Carrier AquaEdge 19DV Series Start-Up, Operation And Maintenance Instructions Manual page 40

CONDENSER
ECONOMIZER
AND LS FLOAT
9
The following procedures assume that system is piped in
agreement with Fig. 39. Use the PIC6 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 different 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
CONDITION O O
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 satu-
ration temperature of 40°F (4.4°C). The chiller water
1B
HS FLOAT
8
1A
COOLER
7
Fig. 39 — Refrigerant Transfer Schematic
2 3 4 5 6 7 8
C O C C O C C
PUMP-OUT WITH STORAGE TANK
PUMP-OUT
COMPRESSOR
2 3
5
4
10
pumps can be turned off (if desired). When vacuum
pressure is fully equalized, close valve 5.
VALVE
CONDITION
e. Open valve 7 and 10 to prepare to let higher pressure
in the recovery tank push liquid refrigerant into the
chiller through the evaporator charging/vacuum
valve.
VALVE
CONDITION
2. Push liquid to chiller; then remove remaining vapor from
9 10
storage tank.
C C
a. Open valve 4.
b. Ensure pumpout condenser water is off; then turn on
the pumpout compressor in manual mode to push liq-
uid to chiller. Monitor the storage tank level until tank
is empty of liquid refrigerant.
c. Close charging valves 7 and 10.
40
RELIEF
VALVE
OIL
SEPARATOR
PUMP-OUT
CONDENSER
CHECK
VALVE
6
STORAGE VESSEL
1A 1B 2 3 4 5
O O C O C C
1A 1B 2 3 4 5
O O C O C C
6 7 8 9 10
O C C C C
6 7 8 9 10
O O C C O