13
Fig. 9 — Pumpout Unit
Transfer Refrigerant from Storage Tank Vessel to Chiller
1. Equalize refrigerant pressure.
a. Turn on chiller water pumps, establishing water flow
(assumes vacuum condition in chiller system).
b. Close pumpout and storage tank valves 2, 4, 5, 7, 8, 10
(if present open isolation valve 11 and other isolation
valves between cooler and condenser). Open storage
tank valve 6; open chiller valves 1A and 1B.
c. Gradually open valve 5 to slowly increase chiller pres-
sure to 35 psig (241 kPa) to reduce the potential of tube
freeze up.
d. Open valve 5 fully after the chiller pressure reaches
35 psig (241 kPa) or greater. Let chiller pressure reach
40 psig (276 kPa), then chiller water pumps can be
turned off. Fully close valve 5.
e. Open valve 8 and 10 to let higher pressure in the recov-
ery tank push liquid refrigerant into the condenser float
chamber and heat exchangers until the refrigerant pres-
sure equalizes between the recovery tank and chiller.
2. Push liquid to chiller, them remove remaining vapor from
storage tank:
a. To prepare for liquid, push open valve 4.
b. Ensure pumpout condenser water is off, then turn on the
pumpout compressor in manual mode to push liquid to
chiller. Monitor the storage tank level until tank is empty
of liquid refrigerant.
c. Close charging valves 8 and 10.
d. Turn off the pumpout compressor.
e. To prepare for removal of remaining refrigerant vapor in
storage tank, close pumpout valves 3 and 4 and open
valves 2 and 5.
f. Turn on pumpout condenser water.
g. Run pumpout unit in auto until the vacuum switch is sat-
isfied. This occurs approximately at 15 in Hg vacuum
(48 kPa absolute or 7 psia), removing the residual refrig-
erant vapor from the recovery tank and condensing to a
liquid in the chiller.
h. Close valves 1A, 1B, 2, 5, 6.
i. Turn off pumpout condenser water.
Transfer Refrigerant from Chiller to Storage Tank Vessel
1. Equalize refrigerant pressure.
a. Dehydrate the refrigerant storage vessel, and connected
hoses/piping so there are no non-condensables mixed
with the refrigerant.
b. Locate valves as identified below:
c. Slowly open valve 5 until the refrigerant pressure
reaches 35 psig (241 kPa) in the storage tank, followed
by valves 7 and 10 to allow liquid refrigerant to drain by
gravity.
OIL FILL 1/4-IN. FLARE VALVE
FRAME
ASSEMBLY
CONTROL
PANEL
VALVE 2
VALVE 4
VALVE 5
VALVE 3
ENTERING
WATER
LEAVING
WATER CONDENSER
OIL
SEPARATOR
OIL
HEATER
COMPRESSOR
WARNING
During transfer of refrigerant into and out of the 19XR storage
tank, carefully monitor the storage tank level gage. Do not fill
the tank more than 90% of capacity to allow for refrigerant
expansion. Overfilling may result in damage to the tank and
personal injury.
VALVE 1A 1B 2 3 4 5 6 7 8 10 11
CONDITION CCCCCC
VALVE 1A1B23456781011
CONDITION C C C C C C
VALVE 1A1B23456781011
CONDITION C C C C
VALVE 1A1B23456781011
CONDITION C C C
VALVE 1A1B23456781011
CONDITION C C C C C
VALVE 1A1B23456781011
CONDITIONCCCCCCCCCC
VALVE 1A1B23456781011
CONDITION C C C C C C
VALVE 1A1B23456781011
CONDITION C C C
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