Carrier 19XRV Start-Up, Operation And Maintenance Instructions Manual page 72

FRAME
ASSEMBLY
CONTROL
PANEL
VALVE
2_
VALVE
4_
VALVE /
5
ENTERING
WATER
_COMPRESSOR
/ OIL
SEPARATOR
LEAVING CONDENSER
WATER
Fig. 40 -- Pumpout Unit
Transfer Refrigerant fiOl]l Pumpout Storage Tank to Chiller
c. Turn off tile pumpout compressor.
d. Turn off the chiller water pumps.
e. Close valves 3 and 4.
f. Open valves 2 and 5.
VALVE la lb 2 3 4 5 6 7 10 11
CONDITION C C C C
g. Turn on pumpout condenser watec
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 I a, I b, 2, 5, and 6.
VALVE la lb 2 3 4 5 6 7 10 11
CONDITION C C C C C C C C C
k. Turn off pumpout condenser watel:
Transfer the Refrigerant from Chiller to Pumpout Storage
Tank
1. Equalize refrigerant pressure.
a. Valve positions:
During transfer of refrigerant into and out of the 19XR
storage tank, carelhlly monitor the storage tank level gage.
Do not fill the tank more than 90% of capacity to allow for
refrigerant expansion. Overfilling may result in &image to
the tank and personal injury.
Equ_dize refligerant 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
isolation valves, if present.
c. Open pumpout and storage tank valves 3 and 6;
open chiller valves la and lb.
VALVE la lb 2 3 4 5 6 7 10 11
CONDITION C C C C C
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. Open
refrigerant charging valve 7 and storage tank
charging valve 10 to let liquid refrigerant drain into
the chiller.
VALVE ]la lb 2 3 4 5 6 7 10 11
CONDITION
2. Transfer remaining refrigerant.
VALVE 11
CONDITION
a. Close valve 5 and open valve 4. Turn off the
pumpout condenser water, and turn on the
pumpout compressor in manual mode to push
liquid refrigerant out of the storage tank. Monitor
the storage tank level until the tank is empty.
b. Close refrigerant charging valves 7 and 10.
VALVE la lb 2 3 4 5 6 7 10 11
CONDITION C C C C C
b. Slowly open wflve 5 and refrigerant charging
valves 7 and 10 to allow liquid refrigerant to drain
by gravity into the storage tank.
VALVE 11
CONDITION
2. Transfer the remaining liquid.
a. Turn off pumpout condenser water. Place valves in
the following positions:
VALVE 11
CONDITION
b. Run the pumpout compressor in automatic mode
until vacuum switch is satisfied and compressor
stops. Close valves 7 and 10.
VALVE la lb 2 3 4 5 6 7 10 11
CONDITION C C C C
c. Turn off the pumpout compressor.
3. Remove any remaining refrigerant.
a. Turn on chiller water pumps.
b. Turn on pumpout condenser watec
c. Place valves in the following positions:
Run the pumpout compressor until the chiller pres-
sure reaches 35 psig (241 kPa); then, shut off the
pumpout compressor. Warm chiller condenser
water will boil off any entrapped liquid refrigerant
and chiller pressure will rise.
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 pressure no longer rises; then, turn on the
pumpout compressor and pump out until the chiller
pressure reaches 18 in. Hg vacuum (41 kPa abso-
lute). This can be done in On or Automatic mode.
72