall or floor surface.
PART 3 – EXECUTION
3.1
EXAMINATION
Submit product data and installation instructions, as required by article, submittals, after an
onsite examination of areas to receive firestopping.
3.2
PREPARATION
A. Remove dirt, grease, oil, loose materials, or other substances that prevent adherence
and bonding or application of the firestopping or smoke stopping materials.
B. Remove insulation on insulated pipe for a distance of 150 mm (six inches) on either side
of the fire rated assembly prior to applying the firestopping materials unless the
firestopping materials are tested and approved for use on insulated pipes.
3.3
INSTALLATION
A. Do not begin work until the specified material data and installation instructions of the
proposed firestopping systems have been submitted and approved.
B. Install firestopping systems with smoke stopping in accordance with FM, UL, WH, or other
approved system details and installation instructions.
C. Install smoke stopping seals in smoke partitions.
3.4
CLEAN-UP AND ACCEPTANCE OF WORK
A. As work on each floor is completed, remove materials, litter, and debris.
B. Do not move materials and equipment to the next-scheduled work area until
completed work is inspected and accepted by the Resident Engineer.
C. Clean up spills of liquid type materials.
D. Contractor’s Installation of all firestopping materials and products shall be closely
supervised by manufacturer’s representative.
SECTION 07841 - THROUGH PENETRATION FIRESTOPPING SYSTEMS
ME-001-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
E. Regular inspection shall be done by the manufacturer’s representative to ascertain
that the works are being done according to the design intent. A copy of the inspection
report with all its findings and recommendations including the corrective works
implemented shall be forwarded to the Consultant on regular basis.
END OF SECTION 07841
SECTION 07841 - THROUGH PENETRATION FIRESTOPPING SYSTEMS
ME-001-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15000
MECHANICAL GENERAL REQUIREMENTS
PART 1 - GENERAL
1.1
APPLICATION
This section applies to all sections of the specifications of the Air Conditioning and Ventilation
System for the Philippine Deposit Insurance Corporation (PDIC).
1.2
DESCRIPTION OF WORK
The work includes providing Air Conditioning and Ventilation System for the Philippine Deposit
Insurance Corporation (PDIC) building located at 2228 Chino Roces Avenue, Makati City. The
works includes the following:
a. Supply and installation of air conditioning and ventilation system. The air conditioning and
ventilation system include the air cooled condensing units, fan coil units, refrigerant
piping and accessories, fans, ductworks, registers, dampers, equipment, piping and duct
supports, concrete pad, vibration isolator, air conditioning control system, electrical wiring
and conduits and all required accessories necessary to have an operational air
conditioning and ventilation system.
b. Supply and installation of air conditioning ducts. The air conditioning duct system include
the supply, return and fresh air ducts, registers, diffusers, grilles, duct insulation,
supports, and flexible duct connection.
c.
Supply and installation of condensate drain piping system. The condensate drain piping
system includes pipes, fittings, p-traps, insulation, supports and all required accessories.
d. Painting of pipes, hangers, supports and equipment.
e. Grouting of all opening in floors and walls after all pipes and ducts are in place
and sealing of all such opening is not used.
f.
1.3
Testing, adjusting and commissioning of the system after complete installation.
PROJECT INFORMATION:
Contract Drawings: The work shall conform to the contract drawings, all of which form a part
of these specifications:
A. Omissions from the drawings or specifications or the unclear description of details of
work which are manifestly necessary to carry out the intent of the drawings and
specifications or which are customarily performed, shall not relieve the Contractor
from performing such omitted or unclear description of the work but shall be
performed as if fully and correctly set forth and described in the drawings and
specifications.
SECTION 15000 MECHANICAL GENERAL REQUIREMENTS
ME-002-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
B. Drawings do not attempt to show exact details of piping and ductwork. Provide
offsets as necessary to avoid local obstruction or interference with other trades.
1.4
QUALIFICATION OF INSTALLER:
In accordance with DILG Memorandum Circular No. 2004-65-A dated June 11, 2008 and
DPWH NBCDO Memorandum Circular No. 04, series of 2007 dated April 13, 2007 Contractor
shall have a Philippine Contractor’s Accreditation Board (PCAB) license as a Contractor or as a
specialty Contractor.
The Contractor shall submit with the Bid, Data for approval showing that the Contractor has
successfully installed Air Conditioning system and equipment of the same type and design as
specified. Indicate the type and design of each system and certify that each system has
performed satisfactorily in the manner intended for a period of not less than 18 months. The
data shall include the following:
a.
b.
c.
d.
e.
f.
1.5
Professional Mechanical Engineer in charge of the project
Contractor’s PCAB Rating
List of projects that has been completed
Company profile
Organizational Chart
Contractor’s financial statement
SUBMITTALS:
Each submittal is to be complete and in sufficient detail to allow ready determination of
compliance with contract requirements. Submit shop drawings, manufacturer’s data and
certificates for equipment, materials and finish, and pertinent details for each system as
specified in each individual section, and obtain approval from the Consultant before
procurement, fabrication, or delivery to the job site. Approval of submittal shall not relieve the
Contractor of the responsibility of inspecting such material or equipment for defects or nonconforming to the specifications. Partial submittals are not acceptable and will be returned
without review. Submittals shall include the manufacturer’s name, trade name, catalog model
or number, nameplate data, size, layout dimensions, capacity, project specification and
paragraph reference, applicable, industry, and technical society publication references, years
of satisfactory service, and other information necessary to establish contract compliance of
each item the Contractor proposes to provide. Photographs of existing installations and data
submitted in lieu of catalog data are not acceptable and will be returned without approval.
A. Shop Drawings: Drawings shall include floor plans, sectional views, wiring
diagrams, and installation details of equipment, and equipment spaces
identifying and indicating proposed location, layout and arrangement of items of
equipment, control panels, accessories, piping, and other items that must be
shown to assure a coordinated installation. Drawings shall indicate adequate
clearance for operation, maintenance, and replacements of operating equipment
devices. If equipment is disapproved, drawings shall be revised to show
acceptable equipment and be resubmitted.
SECTION 15000 MECHANICAL GENERAL REQUIREMENTS
ME-002-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
Manufacturer’s Data: Submittals for each manufactured item shall be
manufacturer’s descriptive literature of cataloged products, equipment drawings,
diagrams, performance and characteristic curves, and catalog cuts.
C. Manufacturer’s Installation Instructions: Where installation procedures or any part
thereof are required to in accordance with the recommendations of the
manufacturer of the material being installed, printed copies of these
recommendations shall be furnished prior to installation. Installation of the item
will not be allowed to proceed until the recommendations are received. Failure
to furnish these recommendations can be cause for rejection of the material.
1.6
A.
Samples: Fabricated or unfabricated physical examples of materials, equipment
or workmanship that illustrate functional and aesthetic characteristics of a
material or product and establish standards by which the work can be judged.
B.
Certificates: Statements printed on the manufacturer's letterhead and signed by
responsible officials of manufacturer of product, system or material attesting that
product, system or material meets specification requirements.
OPERATION AND MAINTENANCE MANUAL:
Furnish an operation and maintenance manual as required for each item of equipment as
specified in each individual each item of equipment as specified in each individual section.
Furnish 2 copies of the manual bound in hardback binders or an approved equivalent. Furnish
one complete manual to the Consultant for review and approval within 15 calendar days after
the equipment is approved, but at least 30 calendar days prior to field acceptance testing of
the equipment or system. Furnish the remaining manuals at least 30 calendar days before the
contract is completed. Inscribe the following identification on the cover: the words
OPERATION AND MAINTENANCE MANUAL, the name and location of the equipment or the
building, and the names of the Contractor, The manual shall include the names, addresses,
and telephone numbers of each subcontractor installing equipment, and of the local
representatives for each item of equipment. The manual shall have a table of contents and be
assembled to conform to the table of contents with the tab sheets placed before instructions
covering the subject. The instructions shall be legible and easily read, with large sheets of
drawings folded in. The manual shall include: wiring and control diagrams with data to
explain detailed operation and control of each item of equipment, a control sequence
describing start-up, operation and shutdown, description of the function of each principal item
of
equipment; the procedure for starting; the procedure for operating; shutdown
instructions; installation instructions; maintenance instructions; lubrication schedule including
type, grade, temperature range, and frequency; safety precautions, diagrams, and
illustrations; test procedures performance data and parts list. The parts list for equipment
shall indicate the sources of supply, recommended spare parts, and the service organization,
which is reasonably convenient to the project site. The manual shall have complete
information on the equipment, controls, accessories, and associated appurtenances provided.
1.7
POSTED OPERATING INSTRUCTIONS:
Furnish approved operating instructions for each system and principal item of equipment as
specified in each individual section for the use of the operation and maintenance personnel.
The operating instructions shall include wiring diagrams, control diagrams, and control
SECTION 15000 MECHANICAL GENERAL REQUIREMENTS
ME-002-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
sequence for each principal item of equipment. Operating instructions shall be printed or
engraved, and shall be framed under glass or in approved laminated plastic and posted where
directed. Operating instructions shall be attached to or posted adjacent to each principal item
of equipment and include directions for start-up, proper adjustment, operating lubrication,
shutdown, safety precautions, procedure in the event of equipment failure, and other areas
as recommended by the manufacturer of each item of equipment.
1.8
DELIVERY STORAGE:
Equipment and materials shall be handled, stored, and protected to prevent damage before
and during installation in accordance with the manufacturer’s recommendations. Damaged or
defective items shall be replaced.
1.9
STANDARD PRODUCTS/SERVICE AVAILABILITY:
A. Materials and equipment shall be standard products of a manufacturer regularly engaged
in the manufacture of such products, which are of similar material, design and
workmanship. The standard products shall have been in satisfactory commercial or
industrial use for two years prior to bid opening.
B. Service Support: The equipment items shall be supported by service organizations. The
Contractor shall submit a certified list of qualified permanent service organizations for
support of the equipment, which includes their addresses and qualifications. These
service organizations shall be reasonably convenient to the equipment installation and
able to render satisfactory service to the equipment on a regular and emergency basis
during the warranty period of the contract.
C. Manufacturer’s Nameplate: Each item of equipment shall have a nameplate bearing the
manufacturer’s name, address, model number, and serial number securely affixed in a
conspicuous place, the nameplate of the distributing agent will not be acceptable.
1.10
SAFETY REQUIREMENTS:
Belts, pulley, chains, gears, couplings, projecting setscrews, keys, rotating parts, and other
power transmission apparatus, located so that any person can come in close proximity
thereto, shall be fully located or properly guarded. Points of operation, in going nip points,
and machinery producing flying chips and sparks shall be guarded.
1.11
RECORD AND AS-BUILT DRAWING:
Provide Record Drawings, which clearly show all deviation of installation from contract
drawings. Record drawings shall be maintained at the job site. Show all deviations in red ink.
After completion, but before final acceptance of the work, transfer the information from the
Record Drawings to As-Built Drawings. Furnish a complete set of As-Built Drawings of each
system for record purposes. The As-Built Drawings shall be reproducible and shall be of the
same size as the contract drawings.
SECTION 15000 MECHANICAL GENERAL REQUIREMENTS
ME-002-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
PART 2 - EXECUTION
2.1
INSTALLATION:
Equipment, materials installation and workmanship shall be in accordance with NFPA-90A,
“Standards for Installation of Air Conditioning and Ventilation System”. Also comply with
“Safety Code for Mechanical Refrigeration”. Ductwork shall comply with the Standards of the
Sheet Metal Air conditioning Contractors National Association (SMACNA).
2.2
WARRANTY:
Warrant the system, labor, materials and equipment supplied by the Contractor for a period
of one year after completion and acceptance of the system. Should any equipment or material
fail within this period, including loss of refrigerant, replace or repair that item at no cost to
the Owner.
2.3
CHANGE ORDERS
Should a change order to the work be necessary, the Contractor shall submit a formal change
order request for review of the Mechanical Engineering Consultant. The request shall include
reasons for the change orders with plans showing the changes necessary for the installation.
The Mechanical Engineering Consultant shall be review and approve all change orders before
any work commences. Any change order that is completed without the written approval of the
Consultant shall be at the Contractor’s expense.
Approval of shop drawings does not necessarily mean that associated change order can be
initiated by the Contractor. Contractor will have to call the attention of the Mechanical
Engineering Consultant for any changes that will require a change order.
2.4
GOVERNMENT PERMITS, INSPECTION:
The Contractor is responsible for obtaining the necessary government permits and shall pay
the corresponding fees.
2.5
ACCEPTANCE OF THE WORK:
The Mechanical Engineering Consultant will witness formal test and approved all system
before they are accepted.
END OF SECTION 15000
SECTION 15000 MECHANICAL GENERAL REQUIREMENTS
ME-002-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15050
BASIC MECHANICAL MATERIALS AND METHODS
PART 1 – GENERAL
1.1
WORK INCLUDED
A. Comply with Division 1, General Requirements and all documents referred to therein.
B. Provide all labour, materials, products, equipment and services to supply and install the
basic mechanical materials indicated on the Drawings and specified in Division 15 of
these Specifications.
1.2
RELATED WORK
A. Section 15010 – Mechanical General Provisions.
B. Section 07841 – Through Penetration Firestopping Systems.
C. Section 15071 – Mechanical Vibration and Seismic Controls.
D. Section 15080 – Mechanical Insulation.
E. Section 15900 – HVAC Instrumentation and Controls.
1.3
IDENTIFICATION OF MECHANICAL SERVICES
A. Identify all mechanical services after finish painting is complete.
B. Use terminology consistent - with the Drawings and Specifications
C. Identify lay-in type acoustic ceilings used for access to equipment and components by a
method acceptable to Consultant.
D. Mark valve and equipment identification on Record Drawings.
E.
1.4
Provide typewritten master lists for each Equipment Room. Frame under glass. Insert
copies in Operating and Maintenance Instruction Manuals.
PIPE AND DUCTWORK IDENTIFICATION
A. Provide SMS Wrap-Mark on all pipe coverings, using Wrap-Mark pipe markers with flow
arrow and alternating wording. For outside diameters up to 150 mm, allow marker to
completely wrap pipe. For larger outside diameters, secure markers with stainless steel
springs. Secure markers on vertical piping and elsewhere where markers could be
inadvertently moved.
B. Use stencils and stencil paint on ductwork or ductwork insulation. Apply solid black
capitalized lettering 50 mm high and solid black flow arrows 150 mm long x 50 mm wide.
C. Locate identification and flow arrows so they can be seen clearly from floor and service
platforms:
1. at least once in each room
2. at each piece of equipment
3. at each branch close to connection point to main piping and ductwork
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
4. at not greater than intervals of 15 metres on straight runs of exposed piping and
ductwork
5. at entry and leaving point to pipe and duct chases, or other concealed spaces
6. both sides where piping and ductwork passes through walls, partitions and floors
7. on vertical pipes and ducts approximately 1800 mm above floor
8. behind each access door and panel
9. at valves, identify piping upstream of valves and identify branch, equipment, building
part or building serviced downstream of valve
D. Colour code pipes meeting code International Standards and Owner’s requirements. At
minimum, colour code pipes with 50 mm wide bands in accordance with the detail shown
on the drawings. The Contractor is to submit the proposed colour coding of pipes for
approval.
1.5
VALVE TAGS (WHERE APPLICABLE)
A. Provide 40 mm dia., 1 mm thick brass tags with 10mm high die-stamped black letters.
B. Attach to valves with 100 mm long brass chains.
C. Tag all valves except for small valves isolating a single piece of equipment such as air
handling units, fan coil unit, primary air units and VRV/split ac units.
1.6
EQUIPMENT NAMEPLATES
A. Identify equipment, starters, and, remote control devices in a manner consistent with the
Drawings.
B. Use solid black capitalized lettering 100 mm high.
C. Where equipment size does not permit stencil identification, use lamacoid labels,
engraved white on black, mechanically fastened to the equipment. Minimum lettering
size 10 mm.
1.7
CONTROLS IDENTIFICATION
A. Meet Section 15900 requirements.
1.8
FLOW DIAGRAMS
A. Prepare neat diagrams 1200 mm x 900 mm of piping systems to identify equipment and
valves.
B. Insert legible page size copies into each Operating and Maintenance Manual.
C. Install diagrams, framed under glass, on Equipment Room walls where directed by
Owner.
PART 2 – PRODUCTS
2.1
INSERTS
A. Submit proposed materials and methods for cast-in-place inserts.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
B. Where inserts must be placed after concrete is poured, use Phillips Red Head Multiset II
Anchor system, Grinell, Myatt, Unistrut or locally-fabricated of equivalent quality.
2.2
PIPE AND EQUIPMENT SUPPORTS AND RESTRAINTS
A. Vibration Isolators: Refer to Section 15071.
B. In lieu of the paragraph which follows, suspended equipment support and restraints may
be designed and installed in accordance with the National Uniform Seismic Installation
Guidelines (NUSIG), most current edition. Submittals based on either the NUSIG
guidelines or the following paragraphs of this Section shall be stamped and signed by a
professional. Support of suspended equipment over 227kg (500 pounds) shall be
submitted for approval of the Consultant in all cases. See paragraph 2.2.M for lateral
force design requirements.
C. Supports For Roof-Mounted Items:
1. Equipment: Equipment rails shall be hot dipped galvanized steel, minimum 1.3 mm
(18 gauge), with integral baseplate, continuous welded corner seams, factory
installed 50 mm by 100 mm (2 by 4) treated wood nailer, 1.3 mm (18 gauge)
galvanized steel counter flashing cap with screws, built-in cant strip, (except for
gypsum or tectum deck), minimum height 280 mm (11 inches). For surface insulated
roof deck, provide raised cant strip to start at the upper surface of the insulation.
2. Pipe/duct pedestals: Provide a hot dipped galvanized unistrut channel welded to Ushaped mounting brackets which are secured to side of rail with galvanized lag bolts.
D. Type Numbers Specified: MSS SP-58. For selection and application refer to MSS SP-69.
Refer to Section 19 Part 4, for miscellaneous metal support materials and prime coat
painting.
E. For Attachment to Concrete Construction:
1. Concrete insert: Type 18, MSS SP-58.
2. Self-drilling expansion shields and machine bolt expansion anchors: Fed. Spec. FF-S325, permitted in concrete not less than 102 mm (four inches) thick. Applied load
shall not exceed one-fourth the proof test load listed in Fed. Spec. FF-S-325.
3. Power-driven fasteners: Permitted in existing concrete or masonry not less than 102
mm (four inches) thick when approved by the Consultant for each job condition.
Applied load shall not exceed one-fourth the proof test load listed in Fed. Spec. FF-S325.
F. For Attachment to Steel Construction: MSS SP-58.
1. Welded attachment: Type 22.
2. Beam clamps: Types 20, 21, 28 or 29. Type 23 C-clamp may be used for individual
copper tubing up to 23mm (7/8-inch) outside diameter.
G. Attachment to Metal Pan or Deck: As required for materials specified in Section 19 Part 2
and Section 19 Part 3.
H. For Attachment to Wood Construction: Wood screws or lag bolts.
I.
Hanger Rods: Hot-rolled steel, ASTM A36 or A575 for allowable load listed in MSS SP-58.
For piping, provide adjustment means for controlling level or slope. Types 13 or 15 turnbuckles shall provide 38 mm (1-1/2 inches) minimum of adjustment and incorporate
locknuts. All-thread rods are acceptable.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
J.
Multiple (Trapeze) Hangers: Galvanized, cold formed, lipped steel channel horizontal
member, not less than 41mm by 41mm (1-5/8 inches by 1-5/8 inches), 2.7 mm (No. 12
gage), designed to accept special spring held, hardened steel nuts. Not permitted for
steam supply and condensate piping.
1. Allowable hanger load: Manufacturers rating less 91kg (200 pounds).
2. Guide individual pipes on the horizontal member of every other trapeze hanger with 6
mm (1/4-inch) U-bolt fabricated from steel rod. Provide Type 40 insulation shield,
secured by two 13mm (1/2-inch) galvanized steel bands, or pre-insulated calcium
silicate shield for insulated piping at each hanger.
K. Pipe Hangers and Supports: (MSS SP-58), use hangers sized to encircle insulation on
insulated piping. Refer to Section 15080, for insulation thickness. To protect insulation,
provide Type 39 saddles for roller type supports or preinsulated calcium silicate shields.
Provide Type 40 insulation shield or preinsulated calcium silicate shield at all other types
of supports and hangers including those for preinsulated piping.
1. General Types (MSS SP-58):
a.
b.
c.
d.
e.
f.
g.
h.
Standard clevis hanger: Type 1; provide locknut.
Riser clamps: Type 8.
Wall brackets: Types 31, 32 or 33.
Roller supports: Type 41, 43, 44 and 46.
Saddle support: Type 36, 37 or 38.
Turnbuckle: Types 13 or 15. preinsulate
U-bolt clamp: Type 24.
Copper Tube:
1) Hangers, clamps and other support material in contact with tubing shall be
painted with copper colored epoxy paint, plastic coated or taped with non
adhesive isolation tape to prevent electrolysis.
2) For vertical runs use epoxy painted or plastic coated riser clamps.
3) For supporting tube to strut: Provide epoxy painted pipe straps for copper
tube or plastic inserted vibration isolation clamps.
4) Insulated Lines: Provide pre-insulated calcium silicate shields sized for copper
tube.
i.
Supports for plastic or glass piping: As recommended by the pipe manufacturer
with black rubber tape extending (25 mm) one inch beyond steel support or
clamp.
2. HVAC Piping (Other Than General Types): (WHERE APPLICABLE)
a. Medium and high pressure steam: (Not Applicable)
Spring Supports (Expansion and contraction of vertical piping):
1) Movement up to 20 mm (3/4-inch): Type 51 or 52 variable spring unit with
integral turn buckle and load indicator.
2) Movement more than 20 mm (3/4-inch): Type 54 or 55 constant support unit
with integral adjusting nut, turn buckle and travel position indicator.
3. Convertor and Expansion Tank Hangers (Where Required): May be Type 1 sized for
the shell diameter. Insulation where required will cover the hangers.
4. Plumbing Piping (Other Than General Types):
a. Horizontal piping: Type 1, 5, 7, 9, and 10.
b. Chrome plated piping: Chrome plated supports.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
c.
Hangers and supports in pipe chase: Prefabricated system ABS self-extinguishing
material, not subject to electrolytic action, to hold piping, prevent vibration and
compensate for all static and operational conditions.
d. Blocking, stays and bracing: Angle iron or preformed metal channel shapes, 1.3
mm (18 gage) minimum.
L.
Pre-insulated Calcium Silicate Shields (Where Required):
1. Provide 360 degree water resistant high density 965 kPa (140 psi) compressive
strength calcium silicate shields encased in galvanized metal.
2. Pre-insulated calcium silicate shields to be installed at the point of support during
erection.
3. Shield thickness shall match the pipe insulation.
4. The type of shield is selected by the temperature of the pipe, the load it must carry,
and the type of support it will be used with.
a. Shields for supporting cold water shall have insulation that extends a minimum of
one (1 inch) 25 mm, past the sheet metal. Provide for an adequate vapor barrier
in chilled lines.
b. The pre-insulated calcium silicate shield shall support the maximum allowable
water filled span as indicated in MSS-SP 69. To support the load, the shields may
have one or more of the following features: structural inserts 4138 kPa (600 psi)
compressive strength, an extra bottom metal shield, or formed structural steel
(ASTM A36) wear plates welded to the bottom sheet metal jacket.
5. Shields may be used on steel clevis hanger type supports, roller supports or flat
surfaces.
M. Seismic Restraint of Piping:
1. Design criteria is as follows:
a. Piping resiliently supported: 120 percent of the weight of the systems and
components and contents.
b. Piping not resiliently supported: 60 percent of the weight of the system
components and contents.
c. Except as noted above, meet the more severe requirements of the Local Code
and the latest Uniform Building Code for determining seismic force Fp.
2. Provide one of the following options:
a. Design and installation to meet the criteria listed above, and meet requirements
of the latest Sheet Metal and Air Conditioning Contractors National Association
(SMACNA), Seismic Restraint Manual Guidelines for Mechanical Systems for the
prescribed Seismic Hazard Level (SHL).
b. Design and installation to meet the criteria listed above, and meet the most
current requirements of the National Uniform Seismic Installation Guidelines
(NUSIG). Contractor shall submit all design tables and information for the design
force levels, stamped and signed by a professional engineer registered in the
place where project is located.
c. Where SMACNA or NUSIG requirements are not met completely, submit proposed
alternate details and calculations to completely address seismic bracing
requirements. Such designs shall use more severe of the Local Code and
the Uniform Building Code requirements for determining seismic forces, and
be performed, stamped and signed by a professional engineer. Revise if
necessary any details shown on the contract drawings for vertical support and
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
lateral bracing, and submit for the approval of the Consultant to meet the design
criteria listed above.
2.3
PIPING ISOLATION (WHERE APPLICABLE)
A. GENERAL:
1. All cold water, flue gas, and other piping within mechanical rooms or within 50 feet
total pipe length (whichever is longer) of connected vibration-isolated equipment
(pumps, air handling units, etc.) and all of the above piping that is 12 inches or
larger shall be isolated from the building structure by means of vibration-isolation
mounts, resilient pipe guides, and resilient penetration sleeve/seals.
2. Spring isolators shall be selected for a static deflection, under load of not less than I
inch Unit SLRS or 30N isolators (whichever is applicable to the mounting condition)
shall be used.
3. Where lateral support of pipe risers is required within the specified limits, this shall
be accomplished by use of resilient lateral supports.
4. Pipes within the specified limits that penetrate the building construction shall be
isolated from the building structure by use of resilient penetrating sleeve/seals.
5. Drain piping connected to vibration-isolated equipment shall not contact the building
structure or other non-isolated system unless it is resiliently mounted as described
above.
2.4
EQUIPMENT RIGGING SUPPORTS
A. Provide eyebolts suitable for block and tackle connection, adequately supported by the
structure above for:
1.
2.
3.
