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Transfer Refrigerant from Pumpout Storage Tank to Chiller
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.
1.
Equalize refrigerant pressure.
a. Turn on chiller water pumps and monitor chiller pressures.
b. Close pumpout and storage tank valves 2, 4, 5, and 10,
and close refrigerant charging valve 7; open chiller isola-
tion valve 11 and any other chiller isolation valves, if
present.
c. Open pumpout and storage tank valves 3 and 6; open
chiller valves 1a and 1b.
VALVE
1a
1b
2
CONDITION
C
d. Gradually crack open valve 5 to increase chiller pressure
to 35 psig (241 kPa). Slowly feed refrigerant to prevent
freeze-up.
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 charging
valve 7 and storage tank charging valve 10 to let liquid
refrigerant drain into the chiller.
VALVE
1a
1b
2
CONDITION
C
2.
Transfer remaining refrigerant.
a. Close valve 5 and open valve 4. Turn off pumpout con-
denser water, and turn on pumpout compressor in man-
ual mode to push liquid refrigerant out of storage tank.
Monitor the storage tank level until tank is empty.
b. Close refrigerant charging valves 7 and 10.
c. Turn off the pumpout compressor.
d. Turn off the chiller water pumps.
e. Close valves 3 and 4.
f. Open valves 2 and 5.
VALVE
1a
1b
2
CONDITION
g. Turn on pumpout condenser water.
h. Run the pumpout compressor in manual mode until the
storage tank pressure reaches 5 psig (34 kPa), 18 in. Hg
vacuum (41 kPa absolute).
i.
Turn off the pumpout compressor.
j.
Close valves 1a, 1b, 2, 5, and 6.
VALVE
1a
1b
2
CONDITION
C
C
C
k. 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
CONDITION
C
3
4
5
6
7
10
C
C
C
C
3
4
5
6
7
10
C
3
4
5
6
7
10
C
C
C
C
3
4
5
6
7
10
C
C
C
C
C
C
3
4
5
6
7
10
C
C
C
C
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
CONDITION
2.
Transfer the remaining liquid.
a. Turn off pumpout condenser water. Place valves in the
following positions:
VALVE
1A
CONDITION
b. Run the pumpout compressor in automatic mode until
vacuum switch is satisfied and compressor stops. Close
valves 7 and 10.
VALVE
1A
CONDITION
c. Turn off the pumpout compressor.
3.
Remove any remaining refrigerant.
11
a. Turn on chiller water pumps.
b. Turn on pumpout condenser water.
c. Place valves in the following positions:
VALVE
1A
CONDITION
d. Run the pumpout compressor until the chiller pressure
reaches 35 psig (241 kPa); then shut off the pumpout
compressor. Warm chiller condenser water will boil off
any entrapped liquid refrigerant and chiller pressure will
11
rise.
e. When chiller pressure rises to 40 psig (276 kPa), turn on
the pumpout compressor until the pressure again reaches
35 psig (241 kPa); then turn off the pumpout compressor.
Repeat this process until the chiller pressure no longer
rises; then turn on the pumpout compressor and pump
out until the chiller pressure reaches 18 in. Hg vacuum
(41 kPa absolute). This can be done in On or Automatic
mode.
f. Close valves 1a, 1b, 3, 4, and 6.
VALVE
1a
CONDITION
C
g. Turn off the pumpout condenser water.
4.
Establish vacuum for service. To conserve refrigerant,
11
operate the pumpout compressor as described in Step 3e
until the chiller pressure is reduced to 18 in. Hg vacuum
(41 kPa absolute).
This operation can be done in Automatic or On mode. In
Automatic mode, the compressor will stop automatically at
approximately 15 in. Hg vacuum (51 kPa absolute).
CHILLERS WITH ISOLATION VALVES
The valves referred to in the following instructions are shown in
Fig. 33 and 34. Valve 7 remains closed.
11
Transfer All Refrigerant to Chiller Condenser Vessel
1.
Push refrigerant into chiller condenser vessel.
a. Turn on the chiller water pumps and monitor the chiller
pressure.
b. Valve positions:
VALVE
11
CONDITION
c. Equalize refrigerant in the chiller cooler and condenser.
d. Turn off chiller water pumps and pumpout condenser
water supply.
42
1B
2
3
4
5
6
C
C
1B
2
3
4
5
6
C
C
1B
2
3
4
5
6
C
C
1B
2
3
4
5
6
C
C
1b
2
3
4
5
6
C
C
C
C
C
C
1a
1b
2
3
4
C
C
7
10
11
7
10
11
7
10
11
C
C
7
10
11
C
C
7
10
11
C
C
5
11
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