Idea Transcript
Copyright 2016 AIA
City of Duluth – Festival Center
09/16
***Amd 0001*** 05/23/2018
SECTION 23 81 26 - SPLIT-SYSTEM AIR-CONDITIONERS PART 1 - GENERAL 1.1
RELATED DOCUMENTS A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary Conditions and Request for Proposal, apply to this Section. SUMMARY
A.
1.3
Section includes split-system air-conditioning and heat-pump units consisting of separate evaporator-fan and compressor-condenser components. ACTION SUBMITTALS
A.
Product Data: 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.
2. 1.4
Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection. Wiring Diagrams: For power, signal, and control wiring.
INFORMATIONAL SUBMITTALS A.
Field quality-control reports.
B.
Warranty: Sample of special warranty.
1.5
CLOSEOUT SUBMITTALS A.
1.6
Operation and Maintenance Data: For split-system air-conditioning units to include in emergency, operation, and maintenance manuals. MAINTENANCE MATERIAL SUBMITTALS
A.
Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.
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Copyright 2016 AIA
City of Duluth – Festival Center
09/16
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Filters: Three set(s) for each furnace/coil unit.
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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. 2.
C. 1.8
Fabricate and label refrigeration system to comply with ASHRAE 15, "Safety Standard for Refrigeration Systems." 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."
ASHRAE/IES Compliance: Applicable requirements in ASHRAE/IES 90.1. COORDINATION
A.
1.9
Coordinate sizes and locations of attic access, existing conditions, equipment supports, and roof penetrations with actual equipment provided. 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. b. c.
For Compressor: Seven year(s) from date of Substantial Completion. For Parts: One year from date of Substantial Completion. For Labor: One year from date of Substantial Completion.
PART 2 - PRODUCTS 2.1
MANUFACTURERS A.
Carrier
B.
Trane
C.
Johnson Controls
D.
McQuay
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Copyright 2016 AIA
City of Duluth – Festival Center
09/16
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INDOOR UNITS (5 TONS (18 kW) OR LESS) A.
Concealed Evaporator-Fan Components: 1. 2. 3. 4. 5.
Chassis: Galvanized steel with flanged edges, removable panels for servicing, and insulation on back of panel. Insulation: Faced, glass-fiber duct liner. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and thermalexpansion valve. Comply with ARI 206/110. Fan: Forward-curved, double-width wheel of galvanized steel; directly connected to motor. Fan Motors: a.
b. c. d. e. 6. 7. 8.
Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements specified in Section 230513 "Common Motor Requirements for HVAC Equipment." Multitapped, multispeed with internal thermal protection and permanent lubrication. Wiring Terminations: Connect motor to chassis wiring with plug connection. Wheel: Galvanized blower wheel shall be centrifugal type, statically and dynamically balanced/ Permanently lubricated with sealed ball bearings. Motor: ECM
Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1. Filters: 1” MERV 13, non-pleated 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)
b. c. d. e. B.
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Length: Extend drain pan downstream from leaving face to comply with ASHRAE 62.1
Single-wall, galvanized-steel sheet. Drain Connection: Located at lowest point of pan and sized to prevent overflow. Terminate with threaded nipple on both ends of pan. Pan-Top Surface Coating: Asphaltic waterproofing compound. Units with stacked coils shall have an intermediate drain pan to collect condensate from top coil.
INDOOR AIR COIL (66,000 BTU OR LESS) 1. Coil shall be compatible and by the same manufacturer as the outdoor condenser. 2. Coil: Cased in 22-gauge, galvanized steel cabinet. 3. Evaporator Material: Aluminum Coil 4. TXV refrigeration valve for R-410a required. 5. Fully insulated cabinet 6. Interior drain pan required. Connect to existing drain lines. Verify drains are clear and properly sloped. 7. Warranty: 1 year labor, 10 year parts.
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Copyright 2016 AIA
City of Duluth – Festival Center
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C.
2.3
05/23/2018 GAS FURNACES (120,00 BTU OR LESS) 1. Fuel Type: Natural Gas (Contactor shall verify pressure and requirements) 2. Type: Condensing 3. Efficiency: 92% minimum 4. Filter: Furnish and install external media cabinet for 1” Merv 13 filters. Door shall be hinged with locking mechanism that can be opened without the use of tools. 5. Unit shall be designed, test and constructed to the current ANSI Z 21.47/CSA 2.3 design standard for gas-fired central furnaces. 6. Warranty: 1 year labor, 5 year parts, and 20 year heat exchanger. 7. Heat Exchangers: Shall be of aluminized steel or stainless steel. 8. Gas Valve: Modulating (between 40% and 100%) 9. Controls: Shall include a micro-processor-based integrated electronic control board and a self-test feature that checks all major functions of the furnace. Multiple operational settings shall be available, including blower speeds for high heat, low cooling, high cooling and continuous fan. Continuous fan speed may be adjusted from thermostat. 10. Electrical: 115 Volt, 60 Hz, Single Phase 11. Unit shall be compatible with thermostat requirements and the cooling side split system. 12. Vent Kit: Furnish and install concentric vent kit. Provide adapters to existing roof penetrations or employ a licensed roofing contractor to install or modify any roof penetrations. Vent material and sizing shall comply with manufacturer’s recommendations. OUTDOOR UNITS (5 TONS (18 kW) OR LESS)
A.
Air-Cooled, Compressor-Condenser Components: 1.
2.
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. 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.
******************************AMENDMENT 0001************************************ b. Single-speed two-speed compressor motor with manual-reset high-pressure switch and automatic-reset low-pressure switch. ************************************************************************************ c. Refrigerant: R-410A d. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins and liquid subcooler. Comply with ARI 206/110. 3. 4. 5. 6. 7.
