Carrier AquaEdge 19DV series Start-Up, Operation And Maintenance Instructions Manual page 39

CONDENSER
ECONOMIZER
AND LS FLOAT
9
The following procedures assume that system is piped in
agreement with Fig. 38. Use the PIC5 Pumpdown/Lockout fea-
ture under the Maintenance menu.
NOTE: Instructions assume pumpout unit with four control
valves oriented as shown. Actual equipment may have a differ-
ent design, in which case the procedure changes.
Transfer Refrigerant from Storage Tank Vessel to Chiller
1. Equalize refrigerant pressure.
a. Turn on chiller water pumps, establishing water
flow (assumes vacuum condition in chiller system)
b. Open (O) and close (C) pumpout and storage tank
valves according to below table.
VALVE 1A 1B 2
CONDITION O O C
c. Gradually open valve 5 to allow vapor pressure to
equalize between storage tank and chiller system.
d. Open valve 5 fully after the chiller pressure
exceeds -12.7 in. Hg (58.3 kPa abs) corresponding
to a saturation temperature of 40°F (4.4°C). The
chiller water pumps can be turned off (if desired).
1B
HS FLOAT
8
1A
COOLER
7
Fig. 38 — Refrigerant Transfer Schematic
3 4 5 6 7 8 9 10
O C C O C C C
PUMP-OUT WITH STORAGE TANK
PUMP-OUT
COMPRESSOR
2 3
5
4
6
10
When vacuum pressure is fully equalized, close
valve 5.
VALVE
CONDITION
e. Open valve 7 and 10 to prepare to let higher pres-
sure in the recovery tank push liquid refrigerant
into the chiller through the cooler charging/vac-
uum valve.
VALVE
CONDITION
2. Push liquid to chiller; then remove remaining vapor from
storage tank;
a. Open valve 4.
C
b. Ensure pumpout condenser water is off; then turn
on the pumpout compressor in manual mode to
push liquid to chiller. Monitor the storage tank
level until tank is empty of liquid refrigerant.
c. Close charging valves 7 and 10.
39
RELIEF
VALVE
OIL
SEPARATOR
PUMP-OUT
CONDENSER
CHECK
VALVE
STORAGE VESSEL
1A 1B 2 3 4 5 6
O O C O C C O
1A 1B 2 3 4 5 6
O O C O C C O
7 8 9 10
C C C C
7 8 9 10
O C C O