4.
5.
6.
2.5
Pumps
Large Fans
Motors
Fan Coil Units
Air Handlers
Other equipment which will require block and tackle handling
SLEEVES, WALL AND FLOOR PLATES (WHERE APPLICABLE)
A. Use machine cut and reamed standard weight steel piping. Pipe sleeves 200 mm and
larger shall have minimum 6 mm wall thickness.
B. Concealed perimeter risers and runouts may have sleeves of 1.31 mm galvanized steel
set around section of insulation to provide freedom of movement of piping. Extend 50
mm above finished floor level.
C. For piping through exterior walls, cooperate with the waterproofing trade at all times,
and do not break any waterproofing seal without consent of the waterproofing trade.
Provide waterproof link seals as detailed on Drawings.
D. Provide leak plates where pipe sleeves pass through exterior building walls. Each leak
plate shall be a 3.42 mm steel plate, welded to the sleeve, 100 mm diameter greater
than sleeve outside diameter.
E. Provide 1.31 mm galvanized steel duct sleeves. Provide adequate bracing for support of
sleeves during concrete and masonry work. For fire rated floors and walls, build fire
damper assemblies into structure to attain fire rated construction, in a manner acceptable
to the governing authorities.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
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Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
F. Cover pipe sleeves in walls and ceilings of finished areas, other than Equipment Rooms,
with satin finish stainless steel, or satin finish chrome or nickel plated brass escutcheons,
with non-ferrous set screws. Do not use stamped steel split plates. Split cast plates with
screw locks, however, may be used.
G. Cover exposed duct sleeves in finished areas with 1.31 mm galvanized steel plates in the
form of duct collars. Fix in position with non-ferrous metal screws.
2.6
PROVISION FOR PIPE EXPANSION, CONTRACTION AND BUILDING SHRINKAGE
(WHERE APPLICABLE)
A. Where space limitations do not permit the use of expansion loops or offsets, provide
expansion joint equal Mason or Honeywell Expansion Joints properly selected for system
operating pressures according to the following:
1. For piping up to and including 65 mm, select ends to suit specified pipe fittings.
Pressure shall be external to the bellows. Pressure ratings for Model H and HB
expansion compensated as 1400 kPa and 1050 kPa.
2. Steel Piping – Honeywell expansion compensator with two ply stainless steel bellows.
3. Copper Piping – Honeywell expansion compensator with two ply below, all bronze
construction.
4. For piping 75 mm and above, use flanged ends.
5. Steel Piping - Honeywell controlled, flexing expansion joint with stainless steel
pressure carrier, flanged ends.
6. Copper Piping - Honeywell controlled, flexing expansion joint with monel pressure
carrier, and brass flanged ends.
B. Submit for Consultant review prior to installation, drawings showing the location of
expansion joints, anchors and guides. Show details of proposed connection to structure
and loads to be imposed.
C. Recognize that the concrete structure will shrink. Design risers with sufficient flexibility.
Consult with structural engineer to determine the degree of flexibility.
2.7
DRAINS
A. Provide minimum 20 mm ball valve with hose end adapter, metal cap and chain at all low
points of all systems. Locate to allow easy connection of hose.
B. Provide 40 mm minimum size drains from ductwork connected to intake hoods and wall
louvers. Equip drains with deep seal traps. Locate traps in heated areas.
C. Provide 20 mm valves with metal caps and chains at the base of all pipe risers. Install
hose end ball valve in conjunction with 450 mm minimum length full line size dirt leg.
2.8
ACCESS DOORS AND PANELS
A. Provide access to concealed mechanical equipment and components which require
inspection, adjustment, repair and preventive maintenance. Install systems and
components to result in a minimum number of access doors and panels. Install
equipment and components in locations readily accessible through doors and panels.
B. Supply for installation by other Contractors, doors, panels and frames. Ensure that access
doors and panels are properly located.
C. Coordinate requirements for all access doors and panels to suit Architectural finishes and
large enough to provide adequate access to equipment and components.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-7
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. Check and coordinate Architect’s provision of access doors and panels with a fire rating
required by the code governing the fire rating of the structure.
E. In tile walls, and washroom walls, supply minimum 2.78 mm Type 304 stainless steel
with #4 finish, with recessed frame secured with stainless steel countersunk flush head
screws.
F. For all other surfaces, supply minimum 2.66 mm welded steel, flush type with
concealed hinges, lock and anchor strap, and factory prime coat finish.
2.9
FLASHING
A. Flashing will be carried out under each trade for roof curbs shown on their drawings.
B. Provide flashing for pipe openings or pre-manufactured roof curbs.
C. Carry out all counterflashing for roof mounted mechanical equipment and for pipes and
ducts passing through roof. Fit counterflashing over flashing or curb. Pitch pockets are
not acceptable.
2.10
CURBS
A. Curbs required for Division 15 work will be carried out under each trade.
B. Arrange and pay for Division 3 or Division 5 to provide other curbs and reinforcing steel
required for Division 15.
C. Pre-manufactured curbs for mechanical equipment mounted on roof will be supplied by
equipment manufacturer and they are specified under other Sections of this Division.
D. Curbs are required for roof mounted equipment, around ducts passing through roof and
surrounding holes where groups of pipes and/or ducts pass through Equipment Room
floors, Kitchens and similar areas where water dams are required.
E. Provide roof curbs at least 300 mm above finished roof, unless exceeded by
Architectural considerations.
F. Provide concrete curbs around holes in Equipment Room floors, extending at least 150
mm above finished floor. Make watertight connection between curb and floor.
G. Fill spaces between curbs and pipes and ducts with firestopping material similar to
“Rectorseal” or equal. Caulk watertight with manufacturer’s recommended fire resistant
waterproof compound.
2.11
CONCRETE
A. Coordinate with Division 3 provision of 100 mm concrete housekeeping pads under all
floor mounted mechanical equipment and supports. Extend pads over the full equipment
base and isolator area.
B. Concrete work, including housekeeping pads, required for Division 15 work and shown on
the Structural or Architectural Drawings will be provided by Division 3.
2.12
COVERS (BY OTHER DIVISIONS)
A. Supply frames for installation by Division 3.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-8
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
B. Provide covers for pits and sumps.
C. Provide gas tight gaskets for sewage pits.
D. Trench gratings will be provided by Division 5.
2.13
STEEL
A. Provide steel required for Division 15 work including supports, framing of openings and
lintels over openings that is not shown on Structural or Architectural Drawings.
B. Provide steel of adequate strength to support equipment and materials during all
operating and test conditions.
C. Support suspended equipment from the bottom or from manufacturer's designated
suspension points. Support tanks and similar equipment with adequate beam strength by
saddles with curvature to match the equipment. Continuously support other equipment.
D. Provide base supports for all pipe risers. Design to distribute operating and static loads to
meet Consultant requirements.
E. Fabricate steel supports in contact with water or humidity conditions from materials
having approved corrosion resistance or galvanize after fabrication or brush welds clean
and apply a prime coat of rust inhibiting paint.
2.14
BELT DRIVES (WHERE APPLICABLE)
A. Type: ANSI/RMA standard V-belts with proper motor pulley and driven sheave. Belts shall
be constructed of reinforced cord and rubber.
B. Dimensions, rating and selection standards: ANSI/RMA IP-20 and IP-21.
C. Minimum Horsepower Rating: Motor horsepower plus recommended ANSI/RMA service
factor (not less than 20 percent) in addition to the ANSI/RMA allowances for pitch
diameter, center distance, and arc of contact.
D. Maximum Speed: 25 m/s (5000 feet per minute).
E. Adjustment Provisions: For alignment and ANSI/RMA standard allowances for installation
and take-up.
F. Drives may utilize a single V-Belt (any cross section) when it is the manufacturer's
standard.
G. Multiple Belts: Matched to ANSI/RMA specified limits by measurement on a belt
measuring fixture. Seal matched sets together to prevent mixing or partial loss of sets.
Replacement, when necessary, shall be an entire set of new matched belts.
H. Sheaves and Pulleys:
1.
2.
3.
4.
5.
Material: Pressed steel, or close grained cast iron.
Bore: Fixed or bushing type for securing to shaft with keys.
Balanced: Statically and dynamically.
Groove spacing for driving and driven pulleys shall be the same.
Minimum Diameter of V-Belt Sheaves (ANSI/RMA recommendations) in millimeters
and inches:
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-9
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
Fractional Horsepower
Cross
Min. od
Section
mm (in)
2L
20 (0.8)
3L
38 (1.5)
4L
64 (2.5)
5L
89 (3.5)
I.
Standard
Cross
Section
A
B
C
D
E
Min. od
mm (in)
83 (3.25)
146 (5.75)
239 (9.40)
345 (13.60)
554 (21.80)
High Capacity
Cross
Min. od
Section
mm (in)
3V
67 (2.65)
4V
180 (7.10)
5V
318 (12.50)
Drive Types, Based on ARI 435:
1. Provide adjustable-pitch or fixed-pitch drive as follows:
a. Fan speeds up to 1800 RPM: 7.5 kW (10 horsepower) and smaller.
b. Fan speeds over 1800 RPM: 2.2 kW (3 horsepower) and smaller.
2. Provide fixed-pitch drives for drives larger than those listed above.
3. The final fan speeds required to just meet the system CFM and pressure
requirements, without throttling, shall be determined by adjustment of a temporary
adjustable-pitch motor sheave or by fan law calculation if a fixed-pitch drive is
used initially.
2.15
DRIVE GUARDS
A. For machinery and equipment, provide guards as shown in AMCA 410 for belts, chains,
couplings, pulleys, sheaves, shafts, gears and other moving parts regardless of height
above the floor. Drive guards may be excluded where motors and drives are inside
factory fabricated air handling unit casings.
B. Materials: Sheet steel, cast iron, expanded metal or wire mesh rigidly secured so as to be
removable without disassembling pipe, duct, or electrical connections to equipment.
C. Access for Speed Measurement: 25 mm (one inch) diameter hole at each shaft center.
2.16
FIRESTOPPING
Section 07841 specifies an effective barrier against the spread of fire, smoke and gases
where penetrations occur for piping and ductwork. Refer to Section 15080, for firestop pipe
and duct insulation.
2.17
TOOLS AND LUBRICANTS
A. Furnish, and turn over to the Consultant, special tools not readily available commercially,
that are required for disassembly or adjustment of equipment and machinery furnished.
B. Grease Guns with Attachments for Applicable Fittings: One for each type of grease
required for each motor or other equipment.
C. Tool Containers: Hardwood or metal, permanently identified for intended service and
mounted, or located, where directed by the Consultant.
D. Lubricants: A minimum of 0.95 L (one quart) of oil, and 0.45 kg (one pound) of grease,
of equipment manufacturer's recommended grade and type, in unopened containers and
properly identified as to use for each different application.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-10
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
PART 3 – EXECUTION
3.1
EXCAVATION AND BACKFILL (WHERE APPLICABLE)
A. Conform to the requirements of Division 2.
B. Read subsurface information data.
C. Excavation and backfill required for Division 15 work inside the building and to a point 1.5
m outside building shall be carried out by the Division listed in the following schedule:
1. Excavation
Initial excavation to 150 mm above pipe inverts
2. Final excavation to pipe inverts
3. Backfill
Initial backfill with sand to 300 mm above top of pipes
4. Final backfill
Division 2
Division 15
Division 15
Division 2
D. Ensure that excavation work is executed to attain required inverts and grades.
E. Remove material excavated by Division 15 and not to be reused, from the site.
F. Carefully prepare the bottom of pipe trench. Use one of the following bedding methods:
1. In firm undisturbed soil, lay pipe directly on the soil and shape soil to fit the lower
1/3 segment of pipe and fittings.
2. In rock, shale and where noted, excavate to 150 mm below and minimum 200 mm
on each side of pipe. Form 150 mm thick bedding using 10 mm crushed stone.
Provide continuous support over at least the lower 1/3 segment of pipe.
3. In unstable soil, in fill and where soil has been disturbed during previous excavation
work, excavate to at least 150 mm below bottom of pipe and form a reinforced
concrete cradle supporting full length between firm supports, or install piers down to
undisturbed solid soil. Piers shall be at a maximum spacing of 2400 mm. Provide at
least one pier for each pipe length. Support over at least the lower 1/3 segment of
pipe.
G. Where excavation is necessary close to and below the level of any footing, backfill with
14,000 kPa concrete to the level of the highest adjacent footing. Do not proceed with the
work prior to receiving written approval from Consultant.
H. Obtain approval from governing authorities and Consultant before backfilling.
I.
3.2
Provide backfilling materials as specified in Division 2. Lay and compact as specified in
Division 2.
PIPE, DUCT AND EQUIPMENT INSTALLATION (WHERE APPLICABLE)
A. Locate distribution systems, equipment and materials for maximum usable space,
optimum service clearances and to accommodate current requirements and identified
future expansion.
B. Coordinate Division 15 services installation above typical floor modular ceilings to allow
installation and future relocation of lights and air troffers without interfering with or
requiring relocation of mechanical, electrical or other services, or removal of ceiling grid.
C. Include all pipe and duct offsets required to eliminate interference with the work of other
Divisions.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-11
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. Install equipment and materials to present a neat appearance. Run piping, ducts and
conduit parallel to or perpendicular to building planes. Conceal piping, ducts and conduit
in finished areas. Install so as to require a minimum amount of furring.
E. Install pipe, duct and conduit straight, parallel and close to walls and slab or deck
underside, with specified pitch.
F. Use standard fittings for all direction changes. Do not use drilled tees and other field
fabricated fittings.
G. Install eccentric reducers in horizontal piping to permit drainage and eliminate air
pockets.
H. Where pipe sizes differ from connection sizes of equipment, provide reducing fittings
between inline components such as valves, strainers and fittings, and equipment.
Reducing bushings are not permitted.
I.
Cap open ends of piping during installation.
J.
Lay copper tubing so that it is not in contact with dissimilar metal and will not kink or
collapse.
K. Use non-corrosive lubricant or teflon tape equal to Dow Corning and apply on male
thread.
L.
Provide brass adaptors or dielectric couplings wherever dissimilar metals are joined.
M. No pipe to be laid in water or when, in opinion of Consultant conditions are unsuitable.
N. Ensure that pipe installation does not transmit vibration to the walls and floors through
which they pass.
O. Make provisions for neat insulation finish around equipment and materials.
mount equipment within insulation depth.
Do not
P. Provide, in electrical rooms and elevator machine rooms, drip trays under the entire
length of pipe within the confines of the room. Pipe drip tray to nearest floor drain.
Q. Perform welding to meet ANSI B31.9.
3.3
CONNECTIONS TO EQUIPMENT (WHERE APPLICABLE)
A. Provide unions or flanges at all connections to equipment. Ensure that piping adjacent to
equipment is readily removable for servicing and/or removal of equipment without
shutting down entire system.
B. Install unions in piping up to and including 50 mm pipe size. Install flanges in piping 65
mm pipe size and larger.
C. Prevent galvanic corrosion by isolating copper and steel. Use red brass adapters, or
completely isolate flanges using full face gaskets with bolts installed through phenolic
sleeves with insulating fibre washers. Where the Plumbing Code prohibits the use of red
brass adapters, use insulating couplings. Where system valves are required, solid brass
isolating valves may be used in lieu of adapters or couplings.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-12
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. Provide metallic code rated continuity link between flanges or unions, where pipe mains
carry flammable fluids or gases.
E. Make all plumbing and sheet metal connections to equipment provided by the Owner.
3.4
INSERTS
A. Size and space for the loads to be supported.
B. Properly locate and firmly secure inserts to forms before concrete is poured.
C. Place inserts only within main structure and not in any finishing materials.
D. When inserts are required in precast concrete, supply inserts and location drawings to
the precast concrete supplier for casting into material. Otherwise, include the cost of
having the precast concrete supplier install inserts at the site.
E. Do not use powder actuated tools.
3.5
HANGERS (WHERE APPLICABLE)
A. Suspend piping, ductwork and equipment with all necessary hangers and supports
required for a safe and neat installation. Ensure that pipes are free to expand and
contract and are graded properly. Adjust each hanger to take its full share of the weight.
B. Suspend hanger rods directly from the structure. Do not suspend pipes, ducts or
equipment from other pipes, ducts, equipment, metal work or ceilings.
C. Provide auxiliary structural steel angles, channels and beams where ductwork, piping and
equipment must be suspended between joists or beams.
D. Use galvanized rods, steel support angles, channels and beams where exposed to direct
contact with water or to possible high humidity conditions where condensation can occur.
E. Space hangers to ensure that structural steel members are not over stressed. In no case
shall pipe hangers be further apart than indicated in the tables.
When requested,
submit detailed drawings showing locations and magnitude of ductwork, piping and
equipment loads on the structure. Provide calculations when requested by Consultant.
F. Do not use trapeze type hangers for support of piping, without prior review by
Consultant. Where permitted, fabricate from angle or channel frames, and space hangers
to suit the smallest pipe size.
G. Do not use hooks, chains or straps to support equipment and materials.
H. For precast concrete work, if inserts cannot be cast into members, pass hanger rods
between the members and weld to steel plates resting on the upper surface of the
precast material. To prevent raising of the hanger rod, apply a lock nut and 50 mm
minimum dia. flat washer tight against the under surface of the precast material.
I.
Ensure that copper materials are completely isolated from ferrous materials. Use plastic
or epoxy coated hangers and clamps, or use lead inserts between copper piping and
ferrous materials, and between copper piping and copper coated ferrous materials.
J.
Provide round steel threaded rods meeting ASTM A-36.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-13
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
K. The following table establishes minimum standards of rod sizes and hanger spacing for
steel and copper piping.
Maximum Horizontal
Spacing of Supports
mm
Steel m
1.5
1.8
1.8
2.4
2.7
2.7
3.0
3.0
3.0
3.0
3.7
3.7
3.7
3.7
3.7
3.7
3.7
3.7
Pipe Size mm
12
20
25
32
40
50
65
75
90
100
125
150
200
250
300
350
400
450
Rod Size
10
10
10
10
10
10
12
12
12
16
16
20
22
22
22
25
25
29
Pipe Size mm
500
600
Maximum Horizontal
Spacing of Supports
Rod Size mm
Steel m
32
3.7
32
3.7
L.
Copper m
1.5
1.8
1.8
2.1
2.4
2.7
3.0
3.0
3.3
3.7
3.7
3.7
Copper m
In addition to these basic requirements, provide hangers in the following location:
1.
2.
3.
4.
5.
6.
7.
to eliminate vibration
at points of vertical and horizontal change of direction of pipe
at inline centrifugal pumps
at valves and strainers
on mains at branch takeoffs
to avoid stress on equipment connections
as required for seismic restraint
M. Install spring hangers or other special supports specified in Section 15071.
N. Support horizontal cast iron soil pipe at each hub. Where groups of fittings occur, not
more than three joints shall be between hangers.
O. Refer to applicable articles of the Specification regarding thermal insulation requirements.
Unless shown specifically on Drawings, provide the following support methods.
1.
For insulated condensate piping up to 65 mm diameter, support with hangers
directly on piping.
P. Generally, support ducts with 2.7 mm by 25 mm wide galvanized hangers or with 12 mm
dia. rods and 40 mm rolled angle saddles to meet SMACNA or ASHRAE Standards.
Q. Support vertical duct risers at each floor with rolled angle collars bearing on building
structure.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
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Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
3.6
SLEEVES, WALL PLATES, FLOOR PLATES
A. Set sleeves for piping and ductwork in conjunction with erection of floors and walls.
Locate sleeves accurately in accordance with submittal drawings, and as follows:
1. Through interior walls, set sleeves flush with finished surfaces on both sides.
2. Through exterior walls above grade, set sleeves flush with finished surfaces on inside
and to suit flashing on outside.
3. For floors in Mechanical Equipment Rooms, Janitors Closets, Kitchens and similar
areas where a water dam is required, set sleeves flush to underside of structure and
extending 50 mm above finished floor.
4. For other floors, set sleeves flush to both finished surfaces.
B. Size sleeves to provide 25 mm clearance around insulated piping and ductwork.
C. Ensure that fire ratings of floors and walls are maintained.
D. Provide continuous insulation runs through fire separations. Ensure that piping and
ductwork do not touch sleeves.
E. Pack clearance spaces with Rectorseal Metacaulk Firestopping materials strictly as
recommended by the manufacturer.
F. Install leak tight seals to meet the manufacturer's requirements. Select the inside
diameter of each wall sleeve opening to fit the pipe and leak tight seal, all to ensure
watertight joint.
G. Additional sleeving requirements:
1. Provide sleeves for systems not part of Contract, but identified to be required on
Drawings.
2. Provide sleeves to accommodate compressed air piping and wiring conduits required
for Division 15 work.
3. Utilize, insofar as possible, sleeves provided in other Contracts.
4. Provide additional sleeves as required by Drawings to accommodate service
requirements. Include for the cost of drilling and setting sleeves.
5. Fill unused sleeves with lime plaster.
3.7
PROVISION FOR PIPE EXPANSION, CONTRACTION AND BUILDING SHRINKAGE
(WHERE APPLICABLE)
A. Make provision for pipe expansion, contraction and building shrinkage with suitable
anchors and offsets or expansion loops.
B. Install piping to allow freedom of movement in all planes without imposing undue stress
on any section of main piping, branch piping, equipment and structure.
C. Use offsets at takeoffs to fans, fan coil units, pipe risers and other branch lines.
D. Select expansion joints for the calculated movement according to the following
temperature ranges.
1. For cold pipes, from minimum operating temperature to 38 deg C, plus 25% safety
factor.
2. For warm and hot pipes, from minimum ambient, but not lower than -5 deg C, to
maximum operating temperature plus 25% safety factor.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
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Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
E. When ambient temperature during installation is higher than operating temperature, use
precompressed expansion joints.
F. Select expansion joints to withstand system test pressure, as well as operating
pressures and temperatures.
G. Install expansion joints in accordance with manufacturers published installation
instructions.
H. During the construction and warranty periods, regularly review provisions for building
shrinkage and make necessary adjustments to piping to ensure freedom from binding
and stress.
3.8
PIPE GUIDES AND ANCHORS (WHERE APPLICABLE)
A. Install pipe guides for expansion joints according to expansion joint manufacturer's
published recommendations. Use at least two guides on each side of expansion joint.
B. Install manufactured or field fabricated alignment guides to allow movement in axial
direction only.
C. Install vertical risers properly anchored and guided to maintain accurate vertical position
of piping. At time of startup, clean and lubricate guides, and adjust to allow free sliding
at operating conditions.
D. For piping up to and including 75 mm, guide pipes at every floor or every 3900 mm.
Guide larger pipes at every second floor or every 7500 mm.
E. Fabricate anchors from structural steel channels, plates or angles.
F. Secure anchors to the structure. Avoid introduction of excessive reactive forces and
operating weights into the structure and onto equipment and piping.
G. Where guides are provided on cold piping, provide thermal break to prevent sweating.
3.9
PAINTING
A. Supply ferrous metal work except piping and galvanized and stainless steel ductwork,
with at least one factory prime coat, or paint one prime coat on job.
B. Clean and steel brush surfaces with welds. Then prime coat all steel supports and
brackets.
C. On uninsulated piping, steel brush and prime coat welds.
D. Touchup or repaint all surfaces damaged during shipment or installation and leave ready
for finish painting.
E. Prime coat material shall conform to, Approved Standards.
F. Finish painting will be provided under Section 09910.
3.10
MOTOR AND DRIVE ALIGNMENT (WHERE APPLICABLE)
A. Belt Drive: Set driving and driven shafts parallel and align so that the corresponding
grooves are in the same plane.
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-16
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
B. Direct-connect Drive: Securely mount motor in accurate alignment so that shafts are free
from both angular and parallel misalignment when both motor and driven machine
are operating at normal temperatures.
3.11
LUBRICATION
Field check and lubricate equipment requiring lubrication prior to initial operation.
3.12
STARTUP AND TEMPORARY OPERATION
Start up equipment as described in equipment specifications. Verify that vibration is within
specified tolerance prior to extended operation. Temporary use of equipment is specified in
Section 15010, Article, Temporary use of Mechanical and Electrical Equipment.
3.13
OPERATING AND PERFORMANCE TESTS
A. Prior to the final inspection, perform required tests as specified in Section 15010, Article,
Tests and submit the test reports and records to the Consultant.
B. Should evidence of malfunction in any tested system, or piece of equipment or
component part thereof, occur during or as a result of tests, make proper corrections,
repairs or replacements, and repeat tests at no additional cost to the Owner.
C. When completion of certain work or system occurs at a time when final control settings
and adjustments cannot be properly made to make performance tests, then make
performance tests for heating systems and for cooling systems respectively during first
actual seasonal use of respective systems following completion of work.
END OF SECTION 15050
SECTION 15050 - BASIC MECHANICAL MATERIALS AND METHODS
ME-003-17
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15071
MECHANICAL VIBRATIONS AND SEISMIC CONTROL
PART 1 – GENERAL
1.1
DESCRIPTION
Noise criteria, seismic restraints for equipment, vibration tolerance and vibration isolation for
HVAC Works.
1.2
RELATED WORK
A. Section 15050
B. Section 15815
1.3
-
Basic Mechanical Materials and Methods.
Metal Ducts and Accessories.
QUALITY ASSURANCE
A. Refer to article, QUALITY ASSURANCE in specification Section 15050.
B. Noise Criteria:
1. Noise levels in all 8 octave bands due to equipment and duct systems shall not
exceed following NC levels:
TYPE OF SPACE
General office space in excess of 5 meters
from the core mechanical rooms
Offices within 5.0 meters of the core
Lobbies, Corridors, Halls
Service Spaces, Parking Garages
NC CRITERIA (NC) LEVEL
35
40
45
45-50
2. After systems have been balanced, take sound measurements throughout the
complete range of audible frequencies from 63 Hz through 8000 Hz, in each occupied
area above, below and beside each Mechanical Equipment Room and where
directed. Plot readings on noise criteria NC curves.
