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b. Run the pumpout compressor for 30 minutes then close valve 7.
c. Turn off the pumpout compressor.
3. Remove any remaining refrigerant.
a. Turn on water pumps through the use of the Control Test Pumpdown.
b. Turn on pumpout condenser water.
c. Place valves in the following positions:
d. Run the pumpout compressor until the machine pressure reaches 65 psig (448 kPa) for
HCFC-22, 30 psig (207 kPa) for HFC-134a, then shut off the pumpout. Warm condenser
water will boil off any entrapped liquid refrigerant and machine pressure will rise.
e. When the pressure rises to 70 psig (483 kPa) for HCFC-22, 40 psig (276 kPa) for
HFC-134a, turn on the pumpout compressor until the pressure again reaches 65 psig
Valve
1a 1b 2 3 4 5 6 7 8 11 12 13 14
Condition
CC CC
Valve
1a 1b 2 3 4 5 6 7 8 11 12 13 14
Condition
CCCC