HomeMy WebLinkAbout23 81 26 Split System Air ConditionersBEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP SPLIT-SYSTEM AIR-CONDITIONERS
STANDARD SPECIFICATIONS 23 81 26 – PAGE 1 OF 6
MARCH 29, 2013
SECTION 238126 -- SPLIT-SYSTEM AIR-CONDITIONERS
PART 1 GENERAL
1.1 SUBMITTALS
A. Product Data: Provide for each type of product indicated. Include rated
capacities, operating characteristics, and furnished specialties and
accessories. Include performance data in terms of capacities, outlet
velocities, static pressures, sound power characteristics, motor requirements,
and electrical characteristics.
B. Shop Drawings: Include plans, elevations, sections, details, and attachments
to other work.
1. Detail equipment assemblies and indicate dimensions, weights, loads,
required clearances, method of field assembly, components, and location
and size of each field connection.
2. Wiring Diagrams: For power, signal, and control wiring.
C. Samples for Initial Selection: For units with factory-applied color finishes.
D. Field quality-control reports.
E. Operation and Maintenance Data: For split-system air-conditioning units to
include in emergency, operation, and maintenance manuals.
F. Warranty: Sample of special warranty.
1.2 QUALITY ASSURANCE
A. Electrical Components, Devices, and Accessories: Listed and labeled as
defined in NFPA 70, by a qualified testing agency, and marked for intended
location and application.
B. ASHRAE Compliance:
1. Fabricate and label refrigeration system to comply with ASHRAE 15,
"Safety Standard for Refrigeration Systems."
2. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1,
Section 4 - "Outdoor Air Quality," Section 5 - "Systems and Equipment,"
Section 6 - " Procedures," and Section 7 - "Construction and System
Start-Up."
C. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP SPLIT-SYSTEM AIR-CONDITIONERS
STANDARD SPECIFICATIONS 23 81 26 – PAGE 2 OF 6
MARCH 29, 2013
1.3 COORDINATION
A. Coordinate sizes and locations of concrete bases with actual equipment provided.
Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork are
specified in Division 03 Section "Cast-in-Place Concrete."
B. Coordinate sizes and locations of roof curbs, equipment supports, and roof
penetrations with actual equipment provided.
1.4 WARRANTY
A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to
repair or replace components of split-system air-conditioning units that fail in
materials or workmanship within specified warranty period.
1. Warranty Period:
a. For Compressor: Five year(s) from date of Substantial Completion.
b. For Parts: Five year(s) from date of Substantial Completion.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Basis-of-Design Product: Subject to compliance with requirements, provide
product indicated on Drawings or comparable product by one of the following:
1. Daikin
2. Friedrich Air Conditioning Company.
3. Koldwave, Inc.; a Mestek company.
4. Lennox International Inc.
5. Mitsubishi Electric HVAC Advanced Products Division.
6. SANYO HVAC
7. Trane; a business of Ingersol Rand
8. YORK; a Johnson Controls company.
2.2 INDOOR UNITS 5 TONS (18 kW) OR LESS
A. Cassette Type Evaporator-Fan Components:
1. Chassis: Galvanized steel, 24" x 24" square unit suspended from structure
with four-way grille fixed to bottom of cabinet.
2. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and
thermal-expansion valve. Comply with AHRI 210/240.
3. Fan: Direct drive, centrifugal.
4. Fan Motors:
a. Multitapped, multispeed with internal thermal protection and permanent
lubrication.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP SPLIT-SYSTEM AIR-CONDITIONERS
STANDARD SPECIFICATIONS 23 81 26 – PAGE 3 OF 6
MARCH 29, 2013
b. Enclosure type: Totally enclosed, fan cooled.
c. NEMA Premium (TM) efficient motors as defined in NEMA MGI.
d. Controllers, electrical devices & wiring: Comply with requirements for
electrical devices & connections specified in Division 26 sections.
5. Airstream Surfaces: Surfaces in contact with the airstream shall comply with
requirements in ASHRAE 62.1.
6. Filters: Permanent, cleanable.
7. Condensate Drain Pans:
a. Fabricated with one percent slope in at least two planes to collect
condensate from cooling coils (including coil piping connections, coil
headers, and return bends), and to direct water toward drain connection.
1) Depth: A minimum of 1" deep.
b. Single-wall, stainless-steel sheet.
c. Drain Connection: Located at lowest point of pan and sized to prevent
overflow. Terminate with threaded nipple on one end of pan.
8. Accessories:
a. Provide mini condensate pump where specified on drawings. Field
installed
b. Provide fully insulated full port ball valve with service port installed in
each refrigerant line at each indoor unit.
c. Provide auxillary condensate detection device that is a field installed
accessory in addition to any factory installed condensate detection
devices.
B. Wall-Mounted, Evaporator-Fan Components:
1. Cabinet: Enameled steel with removable panels on front and ends in white
color finish, and discharge drain pans with drain connection.
2. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and
thermal-expansion valve. Comply with AHRI 210/240.
3. Fan: Direct drive, centrifugal.
4. Fan Motors:
a. Multitapped, multispeed with internal thermal protection and permanent
lubrication.
b. Enclosure Type: Totally enclosed, fan cooled.
c. NEMA Premium (TM) efficient motors as defined in NEMA MG 1.
d. Controllers, Electrical Devices, and Wiring: Comply with requirements for
electrical devices and connections specified in Division 26 Sections.