3. Modify, as required and at no additional cost to the Owner, the fan
distribution and other mechanical systems to achieve the specified noise
criteria.
4. Submit a report, including sound curves, to substantiate that equipment has been
isolated adequately, and that acceptable noise levels have been attained. Provide a
list to indicate equipment in operation at time of readings taken. Certify report by
Professional Engineer.
5. Make sound measurements in accordance with the American Standard Method for
the Physical Measurement of Sound, ANSI S1.2.
6. Sound measuring equipment shall be Type 2 Class I in accordance with ANSI
Standards S1.4 or S1.11.
7. For equipment which has no sound power ratings scheduled on the plans, the
contractor shall select equipment such that the foregoing noise criteria, local
ordinance noise levels, and OSHA requirements are not exceeded. Selection
procedure shall be in accordance with ASHRAE Fundamentals Handbook 2001,
Chapter 7, Sound and Vibration.
8. An allowance, not to exceed 5db, may be added to the measured value to
compensate for the variation of the room attenuating effect between room test
condition prior to occupancy and design condition after occupancy which may
include the addition of sound absorbing material, such as, furniture. This allowance
may not be taken after occupancy. The room attenuating effect is defined as the
difference between sound power level emitted to room and sound pressure level in
room.
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
9. In absence of specified measurement requirements, measure equipment noise levels
three feet from equipment and at an elevation of maximum noise generation.
C. Seismic Restraint Requirements:
1. Equipment:
a. All mechanical equipment not supported with isolators external to the unit shall
be securely anchored to the structure. Such mechanical equipment shall be
properly supported to resist a horizontal force of 50 percent of the weight of the
equipment furnished.
b. All mechanical equipment mounted on vibration isolators shall be provided
with seismic restraints capable of resisting a horizontal force of 100 percent of
the weight of the equipment furnished.
2. Piping: Refer to specification Section 15050.
3. Ductwork: Refer to specification Section 15815.
D. Allowable Vibration Tolerances for Rotating, Non-reciprocating Equipment: Not to
exceed a self-excited vibration maximum velocity of 5 mm per second (0.20 inch per
second) RMS, filter in, when measured with a vibration meter on bearing caps of machine
in vertical, horizontal and axial directions or measured at equipment mounting feet
if bearings are concealed. Measurements for internally isolated fans and motors may
be made at the mounting feet.
1.4
SUBMITTALS
A. Manufacturer's Literature and Data:
1. Vibration isolators:
a.
b.
c.
d.
Floor mountings
Hangers
Snubbers
Thrust restraints
2. Bases.
3. Seismic restraint provisions and bolting.
4. Acoustical enclosures.
B. Isolator manufacturer shall furnish with submittal load calculations for selection of
isolators, including supplemental bases, based on lowest operating speed of equipment
supported.
C. Seismic Requirements: Submittals are required for all equipment anchors, supports
and seismic restraints. Submittals shall include weights, dimensions, standard
connections, and manufacturer's certification that all specified equipment will withstand
seismic Lateral Force requirements as shown on the documents.
D. In conjunction with vibration isolator supplier/manufacturer, the Contractor shall submit
official certification on vibration – free installation.
1.5
APPLICABLE PUBLICATIONS
The publications listed below form a part of this specification to the extent referenced.
The publications are referenced in the text by the basic designation only.
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
A. American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
(ASHRAE):
ASHRAE Fundamentals Handbook 2001 - Sound and Vibration, Chapter 7
B. American Society for Testing and Materials (ASTM):
A123/A123M
Zinc (Hot-Dip Galvanized) Coatings on major Iron and
Steel Components (except spring elements).
A884/A884M-02
-
Epoxy Coating on spring elements and other Iron and Steel
components.
A325
-
Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength
D2240
-
Standard
Test
Method
Durometer Hardness
Property
-
A216
-
Carbon Cast Steel top cup and bottom cup.
Occupational Safety and Health Administration (OSHA):
C.
29 CFR 1910
-
Guidelines for Noise Enforcement, Appendix A, 1983
for
Rubber
PART 2 – PRODUCTS
2.1
GENERAL REQUIREMENTS
A. Type of isolator, base, and minimum static deflection shall be as required for each
specific equipment application as recommended by isolator or equipment
manufacturer but subject to minimum requirements indicated herein and in the schedule
on the drawings.
B. Elastometric Isolators shall comply with ASTM D2240 and be oil resistant neoprene with a
maximum stiffness of 60 durometer and have a straight-line deflection curve.
C. Exposure to weather: Isolators, excluding springs, exposed to weather shall be hot dip
galvanized after fabrication. Hot-dip zinc coating shall not be less than 609 grams per
square meter (two ounces per square foot) by weight complying with ASTM A123 or
Epoxy Coating complying with ASTM A884/A884M-02.In addition provide limit stops to
resist wind velocity. Comply with the design wind velocity of 125 mph (200 kmph).
D. Uniform Loading: Select and locate isolators to produce uniform loading and deflection
even when equipment weight is not evenly distributed.
E. Color code isolators by type and size for easy identification of capacity.
2.2
SEISMIC RESTRAINT REQUIREMENTS FOR EQUIPMENT
A. Bolt pad mounted equipment, without vibration isolators, to the floor or other support
using ASTM A307 standard bolting, material or equal.
B. Floor mounted equipment, with vibration Isolators: Type SS. Where Type N isolators are
used provide channel frame base horizontal restraints bolted to the floor, or other
support, on all sides of the equipment Size and material required for the base shall be as
recommended by the isolator manufacturer.
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
C. On all sided of suspended equipment, provide bracing for rigid supports and provide
restraints for resiliently supported equipment. The slack cable restraint method, Mason
Industries, or equal, is acceptable.
2.3
VIBRATION ISOLATORS
A. Floor Mountings:
1. Double Deflection Neoprene: Shall include neoprene covered steel support plated
(top and bottom), friction pads, and necessary bolt holes.
Type: “Mason” SLFH, “VCS” NM or equal
2. Captive Spring Mount for Seismic Restraint:
a. Design mounts to resiliently resist seismic forces in all directions. Snubbing
shall take place in all modes with adjustment to limit upward, downward, and
horizontal travel to a maximum of 6 mm (1/4-inch) before contacting
snubbers. Mountings shall have a minimum rating of one G coefficient of
gravity as calculated and certified by a registered structural engineer.
b. All mountings shall have leveling bolts that must be rigidly bolted to the
equipment. Spring diameters shall be no less than 0.8 of the compressed height
of the spring at rated load. Springs shall have a minimum additional travel to
solid equal to 50 percent of the rated deflection. Mountings shall have ports for
spring inspection. Provide an all directional neoprene cushion collar around the
equipment bolt.
Type: “Mason” VMCI, “VCS” or equal
3. Spring Isolators with Vertical Limit Stops: Similar to spring isolators noted above,
except include a vertical limit stop to limit upward travel if weight is removed and
also to reduce movement and spring extension due to wind loads. Provide
clearance around restraining bolts to prevent mechanical short circuiting. Isolators
shall have a minimum seismic rating of one G.
Type: “Mason” VMCI, “VCS” or equal
4. Seismic Pad: Pads shall be felt, cork neoprene waffle, neoprene and cork
sandwich, neoprene and fiberglass, neoprene and steel waffle, or reinforced duck
and neoprene, with steel top plate and drilled for an anchor bolt. Washers
and bushings shall be reinforced duck and neoprene. Size pads for a maximum load
of 345 kPa (50 pounds per square inch).
Type “Mason” VMCI, “VCS” or equal
B. Hangers: Shall be combination neoprene and springs unless otherwise noted and shall
allow for expansion of pipe.
1. Combination Neoprene and Spring: Vibration hanger shall contain a spring and
double deflection neoprene element in series. Spring shall have a diameter not less
than 0.8 of compressed operating spring height. Spring shall have a minimum
additional travel of 50 percent between design height and solid height. Spring shall
permit a 15 degree angular misalignment without rubbing on hanger box.
Type: “Mason” VMCI, “VCS” or equal
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2. Spring Position Hanger: Similar to combination neoprene and spring hanger except
hanger shall hold piping at a fixed elevation during installation and include a
secondary adjustment feature to transfer load to spring while maintaining same
position.
Type: “Mason” VMCI, “VCS” or equal
3. Neoprene: Vibration hanger shall contain a double deflection type neoprene
isolation element. Hanger rod shall be separated from contact with hanger bracket by
a neoprene grommet.
Type: “Mason” VMCI, “VCS” or equal
4. Spring: Vibration hanger shall contain a coiled steel spring in series with a
neoprene grommet. Spring shall have a diameter not less than 0.8 of compressed
operating spring height. Spring shall have a minimum additional travel of 50 percent
between design height and solid height. Spring shall permit a 15 degree angular
misalignment without rubbing on hanger box.
Type: “Mason” VMCI, “VCS” or equal
5. The first four (4) Hanger supports from the vibrating equipment for piping 5 mm (2
inches) and larger shall have a pointer and scale deflection indicator.
Type: “Mason” VMCI, VCS or equal
C. Snubbers: Each spring mounted base shall have a minimum of four all-directional or
eight two directional (two per side) seismic snubbers that are double acting. Elastomeric
materials shall be shock absorbent neoprene bridge quality bearing pads, maximum 60
durometer, replaceable and have a minimum thickness of 6 mm (1/4 inch). Air gap
between hard and resilient material shall be not less than 3 mm (1/8 inch) or more than
6 mm (1/4 inch). Restraints shall be capable of withstanding design load without
permanent deformation.
Type: “Mason” VMCI, VCS or equal
D. Thrust Restraints: Restraints shall provide a spring element contained in a steel frame
with neoprene pads at each end attachment. Restraints shall have factory preset thrust
and be field adjustable to allow a maximum movement of 6 mm (1/4 inch) when the fan
starts and stops. Restraint assemblies shall include rods, angle brackets and other
hardware for field installation.
Type: “Mason” VMCI, VCS, or equal
2.4
BASES
A. Rails: Design rails with isolator brackets to reduce mounting height of equipment and
cradle machines having legs or bases that do not require a complete supplementary
base. To assure adequate stiffness, height of members shall be a minimum of 1/12 of
longest base dimension but not less than 100 mm (4 inches). Where rails are used
with neoprene mounts for small fans or close coupled pumps, extend rails to compensate
overhang of housing.
Type: “Mason” VMCI, VCS, or equal
B. Integral Structural Steel Base: Design base with isolator brackets to reduce mounting
height of equipment which require a complete supplementary rigid base. To assure
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
adequate stiffness, height of members shall be a minimum of 1/12 of longest base
dimension, but not less than 100 mm (four inches).
Type: “Mason” VMCSI, VCS, or equal
C. Inertia Base: Base shall be a reinforced concrete inertia base. Pour concrete into a
welded steel channel frame, incorporating prelocated equipment anchor bolts and
pipe sleeves. Level the concrete to provide a smooth uniform bearing surface for
equipment mounting. Provide grout under uneven supports. Channel depth shall be
minimum of 1/12 of longest dimension of base but not less than 150 mm (six inches).
Form shall include 13-mm (1/2-inch) reinforcing bars welded in place on minimum of
203 mm (eight inch) centers running both ways in a layer 40 mm (1-1/2 inches) above
bottom. Use height saving brackets in all mounting locations. Weight of inertia base shall
be equal to or greater than weight of equipment supported to provide a maximum peakto-peak displacement of 2 mm (1/16 inch).
Type: “Mason” VMCI, VCS or equal
D. Curb Mounted Isolation Base: Fabricate from aluminum to fit on top of standard curb
with overlap to allow water run-off and have wind and water seals which shall not
interfere with spring action. Provide resilient snubbers with 6 mm (1/4 inch) clearance
for wind resistance. Top and bottom bearing surfaces shall have sponge type
weather seals. Integral spring isolators shall comply with Spring Isolator (Type S)
requirements.
Type: “Mason” VMCI, VCS or equal
2.5
SOUND ATTENUATING UNITS
Refer to specification Section 15815.
2.6
ACOUSTICAL ENCLOSURES IN MECHANICAL ROOMS
Provide if necessary to meet the required NC criteria at no additional cost to the Owner.
Enclosures shall be removable and sectional, of a size and weight that sections can be readily
handled with typical lifting and moving equipment available in the equipment room.
Enclosures must contain access openings, observation ports, lights, and ventilation where
required for normal operation, observation and servicing.
2.7
VERTICAL RISER SUPPORT SYSTEM
All vertical risers subjected to thermal expansion and/or contraction shall be supported by
spring isolators and central anchors designed to insure loading within design limits at
structural support points. The riser design must be prepared and submitted for approval by
the same isolation vendor supplying the HVAC mechanical equipment isolation and must
include the initial load, initial deflection, change in deflection, final load and change in load at
all spring support locations. In order to minimize load changes, the initial spring deflection
must be at least 4 times the thermal movement. The submittal must also include anchor
loads when installed, cold filled, and at operating temperature. Include calculated pipe stress
at end conditions and branch off locations as well as installation instruction. The submittal
must be stamped and signed by a licensed professional engineer in the employ of the
vibration vendor for at least five years.
Proper provision shall be made for seismic protection in seismic zones.
The support spring mounts shall be Type SLF, anchors Type ADA, telescoping guides Type
VSG, all as manufactured by Mason Industries, Inc.
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -6
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
The isolation vendor shall provide and design all brackets at riser spring and anchor locations
where standard clamps lack capacity or do not fit. The contractor must install and adjust all
isolators under the supervision of the designing isolation vendor or his representative.
PART 3 – EXECUTION
3.1
INSTALLATION
A. Vibration Isolation:
1. No metal-to-metal contact will be permitted between fixed and floating parts.
2. Connections to Equipment: Allow for deflections equal to or greater than
equipment deflections. Electrical, drain, piping connections, and other items made to
rotating or reciprocating equipment (pumps, compressors, etc.) which rests on
vibration isolators, shall be isolated from building structure for first three hangers or
supports.
3. Common Foundation: Mount each electric motor on same foundation as driven
machine. Hold driving motor and driven machine in positive rigid alignment with
provision for adjusting motor alignment and belt tension. Bases shall be level
throughout length and width. Provide shims to facilitate pipe connections, leveling,
and bolting.
4. Provide heat shields where elastomers are subject to temperatures over 38
degrees C (l00 degrees F).
5. Extend bases for pipe elbow supports at discharge and suction connections at
pumps. Pipe elbow supports shall not short circuit pump vibration to structure.
6. Non-rotating equipment such as heat exchangers and convertors shall be mounted
on isolation units having the same static deflection as the isolation hangers or
support of the pipe connected to the equipment.
B. Inspection and Adjustments: Check for vibration and noise transmission through
connections, piping, ductwork, foundations, and walls. Adjust, repair, or replace isolators
as required to reduce vibration and noise transmissions to specified levels.
3.2
ADJUSTING
A. Adjust vibration isolators after piping systems are filled and equipment 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. Attach thrust limits at centerline of thrust and adjust to a maximum of 1/4inch (6mm) movement during start and stop.
D. Adjust active height of spring isolators.
E. Adjust snubbers according to manufacturer's recommendations.
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -7
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
F. Adjust seismic restraints to permit free movement of equipment within normal mode of
operation.
G. Torque anchor bolts according to equipment manufacturer's recommendations to resist
seismic forces.
SELECTION GUIDE FOR VIBRATION ISOLATORS
50 FT FLOOR SPAN
EQUIPMENT
BASE TYPE
COMPRESSORS AND VACUUM PUMPS
UP THROUGH 1-1/2HP
--2 HP AND OVER
500 – 750 RPM
--750 PRM & OVER
--PUMPS
CLOSE
UP TO 1- --COUPLED
2 HP
2 HP & I
OVER
BASE
I
S
MOUNTED
I
S
I
S
ROOF VENTILATORS
ABOVE OCCUPIED AREAS:
5 HP & OVER
CB
CETRIFUGAL BLOWERS
UP TO 50 HP
UP TO 200 RPM
B
201 – 300 RPM
B
301 – 500 RPM
B
501 RPM & OVER
B
60 HP & OVER
UP TO 300 RPM
I
301 – 500 RPM
I
501 RPM & OVER
I
INTERNAL COMBUSTION ENGINES
UP TO 25 HP
I
30 THRU 100 HP
I
125 HP & OVER
I
AIR HANDLING UNIT PACKAGES
SUSPENDED
UP THRU 5 HP
--7-1/2 HP & OVER
UP TO 500 RPM
--501 RPM & OVER
--FLOOR MOUNTED:
UP THRU 5 HP
--7-1/2 HP & OVER
UP TO 500 RPM
R
501 RPM & OVER
R
IN-LINE CENTRIFUGAL AND VANE AXIAL
UP THRU 50 HP:
UP TO 300 RPM
R
ISOL TYP E
MIN DEF
L
D, L, W
---
S
S
2.5
2.5
D, L, W
---
S
2”
2”
2”
2.5”
S
1.0
S
S
S
S
3.5
3.5
3.5
2.5
S
S
S
3.5
3.5
2.5
S
S
S
2.5
3.5
4.5
H
2”
H, THR
H, THR
2”
2”
S
2”
S, THR
2”
S, THR
2”
FANS, FLOOR MOUNTED:
S
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
3.5
ME-004 -8
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
301 – 500 RPM
501 RPM & OVER
60 HP & OVER
301 – 500 RPM
501 RPM & OVER
R
R
S
S
2.5
2.5
R
R
S
S
3.5
2.5
END OF SECTION 15071
SECTION 15071-MECHANICAL VIBRATIONS AND SEISMIC CONTROL
ME-004 -9
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15183
REFRIGERANT PIPING
PART 1 – GENERAL
1.1
DESCRIPTION
A. Field refrigerant piping for direct expansion HVAC systems. Field refrigerant piping and
associated drain and condenser water piping for walk-in refrigerators and freezers,
including required pipe insulation.
B. Definitions:
1. Refrigerating system: Combination of interconnected refrigerant-containing parts
constituting one closed refrigeration circuit in which a refrigerant is circulated for the
purpose of extracting heat.
a. Low side means the parts of a refrigerating system subjected to evaporator
pressure.
b. High side means the parts of a refrigerating system subjected to condenser
pressure.
2. Brazed joint: A gas-tight joint obtained by the joining of metal parts with alloys
which melt at temperatures higher than 427 degrees C (800 degrees F) but less than
the melting temperatures of the joined parts.
1.2
RELATED WORK
A. Section 15010 – Mechanical General Provisions
B. Section 15050 – Basic Mechanical Materials And Methods: General mechanical
requirements and items, which are common to more than one section of Division 15.
C. Section 15080 – Mechanical Insulation: Requirements for piping insulation.
D. Section 15181 – Hydronic Piping: Requirements for water and drain piping and
valves.
1.3
QUALITY ASSURANCE
A. Refer to specification Section 15010.
B. Comply with ASHRAE Standard 15, Safety Code for Mechanical Refrigeration. The
application of this Code is intended to assure the safe design, construction,
installation, operation, and inspection of every refrigerating system employing a fluid
which normally is vaporized and liquefied in its refrigerating cycle.
C. Comply with ASME Boiler and Pressure Vessel Code: Section IX: Welding and
Brazing Qualifications.
D. Products shall comply with UL 207 "Refrigerant–Containing Components and Accessories,
"Nonelectrical"; or UL 429 "Electrical Operated Valves."
1.4
SUBMITTALS
A. Submit in accordance with specification Section 15010.
SECTION 15183 - REFRIGERANT PIPING
ME-005-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
1. Sufficient
information
for
components
noted,
including
valves
and
refrigerant piping accessories, clearly presented, shall be included to determine
compliance with drawings and specifications for components noted below:
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
Tubing and fittings
Valves
Strainers
Moisture-liquid indicators
Filter-driers
Flexible metal hose
Liquid-suction interchanges
Oil separators (when specified)
Gages
Pipe and equipment supports
Flexible elastomeric pipe insulation
Refrigerant and oil
Pipe/conduit roof penetration cover
Soldering and brazing materials
2. Layout of refrigerant piping and accessories, including flow capacities, valves
locations, and oil traps slopes of horizontal runs, floor/wall penetrations, and
equipment connection details.
B. Certification: Copies of certificates for welding procedure, performance qualification
record and list of welders' names and symbols.
C. Design Manual: Furnish two copies of design manual of refrigerant valves and
accessories.
1.5
APPLICABLE PUBLICATIONS
The publications listed below form a part of this specification to the extent referenced.
The publications are referenced in the text by the basic designation only.
A. Air Conditioning and Refrigeration Institute (ARI):
495
760
-
Refrigerant Liquid Receivers
Solenoid Valves for Use with Volatile Refrigerants
B. American Society of Heating Refrigerating and Air Conditioning Engineers (ASHRAE):
15
17
-
63.1
69
-
Safety Code for Mechanical Refrigeration
Method of Testing Capacity of Thermostatic Refrigerant Expansion
Valves
Method of Testing Liquid Line Refrigerant Driers
Methods
of
Testing
Discharge
line
Refrigerant-Oil
Separators
C. American National Standards Institute (ANSI):
A13.1
B16.22
B16.24
-
B31.5
Z535.1
-
Scheme for Identification of Piping Systems
Wrought Copper and Copper Alloy Solder Joint Pressure Fittings
Cast Copper Alloy Pipe Flanges and Flanged Fittings, Class 150, 300,
400, 600, 900, 1500 and 2500, (Errata-1991, R (1998)
Refrigeration Piping
Safety Color Code
SECTION 15183 - REFRIGERANT PIPING
ME-005-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. American Society of Mechanical Engineers (ASME):
ASME
-
Boiler and Pressure Vessel Codes, Section 9 - Qualification Standard
for Welding and Brazing Procedures, Welders, Brazers, and Welding
and Brazing Operators
E. American Society for Testing and Materials (ASTM)
A126
-
B280
-
Gray Iron Castings for Valves, Flanges and Pipe Fittings. B32Standard Specification for Solder Metal
Standard Specification for Seamless Copper Tube for Air Conditioning
and Refrigeration Field Service
F. American Welding Society, Inc. (AWS):
A5.8
-
Standard Specification for Filler Metals for Brazing andBraze Welding.
G. Federal Specifications (FS):
GG - G -76 -
Gages, Pressure and Vacuum, Dial Indicating (for Air, Steam, Oil,
Water, Ammonia, Chloro-Flouro Hydrocarbon and Compressed
Gases)
H. National Electrical Manufacturer’s Association (NEMA):
NEMA 250 I.
Enclosure for Electrical Equipment (1000 Volts)
Underwriters Laboratories (U.L.):
UL 207
-
UL 429
-
Standard for Refrigerant-Containing Components and Accessories,
Nonelectrical
Standard for Electrically Operated Valves
PART 2 - PRODUCTS
2.1
PIPING AND FITTINGS
A. Refrigerant Piping: Copper refrigerant tube, ASTM B280, cleaned, dehydrated and
sealed, marked ACR on hard temper straight lengths. Coils shall be tagged ASTM B280 by
the manufacturer.
B. Water and Drain Piping: Copper water tube, ASTM B88, Type M or L, or refrigerant tube
ASTM B280.
C. Fittings, Valves and Accessories:
1. Solder joints: Wrought copper fittings, ANSI B16.22.
a. Solder, refrigerant tubing: Cadmium free, AWS A5.8, 45 percent silver brazing
alloy, Class Bag-5.
b. Solder, water and drain: 95-5 tin-antimony, ASTM B32 (95TA).
2. Flanges and flanged fittings: ANSI B16.24.
3. Refrigeration Valves:
SECTION 15183 - REFRIGERANT PIPING
ME-005-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
a. Stop Valves: Brass or bronze alloy, packless, or packed type with gas tight cap,
frost proof, backseating.
b. Pressure Relief Valves: Forged brass with nonferrous, corrosion resistant
internal working parts of high strength, cast iron bodies conforming to ASTM
A126, Grade B. Set valves in accordance with ASHRAE Standard 15.
c. Solenoid Valves: ARI 760, UL-listed, two-position, direct acting or pilot-operated,
moisture and vapor-proof type of corrosion resisting materials, designed for
intended service, and solder-end connections. Fitted with suitable NEMA 250
enclosure of type required by location and normally open holding coil.
d. Thermostatic Expansion Valves: Brass body with stainless- steel or noncorrosive non ferrous internal parts, diaphragm and spring- loaded (directoperated) type with sensing bulb and distributor having side connection for
hot-gas bypass and external equalizer. Size and operating characteristics as
recommended by manufacturer of evaporator and factory set for superheat
requirements. Solder-end connections. Testing and rating in accordance with
ASHRAE Standard 17.
e. Check Valves: Brass or bronze alloy with swing or lift type, with tight closing
resilient seals for silent operation; designed for low pressure drop, and with
solder-end connections. Direction of flow shall be legibly and permanently
indicated on the valve body.
4. Strainers: Designed to permit removing screen without removing strainer from
piping system, and provided with screens 80 to 100 mesh in liquid lines up to 30 mm
(1-1/8 inch), 60 mesh in liquid lines over 30 mm (1-1/8 inch), and 40 mesh in
suction lines. Provide strainers in liquid line serving each thermostatic expansion
valve, and in suction line serving each refrigerant compressor not equipped with
integral strainer.
5. Refrigerant Moisture/Liquid Indicators: Double-ported type having heavy sight
glasses sealed into forged bronze body and incorporating means of indicating
refrigerant charge and moisture indication. Provide screwed brass seal caps.
6. Refrigerant Filter-Dryers: UL listed, angle or in-line type, as shown on drawings.
Conform to ASHRAE Standard 63. Heavy gage steel shell protected with corrosionresistant paint; perforated baffle plates to prevent desiccant bypass. Size as
recommended by manufacturer for service and capacity of system with
connection not less than the line size in which installed. Filter driers with
replaceable filters shall be furnished with one spare element of each type and size.
7. Flexible Metal Hose: Seamless bronze corrugated hose, covered with bronze wire
braid, with standard copper tube ends. Provide in suction and discharge piping of
each compressor.
