Attach 6 2236200 Packaged Compressor and Condenser Units.DOC

SECTION 236200 - PACKAGED COMPRESSOR AND CONDENSER UNITS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Compressor/condenser units, air cooled, 1 to 5 tons (3.5 to 17.6 kW), ground mounted, heat pump.

1.2 SUBMITTALS

A. Product Data: For each product indicated.

1. Coordinate sizing capacity with required heating and cooling calculations required in section 235413 “Electric-Resistance Furnaces.”

2. Include rated capacities, operating characteristics, and furnished specialties and accessories.

3. Include equipment dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

B. Shop Drawings: For compressor and condenser units.

1. Include plans, elevations, sections, and attachment details.

2. Include diagrams for power, signal, and control wiring.

C. Operation and Maintenance Data.

1.3 COORDINATION

A. Coordinate sizes and locations of concrete bases. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork requirements are specified in Section 033000 "Cast-In-Place Concrete."

B. Coordinate location of piping and electrical rough-ins including required electrical clearances.

1.4 MEASUREMENT AND PAYMENT

A. No separate payment will be made for the work included under this section; rather payment shall be considered to be included in the items for work listed in the Schedule of Items.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Carrier Corporation; a unit of United Technologies Corp.

2. Daikin Applied.

3. Lennox.

4. Trane.

5. USA Coil & Air.

6. YORK; a Johnson Controls company.

2.2 COMPRESSOR AND CONDENSER UNITS, AIR COOLED, 1 TO 5 TONS (3.5 TO 17.6 kW) A. Description: Factory assembled and tested; consisting of compressor, condenser coil, fan, motors, refrigerant reservoir, and operating controls.

B. Compressor Type: Scroll, hermetically sealed, with rubber vibration isolators.

1. Motor: Variable speed, and includes thermal- and current-sensitive overload devices, start capacitor, relay, and contactor.

C. Refrigerant: R-410A.

D. Condenser Coil: Seamless copper-tube, aluminum-fin coil; circuited to match compressors, with removable drain pan and brass service valves with service ports.

E. Condenser Fan: Direct-drive, metal propeller fan; with permanently lubricated, totally enclosed fan motor with thermal-overload protection and ball bearings.

F. Accessories:

1. Crankcase heater.

2. Cycle Protector: Automatic-reset timer to prevent rapid compressor cycling.

3. Evaporator Freeze Thermostat: Temperature-actuated switch that stops unit when evaporator reaches freezing temperature.

4. High-Pressure Switch: Automatic-reset switch cycles compressor off on high refrigerant pressure.

5. Liquid-line solenoid.

6. Low-Ambient Controller:

a. Controls condenser fan speed to permit operation down to minus 20 deg F (minus 29 deg C) with time-delay relay to bypass low-pressure switch.

7. Low-Pressure Switch: Automatic-reset switch cycles compressor off on low refrigerant pressure.

8. Thermostatic expansion valve for installation at evaporator coil.

9. Fixed orifice for installation at evaporator coil.

10. Time-Delay Relay: Continues operation of evaporator fan after compressor shuts off.

11. Reversing valve (for heat pump operation).

G. Unit Casing: Galvanized or zinc-coated steel treated and finished with manufacturer's standard paint coating, designed for outdoor installation with weather protection for components and controls; with removable panels for access to controls, weep holes for water drainage, and mounting holes in base. Mount service valves, fittings, and gauge ports on exterior of casing.

H. Capacities and Characteristics:

1. Compressor and Condenser Unit:

a. Full-Load Cooling Capacity: To be determined and submitted by the contractor with calculations to show selected unit is oversized by a minimum of ½ ton cooling and a minimum of 34,000 BTU heating.

b. Seasonal Energy-Efficiency Ratio (SEER): 16.

c. Heating Seasonal Performance Ratio (HSPF): 9.5.

2. Electrical Characteristics:

a. Volts: 240 V.

b. Phase: 1.

c. Hertz: 60 Hz.

d. Maximum Circuit Ampacity: To be determined by approved product nameplate.

e. Maximum Overcurrent Protection: To be determined by approved product nameplate.

2.3 MOTORS

A. Comply with NEMA designation, temperature rating, service factor, enclosure type, and efficiency requirements for motors.

1. Enclosure Type: Totally enclosed, fan cooled.

2. Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not require motor to operate in service factor range above 1.0.

2.4 SOURCE QUALITY CONTROL

A. Performance Ratings: Certify capacity performance ratings of compressor and condenser units in accordance with AHRI 210/240.

B. Sound-Power Level Ratings: Factory test sound-power-level ratings in accordance with AHRI 270.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install units level and plumb, firmly anchored in locations indicated.

B. Equipment Mounting:

1. Install compressor and condenser units on cast-in-place concrete equipment bases. Comply with requirements for equipment bases and foundations specified in Section 033000 "Cast-In-Place Concrete."

C. Maintain manufacturer's recommended, and IMC 2021 clearances for service and maintenance.

D. Loose Components: Install piping specialties, electrical components, devices, and accessories that are not factory mounted.

3.2 PIPING CONNECTIONS

A. Where installing piping adjacent to equipment, allow space for service and maintenance.

B. Connect refrigerant piping to air-cooled compressor and condenser units; maintain required access to unit. Install furnished field-mounted accessories. Refrigerant piping are specified in 235413 “Electric-Resistance Furnaces.”

1. Install with valves in suction and discharge lines of compressor with service valves for gauge taps at inlet and outlet of hot-gas bypass valves and strainers if they are not an integral part of valves and strainers.

3.3 ELECTRICAL CONNECTIONS

A. Connect wiring in accordance with Section 260519 "Low-Voltage Electrical Power Conductors and Cables."

B. Ground equipment in accordance with Section 260526 "Grounding and Bonding for Electrical Systems."

C. Install electrical devices furnished by manufacturer, but not factory mounted, in accordance with NFPA 70 and NECA 1.

D. Install nameplate for each electrical connection, indicating electrical equipment designation and circuit number feeding connection.

1. Nameplate shall be laminated acrylic or melamine plastic signs with a black background and engraved white letters at least 1/2 inch (13 mm) high.

3.4 CONTROL CONNECTIONS

A. Install control and electrical power wiring to field-mounted control devices.

B. Connect control wiring in accordance with Section 260523 "Control-Voltage Electrical Power Cables."

3.5 FIELD QUALITY CONTROL

A. Perform the following tests and inspections:

1. Perform each visual and mechanical inspection and electrical test. Certify compliance with test parameters.

2. Leak Test: After installation, charge system with refrigerant and oil and test for leaks. Repair leaks, replace lost refrigerant and oil, and retest until no leaks exist.

3. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor operation and unit operation, product capability, and compliance with requirements.

a. Test both heating and cooling operation.

4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

5. Verify manufacturer's required airflow over coils.

B. Compressor and condenser units will be considered defective if they do not pass tests and inspections.

C. Prepare test and inspection reports.

END OF SECTION 236200