Heat-Pump Components: Reversing valve and low-temperature-air cutoff thermostat. Fan: Aluminum-propeller type, directly connected to motor. Motor: Permanently lubricated, with integral thermal-overload protection. Low Ambient Kit: Permits operation down to 45 deg F (7 deg C). Mounting Base: Polyethylene.
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Copyright 2016 AIA
City of Duluth – Festival Center
09/16
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ACCESSORIES A.
05/23/2018
Control equipment and sequence of operation are: - Upstairs units shall allow occupants to change the temperature ±5°F with a 4-hour override. - Downstairs units shall allow occupants to change the temperature ±2°F with a 2-hour override. - Thermostats for all six systems in the building shall be replaced. (*Note the existing system to remain is a LENNOX system. Condenser Model #: TSA042S4N43Y, Serial #: 5814G12070. Indoor Coil Model #: CX34-43C-6F-1, Serial #: 6014H20678. Gas furnace model number was not accessible) - Thermostats shall be able to be adjusted off-site. Control access shall only be for Users approved by the City. Thermostats shall be able to change temperature of space, throttle between heating and cooling, and have alarm notice if temperature exceeds set point allowable variances. - Thermostat shall be a 7-day programmable thermostat that is first programmed by the contractor with occupied and unoccupied setpoints provided by the Owner.
B.
Thermostat: Low voltage with subbase to control compressor and evaporator fan.
C.
Automatic-reset timer to prevent rapid cycling of compressor.
D.
Refrigerant Line Kits: Soft-annealed copper suction and liquid lines factory cleaned, dried, pressurized, and sealed; factory-insulated suction line with flared fittings at both ends. Lines shall not exceed manufacturer recommended lengths. New piping is to follow existing piping and exit the building in the same location. Seal penetration water and vapor tight.
E.
Drain Hose: For condensate.
**********************************AMENDMENT 0001******************************* F. Furnish and install paint-grip, 22 GA sheet metal cover for linesets on exterior wall. Paint to match brick color ************************************************************************************ 2.5
CAPACITIES AND CHARACTERISTICS NOTE: THESE PERFORMANCE SPECIFICATIONS AND CHARACTERISTICS ARE TO PROVIDE THE CONTRACTOR INFORMATION ON THE EXISTING CONDITIONS TO ALLOW THEM TO DETERMINE WHAT IS BEING REPLACED. CONTRACTOR MUST STILL VERIFY EQUIPMENT IS SIZED APPROPRIATELY AND INSTALL EQUIPMENT PER CURRENT ASHRAE AND BUILDING CODE REQUIREMENTS. A.
Cooling Capacity of Existing Condensers: 1. 2. 3.
CU-1: 60,500 Btu/h. (Engineer of Record to verify load for new units) CU-2: 60,500 Btu/h. (Engineer of Record to verify load for new units) CU-3: 60,500 Btu/h. (Engineer of Record to verify load for new units)
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Copyright 2016 AIA
City of Duluth – Festival Center
09/16
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C.
CU-4: 60,500 Btu/h. (Engineer of Record to verify load for new units) CU-5: 48,000 Btu/h. (Engineer of Record to verify load for new units)
05/23/2018
Heating Capacity of Existing Gas Furnaces: 1.
Gas Heating Section (Engineer of Record to verify load for new units):
-
GF-1: a. Input: 100,000 BTU/HR b. Output: 80,000 BTU/HR
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GF-2: c. Input: 100,000 BTU/HR d. Output: 80,000 BTU/HR
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GF-3: e. Input: 140,000 BTU/HR f. Output: 110,000 BTU/HR
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GF-4: g. Input: 100,000 BTU/HR h. Output: 80,000 BTU/HR
-
GF-5: i. Input: 100,000 BTU/HR j. Output: 80,000 BTU/HR
Indoor Unit: 1.
Existing Cooling Coil Sizes (Engineer of Record to verify load for new units): COIL-1: 60,500 Btu/h. (Engineer of Record to verify load for new units) COIL-2: 60,500 Btu/h. (Engineer of Record to verify load for new units) COIL-3: 60,500 Btu/h. (Engineer of Record to verify load for new units) COIL-4: 60,500 Btu/h. (Engineer of Record to verify load for new units) COIL-5: 48,000 Btu/h. (Engineer of Record to verify load for new units)
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 roof-mounted, compressor-condenser components on equipment pads as recommended by manufacturer. The roof system shall not be damaged. If Contractor is responsible for damage
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Copyright 2016 AIA
City of Duluth – Festival Center
09/16
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05/23/2018 during the construction of the project, they must repair or replace the roof at no additional cost to the City of Duluth. D.
3.2
Install and connect pre-charged refrigerant tubing to component's quick-connect fittings. Install tubing to allow access to unit. CONNECTIONS
A.
Where piping is installed adjacent to unit, allow space for service and maintenance of unit. Pipe shall be routed to allow access for maintenance staff to equipment and must penetrate the exterior wall at the same location as the existing refrigerant piping. All refrigerant and condensate piping for the five split systems being replaced is required to be replaced with new.
B.
Duct Connections: Contractor responsible for any duct modifications required to install new equipment back to the existing duct system. Contractor shall follow all applicable SMACNA standards.
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. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation. 2. 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.
Perform startup service. 1. 2.
Complete installation and startup checks according to manufacturer's written instructions. Provide written documentation showing startup procedures followed. This includes testing of the new thermostats on all six systems in the building.
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Copyright 2016 AIA
City of Duluth – Festival Center
09/16
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DEMONSTRATION A.
05/23/2018
Train Owner's maintenance personnel to adjust, operate, and maintain units. Training shall include written instructions, be scheduled 14 days in advance, and be for a minimum of 4 hours for up to eight staff members select by the City of Duluth.
END OF SECTION 238126
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