8. Liquid-Suction Heat Exchanger: Designed for counter flow and for free
drainage of oil. Size shall suit system conditions and refrigerant used. Interchangers
shall be ASME construction or UL listed.
9. Oil Separators: Provide for condensing units, as shown. All welded steel
construction with capacity to eliminate a minimum of 95 percent of the oil from the
hot gas flowing through it. Provide manufacturer's published ratings for minimum
and maximum refrigeration tonnage corresponding to this oil separating efficiency.
Conform to ASHRAE Standard 69. Separator shall be equipped with a float valve to
prevent return of the hot gas to crankcase, and shall have isolating stop valves so it
can be opened and services without pumping out any other part of the system. ASME
construction or UL listed.
10. Receivers: Conform to ARI 495, steel construction, equipped with tappings for
liquid inlet and outlet valves, pressure relief valve and liquid level indicator.
SECTION 15183 - REFRIGERANT PIPING
ME-005-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2.2
PRESSURE-TEMPERATURE GAGES
A. Fed. Spec. GG-G-76, Type III (freon), 65 mm (2-l/2 inch) minimum diameter, bottom
connection, one percent accuracy, graduated in kPa gage (psig) and corresponding
refrigerant temperature, with pressure snubber.
B. Provide board-mounted gages of the following ranges for each compressor. Provide gage
shut-off valve.
1. Suction: 101 kPa (30 inches Hg) vacuum to 1723 kPa (gage) (250 psig).
2. Discharge: 0 to 3445 kPa (gage) (0 to 500 psig).
2.3
THERMOMETERS AND WELLS
Refer to specification Section 15181.
2.4
PIPE SUPPORTS
Refer to specification Section 15050.
2.5
HEATING TAPE
Refer to specification Section 15181. Provide for freezer unit cooler drain piping.
2.6
REFRIGERANTS AND OILS
Provide required refrigerant and oil for proper system operation. Refrigerant gas to be
used shall be HFC-407C, HFC-410A or equivalent type.
2.7
PIPE/CONDUIT ROOF PENETRATION COVER
A. Prefabricated Roof Curb: Galvanized steel or extruded aluminum 300 mm (12
inches) overall height, continuous welded corner seams, treated wood nailer, 40 mm (11/2 inch) thick, 48 kg (3 pound) density rigid mineral fiberboard insulation with metal
liner, built-in cant strip (except for gypsum or tectum decks). For surface insulated roof
deck, provide raised cant strip (recessed mounting flange) to start at the upper
surface of the insulation. Curbs shall be constructed for pitched roof or ridge
mounting as required to keep top of curb level.
B. Penetration Cover: Galvanized sheet metal with flanged removable top. Provide 40 mm
(1-1/2 inch) thick mineral fiber board insulation.
C. Flashing Sleeves: Provide sheet metal sleeves for conduit and pipe penetrations of
the penetration cover. Seal watertight penetrations.
2.8
PIPE INSULATION FOR DX HVAC SYSTEMS
Refer to specification Section 15080.
2.9
PIPE INSULATION FOR WALK-IN REFRIGERATORS AND FREEZERS
A. Flexible elastomeric: Refer to specification Section 15080.
B. Insulate refrigerant suction piping from unit cooler to condensing unit. Use 20 mm (3/4inch) thick insulation on piping inside the refrigerator or freezer and 40 mm (1-1/2
inch) thick insulation (double layer required) on piping outside the refrigerated space.
SECTION 15183 - REFRIGERANT PIPING
ME-005-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
C. Insulate unit cooler drain piping in freezer units, over electric heat tracing tape, to
prevent drain from freezing during defrost.
PART 3 – EXECUTION
3.1
INSTALLATION
A. Install refrigerant piping and refrigerant containing parts in accordance with ASHRAE
Standard 15 and ANSI B31.5. Refrigerant piping shall be brazed with 15 percent silver
solder in accordance with AWS A5.8.
1. Install piping as short as possible, with a minimum number of joints, elbow and
fittings.
2. Install piping with adequate clearance between pipe and adjacent walls and
hangers to allow for service and inspection. Space piping, including insulation, to
provide 25 mm (one inch) minimum clearance between adjacent piping or other
surface. Use pipe sleeves through walls, floors, and ceilings, sized to permit
installation of pipes with full thickness insulation.
3. Locate and orient valves to permit proper operation and access for
maintenance of packing, seat and disc. Generally locate valve stems in overhead
piping in horizontal position. Provide a union adjacent to one end of all threaded
end valves. Control valves usually require reducers to connect to pipe sizes shown on
the drawing.
4. Use copper tubing in protective conduit when installed below ground.
5. Swab fittings and valves with manufacturer's recommended cleaning fluid to remove
oil and other compounds prior to installation.
6. Install hangers and supports per ANSI B31.5 and the refrigerant piping
manufacturer's recommendations.
B. Protect refrigerant system during construction against entrance of foreign matter, dirt
and moisture; have open ends of piping and connections to compressors, condensers,
evaporators and other equipment tightly capped until assembly.
C. Pass nitrogen gas through the pipe or tubing to prevent oxidation as each joint is
brazed. Cap the system with a reusable plug after each brazing operation to retain the
nitrogen and prevent entrance of air and moisture.
D. Pipe relief valve discharge to outdoors for systems containing more than 45 kg (100
pounds) of refrigerant.
E. Firestopping: Fill openings around uninsulated piping penetrating floors or fire walls, with
firestop material. For firestopping insulated piping refer to Section 15080.
F. Seismic Bracing: Refer to specification Section 15071, for bracing of piping.
3.2
PIPE AND TUBING INSULATION
A. Apply flexible cellular insulation and fabricate fittings in accordance with the
manufacturer's written instructions.
B. Use proper size material. Do not stretch or strain insulation.
C. To avoid undue compression of insulation, provide cork stoppers or wood inserts at
supports as recommended by the insulation manufacturer. Insulation shields are
specified under specification Section 15050.
SECTION 15183 - REFRIGERANT PIPING
ME-005-6
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. Where possible, slip insulation over the pipe or tubing prior to connection, and seal the
butt joints with adhesive. Where the slip-on technique is not possible, slit the insulation
and apply it to the pipe sealing the seam and joints with contact adhesive. Optional tape
sealing, as recommended by the manufacturer, may be employed.
E. Apply two coats of weather-resistant finish as recommended by the manufacturer to
insulation exposed to outdoor weather.
3.3
SIGNS AND IDENTIFICATION
A. Each refrigerating system erected on the premises shall be provided with an easily
legible permanent sign securely attached and easily accessible, indicating thereon the
name and address of the installer, the kind and total number of pounds of refrigerant
required in the system for normal operations, and the field test pressure applied.
B. Systems containing more than 50 kg (110 lb) of refrigerant shall be provided with
durable signs, in accordance with ANSI A13.1 and ANSI Z53.1, having letters not less
than 12.7 mm (0.5 inch) in height designating:
1. Valves and switches for controlling refrigerant flow, the ventilation and the
refrigerant compressor(s).
2. Signs on all exposed high pressure and low pressure piping installed outside the
machinery room, with name of the refrigerant and the letters "HP" or "LP."
3.4
FIELD QUALITY CONTROL
Prior to initial operation examine and inspect piping system for conformance to plans and
specifications and ASME 31.5. Equipment, material, or work rejected because of defects or
nonconformance with plans and specifications, and the Contractor shall correct ANSI codes
for pressure piping.
3.5
FIELD TESTS
A. After completion of piping installation and prior to initial operation, conduct test on
piping system according to ASME B31.5. Furnish materials and equipment required for
tests. Perform tests in the presence of Consultant. If the test fails, correct defects and
perform the test again until it is satisfactorily done and all joints are proved tight.
1. Every refrigerant-containing parts of the system that is erected on the
premises, except compressors, condensers, evaporators, safety devices, pressure
gages, control mechanisms and systems that are factory tested, shall be tested and
proved tight after complete installation, and before operation.
2. The high and low side of each system shall be tested and proved tight at not less
than the lower of the design pressure or the setting of the pressure-relief device
protecting the high or low side of the system, respectively, except systems erected
on the premises using non-toxic and non-flammable Group A1 refrigerants with
copper tubing not exceeding 16 mm (0.62 in) O.D. This may be tested by means of
the refrigerant charged into the system at the saturated vapor pressure of the
refrigerant at 20 degrees C (68 degrees F) minimum.
B. Test Medium: A suitable dry gas such as nitrogen or shall be used for pressure
testing. The means used to build up test pressure shall have either a pressure-limiting
device or pressure-reducing device with a pressure-relief device and a gage on the outlet
side. The pressure relief device shall be set above the test pressure but low enough to
prevent permanent deformation of the system components.
SECTION 15183 - REFRIGERANT PIPING
ME-005-7
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
3.5
SYSTEM TEST AND CHARGING
A. System Test and Charging: As recommended by the equipment manufacturer or as
follows:
1. Connect a drum of refrigerant to charging connection and introduce enough
refrigerant into system to raise the pressure to 70 kPa (10 psi) gage. Close valves
and disconnect refrigerant drum. Test system for leaks with halide test torch or
other approved method suitable for the test gas used. Repair all leaking joints and
retest.
2. Connect a drum of dry nitrogen to charging valve and bring test pressure to design
pressure for low side and for high side. Refer to Article 1.3, QUALITY ASSURANCE.
Test entire system again for leaks.
3. Evacuate the entire refrigerant system by the triplicate evacuation method with a
vacuum pump equipped with an electronic gage reading in mPa (microns). Pull the
system down to 665 mPa (500 microns) and hold for four hours then break the
vacuum with dry nitrogen (or refrigerant). Repeat the evacuation two more times
breaking the third vacuum with the refrigeration to be charged and charge with the
proper volume of refrigerant.
END OF SECTION 15183
SECTION 15183 - REFRIGERANT PIPING
ME-005-8
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15653
AIR CONDITIONING AND VENTILATION SYSTEM
PART 1 - GENERAL
1.1
DESCRIPTION OF WORK
The work includes providing air conditioning and ventilation system as described in Section
15000, Mechanical General Requirements for the Philippine Deposit Insurance Corporation.
1.2
REFERENCES:
The publications listed below form a part of this specification to the extent referenced. The
publications are referred to in the text by the basic designation only.
A.
B.
C.
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
ASTM A53
Pipe, Steel, Black, Welded and Seamless
ASTM A123
Zinc (Hot-Dip Galvanized)
Coatings on Iron and Steel Products
ASTM C553
Mineral Fiber Blanket
Felt Insulation (Industrial Type)
ASTM C1071
Thermal and Acoustical Insulation
(Mineral Fiber, Duct Lining Material)
ASTM E96
Water Vapor Transmission of
Materials
ASTM E437
Industrial Wire Cloth and Screens
(Square Opening Series)
NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)
NFPA 90A
Installation of Air Conditioning and
Ventilating Systems
NFPA 96
Ventilation Control and Fire Protection of
Commercial /Cooking Operation
SHEET METAL AND AIR CONDITIONING CONTRACTORS’
NATIONAL ASSOCIATION, INC. (SMACNA)
SMACNA HVACDCS
SMACNA HVACTAB
D.
HVAC Duct Construction Standard Metal
Flexible
HVAC Systems - Testing, Adjusting and
Balancing
And
UNDERWRITERS LABORATORIES (UL)
UL 181
Factory-Made Air Ducts and Connectors
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
1.3
SUBMITTALS
Submit shop drawings, manufacturer’s data and certificates for equipment, materials and
finish and pertinent details for each system and obtain approval from the Consultant before
procurement. Approval of the submittal shall not relieve the Contractor of the responsibility of
inspecting such materials or equipment for defects or non-conforming to the specifications.
Submittal shall include the manufacturer’s name, trade name, catalog model or number.
A.
Shop Drawings: Shop drawings shall include floor plans, sectional views,
wiring diagrams and installation details of equipment and equipment spaces
identifying and indicating proposed location, layout and arrangement of items
of equipment, control panels, accessories, piping and other items that must
be shown to assure a coordinated installation. Drawings shall indicate
adequate clearance for operation, maintenance and replacements of
operating equipment devices. If equipment is disapproved, drawings shall be
revised to show acceptable equipment and be resubmitted.
1. Air Conditioning system layout
B.
Manufacturer’s Data: Submittal for each manufactured item shall be
manufacturer’s descriptive literature or catalogued products, equipment
drawings, diagrams, performance and characteristic curves and catalog cuts.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
C.
Air Conditioning Units
Fans
Refrigerant Pipe Insulation
Duct Insulation
Sheet Metal
Grease Filters
Supply Air Filters
Diffusers
Dampers
Wall cap
Operation and Maintenance Manual
1. Air conditioning units
2. Fans
D.
Posted Operating Instruction
1. Air conditioning unit
2. Fans
E.
Field Test Report
1. Operational test of the system
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
PART 2 - PRODUCT
2.1
INSULATION
Refrigerant pipe insulation: Closed cell elastomeric thermal insulation, 20mm thick similar to
Aeroflex or polyolefin insulation similar to Betafoam or Thermobreak or approved equal.
Provide insulation shield with high density insulation at point of supports.
Air Conditioning Duct Insulation: Blanket flexible mineral fiber conforming to ASTM C553, 32
Kg/cu. M (2 pcf) density, 1 inch thick with integral vapor barrier for location inside the
building and 2 inches thick for exterior location. Insulation on exterior shall be provided with
cladding suitable for painting.
2.2
REFRIGERANT PIPING
Material and dimensional requirements for piping, valves, fittings and accessories shall
conform to ASHRAE 15 and ANSI B31.5. Refrigerant piping shall be cleaned, dehydrated,
charged and sealed. Refrigerant piping shall be type L, soft annealed copper tubing where
bending is required and hard drawn where no bending is required. Soft annealed copper
tubing shall not be used in sizes larger than 1-3/8 inches. Joints shall be brazed except that
joints on lines 7/8 inch and smaller may be flared.
2.3
AIR CONDITIONING UNITS
Air conditioning units shall be either single split (one fan coil to one air cooled condensing
unit) or a Multi split type (multiple fan coil units to one air cooled condensing units) as
indicated.
The separate assembly (fan coil unit and air-cooled condensing unit) shall be designed to be
used together and ratings shall be based on the use of matched assemblies. Coils shall be
extended surface fin and tube type with seamless copper tubes with aluminum fins securely
bonded to the tubes. Compressors shall be hermetic type. Compressor shall be provided with
vibration isolator. Air filters shall be cleanable type. Motors shall have thermal overload
protection. Fan coil or air handling unit’s casing shall be constructed of galvanized steel with
removable panel and access doors for inspection and access to internal parts. Casing shall be
insulated and shall have baked enamel finish. Supply fan shall be centrifugal fan with direct
driven motors and shall be isolated from the casing by internal vibration isolators. Cooling coil
shall have drain pans with piping connection to remove condensate. Seal coils to casing to
prevent leakage of air around the coil. Fan coil unit with size up to 7.5 tons shall have 3
speed fan control and remote controller.
Multi split air conditioning units shall be a Variable Refrigerant Volume or Flow also known as
inverter series system, VRV or VRF system. Pump down system shall be arranged. Provide
units completely piped, wired, charged, and factory tested as a package. The indoor and
outdoor units shall meet the cooling capability as specified on the Equipment Schedule. All
components shall be dehydrated, sealed and shipped with holding nitrogen
charge/refrigerant.
The VRF or VRV air conditioner shall employ R-22 or other approved refrigerant and will allow
variable refrigerant flow for energy saving capabilities. Compressor shall be equipped with
inverter Controller, and capable of changing the rotating speed of the compressor or other
approved method for changing the refrigerant flow to follow variations in cooling load.
Outdoor unit shall be suitable for one type or even mix-match connection of different type of
indoor units. Supplier shall also provide the necessary refrigerant pipe kits, and remote
controllers for each fan coil units. The VRV/VRF indoor units shall be consist of cooling coil
and direct electric motor driven fans. The VRV/VRF indoor unit shall be equipped with an
electronic expansion valve and a microprocessor type thermostat to control the refrigerant
flow individually.
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
Safety controls: Provide low refrigerant pressure protection and pressure relief device.
Provide compressor motor with thermal and overload protection, 5 minute anti-recycle timer,
and start capacitor kit. Provide compressor with electrical crankcase heater and internal high
pressure protection. The above safety controls are not required when scroll compressors are
provided.
Space temperature controls: Provide digital electronic controls including adjustable
programmable thermostats with COOL-FAN-OFF system switch and AUTO-ON fan switch. Fan
shall 3 speed control (low, medium & high) Thermostats shall be provided together with the
fan coil units Provide relays, transformers, contactors, and control wiring between
thermostats and unit.
Weatherproof casing: Provide removable gasketed panels designed to exclude driving rain for
access to fans, coils, filters, compressors, motors, and controls. Provide weatherproof outside
air intake louvers or weatherproof hoods with moisture eliminators.
Motor starter shall be magnetic across the line for motors less than 7.5 horse power and
reduced voltage part winding or wye-delta type for motors larger than 7.5 horsepower.
Breakers located outside shall be enclosed in weather proof enclosure. Sizes of wires,
conduits including installation shall in accordance with NFPA 70, National Electrical Code or
with Philippine Electrical Code.
2.4
WINDOW TYPE AIR CONDITIONING UNIT
Window type air conditioning unit shall be complete with decorative panel, adjustable supply
grille slide out chassis, cleanable air filters and three speed fan control. The preferred window
air conditioning units are the type that does not need drain piping to remove condensate
(drainless operation). Unit shall have powder coated finish. Unit shall be factory fabricated
and shall be ready for field installation. For units that are not accessible, provide remote
controller or a wall mounted controller to operate the unit. Operation of the units shall not
cause objectionable noise level in the occupied area. Select ac units so that sound power
level does not exceed 45 dB(A).
2.5
FANS
Statically and dynamically balanced with air capacities, horsepower and fan types and static
pressures as indicated. Fan bearing life shall have a minimum average life of 200,000 hours
at design operating conditions. Provide stainless steel screens for outdoor inlets and outlets.
Ceiling cassette type exhaust fan and wall mounted supply fan shall be provided as indicated.
Select fans so that sound power level does not exceed 50 dB(A). All exhaust fans shall
terminate outside using a wall cap with insect screens. Fans shall be manufactured by Kruger,
Niagara, and National or approved equal.
Kitchen exhaust fans shall be suitable for removing smoke and grease laden vapors and shall
be UL listed for removing grease laden air. Select fans so that sound power level does not
exceed 70 dB(A). Fans shall be manufactured by Kruger, Niagara, or approved equal.
Supply fans shall be centrifugal type, belt driven, in-line, SISW or DIDW as indicated. Select
fans so that sound power level does not exceed 70 dB(A). Provide filter box with cleanable air
filters for all supply fans. Size the air filter for maximum air velocity of 2.5 mps (500 fpm)
across the filter. Fans shall be manufactured by Kruger, Niagara, or approved equal.
Control System. Fans located in the central chilled water plant, transformer rooms and
elevator machine rooms shall be provided with an automatic temperature control system
(thermostat and controller) that will automatically start the fan when the room temperature
reached 95 degrees Fahrenheit. Toilet exhaust fans shall be manually operated with a switch
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
with an indicator light to indicate that fan is operating. Stair pressurization fan shall be
automatically activated upon detection of fire. It shall also be provided with static pressure
sensor to maintain pressure inside the stairwell at design static pressure.
2.6
AIR CONDITIONING AND VENTILATING DUCTS
Galvanized Steel Sheets: ASTM A527/527M; coating designation G90 construction, metal
gauge, hangers and supports, and reinforcements shall conform to SMACNA HVACDCS.
Ductwork shall be airtight and shall not vibrate or pulsate when system is in operation
Galvanized Steel Hot Dipped After Fabrication: ASTM A123.
Curve Elbows: Make a centerline radius not less than a 1 1/2 time the width diameter of the
duct. Short radius elbows are not acceptable.
Make airtight. No dust marks from air leaks shall show
grilles, registers, and diffusers.
at
duct joint or connections to
Laps: Make laps at joints in the direction of air flow space button-punch or bolt- connection in
standing seams at fixed centers not greater than 6 inches. Longitudinal locks or seams,
known as “button-punch snap-lock “may be used in lieu of Pittsburg Lock.
Fittings: Elbows, vaned elbows, take-off, branch connections, transitions, splitters, volume
dampers, fire dampers, flexible connections, and access doors shall conform to SMACNA
HVACDCS, Section 2.
Diffusers, Registers and Grilles: Construct diffusers, registers, and grilles of steel or
aluminum. Exterior and exposed edges shall be rolled or otherwise stiffened and rounded.
Steel parts shall be factory zinc phosphate treated prior to priming and painting or have a
baked-on enamel finish. Each ceiling diffuser and register shall have single key opposed blade
damper accessible on the room side of the diffuser or register. For linear diffusers, provide
single blade damper before the plenum box of the linear diffuser.
Flexible ducts and connectors: Provide flexible ducts as indicated in the drawings. UL 181,
Class I, UL listed, SMACNA HVACDCS, and additional requirements herein specified. Use to
connect between rigid ducts and outlets or terminals. There shall be no erosion, delimitation,
loose fibers, or odors from the ducts into the air stream. Flexible ducts shall be maximum 8
feet in length. Minimum bend radius shall be twice the duct diameter. Flexible duct shall be
interlocking spiral or helically corrugated zinc coated steel or corrosions resistant steel. Make
airtight slip joints, seal with pressure-sensitive vapor-seal adhesive tape or duct sealer, and
secure with sheet metal screws. To prevent insulation compression, place 2-inch wide by oneinch thick closed cell foam plastic spacer over the joint, use a zinc-coated steel or corrosionresistant steel clamp over such spacers.
2.7
MOTOR, STARTERS & DISCONNECT SWITCHES
NEMA, MG1, NEMA ICS2 and NEMA ACS6, respectively, with electrical characteristics as
indicated. Motors shall be drip-proof. Motor starters shall be magnetic-across-the-line for
motors less than 7.5 horsepower and reduced-voltage, part-winding or wye-delta type with
general–purpose water resistant enclosure for motors larger than 7.5 horsepower. Motor
efficiencies shall not be lower than 90%. For starters and disconnect switches located
outdoor, enclosures shall be weather -proof type.
2.8
KITCHEN EXHAUST DUCT
Kitchen exhaust duct shall be fabricated of B.I. sheet gage 16 with all continuous liquid-tight
welded joints. Installation shall conform to NFPA 96, Standard for the Installation of
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
Equipment for the Removal of Smoke Grease-Laden Vapors from Commercial Cooking
Equipment. Provide access panel for each duct bend.
PART 3 - EXECUTION
3.1
EQUIPMENT INSTALLATION
Refrigerant equipment and the installation thereof shall conform to ASHRAE 15. Necessary
supports shall be provided for equipment, appurtenances, pipe and tubing. These include
frames or supports for air conditioners, condensing units and other similar items requiring
supports. All floor mounted equipment shall be set on not less than 150mm concrete pad
doweled in place. Steel frames shall be painted with primer paint and two coats of finish
paint. Final coat of paint shall be the same color as adjacent surfaces. Install air cooled
condensing units in accordance with the manufacturer’s recommendation. Provide air
deflectors for horizontal discharge air cooled condensing units (accu) facing a wall or parapet
or any accu with a blocked discharge to redirect the air flow to prevent short circuiting of hot
air from the condenser.
Drain piping shall be provided with 1% slope towards the drain. Provide P-Trap for the
system at the outlet of the drip pan, the height of the trap should be greater by 50% than
the expected negative pressure in the pan. All drain pipes shall be insulated with 19 mm thick
insulation or approved equal.
3.2
REFRIGERANT PIPING
Joints in copper tubing shall be brazed with silver solder. Surplus brazing material shall be
removed at all joints in lines not insulated. Tubing shall be protected against oxidation during
brazing by using nitrogen in the tubes.
Provide pipe supports with maximum spacing of 1.5m (5 feet). Hangers shall be installed not
more than 1m (3 feet) from the ends of each run-out and not over 0.3 m (1 feet) from each
change of direction of piping.
Do not embed refrigerant pipes in concrete floors. Provide pipe sleeves from the indoor unit
(fan coil unit) to the exterior unit (air cooled condenser). Sleeve shall be big enough to
accommodate the refrigerant with insulation. Drain pipe can be located on the same pipe
sleeve if space will permit or the drain pipe can be directly embedded in the concrete floor.
All piping shall be tested to prove tightness before any part of an installation is concealed,
insulated or pipe covering applied. Where leaks occur, the defective part shall be replaced
and test repeated. After system is found to be without leaks, evacuate the system using a
reliable gauge and vacuum pump capable of pulling a vacuum of at least one mm Hg
absolute. Evacuate the system in strict accordance with the manufacturer’s instruction.
3.3
DUCT INSULATION
Do not insulate ducts until system tests have been completed and surfaces to be insulated
have been cleaned of dirt, rust, and scale and dried. Modify insulation to avoid obstruction
with other items. Do not use scrap pieces where full length section will fit. Insulation shall be
continuous through sleeves, wall and ceiling openings. Apply coatings and adhesives at the
manufacturer’s recommended coverage per gallon. Keep insulation dry during application of
finish. Provide insulation shields at each point of support.
Insulate supply and return ducts, kitchen exhaust ducts, outside air intake, plenums and
casings. Provide duct insulation and jacket on exterior of supply ducts, return ducts, outside
air intake ducts, and plenums, including metal on back of diffusers and registers. Apply
insulation with joints tightly butted.
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-6
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
Space pins or anchors at maximum of 305 mm (12 inch centers) secure insulation with
washers and clips. Pins or anchors shall be metal electrically welded to duct surface or shall
be metal attached to duct surface with waterproof adhesive especially designed for
attachment to metal surfaces. Sagging of duct insulation will not be permitted. Insulation
shall be tightly and smoothly applied to the ducts. Secure insulation to metal ducts with a
fire-resistant, waterproof bonding adhesive applied in 102 mm (4 inch wide) strips on 305
mm (12 inch) centers. Both exterior duct insulation and acoustical duct lining are required
when acoustical duct lining is indicated.
