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e. Turn on pumpout compressor to push liquid out of the
chiller cooler vessel.
f. When all liquid has been pushed into chiller condenser
vessel, close the cooler refrigerant isolation valve (11).
g. Turn on the chiller water pumps.
h. Turn off the pumpout compressor.
2.
Evacuate gas from chiller cooler vessel.
a. Close liquid line service valves 2 and 5; open valves 3
and 4.
VALVE
1a
CONDITION
b. Turn on pumpout condenser water.
c. Run pumpout compressor until the chiller cooler vessel
pressure reaches 18 in. Hg vacuum (41 kPa absolute).
Monitor pressures on the chiller control panel and on
refrigerant gages. This operation can be done in Auto-
matic or On mode. In Automatic mode, the compressor
will stop automatically at approximately 15 in. Hg vac-
uum (51 kPa absolute).
d. Close valve 1a.
e. Turn off pumpout compressor.
f. Close valves 1b, 3, and 4.
VALVE
1a
CONDITION
C
g. Turn off pumpout condenser water.
h. Turn off chiller water pumps and lock out chiller
compressor.
Transfer All Refrigerant to Chiller Cooler Vessel
1.
Push refrigerant into the chiller cooler vessel.
a. Turn on the chiller water pumps and monitor the chiller
pressure.
b. Valve positions:
VALVE
1a
CONDITION
c. Equalize refrigerant in the chiller cooler and condenser.
d. Turn off chiller water pumps and pumpout condenser
water.
e. Turn on pumpout compressor to push refrigerant out of
the chiller condenser.
f. When all liquid is out of chiller condenser, close valve 11
and any other liquid isolation valves on the chiller.
g. Turn off the pumpout compressor.
2.
Evacuate gas from chiller condenser vessel.
a. Turn on chiller water pumps.
b. Make sure that liquid line service valves 3 and 4 are
closed and valves 2 and 5 are open.
VALVE
1a
CONDITION
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the chiller condenser
reaches 18 in. Hg vacuum (41 kPa absolute) in Manual
or Automatic mode. Monitor pressure at the chiller con-
trol panel and refrigerant gages.
e. Close valve 1b.
f. Turn off pumpout compressor.
g. Close valves 1a, 2, and 5.
VALVE
1a
CONDITION
C
1b
2
3
4
5
C
C
1b
2
3
4
5
C
C
C
C
C
1b
2
3
4
5
C
C
1b
2
3
4
5
C
C
1b
2
3
4
5
C
C
C
C
C
h. Turn off pumpout condenser water.
i. Turn off chiller water pumps and lock out chiller
compressor.
Return Refrigerant to Normal Operating Conditions
1.
Ensure that opened chiller vessel has been evacuated.
2.
Turn on chiller water pumps.
3.
Open valves 1a, 1b, and 3.
VALVE
CONDITION
11
4.
Crack open valve 5, gradually increasing pressure in the
C
evacuated chiller vessel to 35 psig (241 kPa). Feed refrig-
erant slowly to prevent tube freeze-up.
5.
Leak test to ensure chiller vessel integrity.
6.
Open valve 5 fully.
VALVE
CONDITION
7.
Close valves 1a, 1b, 3, and 5.
8.
Open chiller isolation valve 11 and any other isolation
valves, if present.
VALVE
CONDITION
9.
Turn off chiller water pumps.
11
DISTILLING THE REFRIGERANT
C
1.
Transfer the refrigerant from the chiller to the pumpout
storage tank as described in the Transfer the Refrigerant
from Chiller to Pumpout Storage Tank section on page 42.
2.
Equalize the 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 chiller charging valve 7; open chiller isolation
valve 11 and any other chiller isolation valves, if present.
c. Open pumpout and storage tank valves 3 and 6; open
11
chiller valves 1a and 1b.
VALVE
CONDITION
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.
3.
Transfer remaining refrigerant.
a. Close valve 3.
b. Open valve 2.
VALVE
CONDITION
11
C
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the storage tank pres-
sure reaches 5 psig (34 kPa), 18 in. Hg vacuum (41 kPa
absolute) in Manual or Automatic mode.
e. Turn off the pumpout compressor.
f. Close valves 1a, 1b, 2, 5, and 6.
g. Turn off pumpout condenser water.
VALVE
CONDITION
11
4.
Drain the contaminants from the bottom of the storage
C
tank into a container. Dispose of contaminants safely.
43
1a
1b
2
3
C
1a
1b
2
3
C
1a
1b
2
3
C
C
C
C
1a
1b
2
3
4
5
C
C
C
1a
1b
2
3
4
5
C
C
1a
1b
2
3
4
5
C
C
C
C
C
C
4
5
11
C
C
C
4
5
11
C
C
4
5
11
C
C
6
7
10
11
C
C
6
7
10
11
C
C
6
7
10
11
C
C
C
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