Specifications

94
c. Equalize the refrigerant in the chiller cooler and
condenser.
d. Turn off chiller water pumps and pumpout con-
denser water supply.
e. Turn on pumpout compressor to push liquid out of
the chiller cooler vessel.
f. When all liquid has been pushed into the chiller
condenser vessel, close the cooler refrigerant isola-
tion 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.
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 Automatic or On
mode. In Automatic mode, the compressor will
stop automatically at approximately 15 in. Hg
vacuum (51 kPa absolute).
d. Close valve 1a.
e. Turn off pumpout compressor.
f. Close valves 1b, 3, and 4.
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:
c. Equalize the refrigerant in the chiller cooler and
condenser.
d. Turn off chiller water pumps and pumpout con-
denser water.
e. Turn on pumpout compressor to push refrigerant
out of the chiller condenser.
f. When all liquid is out of the 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.
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the chiller con-
denser reaches 18 in. Hg vacuum (41 kPa absolute)
in Manual or Automatic mode. Monitor pressure at
the chiller control panel and refrigerant gages.
e. Close valve 1b.
f. Turn off pumpout compressor.
g. Close valves 1a, 2, and 5.
h. Turn off pumpout condenser water.
i. Turn off chiller water pumps and lock out chiller
compressor.
Return Refrigerant to Normal Operating Conditions
1. Be sure that the chiller vessel that was opened has been
evacuated.
2. Turn on chiller water pumps.
3. Open valves 1a, 1b, and 3.
4. Crack open valve 5, gradually increasing pressure in the
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.
7. Close valves 1a, 1b, 3, and 5.
8. Open chiller isolation valve 11 and any other isolation
valves, if present.
9. Turn off chiller water pumps.
DISTILLING THE REFRIGERANT
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.
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 chiller valves 1a and 1b.
d. Gradually crack open valve 5 to increase chiller
pressure to 35 psig (241 kPa). Slowly feed refriger-
ant 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.
VALVE 1a1b234511
CONDITION C C C
VALVE 1a1b234511
CONDITION CCCCCCC
VALVE 1a1b234511
CONDITION C C
VALVE 1a1b234511
CONDITION C C C
VALVE 1a1b234511
CONDITION CCCCCCC
VALVE 1a1b234511
CONDITION C C C C
VALVE 1a1b234511
CONDITION C C C
VALVE 1a1b234511
CONDITION CCCCCC
VALVE 1a1b2345671011
CONDITION C C C C C