3.4
AIR DISTRIBUTION EQUIPMENT & DUCTWORKS
Install air distribution equipment as indicated and in accordance with the manufacturer’s
instructions. Provide clearance for inspection, repair, replacement and service. Electrical
work shall conform to NFPA 70.
Installation shall conform to NFPA 90A and SMACNA HVACDCS. Provide mounting and
supporting of ductwork and accessories including, but not limited to, structural supports,
hangers, vibration isolators, stands, clamps and brackets, access doors, and dampers. Install
ductwork and accessories as indicated and in accordance with the manufacturer’s printed
instruction. Duct dimension shown in the drawings refer to the ducts’ inside dimension. The
duct dimension shall be increased accordingly for those ducts with acoustical lining.
Allow clearance for inspection, repair, replacement, and service. When air distribution
systems are operated, there shall be no chatter, vibration, or dust marks. Remove all debris
and dirt from ducts and wipe clean. Before installing air outlets, use air handler to blow dry
air through the entire system at maximum attainable velocity.
Provide air deflectors in duct mounted supply outlets, take-off or extension collars to supply
outlets, and tap-in branch connections. Provide flexible connectors between air handling unit
or fan coil units and ducts. Provide inspection plates and test holes for testing and balancing
of the air distribution system.
3.5
3.6
FIELD TESTS
3.5.1
Preliminary Tests
For air conditioning units, fans and distribution equipment and its components,
perform an operational test for a minimum period of 8 hours. Adjust safety and
automatic control instruments as necessary to place them in proper operation and
sequence.
3.5.2
Testing and Balancing
After preliminary test, test, adjust and balance the air handling units and air
distribution system in accordance with SMACNA HVAC TAB. Prepare complete report
and submit to the Mechanical Engineering Consultant for Approval. TAB report shall
be signed by a Professional Mechanical Engineer who supervised the TAB works.
FIELD QUALITY CONTROL
The Contractor is responsible for the administration and direction of testaments. Furnish
instruments, equipment, connecting devices, and personnel for the tests. Notify the
Mechanical Engineering Consultant 5 working days before inspection or testing is scheduled.
Correct all defects in work. Repeat test until the work is in compliance.
END OF SECTION 15653
SECTION 15653 AIR CONDITIONING AND VENTILATION SYSTEM
ME-006-7
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15815
METAL DUCTS AND ACCESSORIES
PART 1 – GENERAL
1.1
DESCRIPTION
A. Ductwork and accessories for HVAC including the following:
1. Supply air, return air, outside air, exhaust, and relief systems.
B. Definitions:
1. SMACNA Standards as used in these specifications means the HVAC Duct
Construction Standards, Metal and Flexible.
2. Seal or Sealing: Use of liquid or mastic sealant, with or without compatible tape
overlay, or gasketing of flanged joints, to keep air leakage at duct joints, seams and
connections to an acceptable minimum.
3. Duct Pressure Classification: SMACNA HVAC Duct Construction Standards, Metal and
Flexible.
4. Exposed Duct: Exposed to view in a finished room.
1.2
RELATED WORK
A. Section 15010 - Mechanical General Provisions
B. Section 07841 - Through Penetration Firestopping Systems
C. Section 15050 - Basic Mechanical Materials and Methods
D. Section 15071 - Noise and Vibration Control
E. Section 15840 - Air Terminal Units
F. Section 15725 - Typical Air Handling Units
G. Section 15900 - HVAC Instrumentation and Controls
1.3
QUALITY ASSURANCE
A. Refer to article, QUALITY ASSURANCE, in Section 15010.
B. Fire Safety Code: Comply with NFPA 90A.
C. Duct System Construction and Installation: Referenced SMACNA Standards are the
minimum acceptable quality.
D. Duct Sealing: Air Leakage Criteria, and Air Leakage Tests:
1. All ducts shall be sealed as per SMACNAS duct sealing requirements in Section 1
of SMACNA HVAC Air Duct Leakage Test Manual for actual duct pressure classes
shown on the drawings. All ducts less than 500 Pa (2 inches w.g) pressure
classification shall meet requirements of class C seal.
2. At the beginning of the work, leak test representative samples of the duct
construction for each pressure class greater than 750 Pa (3 inches w.g). The sample
specimen shall be minimum 25% of the ductwork of the selected system
representing each pressure class, and shall include at least five transverse joints,
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
typical seams, an access door, and at least two typical branch connections and
an elbow. The sample specimen shall be part of the actual ductwork to be installed
for the project.
3. The leakage amount shall not exceed the permissible leakage rate in CFM per 100
square feet of duct surface for the pressure and leakage classes shown in table
below. The permissible leakage rate shall be calculated as per Section 4 of SMACNA
HVAC Air Duct Leakage Test Manual.
DUCT CONSTRUCTION CLASS
(Representing Pressure Class)
Leakage Class
2490 pa (10 inches w.g) and above
3
1500 pa (6 inches w.g)
6
1000 pa (4 inches w.g)
6
750 pa (3 inches w.g)
12
4. Follow leakage testing procedures, test apparatus, and test reports to be
submitted to the Consultant as per SMACNA HVAC Air Duct Leakage Test Manual. All
tests shall be performed in the presence of the Consultant. The Test and Balance
agency shall measure and record duct leakage as specified herein, and shall report
any unusual conditions to the Consultant and identify leakage source.
5. If a specimen fails to meet the permissible leakage level, the contractor shall modify
all ductwork installed represented by this specimen to bring it into compliance and
shall retest it until acceptable leakage is demonstrated to the Consultant.
6. Tests and re-tests and necessary repairs shall be completed prior to insulation and
concealment of ducts.
E. Duct accessories exposed to the air stream, such as dampers of all types (except
smoke dampers) and access openings, shall be of the same material as the duct or
provide at least the same level of corrosion resistance.
1.4
SUBMITTALS
A. Submit in accordance with Section 15010.
B. Manufacturer’s Literature and Data:
1. Rectangular ducts:
a. Schedules
of
duct
systems,
materials
and
selected
construction alternatives for joints, sealing, gage and reinforcement.
b. Duct liner.
c. Sealants and gaskets
d. Access doors.
SECTION 15815 METAL DUCTS AND ACCESSORIES
SMACNA
ME-007-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2. Round and flat oval duct construction details:
a.
b.
c.
d.
e.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Manufacturer’s details for duct fittings:
Duct liner.
Sealants and gaskets.
Access sections.
Installation instructions.
Volume dampers, back draft dampers.
Upper hanger attachments.
Fire dampers, fire doors, and smoke dampers with installation instructions.
Sound attenuators, including pressure drop and acoustic performance.
Flexible ducts and clamps, with manufacturer’s installation instructions.
Flexible connections.
Air intake/exhaust hoods.
Instrument test fittings.
Perforated distribution plates.
Diffusers, registers, grilles and accessories.
Details and design analysis of alternate or optional duct systems.
C. Coordination Drawings: Refer to article, DRAWINGS AND APPROVAL, in Section 15010.
1.5
APPLICABLE PUBLICATIONS
The publications listed below form a part of this specification to the extent referenced.
The publications are referenced in the text by the basic designation only.
A. Air Diffusion Council Test Code:
1062R4
-
Certification, Rating, and Test Manual (1977)
B. American Society for Testing and Materials (ASTM):
A167
-
A527
-
A569
-
B209
-
C1071
-
E84
-
Standard Specification for Stainless and Heat-Resisting ChromiumNickel, Steel Plate, Sheet and Strip
Standard Specification for Steel, Carbon (0.15 Maximum Percent),
Hot-Rolled Sheet and Strip, Commercial Quality.
Steel, Carbon (0.15 Maximum Percent), Hot Rolled Sheet and Strip,
Commercial Quality
Standard Specification for Aluminum and Aluminum-Alloy Sheet and
Plate
Standard Specification for Thermal and Acoustical Insulation (Mineral
Fiber, Duct Lining Material)
Standard Test Method for Surface Burning Characteristics of Building
Materials.
C. National Fire Protection Association (NFPA)
90A
-
96
-
Standard for the Installations of Air Conditioning and Ventilating
Systems.
Standard for the Installation of Equipment for the Removal of Smoke
and Grease-Laden Vapors from Commercial Cooking Equipment.
D. National Uniform Seismic Installation Guideline (NUSIG)
E. Sheet Metal and Air Conditioning Contractors National Association (SMACNA): HVAC Duct
Construction Standards, Metal and Flexible HVAC Air Duct Leakage Test Manual
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
Fibrous Glass Duct Construction Standards
Seismic Restraint Manual Guidelines for Mechanical Systems
F. Underwriters Laboratories, Inc. (UL):
181
555
555S
-
UL Standard for Safety Factory-Made Air Ducts and Connectors
UL Standard for Fire Dampers
UL Standard for Safety Leakage Rated Dampers for Use in Smoke
Control System
G. Australian Standards
AS 1682.1 – 1990
Fire dampers
Part 1 – Specifications
AS 1530.4 – 1990
Methods for fire tests on building materials, components and
structures
Part 4 – Fire-resistance tests of elements of building construction
H. ISO834: 1975
Fire-resistance tests – Elements of building construction
PART 2 – PRODUCTS
2.1
DUCT MATERIALS AND SEALANTS
A. General: Except for systems specified otherwise, construct ducts, casings, and
accessories of galvanized sheet steel, ASTM A527, coating G90 (“APO Galfan”); or
aluminum sheet, ASTM B209, alloy 1100, 3003 or 5052.
B. Specified Corrosion Resistant Systems: Stainless steel sheet, ASTM A167, Class 302 or
304, Condition A (annealed), Finish No. 4 for exposed ducts and Finish No. 2B for
concealed duct or ducts located in mechanical rooms.
1. Damper frames, damper blades and shafts, shall be stainless steel or PVC coated
galvanized steel, with non-ferrous bearing material.
C. Grease Duct: Double wall Metalbestos Model PS, factory-built grease duct, UL labeled
and complying with NFPA 96 may be furnished in lieu of specified materials for kitchen
and grill hood exhaust duct. Installation and accessories shall comply with the
manufacturers catalog data. Outer jacket or exposed ductwork shall be stainless steel.
Square and rectangular duct shown on the drawings will have to be converted to
equivalent round size.
D. Joint Sealing: Refer to SMACNA Standards, paragraph S1.8 and S1.9
1. Sealant: Elastomeric compound, gun or brush grade, maximum 25 flame spread
and 50 smoke developed (dry state) compounded specifically for sealing ductwork as
recommended by the manufacturer. Generally provide liquid sealant, with or without
compatible tape, for low clearance slip joints and heavy, permanently elastic, mastic
type where clearances are larger. Oil base caulking and glazing compounds are not
acceptable because they do not retain elasticity and bond.
2. Tape: Use only tape specifically designated by the sealant manufacturer and apply
only over wet sealant. Pressure sensitive tape shall not be used on bare metal or on
dry sealant.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
3. Gaskets in Flanged Joints: Soft neoprene.
E. Approved factory made joints such as DUCTMATE SYSTEM may be used.
2.2
DUCT CONSTRUCTION AND INSTALLATION
A. Follow SMACNA HVAC Duct Construction Standards.
B. Duct Pressure Classes: As shown on the drawings.
C. Seal Classes: As shown on the drawings and in accordance with SMACNA HVAC Air
Duct Leakage Test Manual.
D. Kitchen and Grill Hood (Ventilator) Exhaust Ducts: Comply with NFPA 96.
1. Material: 1.6mm (16 gage) steel sheet (black iron), ASTM A569, or 1.3mm (18
gage) stainless steel. Use stainless steel for exposed duct in occupied areas.
E. Round and Flat Oval Ducts: Furnish duct and fittings made by the same manufacturer to
insure good fit of slop joints. When submitted and approved in advance, round and flat
oval duct, with size converted on the basis of equal pressure drop, may be furnished in
lieu of rectangular duct design shown on the drawings.
1. Elbows: Diameters 80 through 200 mm (3 through 8 inches) shall be two
sections die stamped, all others shall be gored construction, maximum 18 degree
angle. With all seams continuously welded or standing seam. Coat galvanized areas
of fittings damaged by welding with corrosion resistant aluminum paint or galvanized
repair compound.
2. Provide bellmouth, conical tees or taps, laterals, reducers, and other low loss fittings
as shown in SMACNA Standards.
3. Ribbed Duct Option: Lighter gage round/oval duct and fittings may be furnished
provided certified tests indicating that the rigidity and performance is equivalent to
SMACNA standard gage ducts are submitted.
a. Ducts: Manufacturer’s published standard gage, G90 coating, spiral lock seam
construction with an intermediate standing rib.
b. Fittings: May be manufacturer’s standard as shown in published catalogs,
fabricated by spot welding and bonding with neoprene base cement or machine
formed seam in lieu of continuous welded seams.
4. Provide flat side reinforcement of oval ducts as recommended by the manufacturer
and SMACNA Standard S3.13. Because of high pressure loss, do not use internal tierod reinforcement unless approved by the Consultant.
F. Canopy Hoods, Reagent Grade Water Treatment Room Exhausts: Constructed of 1.3, (18
gauge) stainless steel.
G. Casings and Plenums: Construct in accordance with SMACNA Standards Section VI,
including curbs, access doors, pipe penetrations, eliminators and drain pans. Access
doors shall be hollow metal, insulated with latches and door pulls, 500 mm (20
inches) wide by 1200 - 1350 mm (48-54 inches) high. Provide viewport in the doors
where shown. Provide drain for outside air louver plenum. Outside air plenum shall have
exterior insulation. Drain piping shall be routed to the nearest floor drain.
H. Volume Dampers: Single blade or opposed blade, multi-louver type as detailed in
SMACNA Standards.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
I.
2.3
Duct Hangers and Supports: Refer to SMACNA Standards Section IV. Avoid use of trapeze
hangers for round duct.
DUCT LINER (WHERE INDICATED ON DRAWINGS)
A. Duct sizes shown on drawings for lined duct are clear opening inside lining.
B. Rectangular Duct or Casing Liner: ASTM C1071, Type I (flexible), or Type II (board), 25
mm (one inch) minimum thickness matte face with anti-microbial coating, applied with
mechanical fasteners and 100 percent coverage of adhesive in conformance with
SMACNA, Duct Liner Application Standard.
C. Round and Oval Duct Liner: Factory fabricated double-walled with 25 mm (one inch)
thick sound insulation and inner perforated galvanized metal liner. Construction shall
comply with flame and smoke rating required by NFPA 90A. Metal liner shall be 1.0 to
0.60 mm (20 to 24 gage) having perforations not exceeding 2.4 mm (3/32 inch)
diameter and approximately 22 percent free area. Metal liner for fittings need to be
perforated. Assemblies shall be complete with continuous sheet mylar liner, 2 mil
thickness, between the perforated liner and the insulation to prevent erosion of the
insulation. Provide liner couplings/spacer for outer shell to liner size. Provide liner
spacing/concentricity leaving airway unobstructed.
2.4
DUCT ACCESS DOORS, PANELS AND SECTIONS
A. Provide access doors, sized and located for maintenance work, upstream, in the
following locations:
1. Each duct mounted coil and humidifier.
2. Each fire damper (for link service), smoke damper and automatic control
damper.
3. Each duct mounted smoke detector.
4. For cleaning kitchen hood exhaust duct, locate access doors at 6 m (20 feet)
intervals and at each change in duct direction.
B. Openings shall be at large as feasible in small ducts, 300 mm (12 inch by 12 inch)
minimum where possible. Access sections in insulated ducts shall be double-wall,
insulated. Transparent shatterproof covers are preferred for uninsulated ducts.
1. For rectangular ducts: Refer to SMACNA Standards (Figure 2-12).
2. For round and flat oval duct: Access sections shall be not less than 1.0 mm (20
gage) housing welded or riveted to a duct section.
C. For additional details, refer to item 2.24 – G.
2.5
FIRE DAMPERS
A. Galvanized steel, interlocking blade type, UL listing and label, 1 ½ hour rating, 70 ºC
(160 ºF), fusible link, 100 percent free opening with no part of the blade stack or damper
frame in the air stream.
B. Fire dampers in fume hood exhaust or wet air exhaust shall be stainless steel
construction, all others may be galvanized steel.
1. The damper frame may be of design and length as to function as the
mounting sleeve, thus eliminating the need for a separate sleeve, as allowed by UL
555. Otherwise provide sleeves and mounting angles, minimum 1.9 mm (14
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-6
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
gage), required to provide installation equivalent to the damper manufacturer’s UL
test installation.
2. Submit manufacturer’s installation instructions conforming to UL rating test.
3. Combination fire and smoke dampers: multi-louver or curtain type units meeting all
requirements of both dampers shall be used where shown and may be used at
the Contractor’s option where applicable.
2.6
SMOKE DAMPERS
A. Maximum air velocity, through free area of open damper, and pressure loss: low
pressure and medium pressure duct (supply, return, exhaust, outside air): 450 m/min
(1500 fpm). Maximum static pressure loss: 32 Pa (0.13 inch WG).
B. Maximum air leakage, closed damper: 0.32 cubic meters/min/square meter (4.0 cfm
per square foot) at 750 Pa (3 inches wg) differential pressure.
C. Minimum requirements for dampers:
1. Meet requirements of Table 6-1 of UL 555S, except the Fire Endurance and Hose
Stream test.
2. Frame: Galvanized steel channel with side, top and bottom stops or seals.
3. Blades: Galvanized steel, parallel type preferably, 300 mm (12 inch) maximum
width, edges sealed with neoprene, rubber or felt, if required to meet minimum
leakage. Airfoil (streamlined) type for minimum noise generation and pressure drop
are preferred for duct mounted dampers.
4. Shafts: Galvanized steel.
5. Bearing: Nylon, bronze sleeve or ball type.
6. Hardware: Zinc plated.
7. Operation: Automatic open/close. No smoke damper that requires manual reset
or link replacement after actuation is acceptable. See drawings for required control
operation.
D. Motor operator (actuator): Provide pneumatic or electric as required by the automatic
control system, externally mounted on stand-offs to allow complete insulation coverage.
2.7
FIRE DOORS
Galvanized steel, interlocking blade type, UL listing and label, 71 ºC (160 ºF) fusible link, 3
hour rating and approved for openings in Class A fire walls with rating up to 4 hours, 100
percent free opening with no part of the blade stack or damper frame in the air stream.
2.8
FLEXIBLE AIR DUCT CONNECTORS
A. General: Factory fabricated, complying with NFPA 90A for connectors not passing
through floors of buildings. Flexible ducts shall not penetrate any fire or smoke
barrier which is required to have a fire resistance rating of one hour or more. Flexible
duct length shall not exceed 1.5 m (5 feet). Provide insulated acoustical air duct
connectors in supply air duct systems and elsewhere as shown.
B. Flexible ducts shall be listed by Underwriters Laboratories Inc., complying with UL 181.
Ducts larger than 200 mm (8 inches) in diameter shall be Class 1. Ducts 200 mm (8
inches) in diameter and smaller may be Class 1 or Class 2.
C. Insulated Flexible Air Duct: Factory made including mineral fiber insulation with
maximum C factor of 0.25 at 24 ºC (75 ºF) mean temperature, encased with a low
permeability moisture barrier outer jacket, having a puncture resistance of not less
than 50 Beach Units. Acoustic insertion loss shall not be less than 3 dB per 300 mm
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-7
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
(foot) of straight duct, at 500 Hz, based on 150 mm (6 inch) duct, of 750 m/min (2500
fpm).
D. Application Criteria:
1. Temperature range: - 18 to 93 ºC (0 to 200 ºF) internal.
2. Maximum working velocity: 1200 m/min (4000 feet per minute).
3. Minimum working pressure, inches of water gage: 2500 Pa (10 inches) positive, 500
Pa (2 inches) negative.
E. Duct Clamps: 100 percent nylon strap, 80 kg (175 pounds) minimum loop tensile
strength manufactured for this purpose or stainless steel strap with cadmium plated
worm gear tightening device. Apply clamps with sealant and as approved for UL 181,
Class 1 installation.
2.9
FLEXIBLE CONNECTIONS (WHERE APPLICABLE)
A. Where duct connections are made to fans and air handling units, install a noncombustible flexible connection of 822 g (29 ounce) neoprene coated fiberglass fabric
approximately 150 mm (6 inches) wide. For connections exposed to sun and weather
provide hypalon coating in lieu of neoprene. Burning characteristics shall conform to
NFPA 90A. Securely fasten flexible connections to round ducts with stainless steel or zinccoated iron draw band with worm gear fastener. For rectangular connections, crimp
fabric to sheet metal and fasten sheet metal to ducts by screws 50 mm (2 inches)
on center. Fabric shall not be stressed other than by air pressure. Allow at least 25
mm (one inch) slack to insure that no vibration is transmitted.
2.10
SOUND ATTENUATING UNITS
General: In addition to those shown on the schematic diagrams, the Contractor shall provide
duct-mounted sound attenuators where required to satisfy the Room Noise Criteria specified
under Section 15071, without additional cost to the Owner. Adjustments of fan ESP shall be
done accordingly.
Ordinary (Air Systems Having
85% Efficiency Air Filters)
A. Cleaning, not less than 1.0 mm (20 gage) galvanized sheet steel, or 1.3 mm (18 gage)
aluminum fitted with suitable flanges to make clean airtight connections to ductwork.
Sound-absorbent material faced with glass fiber cloth and covered with not less than
0.6 mm (24 gage) or heavier galvanized perforated sheet steel, or 0.85 mm (22 gage)
or heavier perforated aluminum. Perforations shall not exceed 4 mm (5/32-inch)
diameter, approximately 25 percent free area. Sound absorbent material shall be long
glass fiber acoustic blanket meeting requirements of NFPA 90A.
B. Entire unit shall be completely air tight and free of vibration and buckling at internal
static pressures up to 2000 Pa (8 inch water gage) at operating velocities.
C. Pressure drop through each unit: Not to exceed indicated value at design air
acoustical performance 80 Pascal maximum.
D. Cap open ends of attenuators at factory with plastic, heavy duty paper, cardboard, or
other appropriate material to prevent entrance of dirt, water, or any other foreign
matter to inside of attenuator. Caps shall not be removed until attenuator is installed in
duct system.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-8
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2.11
GRAVITY TYPE AIR INTAKE/EXHAUST HOODS
A. Aluminum, ASTM B209, louvered, spun, or fabricated using panel sections with rollformed edges, 13 mm (1/2 inch) mesh aluminum or galvanized welded wire bird screen,
with gravity or motorized dampers were shown, accessible interior, designed for 2200
km/h winds.
B. See hood schedule on the drawings. Sizes shown designate throat size. Area of hood
perimeter opening shall be not less than the throat area.
C. Dampers for Gravity Ventilators without Duct Connection: Construct damper of the same
material as the ventilator and design to completely close opening or remain wide
open. Hold damper in closed position by a brass chain and catch. Extend chains 300 mm
(12 inches) below and engage catch when damper is closed.
2.12
PREFABRICATED ROOF CURBS
Galvanized steel or extruded aluminum 300 mm (12 inches) above finish roof service,
continuous welded corner seams, treated wood nailer, 40 mm (1-1/2 inch) thick, 48 kg/cubic
meter (3 pound/cubic feet) density rigid mineral fiberboard insulation with metal liner, builtin cant strip (except for gypsum or tectum decks). For surface insulated roof deck, provide
raised cant strip (recessed mounting flange) to start at the upper surface of the
insulation. Curbs shall be constructed for pitched roof or ridge mounting as required to keep
top of curb level.
2.13
EQUIPMENT SUPPORTS
Section 15050.
2.14
FIRESTOPPING MATERIAL
Refer to Section 07841.
2.15
SEISMIC RESTRAINT FOR DUCTWORK
A. Ductwork shall be supported and braced to resist all directional (transverse,
longitudinal and vertical) forces.
B. Brace all duct branches, minimum of one brace per branch.
C. Provide required bracing material.
D. Provide one of the following options:
1. Design and installation to meet the criteria listed above, and meet
requirements of the latest Sheet Metal and Air Conditioning Contractors
National Association (SMACNA), Seismic Restraint Manual Guidelines for Mechanical
Systems for the prescribed Seismic Hazard Level (SHL).
2. Design and installation to meet the criteria listed above, and meet the most
current requirements of the National Uniform Seismic Installation Guidelines
(NUSIG). Contractor shall submit all design tables and information for the design
force levels, stamped and signed by a professional engineer registered in the place
where project is located.
3. Where SMACNA or NUSIG requirements are not met completely, submit proposed
alternate details and calculations to completely address seismic bracing
requirements. Such designs shall use more severe of the Local Code and the Uniform
Building Code requirements for determining seismic forces, and be performed,
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-9
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
stamped and signed by a professional engineer registered in the place where
project is located. Revise if necessary any details shown on the contract drawings
for vertical support and lateral bracing, and submit for the approval of the
Consultant to meet the design criteria listed above.
2.16
SHEET METAL DUCT ISOLATION
A. All sheet metal ducts and air plenums within mechanical rooms or within a distance of
50 feet total duct length of connected vibration-isolated equipment (whichever is longer)
shall be isolated from the building structure by either Unit SLRS or 30N isolators
(whichever is applicable to the mounting condition). All isolators shall achieve 1.0inch minimum static deflection.
B. Ducts within the specified limits which penetrate the building construction shall be
isolated from the building by using resilient penetration sleeve/seals. Resilient lateral
guides shall be used wherever lateral support of vertical duct runs is required within the
specified limits.
C. Flexible Duct Connections: Sheet metal ducts or plenum openings shall be squarely
aligned with the fan discharge, fan intake, or adjacent duct section prior to installation of
the flexible connection, so that the clear length is approximately equal all the way around
the perimeter. Flexible duct connections shall not be installed until this provision is met.
The fan unit or adjacent duct section shall be able to move 1 inch in any direction
without causing metal-to-metal contact or stretching taut the flexible connection.
