35
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
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:
c. Equalize refrigerant in the chiller cooler and condenser.
d. Turn off chiller water pumps and pumpout condenser
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 con-
denser 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.
b. Turn on pumpout condenser water.
c. Run pumpout compressor until the chiller cooler ves-
sel pressure reaches 18 in. Hg vacuum (41 kPa abso-
lute). 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 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 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 on page 34.
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 pres-
sure 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.
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
C
C
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
C
C
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
VALVE
1A
1B
2
3
4
5
11
CONDITION
C
C
C
C
C
C
VALVE
1A
1B
2
3
4
5
6
7
10
11
CONDITION
C
C
C
C
C
Summary of Contents for AquaEdge 19MV
Page 49: ...49 Fig 46 SIOB...
Page 50: ...50 Fig 47 IOB2...
Page 51: ...51 Fig 48 19MV Auxiliary Controls Wiring...
