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2. Transfer remaining refrigerant.
a. Close valve 5 and open valve 4.
VALVE 1a1b23456781011121314
CONDITION CCC
b. Turn off the chiller water pumps through the LID.
c. Turn off the pumpout condenser water, and turn on the
pumpout compressor to push liquid out of the storage
tank.
d. Close liquid line valve 7.
e. Turn off the pumpout compressor.
f. Close valves 3 and 4.
g. Open valves 2 and 5.
VALVE 1a 1b 2 3 4 5 6 7 8 10 11 12 13 14
CONDITION CC CC
h. Turn on pumpout condenser water.
i. Run the pumpout compressor until the storage tank
pressure reaches 5 psig (34 kPa) (18 in. Hg [40 kPa
absolute] if repairing the tank).
j. Turn off the pumpout compressor.
k. Close valves 1a, 1b, 2, 5, 6, and 10.
VALVE 1a1b23456781011121314
CONDITION C C CCCCCCCC
l. Turn off pumpout condenser water.
TRANSFER THE REFRIGERANT FROM CHILLER TO
STORAGE TANK
1. Equalize refrigerant pressure.
a. Valve positions:
VALVE 1a1b23456781011121314
CONDITION CCCCCC
b. Slowly open valve 5 and liquid line valves 7 and 10
to allow liquid refrigerant to drain by gravity into the
pumpout storage tank.
VALVE 1a1b23456781011121314
CONDITION CC C
2. Transfer the remaining liquid.
a. Turn off pumpout condenser water. Place valves in the
following positions:
VALVE 1a1b2345678101121314
CONDITION CC C
b. Run the pumpout compressor for approximately30 min-
utes; then, close valve 10.
VALVE 1a1b23456781011121314
CONDITION CC CC
c. Turn off the pumpout compressor.
3. Remove any remaining refrigerant.
a. Turn on chiller water pumps using the Control Test
Pumpdown.
b. Turn on pumpout condenser water.
c. Place valves in the following positions:
VALVE 1a1b23456781011121314
CONDITION CCCC
d. Run the pumpout compressor until the chiller pres-
sure reaches 65 psig (448 kPa) [30 psig (207 kPa)],
then shut off the pumpout compressor. Warm con-
denser water will boil off any entrapped liquid refrig-
erant and chiller pressure will rise.
e. When the pressure rises to 70 psig (483 kPa) [40 psig
(276 kPa)], turn on the pumpout compressor until the
pressure again reaches 65 psig (448 kPa) [30 psig
(207 kPa)], and then turn off the compressor. Repeat
this process until the pressure no longer rises, then
turn on the pumpout compressor and pump out until
the pressure reaches 18 in. Hg (40 kPa absolute).
f. Close valves 1a, 1b, 3, 4, 6, and 7.
VALVE 1a1b23456781011121314
CONDITION C C CCCCCCCC
g. Turn off the pumpout condenser water and continue
with the Control Test for Pumpdown, which will lock
out the chiller compressor for operation.
4. Establish vacuum for service.
a. In order to conserve refrigerant, operate the pump-
out compressor until the chiller pressure is reduced to
18 in. Hg vac, ref 30 in. bar. (40 kPa abs.) following
Step 3e.
Chillers with Isolation Valves
TRANSFER ALL REFRIGERANT TO CHILLER CON-
DENSER VESSEL — For chillers with isolation valves, re-
frigerant can be transferred from one chiller vessel to another
without the need for an external storage tank and valve 7
stays closed. See Fig. 27, 28, and 35 for valve locations.
1. Push refrigerant into chiller condenser.
a. Valve positions:
VALVE 1a 1b 2 3 4 5 8 11 12 13 14
CONDITION CC C CCC
b. Turn off chiller water pumps and pumpout unit con-
denser water.
c. Turn on pumpout compressor to push liquid out of the
cooler/compressor.
d. When all liquid has been pushed into the condenser,
close cooler isolation valve 11.
e. Access the Control Test, Pumpdown table on the LID
display to turn on the chiller water pumps.
f. Turn off the pumpout compressor.
2. Evacuate gas from cooler/compressor vessel.
a. Close pumpout valves 2 and 5, and open valves 3
and 4.
VALVE 1a 1b 2 3 4 5 8 11 12 13 14
CONDITION C CCCCCC
b. Turn on pumpout condenser water.
c. Run pumpout until the compressor reaches 18 in. Hg
vac (40 kPa abs.). Monitor pressures on the LID and
on refrigerant gages.
d. Close valve 1a.
e. Turn off pumpout compressor.
f. Close valves 1b, 3, and 4.
VALVE 1a1b2345811121314
CONDITION C C CCCCCC C C C
g. Turn off pumpout condenser water.
h. Proceed to Pumpdown test on the LID to turn off chiller
water pumps and lock out chiller compressor.
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