2.17
THERMOMETER (AIR)
Section 15900 - HVAC Instrumentation and Controls.
2.18
INSTRUMENT TEST FITTINGS
A. Manufactured type with a minimum 50 mm (two inch) length for insulated duct, and a
minimum 25 mm (one inch) length for duct not insulated. Test hole shall have a flat
gasket for rectangular ducts and a concave gasket for round ducts at the base, and a
screw cap to prevent air leakage.
B. Provide instrument test holes at each duct or casing mounted temperature sensor or
transmitter, and at entering and leaving side of each heating coil, cooling coil, and
heat recovery unit.
2.19
CONSTANT AIRFLOW REGULATOR (CAR)
Each regulator shall solely operate on duct pressure and require no external power supply.
Each regulator shall be preset and factory calibrated requiring no field adjustment to the
airflows as indicated on the design drawing, and shall be rated for use in air temperatures
ranging from -25o to 140o F (-32o to 60o C). Constant airflow regulators shall be capable of
maintaining constant airflow within +/- 10% of scheduled flow rates (15% for units 50 cfm or
less), within the operating range of 0.2 to 0.8 in. w.g. differential pressure, or 0.6 to 2.4. in.
w.g. on high-pressure models. Sound power levels shall not exceed those for each size and
cfm rating as scheduled. Regulators shall be provided as an assembly consisting of a flame
resistant plastic body with self-inflating silicon element housed within a .75mm galvanized
steel sleeve or flanged plate for mounting in either round or rectangular duct. Each round
sleeve must be fitted with a brush gasket to assure perimeter air tightness with the interior
surface of the duct. All Constant Airflow Regulators will require no maintenance and must be
warranted for a period of no less than five years. Constant Airflow Regulators shall be
installed in tight ducting systems in accordance with all applicable codes and manufacturer’s
instructions.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-10
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2.20
PERFORATED DISTRIBUTION PLATE (WHERE APPLICABLE)
A. Furnish under Section 15725 - Typical Air Handling Units
B. Material: 60 percent free area perforated plate made of 3.5 mm (10 gage) galvanized
steel with round openings equally spaced over entire face area. Maximum air pressure
drop through distribution plate for air volumes scheduled shall be 25 Pa (0.10-inch WG).
Bolt plate to a sturdy steel support frame.
C. Location: Where shown on the drawings.
2.21
AIR OUTLETS AND INLETS
A. Materials:
1. Steel or aluminum except that all units installed in operating rooms shall be
aluminum or stainless steel. Provide manufacturer's standard gasket.
2. Exposed Fastenings: The same material as the respective inlet or outlet.
Fasteners for aluminum may be stainless steel.
3. Contractor shall review all ceiling drawings and details and provide all ceiling
mounted devices with appropriate dimensions and trim for the specific locations.
B. Performance Test Data: In accordance with Air Diffusion Council code 1062R4.
Refer to Section 15071, for NC criteria.
C. Air Supply Outlets:
1. Ceiling Diffusers: Suitable for surface mounting, exposed T-bar or special tile
ceilings, off-white finish, square or round neck connection as shown on the
drawings. Provide plaster frame for units in plaster ceilings.
a. Square, louver, fully adjustable pattern: Round neck, surface mounting
unless shown otherwise on the drawings. Provide equalizing or control
grid and volume control damper.
b. Louver face type: Square or rectangular, removable core for 1, 2, 3, or 4 way
directional pattern. Provide equalizing or control grid and opposed blade
damper.
c. Perforated face type: Manual adjustment for 1, 2, 3, or 4 way horizontal
air distribution pattern without change of air volume or pressure. Provide
equalizing or control grid and opposed blade over overlapping blade damper.
Perforated face diffusers for VAV systems shall have the pattern controller on the
inner face, rather than in the neck and designed to discharge air horizontally at
the ceiling maintaining a constant effect.
d. Slot diffuser/plenum:
1) Galvanized steel boot lined with 13 mm (1/2 inch) thick fiberglass
conforming to NFPA 90A and complying to UL 181 for erosion. Form
slots or use adjustable pattern controllers, to provide stable, horizontal air
flow pattern over
2) Provide inlet connection diameter equal to duct diameter shown on drawings
or provide transition coupling if necessary.
3) Maximum pressure drop at design flow rate: 37 Pa (0.15 inch) wg.
2. Linear Grilles and Diffusers: Extruded aluminum, manufacturer's standard finish,
positive holding concealed fasteners.
a. Margin: Flat, 20 mm (3/4 inch) wide.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-11
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
b. Bars: Minimum 5 mm (3/16 inch) wide by 20 mm (3/4 inch) deep, zero
deflection unless otherwise shown. Reinforce bars on 450 mm (18 inch) center
for sidewall units and on 150 mm (6 inch) center for units installed in floor or
sills.
c. Provide opposed blade damper and equalizing or control grid where shown.
D. Return and Exhaust Registers and Grilles: Provide opposed blade damper without
removable key operator for registers.
1. Finish: Off-white baked enamel for ceiling mounted units. Wall units shall have a
prime coat for field painting, or shall be extruded aluminum with manufacturer's
standard aluminum finish.
2. Standard Type: Fixed horizontal face bars set at 30 to 45 degrees,
approximately 30 mm (1-1/4 inch) margin.
3. Perforated Face Type: To match supply units.
4. Grid Core Type: 13 mm by 13 mm (1/2 inch by 1/2 inch) core with 30 mm (1-1/4
inch) margin.
5. Linear Type: To match supply units.
6. Door Grilles: Are furnished with the doors.
7. Filter Grilles: Standard face hinged to a mounting frame with space for a 25 mm
(one inch) throwaway filter. Hold face closed by a locking screw. Provide retaining
clips to hold filter in place. Provide one inch thick fiberglass throwaway filter.
2.22
WIRE MESH GRILLE
A. Fabricate grille with 2 x 2 mesh 13 mm (1/2 inch) galvanized steel or aluminum
hardware cloth in a spot welded galvanized steel frame with approximately 40 mm (11/2 inch) margin.
B. Use grilles where shown in unfinished areas such as mechanical rooms.
2.23
MISCELLANEOUS DUCT ACCESSORIES
A. General: Fabricate duct accessories from the same material as the ductwork in which the
accessory will be installed, unless specified otherwise.
B. Manual Splitter Dampers: Fabricated from same material as the ductwork two gauges
heavier than duct in which installed with splitters long enough to completely close the
branch duct without flutter. In all cases, blade dimension in direction of airflow shall be
1-1/2 times width of branch duct not less than 12 inches. Provide a locking
quadrant and align its operating handle with the damper blade.
C. Manual Single Blade Volume or Balancing Dampers (2 inches WC Construction):
1. Fabricate in accordance with SMACNA standards, except as detailed on the
Drawings and as specified.
2. Blade and fastener material shall be the same as the ductwork in which the
damper is to be installed. Rod shall be galvanized steel. Blade shall be riveted or
bolted to rod.
3. Dampers shall be of a length suitable to shut off branch ducts without causing
damper flutter.
4. Cross break dampers and stiffen edges with two edge brakes for rigidity.
Provide additional stiffening angles, as required.
5. Provide continuous rods and outside end bearings on all damper assemblies.
Additionally, provide inside end bearings on internally lined ducts. Mark the ends of
damper rods with a saw cut to indicate blade position.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-12
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
6. Maximum single blade balancing damper size shall be 12 by 48 inches. Provide
manual opposed-blade balancing dampers in ducts wider than 12 inches. Section
damper blades over 48 inches wide horizontally.
7. Provide a specified regulator or locking quadrant for adjustment.
D. Manual Opposed-Blade Volume or Balancing Dampers (2 inches WC Construction)
1. Fabricate in accordance with SMACNA standards, except as detailed on the
Drawings and as specified.
2. Blade, rod, linkage, frame, and fastener material shall be the same as the
ductwork in which the damper is to be installed.
3. Blades shall be center crimped for stiffness and to receive pins and rods, and edge
crimped to interlock with adjacent blades on full shutoff. Provide additional
stiffening angles, as required.
4. Provide a prime coated or galvanized channel frame for mounting of
bearings, with angle stops on top and bottom.
5. Provide continuous rods on all drive damper assemblies. Mark the ends of the
damper shaft extension with a saw cut to indicate blade position.
6. Linkage and hardware shall be SMACNA accepted as manufactured by Ventlok,
arranged for gang operation and opposed-blade action without jamming or racking.
7. Bushings for galvanized steel dampers shall be oil impregnated bronze, sized to
match with pins. Bushings for aluminum and stainless steel ductwork shall be nylon
or other suitable thermoset plastic.
8. Blades shall be a minimum of 18-gauge steel or equal strength aluminum.
Maximum blade width shall be 12 inches. Provide multisection dampers for
dampers over 48 inches wide.
9. Provide specified locking quadrants for ductwork serving nonclean areas. Provide
specified dial regulators for ductwork serving cleanrooms.
E. Regulators and Quadrants:
1. Concealed Accessible Insulated Ductwork:
a. Ventlok Figure 635 dial regulator.
b. Ventlok Figure 555 locking quadrant.
2. Concealed Accessible Insulated Ductwork:
a. Ventline Figures 637 or 639 dial regulator to match insulation thickness.
b. Ventline Figure 555 locking quadrant with an elevated standoff of the same
height as the insulation thickness.
3. Concealed Inaccessible Ductwork: Ventlock Figure 677 concealed damper
regulator with plain cover, extended rod, and universal joints and miter gears as
required.
4. Exposed Uninsulated Ductwork in Finished Spaces: Hi-Vel Ventlok Figure 640 dial
regulator with 609 end bearing.
5. Insulated Ductwork Serving Cleanrooms:
a. Ventlok Figure 644 dial regulator with Hi-Vel hardware, and Figure 609 end
bearings.
b. Locking quadrants as specified for noncleanroom areas may be furnished,
providing that the damper hardware is airtight at duct penetrations without
the use of additional sealants.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-13
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
F. Turning Vanes:
1. Description: Hat channel or embossed vane side rails with shop-fabricated doubleblade turning vanes of the same material as the ductwork.
2. Provide factory fabricated, double thickness galvanized sheet metal turning vanes
with air foil contour in all 90º square elbows and elsewhere as indicated on
drawings. Shop fabricated turning vanes shall be submitted for approval prior to
fabrication.
3. Acoustical Turning Vanes: Double thickness galvanized sheet steel or aluminum,
nonreflective air foil contour type vane with perforated surface, a core of sound
absorbent material and nailing.
G. Duct Access Doors:
1. Description:
a. Double wall access door with minimum 1-inch thick insulation between walls,
angle or Z-frame, sealing gasket around the periphery, double layer Plexiglass
vision panel with air space between, hinged with Ventlok No. 100 quick release
latches. Access doors smaller than 12 inches square may be secured with sash
locks.
2. Sizes shall be as follows:
Duct Size
6” through 8”
10”
12” through 16”
Greater than
Frame Size
6x8
10x12
12x16
16x24
No. of Hinge
2
2
2
3
Access Requirements
Hand hole
One hand and sight
Two hands and head sight
Body entry 16”
a. Provide sufficient Ventlok No. 360 sealant for application between the door
frame and duct for installations in ductwork with seal Class A and B, and in
ductwork serving cleanrooms.
b. Patch plates attached with screw fasteners are prohibited, except in locations
where they are specifically noted.
H. Spin-in Fittings – Description: Straight pattern sheet metal spin-in fitting with 45
degree scoop designed for connection to sheet metal ductwork. Assemble using spot
welds or rivets. Button-punch fabrication is prohibited. Provide a specified balancing
damper in the ductwork immediately downstream of each spin-in fitting.
I.
Backdraft Dampers:
1. Description
a. Commercial quality, multiblade, parralel action, counterbalanced backdraft
dampers of 16-gauge galvanized steel, or extruded aluminum, with center
pivoted blades of maximum 6 inches width with felt or flexible vinyl sealed edges,
linked together in rattle-free manner with 90 degree stop, and plated steel
pivot pin. Channel frame.
b. Gravity backdraft dampers smaller than 18 by 18 inches furnished with air
moving equipment, may be the air moving equipment manufacturers standard
construction.
2. Ratings: 3,500 fpm maximum velocity, 1 inch WC backpressure, set to relieve
above 0.02 inch WC differential pressure.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-14
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
J.
Upblast Dampers for Smoke Exhaust:
1. Acceptable Manufacturer: Ruskin
2. Description: Round upblast damper with two-piece design frame shall be 10- gauge
galvanized steel with 1-1/2 inch flange. Blades shall be 20-gauge galvanized steel
with ¾ inch axle and stainless steel bearing sleeve.
3. Damper shall have an 18-gauge galvanized wind screen to shield blades from wind
pressure.
4. Damper shall be Ruskin UBD100.
PART 3 – EXECUTION
3.1
INSTALLATION
A. Comply with provisions of Section 15050, particularly regarding coordination with other
trades and work in existing buildings.
B. Fabricate, install and test ductwork and accessories in accordance with referenced
SMACNA Standards:
1. Drawings show the general layout of ductwork and accessories but do not show
all required fittings and offsets that may be necessary to connect ducts to
equipment, boxes, diffusers, grilles, etc., and to coordinate with other trades.
Fabricate ductwork based on field measurements. Provide all necessary fittings and
offsets at no additional cost to the Owner. Coordinate with other trades for space
available and relative location of HVAC equipment and accessories on ceiling grid.
Duct sizes on the drawings are inside dimensions which shall be altered by
Contractor to other dimensions with the same air handling characteristics where
necessary to avoid interferences and clearance difficulties.
2. Provide duct transitions, offsets and connections to dampers, coils, and other
equipment in accordance with SMACNA Standards, Section II. Provide streamliner,
when an obstruction cannot be avoided and must be taken in by a duct. Repair
galvanized areas with galvanizing repair compound.
3. Provide bolted construction and tie-rod reinforcement in accordance with
SMACNA Standards, Section VI.
4. Construct casings, eliminators, and pipe penetrations in accordance with SMACNA
Standards, Section VI. Design casing access doors to swing against air pressure so
that pressure helps to maintain a tight seal.
C. Install duct hangers and supports in accordance with SMACNA Standards, Section IV.
D. Install fire dampers in accordance with the manufacturer's instructions to conform to the
installation used for the rating test.
E. Seal openings around duct penetrations of floors and fire rated partitions with fire
stop material as required by NFPA 90A.
F. Flexible duct installation: Refer to SMACNA Standards, Section III. Ducts shall be
continuous, single pieces not over 1.5 m (5 feet) long (NFPA 90A), as straight and short
as feasible, adequately supported. Centerline radius of bends shall be not less than two
duct diameters. Make connections with clamps as recommended by SMACNA. Clamp per
SMACNA S3.33 and S3.34 with one clamp on the core duct and one on the insulation
jacket. Flexible ducts shall not penetrate floors, or any chase or partition designated
as a fire or smoke barrier, including corridor partitions fire rated one hour or two hour.
Support ducts SMACNA Standards.
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-15
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
G. Where diffusers, registers and grilles cannot be installed to avoid seeing inside the
duct, paint the inside of the duct with flat black paint to reduce visibility.
H. Control Damper Installation:
1. Provide necessary blank-off plates required to install dampers that are smaller than
duct size. Provide necessary transitions required to install dampers larger than duct
size.
2. Assemble multiple sections dampers with required interconnecting linkage and
extend required number of shafts through duct for external mounting of damper
motors.
3. Provide necessary sheet metal baffle plates to eliminate stratification and provide
air volumes specified. Locate baffles by experimentation, and affix and seal
permanently in place, only after stratification problem has been eliminated.
4. Install all damper control/adjustment devices on stand-offs to allow complete
coverage of insulation.
I.
Air Flow Measuring Devices (AFMD): Install units with minimum straight run distances,
upstream and downstream as recommended by the manufacturer.
J.
Low Pressure Duct Liner: Install in accordance with SMACNA, Duct Liner Application
Standard.
K. Protection and Cleaning: Adequately protect equipment and materials against physical
damage. Place equipment in first class operating condition, or return to source of
supply for repair or replacement, as determined by Consultant. Protect equipment and
ducts during construction against entry of foreign matter to the inside and clean both
inside and outside before operation and painting. When new ducts are connected to
existing ductwork, clean both new and existing ductwork by mopping and vacuum
cleaning inside and outside before operation.
3.2
DUCT LEAKAGE TESTS AND REPAIR
A. Perform tests AS required. See article, QUALITY ASSURANCE.
B. Seal all openings in ducts.
END OF SECTION 15815
SECTION 15815 METAL DUCTS AND ACCESSORIES
ME-007-16
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15840
AIR TERMINAL UNITS
PART 1 - GENERAL
1.1
DESCRIPTION
Air terminal units, air flow control valves, and fan-coil units.
1.2
1.3
RELATED WORK
A. Section 15010
-
Mechanical General Provisions.
B. Section 15050
-
Basic Mechanical Materials and Methods: General mechanical
requirements and items, which are common to more than
one section of Division 15.
C. Section 15071
-
Mechanical Vibration and Seismic Control: Noise
requirements.
D. Section 15840
-
Air Terminal Units.
E. Section 15900
-
HVAC Instrumentation and Controls
F. Section 15950
-
Testing, Adjusting, and Balancing: Flow rates adjusting and
balancing
QUALITY ASSURANCE
Refer to Paragraph, QUALITY ASSURANCE, in Section 15010.
1.4
SUBMITTALS
A. Submit in accordance with Section 15010.
B. Manufacturer's Literature and Data:
1. Air Terminal Units: Submit test data.
2. Air flow control valves.
3. Fan Coil units.
C. Samples: Provide one typical air terminal unit for approval by the Consultant. This unit
will be returned to the Contractor after all similar units have been shipped and deemed
acceptable at the job site.
D. Certificates:
1. Compliance with paragraph, QUALITY ASSURANCE.
2. Compliance with specified standards.
E. Operation and Maintenance Manuals:
INSTRUCTIONS, in Section 01010.
1.5
Submit
in
accordance
with
paragraph,
APPLICABLE PUBLICATIONS
The publications listed below form a part of this specification to the extent referenced. The
publications are referenced in the text by the basic designation only.
SECTION 15840 AIR TERMINAL UNITS
ME-008-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
A. Air Conditioning and Refrigeration Institute:
440R
880
-
Room Fan Coils
Air Terminals
B. National Fire Protection Association (NFPA):
90A
-
Standard for the Installation of Air Conditioning and Ventilating
Systems
C. Underwriters Laboratories, Inc. (UL):
181
883
1.6
-
Factory-Made Air Ducts and Connectors
Fan Coil Units and Room-Fan Heater Units
GUARANTY
In accordance with Section 01001.
PART 2 – PRODUCTS (WHERE APPLICABLE)
2.1
AIR TERMINAL UNITS (BOXES)
A. General: Factory built, pressure independent units, factory set-field adjustable volume,
suitable for single or dual duct applications, as indicated. Clearly show on each unit the
unit number and factory set air volumes corresponding to the contract drawings. Section
15950. Testing, adjusting and balancing work assume factory set air volumes. Coordinate
flow controller sequence and damper operation details with the drawings and Section
15900.
B. Rating and Performance Certification: ARI Industry Standard 880.
1. Maximum pressure drop: As shown on the drawings.
2. Maximum room sound levels: Not to exceed criteria stated in Section 15071. (Lowpressure duct is usually unlined. The inlet pressure should not be less than 374 Pa
(1-1/2 inches water gage), unless shown otherwise on drawings. Provide terminal
sound attenuators where necessary to comply with the noise criteria. Sound tests
and correction of deficiencies is specified in Section 15950.
C. Casing: Unit casing shall be constructed of galvanized steel not lighter than 0.85 mm (22
gage) or aluminum sheet not lighter than 1.3 mm (18 gage). Casing of units serving
surgery area (where applicable) shall be of aluminum. Provide hanger brackets for
attachment of supports.
1. Lining material: Suitable to provide required acoustic performance, thermal insulation
and prevent sweating. Meet the requirements of NFPA 90A and comply with UL 181
for erosion, 13 mm (one-half inch) minimum thickness, secured to supporting
surfaces in such a manner that it will not sag, delaminate, or settle. Comply
with UL Standard l8l for erosion. Surfaces, including all edges, shall be faced with
perforated metal or coated so that the air stream will not detach material. No lining
material is permitted in the boxes serving surgery areas.
2. Access panels (or doors): Provide panels large enough for inspection, adjustment and
maintenance without disconnecting ducts, and for cleaning heating coils attached to
unit, even if there are no moving parts. Panels shall be flushed, gasketed airtight,
and shall require no tool other than a screwdriver to remove. Access panels on low-
SECTION 15840 AIR TERMINAL UNITS
ME-008-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
pressure side, i.e., downstream of volume damper, do not require gasket if tightly
fitted.
3. Total leakage from casing: Not to exceed 2 percent of the nominal capacity of the
unit when subjected to a static pressure of 747 pa (3 inch water gage), with all
outlets sealed shut and inlets fully open.
4. Octopus connector: Factory installed, lined air distribution terminal. Provide where
flexible duct connections to terminals are shown on the drawings. Provide butterflybalancing damper, with locking means, in connectors with more than one outlet. No
lining material is permitted in the boxes serving surgery areas.
D. Construct dampers and other internal devices of corrosion resisting materials which do
not require lubrication or other periodic maintenance. The dampers and other internal or
external devices for boxes serving surgery area shall be of stainless steel or
aluminum.
E. Single Duct Terminals: Provide manufacturer's standard catalogue.
1. Constant volume single duct. The unit shall contain within the casing, a mechanical
constant volume regulator. Volume regulator shall control air delivery to within plus
or minus 5 percent of specified air flow subjected to inlet pressure up to 1500 pa (6
inches water gage). Controls will be designed to provide required sequence of
operation.
F. Terminal Sound Attenuators: Construction shall be similar to sound attenuators in Section
15840.
2.2
AIR FLOW CONTROL VALVE (AFCV) {WHERE APPLICABLE}
A. Units shall be normally closed, constant volume, DDC control type with attenuators
and/or lined duct required to meet room NC criteria. Air terminal units (boxes) may be
used for this service.
2.3
ROOM FAN COIL UNITS
A. Capacity Certification: ARI 440.
B. Safety Compliance: NEC and UL 883.
C. Noise Levels: Operating at full cooling capacity, sound power level shall not exceed by
more than 5 dB the numerical value of sound pressure levels associated with noise
criteria specified in Section 15071. Select units at intermediate speed, for compliance
with the noise criteria.
D. Chassis: Galvanized steel, acoustically and thermally insulated to attenuate noise and
prevent condensation.
E. Cabinet Type: Not lighter than 1.3 mm (l8 gage) steel, reinforced and braced. Arrange
components and provide adequate space for installation of piping package and control
valves. Finish shall be factory-baked enamel in manufacturer’s standard color as selected
by the architect. Provide synthetic rubber or polyurethane gasket for air-tight installation
to the wall for outside air to vertical units and return air to horizontal units.
1. Vertical Unit: Provide 1.6 mm (l6 gage) steel front panel with 13 mm (l/2inch) thick fiberglass insulation and provide screw-type levelers.
a. Air outlet grilles: Adjustable four-way air deflection located in the top panel.
SECTION 15840 AIR TERMINAL UNITS
ME-008-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
b. Provide two hinged access doors (one each side) equipped with key operated
cam-lock fasteners in the unit top panel located to provide access to the unit
controls.
2. Horizontal Unit: Hinged bottom access panel with cam-lock fasteners. Provide
stamped integral discharged grilles in front of cabinet.
F. Concealed Units: Enclosed type with inlet and outlet duct collars.
G. Fans: Centrifugal, direct drive, galvanized steel or polyester resin.
1. Motors: 3-speed permanent split capacitor type with integral thermal overload
protection, for operation at not more than l200 RPM.
2. Provide a fan speed selector switch, with off position, mounted in a junction box in
the cabinet of each unit. Switch shall have a set of auxiliary contacts which are open
when the switch is in the "off" position and closed when the switch in either of the
other positions.
H. Cooling and Electric Heating Coils (where applicable):
1. Cooling Coils: Copper tubes, 10 mm (three-eighths inch) minimum inside diameter,
not less than 4.3 mm (0.0l7 inch) thick with copper of aluminum fins. Coils shall be
pressure tested for bursting and strength in accordance with Underwriters
Laboratories, Inc., requirements for pressure tested coils, and shall be designed to
provide adequate heat transfer capacity. Provide manual air vent at high point of coil.
2. Electrical heating coils: Spiral sheath or finned-tube construction with Cal-rod
resistance elements in aluminum tubes. Units shall be UL listed and factory wired
with unit mounted heat switch, magnetic contactors, high temperature cutout safety
control, and fan override thermostat.
I.
Piping Package: Furnished with unit by the manufacturer to fit control valves provided by
the controls supplier. Submit manufacturer's detailed drawings of the piping in the end
compartments, for approval, prior to fabrication of the piping packages. Provide gate
valves on the supply and return pipes and balancing fittings on the return pipes.
J.
Drain Pan: Galvanized steel or carbon steel bonderized and finished with not less than
two coats of baked enamel or equally durable finish, and of strength to requirement of
function it performs in unit. Inside or outside surfaces of drain pan shall be coated with
mastic type insulation or closed cell polyurethane. Provide a similar secondary drain pan,
which may be steel or PVC, provided with a drain connection to catch condensation from
all piping, coils and primary drain pan.
K. Air Filter: Manufacturer's standard throwaway type for AHUs and electronic type air filters
for FCUs, not less than one inch thick, supported to be concealed from sight and be tight
fitting to prevent air by-pass. Filters shall have slide out frames and be easily replaced
without removing enclosure or any part thereof.
L.
Control valves and unit mounted return air thermostats are to be field installed.
PART 3 – EXECUTION
3.1
INSTALLATION
A. Work shall be installed as shown and according to the manufacturer’s diagrams and
recommendations.