5. Airstream Surfaces: Surfaces in contact with the airstream shall comply with
requirements in ASHRAE 62.1.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP SPLIT-SYSTEM AIR-CONDITIONERS
STANDARD SPECIFICATIONS 23 81 26 – PAGE 4 OF 6
MARCH 29, 2013
6. Condensate Drain Pans:
a. Fabricated with one percent slope in at least two planes to collect
condensate from cooling coils (including coil piping connections, coil
headers, and return bends) and humidifiers, and to direct water toward
drain connection.
1) Depth: A minimum of 1 inch (25 mm) deep.
b. Single-wall, stainless-steel sheet.
c. Drain Connection: Located at lowest point of pan and sized to prevent
overflow. Terminate with threaded nipple on one end of pan.
d. Pan-Top Surface Coating: Asphaltic waterproofing compound.
7. Accessories:
a. Provide mini condensate pump where specified on drawings. Field
installed.
b. Provide fully insulated full port ball valve with service port installed in
each refrigerant line at each indoor unit.
c. Provide auxillary condensate detection device that is a field installed
accessory in addition to any factory installed condensate detection
devices.
2.3 OUTDOOR UNITS (5 TONS (18 kW) OR LESS)
A. Air-Cooled, Compressor-Condenser Components:
1. Casing: Steel, finished with baked enamel in color selected by Architect, with
removable panels for access to controls, weep holes for water drainage, and
mounting holes in base. Provide brass service valves, fittings, and gage
ports on exterior of casing.
2. Compressor: Hermetically sealed with crankcase heater and mounted on
vibration isolation device. Compressor motor shall have thermal- and
current-sensitive overload devices, start capacitor, relay, and contactor.
a. Compressor Type: Scroll, inverter driver.
b. Variable speed compressor motor with manual-reset high-pressure
switch and automatic-reset low-pressure switch.
c. Refrigerant Charge: R-410A.
d. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins
and liquid subcooler. Comply with AHRI 210/240.
3. Heat-Pump Components: Reversing valve and low-temperature-air cutoff
thermostat.
4. Fan: Aluminum-propeller type, directly connected to motor.
5. Motor: Permanently lubricated, with integral thermal-overload protection.
6. Low Ambient Kit: Permits operation down to 0 deg F (-17 deg C).
7. Mounting Base: Polyethylene.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP SPLIT-SYSTEM AIR-CONDITIONERS
STANDARD SPECIFICATIONS 23 81 26 – PAGE 5 OF 6
MARCH 29, 2013
2.4 ACCESSORIES
A. Thermostat: Wall mounted to control compressor and evaporator fan, with the
following features:
1. Liquid-crystal display indicating temperature, set-point temperature, time
setting, operating mode, and fan speed.
2. Fan-speed selection including auto setting.
3. On/off, cool, heat & auto operation mode.
B. Automatic-reset timer to prevent rapid cycling of compressor.
C. Refrigerant Line Kits: Soft-annealed copper suction and liquid lines factory
cleaned, dried, pressurized, and sealed; factory-insulated suction & liquid lines
with flared fittings at both ends.
1. Drain Hose: For condensate.
PART 3 EXECUTION
3.1 INSTALLATION
A. Install units level and plumb.
B. Install evaporator-fan components using manufacturer's standard mounting
devices securely fastened to building structure.
C. Install ground-mounted, compressor-condenser components on 4-inch- (100-
mm-) thick, reinforced concrete base that is 4 inches (100 mm) larger, on each
side, than unit. Concrete, reinforcement, and formwork are specified in
Division 03 Section "Cast-in-Place Concrete." Coordinate anchor installation with
concrete base.
D. Anchor units to supports with removable, cadmium-plated fasteners.
E. Install compressor-condenser components on restrained, spring isolators with a
minimum static deflection of 1 inch (25 mm).
F. Install and connect precharged refrigerant tubing to component's quick-connect
fittings. Install tubing to allow access to unit.
3.2 CONNECTIONS
A. Piping installation requirements are specified in other Division 23 Sections.
Drawings indicate general arrangement of piping, fittings, and specialties.
BEARDSLEY DESIGN ASSOCIATES
CORNELL – NCP SPLIT-SYSTEM AIR-CONDITIONERS
STANDARD SPECIFICATIONS 23 81 26 – PAGE 6 OF 6
MARCH 29, 2013
B. Where piping is installed adjacent to unit, allow space for service and
maintenance of unit.
3.3 FIELD QUALITY CONTROL
A. Manufacturer's Field Service: Engage a factory-authorized service representative
to inspect, test, and adjust components, assemblies, and equipment installations,
including connections.
B. Perform tests and inspections.
1. Manufacturer's Field Service: Engage a factory-authorized service
representative to inspect components, assemblies, and equipment
installations, including connections, and to assist in testing.
C. Tests and Inspections:
1. Leak Test: After installation, charge system and test for leaks. Repair leaks
and retest until no leaks exist.
2. Operational Test: After electrical circuitry has been energized, start units to
confirm proper motor rotation and unit operation.
3. Test and adjust controls and safeties. Replace damaged and malfunctioning
controls and equipment.
D. Remove and replace malfunctioning units and retest as specified above.
E. Prepare test and inspection reports.
3.4 STARTUP SERVICE
A. Engage a factory-authorized service representative to perform startup service.
1. Complete installation and startup checks according to manufacturer's written
instructions.
3.5 DEMONSTRATION
A. Engage a factory-authorized service representative to train Owner's maintenance
personnel to adjust, operate, and maintain units.
END OF SECTION 23 81 26