Quantech QCC3, Manual

Page: 53 / 60

FORM QCC3-EG1 (517)
QUANTECH 53
Guide Specifications (Cont'd)
PART 2 - PRODUCTS
2.01 CONDENSING UNITS MATERIALS AND COMPONENTS
A. General: Install and commission, as shown on the schedules and plans, factory as-
sembled, charged, and tested air cooled scroll compressor condensing unit as speci-
fied herein. Condensing Unit shall be designed, selected, and constructed using a
refrigerant with Flammability rating of “1”, as defined by ANSI/ASHRAE STANDARD
- 34 Number Designation and Safety Classification of Refrigerants. Condensing Unit
shall include, but is not limited to: not less than two refrigerant circuits, scroll com-
pressors, air-cooled condenser, refrigerant, lubrication system, interconnecting wiring,
safety and operating controls including capacity controller, control center, motor start-
ing components, and special features as specified herein or required for safe, auto -
matic operation.
B. Cabinet: External structural members shall be constructed of heavy gauge, galvanized
steel coated with baked on powder paint which, when subject to ASTM B117, 1000
hour, 5% salt spray test, yields minimum ASTM 1654 rating of “6”.
2.02 COMPRESSORS
Compressors: Shall be hermetic, scroll-type, including:
1. Compliant design for axial and radial sealing.
2. Refrigerant flow through the compressor with 100% suction cooled motor.
3. Large suction side free volume and oil sump to provide liquid handling capability.
4. Compressor crankcase heaters to provide extra liquid migration protection.
5. Annular discharge check valve and reverse vent assembly to provide low pressure
drop, silent shutdown and reverse rotation protection.
6. Initial Oil charge.
7. Oil Level sightglass.
8. Vibration isolator mounts for compressors.
9. Brazed-type connections for fully hermetic refrigerant circuits.
2.03 REFRIGERANT CIRCUIT
Two independent refrigerant circuits will be furnished on each unit. All unit piping will be
copper, with brazed joints. The liquid line will include a field connection shutoff valve with
charging port located on each condenser circuit. Suction line connections are provided
on each refrigeration circuit. Filter drier and sight glass are shipped loose for field instal-
lation on each refrigerant circuit. All expansion valves and liquid line solenoid valves and
refrigerant field piping are supplied by others.