SECTION 15840 AIR TERMINAL UNITS
ME-008-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
B. Handle and install units in accordance with manufacturer's written instructions.
C. Support units rigidly so they remain stationary at all times. Cross-bracing or other means
of stiffening shall be provided as necessary. Method of support shall be such that
distortion and malfunction of units cannot occur.
D. Locate air terminal units to provide a straight section of inlet duct for proper
functioning of volume controls.
3.2
OPERATIONAL TEST
Refer to Section 15050.
END OF SECTION 15840
SECTION 15840 AIR TERMINAL UNITS
ME-008-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15861
AIR FILTERS
PART 1 – GENERAL
1.1
DESCRIPTION
A. Air filters for heating, ventilating and air conditioning.
B. Definitions: Refer to ASHRAE 52.1 for definitions of face velocity, net effective filtering
area, media velocity, resistance (pressure drop), atmospheric dust spot efficiency and
dust-holding capacity.
1.2
RELATED WORK
A. Section 15050 -Basic Mechanical Materials and Methods.
B. Section 15725 - Air Handling Units.
1.3
QUALITY ASSURANCE
A. Air Filter Performance Report For Extended Surface Filters:
1. Submit a test report for each Grade of filter being offered. The report shall be less
than five years old and will have been prepared by an independent testing laboratory
using test equipment, method and duct section as specified by ASHRAE Standard
52.1 for type filter under test and acceptable to Consultant, indicating that
filters comply with the requirements of this specification. Test for 150 m/min (500
fpm) will be accepted for lower velocity rated filters provided the test report of an
independent testing laboratory complies with all the requirements of this
specification.
2. Selection procedures: All filters tested shall have been procured by the independent
testing laboratory from the open market independent of manufacturer of these filters
and a statement to this effect must accompany test report.
3. Owner’s Option: The Owner at its option may take one of the filters for each different
type submitted and run an independent test to determine if the filter meets the
requirements of this specification. When the filter meets the requirements, the Owner
will pay for the test. When the filter does not meet the specification requirements,
the manufacturer will be required to pay for the test and replace the filters with
filters that will perform as required by the specifications.
B. Filter Supplier Warranty for Extended Surface Filters: Guarantee the filters against leak,
blow-outs, and other deficiencies during their normal useful life. Defective filters shall be
replaced at no cost to the Owner.
C. Nameplates: Each filter shall bear a label or name plate indicating manufacturer's name,
filter size, rated efficiency, UL classification, and file number.
1.4
SUBMITTALS
A. Submit in accordance with Section 15010.
B. Manufacturer's Literature and Data:
1. Extended surface filters.
2. Holding frames. Identify locations.
3. Side access housings. Identify locations, verify insulated doors.
SECTION 15861 AIR FILTERS
ME-009-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
4. HEPA filters.
5. Magnehelic gages.
C. Air filter performance reports.
D. Suppliers warranty.
1.5
APPLICABLE PUBLICATIONS
The publications listed below form a part of this specification to the extent referenced. The
publications are referenced in the text by basic designation only.
A. American Society of
(ASHRAE):
52.1
-
Heating,
Refrigerating and
Air-conditioning Engineers,
Inc.
Methods of Testing Air Cleaning Devices Used in General Ventilation
For Removing Particulate Matter
B. American national Standards Institute (ANSI):
ANSI N45.2 -
Quality Assurance Requirements for Nuclear Power Plants
C. Underwriters Laboratories, Inc. (UL):
900
-
UL Standard for Safety Test Performance of Air Filter Units
PART 2 – PRODUCTS
2.1
REPLACEMENT FILTER ELEMENTS TO BE FURNISHED
A. To allow temporary use of HVAC systems for testing and in accordance with
Paragraph, TEMPORARY USE OF MECHANICAL AND ELECTRICAL SYSTEMS in
Section 15010, provide one complete set of additional (replacement) filter elements.
B. The Consultant will direct whether these additional filters will either be installed as
replacements for dirty units or turned over to the Owner for future use as
replacements.
2.2
EXTENDED SURFACE AIR FILTERS
A. Use factory assembled electronic type air filters of the extended surface type with
supported or non-supported cartridges for removal of particulate matter in air
conditioning, heating and ventilating systems. Filter units shall be of the extended surface
type fabricated for disposal when the dust-load limit is reached as indicated by maximum
(final) pressure drop.
B. Filter Classification: UL approved Class 1 or Class 2 conforming to UL Standard 900.
C. Filter Grades, Percent, Nominal Efficiency and Application:
1.
2.
3.
4.
Grade
Grade
Grade
Grade
A: 90-95 after-filter.
B: 80-85 after-filter.
C: 50-60 pre-filter.
D: 25-30 pre-filter.
SECTION 15861 AIR FILTERS
ME-009-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. Filter Media:
1. Grade A, B and C Non-supported (Bag) Type: Construct media of high density glass
fibers or other suitable fibers. Enclose or pocket each pleat in woven or non-woven
backing material. Seal and fasten (stitch) to maintain pleat shape in a proper frame
to insure no air leakage for life of filter. Staples and stays are prohibited.
2. Grade A, B and C Supported (Rigid Pleated) Type: Media shall be composed of high
density glass fibers or other suitable fibers. Fastening methods used to maintain pleat
shape, (metal backing or aluminum separators) shall be sealed in a proper enclosing
frame to insure no air leakage for life of filter. Staples and stays are prohibited.
3. Grade D (Pleated) Type: Media shall be composed of synthetic/natural fibers. A metal
grid backing shall be bonded to the air leaving side of the media to maintain uniform
pleat shape and stability for proper air flow and maximum dust loading. The media
frame shall be constructed of high strength moisture resistant fiber or beverage
board. Bond the pleated media pack on all four edges to insure no air leakage for the
life of the filter. Staples and stays are prohibited.
E. Filter Efficiency and Arrestance: Efficiency and arrestance of filters shall be determined in
accordance with ASHRAE 52.1-92. Atmospheric dust spot efficiency and synthetic dust
weight arrestance shall not be less than the following:
Grade
Grade
Grade
Grade
A
B
C
D
Percentage of Initial
Efficiency
75.4
58.0
25.0
Less than 20.0
Percentage of Average
Efficiency
86.4
79.0
53.0
22.0
Percentage of
Average Arrestance
99.0
98.0
97.0
89.0
F. Maximum initial and final resistance, Pa (inches of water), for each filter cartridge when
operated at 150 m/min (500 feet per minute) face velocity:
Grade
Grade
Grade
Grade
Grade
Grade
Grade
Grade
A (Bag)
A (Rigid Pleated)
B (Bag)
B (Rigid Pleated)
C (Bag)
C (Rigid Pleated)
D (2-inch deep)
D (4-inch deep)
Initial Resistance
130 (0.52)
185 (0.74)
100 (0.40)
150 (0.60)
70 (0.28)
85 (0.35)
80 (0.32)
65 (0.27)
Final Resistance
250 (1.00)
250 (l.00)
250 (l.00)
250 (l.00)
200 (0.80)
200 (0.80)
175 (0.70)
175 (0.70)
G. Dust Holding Capacity: When tested to 250 Pa (l.00-inch water) at 150 m/min (500 fpm)
face velocity, the dust holding capacity for each 600 mm by 600 mm (24 inches by 24
inches) (face area) filter shall be at least the values listed below. For other filter sizes the
dust holding capacity shall be proportionally higher or lower to the face area.
Grade
Grade
Grade
Grade
Grade
Grade
Grade
Grade
A (Bag)
A (Rigid Pleated)
B (Bag)
B (Rigid Pleated)
C (Bag)
C (Rigid Pleated)
D (2 inch deep)
D (4 inch deep)
SECTION 15861 AIR FILTERS
300 grams
90 grams
430 grams
175 grams
910 grams
250 grams
150 grams
300 grams
ME-009-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
H. Minimum Media Area: The minimum net effective media area in square meter (square
feet) for each 600 mm by 600 mm (24 inches by 24 inches) (face area) filter at 150
m/min (500 fpm) face velocity shall be at least the values listed below. For other filter
sizes the net effective media area shall be proportionally higher or lower.
Grade
Grade
Grade
Grade
Grade
Grade
Grade
Grade
I.
A (Bag)
A (Rigid Pleated)
B (Bag)
B (Rigid Pleated)
C (Bag)
C (Rigid Pleated)
D (2-inch deep)
D (4-inch deep)
8.5
5.3
8.5
5.3
8.5
5.3
1.4
2.1
(9l.0)
(57.0)
(9l.0)
(57.0)
(9l.0)
(57.0)
(l4.8)
(23.0)
Side Servicing Housings (Where Applicable):
1. Minimum 1.6 mm (l6 gage galvanized steel, or aluminum, completely factory
assembled with upstream and downstream flanges for connection into the duct
system. Furnish housing length sufficient to provide for fully extended operating filter
elements.
2. Access doors: Double skin insulated, at each end of the housing with
continuous gasketing on the perimeter and positive locking devices. Design doors to
withstand a minimum positive/negative 1.0 kPa (four inches of water) static pressure.
3. Filter slide channels: Channels shall incorporate a positive-sealing gasket material to
seal the top and bottom of the filter cartridge frames to prevent bypass. Provide
factory installed gasketing to prevent leakage between cartridges, and between
cartridges and doors.
J.
Holding Frame System (Where Applicable):
1. Minimum 1.6 mm (l6 gage) galvanized steel, 100 mm (4 inches) deep, factory
complete with hardware necessary for field assembly, suitable for either upstream or
downstream filter servicing. All members shall be cut to size and prepunched for easy
assembly into modules of the size and capacity noted in the schedules.
2. The framing members shall be permanently gasketed to prevent the bypass of
unfiltered air. If required, furnish suitable vertical support members to prevent
deflection of horizontal members. The vertical support members shall not interfere
with either the installation or operation of the filters.
3. The framing system shall incorporate a factory installed positive sealing device for
each row of filters. This device shall allow for easy installation and removal of
cartridges and shall insure the seal between the gasketed filter elements while the
building is in operation.
K. Magnehelic Differential Pressure Filter Gages: Nominal 100 mm (four inch) diameter, zero
to 500 Pa (zero to two inch water gage) range, flush mounted in aluminum panel board,
complete with static tips, copper or aluminum tubing, and accessory items to provide
zero adjustment. Provide one gage for each extended surface filter section. Provide
Petcocks for each gauge.
L.
Equipment Identification: Section 15050.
SECTION 15861 AIR FILTERS
ME-009-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
PART 3 – EXECUTION
3.1
INSTALLATION
Install supports, filters and gages in accordance with manufacturer's instructions.
3.2
START-UP AND TEMPORARY USE
A. Clean and vacuum air handling units and plenums to the satisfaction of the Consultant
prior to starting air handling systems.
B.
Install or deliver replacement filter units as directed by the Consultant.
END OF SECTION 15861
SECTION 15861 AIR FILTERS
ME-009-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15900
HVAC INSTRUMENTATION AND CONTROLS
PART 1 – GENERAL
1.1
WORK INCLUDED
A. Comply with Division 1, General Requirements and all documents referred to therein.
B. Provide all labour, materials, products, equipment and services to supply, install, wire,
calibrate and commission the electronic control and monitoring system instrumentation as
specified in the point schedules, in this Specification and as required to make a complete
and functional system.
C. Coordinate instrumentation provisions with Division 16, Section 16965 Building
Management System (Controller & Software).
1.2
QUALITY ASSURANCE
A. Instrumentation work shall be performed by one firm specializing in the installation of
control systems for building facilities control.
B. Products referenced under this Section establish the minimum acceptable standards of
product quality, features and performance. Products provided under this Section shall be
coordinated with the supplier of the BMS system.
1.3
RELATED WORK
A. Where the application of any special software package requires additional
instrumentation to meet the requirements specified, provide the necessary
instrumentation at no additional cost whether or not such instrumentation is identified.
B. Any required additional instrumentation shall meet the requirements of this Section.
Submit details for review prior to installation.
C. Provide actuators and terminal unit controller for all VAV, constant volume controllers,
fan coil units and other terminal devices. Where possible, have actuators and controls
installed in the terminal unit manufacturer’s factory.
1.4
SENSORS
1.4.1 Electronic Sensors: Provide all remote sensors as required for the systems. All
sensors shall be vibration and corrosion resistant for wall, immersion, and/or duct mounting.
a. Temperature Sensors: Thermistor type for terminal units and Resistance
Temperature Device (RTD) with an integral transmitter for all other sensors.
1. Duct sensors shall be rigid or averaging type as shown on drawings.
Averaging sensor shall be a minimum of 1 linear ft of sensing element for
each sq. ft. of cooling coil face area.
2. Immersion sensors shall be provided with a separable well made of stainless
steel or bronze or monel materials. Pressure rating of well is to be consistent
with the system pressure in which it is to be installed.
3. Space sensors shall be equipped with set-point adjustment, override switch,
display, and/or communication port as shown on the drawings. Match room
thermostats, locking cover.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
4. Outdoor air temperature sensors shall have watertight inlet fittings and
shielded from direct sunlight.
5. Room security sensors shall have stainless steel cover plate with insulated
back and security screws.
6. Wire: Twisted, shielded-pair cable.
7. Output Signal: 4-20 ma.
b. Humidity Sensors: Bulk polymer sensing element type.
1. Duct and room sensors shall be a sensing range of 20 to 80 percent with
accuracy of + 2 to + 5 percent RH, including hysteresis, linearity, and
repeatability.
2. Duct and outdoor humidity sensors shall be furnished with element guard
and mounting plate and have a sensing range of 0 to 100 percent RH.
3. 4-20 ma continuous output signal.
c.
Static Pressure Sensors: Non-directional, temperature compensated.
1. 4-20 ma output signal.
2. 0 to5 inches wg for duct static pressure range.
3. 0 to 0.25 inch wg for Building static pressure range.
1.4.2
Water Flow Sensors: (WHERE APPLICABLE)
a. Sensor shall be insertion turbine type with turbine element, retractor and
preamplifier/transmitter mounted on a two-inch full port isolation valve;
assembly easily removed or installed as a single unit under line pressure through
the isolation valve without interference with process flow; calibrated scale shall
allow precise positioning of the flow element to the required insertion depth
within plus or minus 1 mm (0.05 inch); wetted parts shall be constructed of
stainless steel. Operating power shall be nominal 24 VDC. Local instantaneous
flow indicator shall be LED type in NEMA 4 enclosure with 3-1/2 digit display, for
wall or panel mounting.
b. Performance characteristics:
1. Ambient conditions: - 40 to 60 degrees C (-40 to 140 degrees F, 5 to 100
percent humidity.
2. Operating conditions: 850 kPa (125 psig), 0 to 120 degrees C (30 to 250
degrees F), 0.15 to 12m per second (0.5 to 40 feet per second) velocity.
3. Nominal range (turn down ratio) L 10 to 1.
4. Overall accuracy plus or minus one percent of reading.
5. Repeatability: plus or minus 0.25 percent of reading.
6. Preamplifier mounted on meter shall provide a 4-20 ma divided pulse output
or switch closure signal for units of volume or mass per a time base. Signal
transmission distance shall be a minimum of 1,800 meters (6,000 feet).
Preamplifier for bi-directional contact closure from a relay mounted in the
preamplifier.
7. Pressure Loss: Maximum 1 percent of the line pressure in line sizes above
100 mm (4 inches).
8. Ambient temperature effects, less than 0.005 percent calibrated span per
degree C (degree F) temperature change.
9. RFI effect – flow meter shall not be affected by RFI.
10. Power supply effect less than 0.02 percent of span for a variation of plus or
minus 10 percent power supply.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
1.4.3
Flow switches shall be either paddle or differential pressure type. (WHERE
APPLICABLE)
a. Paddle-type switches (liquid service only) shall be UL listed, SPDT snap- acting.
Adjustable sensitivity with NEMA 4 enclosure.
b. Differential pressure type switches (air or water service) shall be UL listed, SPDT
snap acting, NEMA 4 enclosure, with scale range and differential suitable for
specified application.
1.4.4
Current Switches: Current operated switches shall be self-powered, solid state with
adjustable trip current as well as status, power, and relay command status LED
indication. The switches shall be selected to match the current of the application and
output requirements of the DDC systems.
1.4.5
Pressure to Current Transmitters: (WHERE APPLICABLE)
A. Provide pressure to current transmitters, Instrument Code C1 having the
following minimum specifications:
1. Internal materials of the transducer suitable for continuous contact with the
applicable media.
2. Output signal of 4-20 mA.
3. Output variation of less than 0.2% full scale for supply voltage
variations of 10%.
4. Combined non-linearity, repeatability and hysteresis effects not to exceed
0.5% of full scale output over entire range.
5. Integral, accessible zero and span adjustments.
6. Operating temperature range of -10 to 50 deg C with 5% to 90% RH noncondensing.
7. Temperature effect of 1.5% full scale 50 deg C or less.
8. Over pressure input protection to a minimum of twice maximum working
input pressure.
9. Output short circuit and open circuit protection.
10. Dustproof housing.
11. Shock and vibration protection.
1.4.6
Pressure Electric Switches
A. Provide SPDT snap acting switch rated for 8 amperes at 220V.
B. The pressure range shall be 0 to 130 kPa.
C. Provide adjustable setpoint from 20.6 to 130 kPa and the differential
adjustable between 12.7 and 41.1 kPa.
1.4.7
Motor Control Relays
A. Provide motor start/stop control relays in dustproof housing.
B. Provide pick up rating and time and hold rating as required for individual
applications.
C. Provide motor control relays from one manufacturer.
D. Provide input operating voltage to be compatible with the BMS digital output
(246 DC) equipment.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
E. Where hand/off/auto (HOA) switches are provided on the MCC, the BMS digital
output shall control the motor only in the auto position.
F. Do not override other interlocks providing safety control.
G. Provide shock and vibration protection.
H. Provide required wiring interconnections between the motor control relays and
the motor starters.
1.4.8
Current Transformers and Relays
A. Provide current transformers and relays, to indicate motor status.
B. Provide SPDT output relay suitable for sensing by the BMS digital input
subsystem.
C. Provide output relay with trip adjustment, field accessible, over 0-100% of range.
Deadband adjustment shall be to, at maximum, 10% of range.
D. Long term setting drift of current transformer and relay combination not to
exceed 5% full range/6 months.
E. Provide current transformer and relay with over current and over voltage
protection.
F.
1.4.9
Operating ambient temperature range of -10 deg C to plus 50 deg C with 5%to
90% RH non-condensing.
Motor Status Contacts
A. Provide status inputs, for all motors using auxiliary contacts from motor starters
where available or from auxiliary relays wired into the motor starter circuit.
1.4.10 Differential Pressure Switches (WHERE APPLICABLE)
A. Select the differential pressure range of the switch to suit the application.
B. Provide switch with adjustable set point.
C. Provide switch with SPDT contacts rated at 5 amperes at 220V AC.
D. Mount the switch with diaphragm in a vertical plane.
E. Indicate flow for pumps and fans by means of a current sensitive relay which
opens an electrical contact as differential pressure falls below pre-adjusted
pressure range setting.
1.4.11 Damper Status Switch
A. Provide magnetic reed switch type damper status switches activated by damper
blade. Mount securely on damper frames.
B. Provide SPDT switches with contact rating of not less than 5 amperes at 220V
AC.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
1.4.12 Filter Gauges
A. Filter gauges are provided by Division 15, Air Filters.
1.4.13 Level Switches
A. Float type, tank mounted SPDT switch action, suitable for water up to 100 deg C.
B. Float type, pit mounted SPDT switch action, suitable for water up to 100 deg C.
1.4.14 Level Sensor
A. Capacitive level sensor, equal to Magnatrol, complete with sensor rods, water
tight enclosure, continuous 2-10V or 4-20 mA output.
1.4.15 Gas Detectors
A. Provide detectors suitable for carbon monoxide, carbon dioxide, refrigerant and
ammonia detection. Instrument Code K6.
B. Provide electronic detectors, with scale range and set points suitable for the gas
being detected and in compliance with legislation for hazardous gasses.
C. Provide digital or continuous 2-10 VDC or 4-20mA input to BMS as
appropriate for detection and control.
D. Carbon Monoxide Detectors: Single or multichannel, dual-level detectors using
solid-state plug-in sensors with a 3-year minimum life; suitable over a
temperature range of 0 to 40 degree C (32 to 104 degree F); with 2 factorycalibrated alarm levels at 50 and 100 ppm.
E. Carbon Dioxide Sensor and Transmitter:
Single detectors using solid-state
infrared sensors; suitable over a temperature range of minus 5 to 55 degree C
(23 to 130 degree F) and calibrated for 0 to 2 percent, with continuous or
averaged reading; for wall mounting and duct mounting. Provide one (1) sensor
suitable for outdoor installation located near the fresh air intake of the FAHU to
measure the outdoor air carbon dioxide level. The measured value here will
serve as the base level for comparison with the space carbon dioxide level.
Provide and locate the other Carbon Dioxide sensors as indicated in the
Drawings.
1.4.16 High Level Interface
All independent control/monitoring system for chiller plant, VFD, and other
equipment with electronic interface panels/system shall have Lon Works Protocol
Communications or BACnet capability.
1.4.17 Interface Contacts
A. Snap acting switch, rated for 5 amps at 220 VAC, or digital input.
B. Ensure contacts and signals are compatible with BMS and other systems being
interfaced.
C. Provide 2-10 VDC or 4-20 mA output from BMS to air flow volume control
devices.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-5
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
D. Provide pulse totalizing and conversion from building power meters.
1. Power meter consists of CT’s and PT’s. Provide accuracy equal to that of the
utility meter.
2. Provide time based measurement with intervals of, at minimum 1 minute, for
power demand control.
1.5
THERMOSTATS AND HUMIDISTATS
A. Room thermostats controlling heating and cooling devices shall have three modes of
operation (heating – null or dead band – cooling). Wall-mounted thermostats shall have
setpoint and temperature display, and external adjustment:
1. Pneumatic thermostats shall be 2-pipe, non-bleed or relay type design fully
proportional with adjustable throttling range, direct or reverse acting as required.
Factory calibrated at 17.2 kPa per degree C (2.5 psig per degree F0 setpoint dial
stops, adjustable sensitivity setting of 7 to 30 kPa per degree C (1 to 4 psig per
degree F), and a test port to measure the output to controlled devices. Range as
required.
2. Electronic Thermostats: Soild-state, microprocessor based, programmable to daily,
weekend, and holiday schedules. Battery replacement without program loss.
B. Strap-on thermostat shall be enclosed in a dirt-and-moisture proof housing with fixed
temperature switching point and single pole, double throw switch.
C. Freezestat shall have a minimum of 300 mm (one linear foot) of sensing element for each
0.093 square meter (one square foot) of coil area. A freezing condition at any increment
of 300 mm (one foot) anywhere along the sensing element shall be sufficient to
operate the thermostatic element.
D. Room Humidistats: Provide fully proportioning humidistats with adjustable throttling
range for accuracy of settings and conservation. The humidistats shall have set point
scales shown in percent of relative humidity located on the instrument. Systems showing
moist/dry or high/low are not acceptable.
1.6
FINAL CONTROL ELEMENTS AND OPERATORS
A. Fail Safe Operation: Control valve and dampers shall provide “fail safe” operation in
either the normally open or normally closed position as required for freeze, moisture,
smoke or fire protection.
B. Spring Ranges: Range as required for system sequencing and to provide tight shut-off.
C. Power Operated Control Dampers (other than VAV Boxes): Factory fabricated, balanced
type dampers. All modulating dampers shall be opposed blade type. Blades for twoposition, duct-mounted dampers shall be parallel, airfoil (streamlined) type for minimum
noise generation and pressure drop.
1. Leakage: Maximum leakage in closed position shall not exceed 7 L/S (15 CFMs)
differential pressure for outside air and exhaust dampers and 200 L/S. 1 square
meter (40 CFM/sq.ft.) at 50 mm (2 inches) differential pressure for other dampers.
2. Frame shall be galvanized steel channel with seals as required to meet leakage
criteria.
3. Blades shall be galvanized steel or aluminum, 200mm (8 inch) maximum width, with
edges sealed as required.
4. Bearing shall be nylon, bronze sleeve or ball type.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-6
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
5. Hardware shall be zinc-plated steel. Connected rods and linkage shall be non- slip.
Working parts of joints shall be brass, bronze, nylon or stainless steel.
D. Smoke Dampers and Combination Fire/Smoke Dampers: These dampers shall be
classified as a Class II/III leakage rated damper for use in smoke control systems under
the latest version of UL 555S, and shall bear a UL Label attesting to same. Smoke
dampers shall be suitable for 120 degrees c (250 degrees F).
E. Operators shall be electric or pneumatic type operating at 140 kPa (20 psig) as required
for proper operation.
1. Dampers that require manual reset or link replacement after actuation shall not be
acceptable. See drawings for required control operation.
2. Metal parts shall be aluminum, mill finish galvanized steel, or zinc plated steel or
stainless steel.
3. Maximum air velocity and pressure drop through free area the dampers:
a. Smoke damper in air handling unit; 210 meter per minute (700 fpm).
b. Duct mounted damper; 600 meter per minute (2000 fpm).
F. Control Valves: (WHERE APPLICABLE)
1. Valves shall be rated for a minimum of 150 percent of system operating pressure at
the valve location but not less than 900 kPa (125 psi).
2. Valves 50 mm (2inches) and smaller shall be bronze body with threaded or flare
connections.
3. Valves 60 mm (2 ½ inches) and larger shall be bronze or iron body with flanged
connections.
4. Brass or bronze seats except for valves controlling media above 100 degrees C (210
degrees F), which shall have stainless steel seats.
5. Flow characteristics:
a. Three way valves shall have a linear relation or equal percentage relation of flow
versus value position.
b. Two-way valves position versus flow relation shall be linear for steam and equal
percentage for water flow control.
6. Maximum pressure drop:
a. Two position steam control, 20 percent of inlet gauge pressure.
b. Modulating Steam Control, 80 percent of inlet gauge pressure (acoustic velocity
limitation).
c. Modulating water flow control, greater of 3 meters (10 feet) of water or the
pressure drop through the apparatus.
d. Two position water valves shall be line size.
