Fig. 10 Ð Valve Locations for 19XB Pumpout Unit With 19XB Storage Tank
e. Open valve 5 fully after the chiller pressure rises above the freezing point of the refrigerant. Let the storage tank and chiller pressure equalize. Open refrigerant charg- ing valve 7 and storage tank charging valve 10 to let liquid refrigerant drain into the chiller.
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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2. Transfer remaining refrigerant.
a. Close valve 5 and open valve 4.
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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b. Turn off the pumpout condenser water, and turn on the pumpout compressor to push liquid refrigerant out of the storage tank. Monitor the storage tank level until the tank is empty.
c. Close refrigerant charging valves 7 and 10. d. Turn off the pumpout compressor.
e. Turn off the chiller water pumps. f. Close valves 3 and 4.
g. Open valves 2 and 5.
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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h. Turn on pumpout condenser water.
i. Run the pumpout compressor until the storage tank pres- sure reaches 5 psig (34 kPa), 18 in. Hg (41 kPa absolute).
j. Turn off the pumpout compressor.
k. Close valves 1a, 1b, 2, 5, and 6.
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION | C | C | C | C | C | C | C | C | C | C |
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l. Turn off pumpout condenser water.
Transfer the Refrigerant from Chiller to Pumpout Storage Tank.
1. Equalize refrigerant pressure. a. Valve positions:
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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b. Slowly open valve 5 and refrigerant charging valves 7 and 10 to allow liquid refrigerant to drain by gravity into the storage tank.
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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2. Transfer the remaining liquid.
a. Turn off pumpout condenser water. Place valves in the following positions:
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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b. Run the pumpout compressor for approximately 30 min- utes, then close valve 7 and 10.
VALVE | 1a | 1b | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 11 |
CONDITION |
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c. Turn off the pumpout compressor.
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