Carrier AquaEdge 19XR Series Start-Up, Operation And Maintenance Instructions Manual page 44

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 ex-
pansion. Overfilling may result in damage to the tank and per-
sonal 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 isolation valve 11 and any other chiller isola-
tion 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 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. 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
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 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
3 4 5 6 7 10
C
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.
a. Turn on chiller water pumps.
b. Turn on pumpout condenser water.
c. Place valves in the following positions:
VALVE 1A
11
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 pres-
sure will 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 pres-
sure no longer rises; then turn on the pumpout com-
11
pressor 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,
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
11
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. 40 and 41. Valve 7 remains closed.
Transfer All Refrigerant to Chiller Condenser Vessel
1. Push refrigerant into chiller condenser vessel.
a. Turn on the chiller water pumps and monitor the
11
chiller pressure.
b. Valve positions:
VALVE
CONDITION
c. Equalize refrigerant in the chiller cooler and condenser.
d. Turn off chiller water pumps and pumpout condenser
11
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).
11
g. Turn on the chiller water pumps.
44
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
C C
7 10 11
C C
7 10 11
C C
5 11