G. Dampers and Valve Operators and Relays: (WHERE APPLICABLE)
1. Pneumatic operators, spring return type with non-ferrous metal bellows or diaphragm
of neoprene or other elastomer location. Bellows or diaphragm shall be of sufficient
size so that a change in operating pressure of not more than 2 percent of the total
motor operating pressure range will be required to start the valve or damper moving.
Provide positive positioning or sequencing relays with adjustable operating range and
starting point for operators sequenced with other operators to permit adjustment of
control sequences, except for control valves in confined spaces in terminal units,
which may use springs with range selected to provide necessary sequencing.
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Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2. Electric damper operator shall provide full modulating control of dampers. A linkage
and pushrod shall be furnished for mounting the actuator on the damper frame
internally in the duct or externally on the duct wall, or shall be furnished with a
direct-coupled design.
3. Electronic damper operators: VAV Box actuator shall be mounted on the damper axle
or shall be of the air valve design, and shall provide complete modulating control of
the dampers. The motor shall have a closure torque of 35-inch pounds minimum
with full torque applied at close off to attain minimum leakage.
4. Relays shall be of the following type:
a. Pneumatic: Diverting, selector, proportional, sequencing, ratio, positive
positioning, biasing, repeating.
b. Electrical Interlocking Relays: Electric-pneumatic (EP) or pneumatic- electric (PE)
types.
c. Electrical pilot duty of contactor types. Provide inductive rated contacts for
circuits with coils, motors or other inductive devices.
1.7
AIR FLOW CONTROL AND MONITORING
A. Airflow and static pressure shall be controlled via digital controller (CUs) with inputs from
airflow control measuring stations and static pressure inputs as specified. Controller
outputs shall be true analog output signals to pneumatic positioners or variable frequency
drives. Pulse width modulation outputs are not acceptable. The CUs shall include the
capability to control via simple proportional (P) control, proportional plus integral (PI),
proportional plus integral plus derivative (PID), and on-off. The airflow control programs
shall be factory-tested programs that are documented in the literature of the control
manufacturer.
B. Air Flow Measuring Station
1. Airflow measuring stations shall measure airflow by the pitot tube traverse method.
Each unit shall consist of a network of static and total pressure sensors, factory
positioned and connected in parallel, to produce and equalized velocity pressure. The
measured velocity pressure converted to airflow (cfm) shall have accuracy within 2
percent of the full scale throughout the velocity range from 200 to 1,200 meter per
minute (700 to 4,000 fpm).
2. Airflow measuring stations shall consist of 16-gauge sheet metal casing, an
aluminium air velocity treatment and air straightening section with an open face area
not less than 97 percent and a total and static pressure sensing manifold made of
copper. Each station shall contain non-combustible sensors, which shall be incapable
of producing toxic gases of fumes in the event of elevated duct temperatures. All
interconnecting tubing shall be internal to the unit with the exception of one total
pressure and one static pressure meter connection.
3. Each airflow measuring station shall be installed to meet at least the manufacturer’s
minimum installation conditions and shall not amplify the sound level within the duct.
The maximum resistance to airflow shall not exceed 0.3 times the velocity head for
the duct stations and 0.6 time the velocity head for the fan stations. The unit shall be
suitable for continuous operation up to a temperature of 120 degree C (250 degrees
F).
4. Differential pressure transducers shall measure and transmit pressure signals to the
direct digital controller CU. The differential pressure transducers shall operate in one
of four ranges of the total span.
1.8
ULTRASONIC, THERMAL, THERMAL-ENERGY METERS:
1. Basis-of-Design: Subject to compliance with requirements, provide Honeywell or
comparable product by one of the following:
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-8
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
a. Dynasonics
b. Siemens Energy and Automation, Inc.
c. Tangshan Huizhong Instrumentation Co., Ltd.
2. Description: Meter with flow sensor, temperature sensors, transmitter, indicator, and
connecting wiring.
3. Flow Sensor: Transit-time ultrasonic type with transmitter.
4. Temperature Sensors: Insertion-type or strap-on transducer.
5. Indicator: Solid-state, integrating-type meter with integral battery pack.
a. Data Output: Six-digit electromechanical counter with readout in kilowatts per hour
or British thermal units (joules)
b. Battery Pack: Five-year lithium battery.
6. Accuracy: Plus or minus 1 percent.
7. Display: Visually indicates total fluid volume in gallons (liters) and thermal- energy flow in
kilowatts per hour or British thermal units (joules).
8. Operating Instructions: Include complete instructions with each thermal- energy meter
system.
9. Mount thermal-energy meters on wall if accessible; if not provide brackets to support
meters.
1.9
SEQUENCE OF OPERATION/CONTROL SEQUENCE
I.
AHU (CAV)
A. Normal Mode
1. The system shall be provided with Manual-Off Auto (H-0-A) selector switch. In
the Manual mode, each individual component can be operated manually while
automatic operation is disabled. In system off mode, neither manual nor
automatic operation is possible.
2. In the auto mode, the system is started or stopped remotely thru the BMS or the
local motor control panel at the AHU Room.
3. Upon start of the AHU, AC control system is energized, fresh/outdoor air damper
opens to its present position, control valve opens and modulates based on the
average return air temperature (or room temperature for zones with single
space) being sensed.
4. The fresh/outdoor air damper throttles based on the CO2 level difference
between the outdoor air and as sensed by the CO2 sensor located at the return
of the AHU and/or at the space/room. A 700 ppm difference is maintained by the
System. The minimum quantity of fresh/outdoor air supplied by the FAHU to
each floor should be enough to maintain building pressurization at all times.
5. Dirty filter status and alarm for each of the filters shown shall be indicated in the
BMS.
6. Alarm is indicated in the BMS when the preset CO2 differential is exceeded by
more than 10% ppm when the motorized damper is fully open.
7. The other parameters monitored by the BMS are as shown in the BMS points list
and control schematic diagrams.
B. Emergency Mode
1. On fire mode as sensed by the smoke detector located in the return duct/return
of the AHU or upon receipt of fire signal from Fire Alarm Panel, the AC system
shall shutdown automatically.
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ME-010-9
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2. The fresh/outdoor air damper opens to a preset level to admit supply/make-up
air from the FAHU supply fan.
3. Visual and Audible Alarm mode shall be indicated in the BMS and the MCP at the
AHU Room. Mute switch shall be provided to silence the alarm
4. After the emergency condition is over, the system shall be restored to normal
mode thru a “System Restore” switch.
II. AHU (VAV) (WHERE APPLICABLE)
A. Normal Mode
1. The system shall be provided with Manual-Off Auto (H-0-A) selector switch. In
the Manual mode, each individual component can be operated manually while
automatic operation is disabled. In system off mode, neither manual nor
automatic operation is possible.
2. In the auto mode, the system is started or stopped remotely thru the BMS or the
local motor control panel at the AHU Room.
3. Upon start of the AHU, AC control system is energized, fresh/outdoor air damper
opens to its present position, control valve opens and modulates in response to
discharge air temperature as sensed by say by the thermostat which is resettable
thru the BMS.
4. Variable air volume (VAV) terminals throttle to maintain the desired room
temperatures. Based on the resulting increase in duct static pressure as sensed
by the static pressure transmitter, the variable speed drive (VSD) slows down the
AHU fan to maintain the desired static pressure setting. Upon increase in demand
for cooling, the VAV terminals modulates to open position, thereby decreasing
the duct static pressure and causes the VSD to speed up the AHU fan.
5. The fresh/outdoor air damper throttles based on the CO2 level difference
between the outdoor air and as sensed by the CO2 sensor located at the return
of the AHU and/or at the space/room. A 700 ppm difference is maintained by the
System. The minimum quantity of fresh/outdoor air supplied by the FAHU to
each floor should be enough to maintain building pressurization at all times.
6. Dirty filter status and alarm for each of the filters shown shall be indicated in the
BMS.
7. Alarm is indicated in the BMS when the preset CO2 differential is exceeded by
more than 10% ppm when the motorized damper is fully open.
8. The other parameters monitored by the BMS are as shown in the BMS points list
and control schematic diagrams.
B. Emergency Mode
1. On fire mode as sensed by the smoke detector located in the return duct/return
of the AHU or upon receipt of fire signal from Fire Alarm Panel, the AC system
shall shutdown automatically.
2. The fresh/outdoor air damper opens to a preset level to admit supply/make-up
air from the FAHU supply fan.
3. Visual and Audible Alarm mode shall be indicated in the BMS and the MCP at the
AHU Room. Mute switch shall be provided to silence the alarm.
4. After the emergency condition is over, the system shall be restored to normal
mode thru a “System Restore” switch.
III. EXHAUST FANS
A. Normal Mode
1. The system shall be provided with Manual-Off Auto (H-0-A) selector switch. In
the Manual mode, each individual component can be operated manually while
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-10
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
automatic operation is disabled. In system off mode, neither manual nor
automatic operation is possible.
B. Auto Mode
1. The H-0-A is set in the auto mode, the system is started or stopped remotely
thru the BMS.
2. When the fan is running, indication is monitored thru its air flow by means of air
flow sensor/transmitter.
3. On/off status and trip alarm points shall be indicated in the BMS for monitoring.
IV. SUPPLY FANS
A. Normal Mode
1. The system shall be provided with Manual –Off Auto (H-O-A) selector
switch. In the Manual mode, each individual component can be operated
manually while automatic operation is disabled. In the system off mode, neither
manual nor automatic operation is possible.
B. Auto Mode
1. The H-O-A is set in the auto mode, the system is started or stopped remotely
thru the BMS.
2. When the fan is running, indication is monitored thru its flow by means of air
flow sensor transmitter.
3. On/off status and trip alarm points shall be indicated in the BMS for monitoring.
V. FAN COIL UNIT
A. Normal Mode
1. The system shall be provided with Manual-Off Auto (H-O-A) selector switch. In
the Manual mode, each individual component can be operated manually while
automatic operation is disabled. In the system off mode, neither manual nor
automatic operation is possible.
B. Auto Mode
1. The H-O-A is set in the auto mode, the system is started or stopped remotely
thru the BMS. Time schedule and user input will start the auto mode.
2. The temperature control will be determined by the temperature sensor mounted
inside the room. The control program will maintain the room temperature by
modulating the cooling valve.
3. On/off status and trip alarm points shall be indicated in the BMS for
monitoring.
4. For fan coil units serving common areas, fan shall automatically switch to low
speed when rooms are unoccupied.
VI. FRESH AIR HANDLING UNIT (FAHU)
A. Normal Mode
1. The system shall be provided with the Manual-Off Auto (H-0-A) selector switch.
In the Manual mode, each individual component can be operated manually while
automatic operation is disabled. In system off mode, neither manual nor
automatic operation is possible.
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Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2. In the auto mode, the system is started or stopped remotely thru the BMS or the
local motor control panel at the AHU Room.
3. The system is composed of air handling unit, one exhaust fan for toilet exhaust
one exhaust fan for general exhaust.
4. The FAHU pre-cools the fresh air supplied to FCUs located at each floor. Exhaust
air from toilets, and electrical/communication rooms, and building general
exhaust are discharged outside of the building.
5. The motorized dampers at the fresh/outdoor air ducts of the AHU at every floor
throttle depending on the required fresh/outdoor air as dictated through the BMS
and as scheduled for money counting areas. AHU shall be capable of being a
100% fresh air unit during money counting activities and could be a recirculating
AHU when money counting equipment is not in operation, where amount of fresh
air is designed as per occupants’ requirement.
6. Dirty filter status and alarm for each of the filters shown shall be indicated in the
BMS.
7. The other parameters monitored by the BMS are as shown in the BMS points list
and control schematic diagrams.
PART 2 – PRODUCTS
2.1
MANUFACTURERS
A. In other Part 2 articles where titles below introduce lists, the following requirements
apply for product selection:
1. Available Products: Subject to compliance with requirements, products that may
be incorporated into the work
2. Available Manufacturers: Subject to compliance with requirements,
manufacturers offering products that may be incorporated into the work.
PART 3 – EXECUTION
3.1
INSTALLATION
A. Meet applicable codes, each manufacturer's recommended installation procedures and
Division 16 requirements.
B. Install all equipment so as to be mechanically stable and to allow easy access. Fix as
necessary to wall or floor. Provide anti-vibration mounting where required to properly
isolate the equipment.
C. Install all equipment in locations providing adequate ambient conditions for its
specified functioning, allowing for adequate ventilation.
D. Provide complete shop drawings for review.
E. Review proposed location of any equipment with Owner prior to its installation.
F. Where the point schedules indicate auxiliary contact provision, provide all
instrumentation, wiring, conduit, power supplies and services as required to integrate
these points into the BMS.
G. Provide interposing and motor control relays at the local item of equipment or at the
associated MCC as applicable. Provide all relays, wiring, conduit, power supplies and
services as required to integrate these points into the BMS.
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
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Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
H. Wire all equipment which is part of the same control loop to the same field panel.
3.2
IDENTIFICATION
A. Provide for each piece of instrumentation and end device, a 50 mm x 75 mm plastic
nameplate embossed to indicate the following:
1.
2.
3.
4.
Mnemonic for point
Remote field panel and termination
English language description
Field panel
B. Affix the nameplate to the equipment with self-tapping screws or bead chain or similar
device.
C. Submit specimen nameplate and a complete list of descriptive titles for approval prior to
installation.
3.3
WIRING
A. Provide all wiring required for Instrumentation. Install in IMC conduit, and otherwise
comply with Division 16 requirements. Approved plenum cable wire may be used where
allowed by code.
B. Provide power wiring from nearest emergency powered panel to each field device as
required.
C. Provide necessary relays required to interconnect equipment.
D. Install wiring parallel and perpendicular to building planes.
3.4
FACTORY BUILT EQUIPMENT (WHERE APPLICABLE)
A. Factory built equipment such as roof top air conditioners, gas fired make up air units,
VAV terminals, water source heat pumps, etc., require control devices supplied by this
Section, refer to individual Specification Sections for exact requirements.
B. Provide all required components to completely interface items with the BMS,
including relays, actuators, thermostats, terminal control units and other devices to make
a complete and operational system.
C. Install thermostats and control wiring for equipment where thermostats are factory
supplied.
3.5
WARNING NOTICES
A. Place warning notices at the MCC Panel, local starter and on or close to all motors under
BMS control.
B. Make the notices conspicuous with bold lettering to advise that the motor is under BMS
control and may start at any time without warning. Submit sample notice for review prior
to installation.
END OF SECTION 15900
SECTION15900 HVAC INSTRUMENTATION AND CONTROLS
ME-010-13
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
SECTION 15950
TESTING, ADJUSTING AND BALANCING
PART 1 - GENERAL
1.1
DESCRIPTION
A. Testing, adjusting, and balancing (TAB) of heating, ventilating and air conditioning
(HVAC) systems. TAB includes the following:
1. Planning systematic TAB procedures.
2. Inspecting equipment and installations for conformance with design.
3. Balancing air systems; adjustment of total system to provide
performance; and testing performance of equipment and automatic controls.
4. Vibration and sound measurements.
5. Recording and reporting results.
design
B. Definitions:
1. Basic TAB used in this Section: Chapter 34, "Testing, Adjusting and Balancing" of
ASHRAE Handbook, "HVAC Applications".
2. TAB: Testing, Adjusting and Balancing. The process of checking and adjusting HVAC
systems to meet design objectives.
3. AABC: Associated Air Balance Council.
4. NEBB: National Environmental Balancing Bureau.
5. Air Systems: Includes all outside air, supply air, return air, exhaust air and relief air
systems.
6. Flow rate tolerance: The allowable percentage variation, minus to plus, of actual flow
rate from values (design) in the contract documents.
1.2
RELATED WORK
A. Section 15050, Basic Mechanical Materials and Methods
B. Section 15011, Mechanical Vibration and Seismic Controls
C. Section l5080, Mechanical Insulation.
D. Section 15815, Metal Ducts And Accessories
1.3
QUALITY ASSURANCE
A. Refer to Articles, Quality Assurance and Submittals, in Section 15050, Basic
Mechanical Materials and Methods.
B. TAB Agency Qualification: Current membership in AABC or certification by NEBB.
C. Test
Equipment
Criteria:
The
basic
instrumentation
requirements
and
accuracy/calibration required by AABC, National Standards or by NEBB Procedural
Standards for Testing, Adjusting and Balancing of Environmental Systems.
D. TAB Criteria:
1. One or more of the applicable AABC, NEBB or SMACNA publications, supplemented
by ASHRAE Handbook "HVAC Applications" Chapter 34, shall be the basis for
planning, procedures, and reports.
SECTION 15950 TESTING, ADJUSTING AND BALANCING
ME-011-1
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
2. Flow rate tolerance: Values are based on discussion in ASHRAE Handbook "HVAC
Applications", Chapter 34. Air Filter resistance during tests, artificially imposed if
necessary, shall be at least 80 percent of final values for prefilters and after filters.
a. Air handling unit cubic meters/min (cubic feet per minute): Minus 0 percent to
plus l0 percent.
b. All other fans: Minus 0 percent to plus l0 percent.
c. Air terminal units (Max): Minus 5 percent to plus l0 percent.
d. Exhaust hoods/cabinets: Minus 0 percent to plus l0 percent.
e. Minimum outside air: Minus 0 percent to plus 10 percent.
f. Individual room air outlets and inlets, and air flow rates not mentioned
above: Minus l0 percent to plus l0 percent.
3. Systems shall be adjusted for energy efficient operation as described in PART
3.
4. Typical TAB procedures and results shall be demonstrated to the Consultant for one
air distribution system (including all fans, three terminal units, three rooms) and one
hydronic system (pumps and three coils) as follows:
a. When field TAB work begins.
b. During each partial final inspection and the final inspection for the project if
requested by the Consultant.
1.4
SUBMITTALS
A. Submit in accordance with Section 01300, Submittals.
B. TAB Agency qualifications: Submit names and qualifications of company officers and job
supervisor. Submit information on three recently completed projects. Submit list of
proposed test equipment.
C. For use by the Consultant staff, submit one complete set of applicable AABC or NEBB
publications that will be the basis of TAB work.
D. TAB Reports to be Submitted for Review:
1. Inspection reports covering equipment and systems installation. These reports are to
be submitted during early stages of the project in order to allow timely correction of
deficiencies.
2. TAB reports covering flow balance and adjustments, performance tests, vibration
tests, and sound tests. These reports shall be submitted prior to or at the time of
requesting final inspection, or partial final inspections of contract work.
a. Include in final reports uncorrected installation deficiencies noted during TAB and
applicable explanatory comments on test results that differ from design
requirements.
1.5
APPLICABLE PUBLICATIONS
A. The following publications form a part of this specification to the extent indicated by the
reference thereto. In text the publications are referenced to by the initials of the
organization.
B. American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc.
(ASHRAE):
SECTION 15950 TESTING, ADJUSTING AND BALANCING
ME-011-2
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
- ASHRAE Handbook, 1995 HVAC Applications, Chapter 34, Testing, Adjusting, and
Balancing; Chapter 43, Sound and Vibration Control.
C. Associated Air Balance Council (AABC):
- AABC National Standards MN-l, 5th Edition, 1989.
D. National Environmental Balancing Bureau (NEBB):
- Procedural Standards for Testing, Adjusting, Balancing of Environmental Systems, 5th
Edition, September l991.
- Procedural Standards for the Measurement and Assessment of Sound and Vibration,
1994 Edition.
E. Sheet Metal and Air Conditioning Contractors National Association (SMACNA):
- HVAC SYSTEMS-Testing, Adjusting and Balancing, 2nd Edition, l993.
PART 2 - PRODUCTS
2.1
PLUGS
Provide plastic plugs to seal holes drilled in ductwork for test purposes.
2.2
INSULATION REPAIR MATERIAL
Section, INSULATION. Provide for repair of insulation removed or damaged for TAB work.
2.3
AIR BALANCE SYSTEM KIT SIMILAR TO
INSTRUMENTS INC. OR APPORVED EQUAL
“FLOWHOOD”
BY
SHORTRIDGE
A. Air Data Multimeter model ADM-850 complete with Airflow Measuring base assembly,
battery charger, carrying case.
B. Five top Kit (2” x 2, 2” x 4’, 1” x 5”, 3” x 3”)
C. Pilot tube 18” long
D. Temprobe (ADT 442)
E. Temperature netractile cord. 6’ long (TRC-16)
F. Temperature extension wand, 19” long (TRC-16)
G. Two A-303 static pressure tips.
H. Neoprene tubing set, two 5” long and one 10’ long.
PART 3 - EXECUTION
3.1
GENERAL
A. Refer to TAB Criteria in Article, Quality Assurance.
B. Obtain applicable contract documents and copies of approved submittals for HVAC
equipment and automatic control systems.
SECTION 15950 TESTING, ADJUSTING AND BALANCING
ME-011-3
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
C. Coordinate TAB procedures with any phased construction completion requirements for
the project. Systems serving completed phases of the project will require TAB for such
phases prior to partial final inspections and for final phase inspection.
D. Allow sufficient time in construction schedule for TAB and submission of reports prior to
partial final inspections and for final phase.
3.2
INSPECTING EQUIPMENT AND INSTALLATION FOR CONFORMANCE WITH DESIGN
A. GENERAL: The inspection and report is to be done after air distribution equipment is on
site and duct installation has begun, but well in advance of performance testing and
balancing work. The purpose of the inspection is to identify and report deviations from
design and ensure that systems will be ready for TAB at the appropriate time.
B. Reports: Follow check list format developed by AABC, NEBB or SMACNA, supplemented
by narrative comments, with emphasis on air handling units and fans. Check for
conformance with submittals. Verify that diffuser and register sizes are correct. Check air
terminal unit installation including flexible duct sizes and routing.
3.3
TAB PROCEDURES
A. General: During TAB all related system components shall be in full operation. Fan and
pump rotation, motor loads and equipment vibration shall be checked and corrected as
necessary before proceeding with TAB. Set controls and/or block off parts of distribution
systems to simulate design operation of variable volume air or water systems for test and
balance work.
B. Air Balance and Equipment Test: Include air handling units, fans, terminal units, room
diffusers/outlets/inlets, and laboratory hoods and cabinets.
1. Artificially load air filters by partial blanking to produce air pressure drop of at least
80 percent of the design final pressure drop, or as prescribed under Pressurization
Commissioning (Item 3.3 C).
2. Adjust fan speeds to provide design air flow. V-belt drives, including fixed pitch pulley
requirements, are specified in Section 15050, BASIC MECHANICAL MATERIALS AND
METHODS.
3. Test and balance systems in all specified modes of operation, including fire
emergency modes. Verify that dampers and other controls function properly.
a. Coordinate TAB, including system volumetric controls, with Section 15950,
TESTING, ADJUSTING AND BALANCING.
4. Record final measurements for air handling equipment performance data sheets.
C. Space Pressurization Commissioning.
3.4
VIBRATION TESTING
A. Furnish instruments and perform vibration measurements as specified in Section 15071,
Mechanical Vibration and Seismic Controls. Field vibration balancing is specified in
Section 15050, Basic Mechanical Materials and Methods. Provide measurements for all
rotating HVAC equipment 373 watts (1/2 horsepower) and larger, including
centrifugal/screw compressors, pumps, fans and motors.
B. Record initial and final measurements for each unit of equipment on test forms. Where
vibration readings exceed the allowable tolerance and efforts to make corrections have
proved unsuccessful, forward a separate report to the Consultant.
SECTION 15950 TESTING, ADJUSTING AND BALANCING
ME-011-4
Renovation of PDIC Building in Chino Roces (Phase 3)
2228 Chino Roces Avenue, Makati City
3.5
SOUND TESTING
A. Perform and record required sound measurements in accordance with Paragraph,
QUALITY ASSURANCE in Section 15071 Mechanical Vibration and Seismic Controls.
1. Take readings in rooms, approximately three/five/ten percent of total rooms,
designated by the Consultant.
B. Take measurements with a calibrated sound level meter and octave band analyzer of the
accuracy required by AABC or NEBB.
C.
Sound reference levels, formulae and coefficients shall be according to ASHRAE
Handbook, "HVAC Applications", Chapter 43, SOUND AND VIBRATION CONTROL.
D. Determine compliance with specifications as follows:
1. Where sound pressure levels are specified, including the NC Criteria in Section 15071,
Mechanical Vibration and Seismic Controls.
a. Reduce the background noise as much as possible by shutting off unrelated
audible equipment.
b. Measure octave band sound pressure levels with specified equipment "off."
c. Measure octave band pressure levels with specified equipment "on."
d. Use the DIFFERENCE in corresponding readings to determine the sound pressure
due to equipment.
DIFFERENCE:
FACTOR:
0
10
1
7
2
4
3
3
4
2
5-9
1
10 or More
0
Sound pressure level due to equipment equals sound pressure level with
equipment "on" minus FACTOR.
e. Plot octave bands of sound pressure level due to equipment for typical
rooms on a graph which also shows noise criteria (NC) curves.
2. When sound power levels are specified:
a. Perform steps 1.a. thru 1.d., as above.
b. For indoor equipment: Determine room attenuating effect, i.e., difference
between sound power level and sound pressure level. Determined sound power
level will be the sum of sound pressure level due to equipment plus the room
attenuating effect.
c. For outdoor equipment: Use directivity factor and distance from noise source to
determine distance factor, i.e., difference between sound power level and sound
pressure level. Measured sound power level will be the sum of sound pressure
level due to equipment plus the distance factor.
E. Where measure sound levels exceed specified level, the installing contractor or
equipment manufacturer shall take remedial action approved by the Consultant and the
necessary sound tests shall be repeated.
3.6
DUCT AIR LEAKAGE TESTING
A. Refer Article, Quality Assurance, in Section 15815 - Metal Ducts and Accessories, for TAB
agency’s role and responsibilities.
END OF SECTION 15950
SECTION 15950 TESTING, ADJUSTING AND BALANCING
ME-011-5