Transfer All Refrigerant To - Carrier 19XR Start-Up, Operation And Maintenance Instructions Manual

Chillers with Isolation Valves
TRANSFER ALL REFRIGERANT TO CHILLER CON-
DENSER VESSEL — For chillers with isolation valves,
refrigerant can be stored in one chiller vessel or the other
without the need for an external storage tank.
1. Push refrigerant into the chiller condenser.
a. Valve positions:
VALVE 1a 1b
CONDITION
b. Using the PIC II controls, turn off the chiller water
pumps and pumpout condenser water. If the chiller
water pumps are not controlled through the PIC II, turn
them off manually.
c. Turn on the pumpout compressor to push the liquid
refrigerant out of the chiller cooler vessel.
d. When all liquid refrigerant has been pushed into
the chiller condenser vessel, close chiller isolation
valve 11.
e. Access the PUMPDOWN LOCKOUT screen on the
PIC II CONTROL TEST table to turn on the chiller
water pumps. If the chiller water pumps are not con-
trolled by the PIC II, turn them on manually.
f. Turn off the pumpout compressor.
2. Evacuate the refrigerant gas from chiller cooler vessel.
a. Close pumpout compressor valves 2 and 5, and open
valves 3 and 4.
VALVE 1a 1b
CONDITION
b. Turn on the pumpout condenser water.
c. Run the pumpout compressor until the chiller cooler
vessel pressure reaches 18 in. Hg vac (40 kPa abs.).
Monitor pressures on the CVC and on refrigerant gages.
d. Close valve 1a.
e. Turn off the pumpout compressor.
f. Close valves 1b, 3, and 4.
VALVE 1a 1b
CONDITION C C
g. Turn off the pumpout condenser water.
h. Proceed to the PUMPDOWN/LOCKOUT function
accessed from the CONTROL TEST table to turn off
the chiller water pumps and lock out the chiller com-
pressor. Turn off the chiller water pumps manually if
they are not controlled by the PIC II.
TRANSFER ALL REFRIGERANT TO CHILLER COOLER
VESSEL
1. Push the refrigerant into the chiller cooler vessel.
a. Valve positions:
VALVE 1a 1b
CONDITION
b. Turn off the chiller water pumps (either through
the PIC II controls or manually, if necessary) and the
pumpout condenser water.
c. Turn on the pumpout compressor to push the refrig-
erant out of the chiller condenser.
d. When all liquid refrigerant is out of the chiller con-
denser, close the cooler isolation valve 11.
e. Turn off the pumpout compressor.
2 3 4 5 8 11 12 13
C C C C C
2 3 4 5 8 11 12 13
C C C C C C
2 3 4 5 8 11 12 13
C C C C C C C C
2 3 4 5 8 11 12 13
C C C C C
2. Evacuate the refrigerant gas from the chiller condenser
vessel.
a. Access the PUMPDOWN LOCKOUT function ac-
cessed from the CVC CONTROL TEST table to turn
on the chiller water pumps. Turn the chiller water pumps
on manually if they are not controlled by the PIC II.
b. Close pumpout unit valves 3 and 4; open valves 2
and 5.
14
VALVE
C
CONDITION
c. Turn on the pumpout condenser water.
d. Run the pumpout compressor until the chiller con-
denser pressure reaches 18 in. Hg vac (40 kPa abs.).
Monitor pressure at the CVC and at refrigerant gages.
e. Close valve 1b.
f. Turn off the pumpout compressor.
g. Close valves 1a, 2, and 5.
VALVE
CONDITION
h. Turn off the pumpout condenser water.
i. Proceed to the PUMPDOWN LOCKOUT test from
the CVC CONTROL TEST table to turn off the chill-
er water pumps and lock out the chiller compressor.
Turn off the chiller water pumps manually if they are
not controlled by the PIC II.
RETURN CHILLER TO NORMAL OPERATING
14
CONDITIONS
C
1. Ensure vessel that was opened has been evacuated.
2. Access the TERMINATE LOCKOUT function CVC from
the CONTROL TEST table to view vessel pressures and
turn on chiller water pumps. If the chiller water pumps
are not controlled by the PIC II, turn them on manually.
3. Open valves 1a, 1b, and 3.
VALVE
CONDITION
4. Slowly open valve 5, gradually increasing pressure in
14
the evacuated vessel to 35 psig (141 kPa). Feed refrig-
C
erant slowly to prevent tube freeze up.
5. Leak test to ensure vessel integrity.
6. Open valve 5 fully.
VALVE
CONDITION
7. Open valve 11 to equalize the liquid refrigerant level
between the vessels.
8. Close valves 1a, 1b, 3, and 5.
9. Open isolation valves 12, 13, and 14 (if present).
VALVE
14
CONDITION
C
10. Proceed to the TERMINATE LOCKOUT screen (ac-
cessed from the CONTROL TEST table) to turn off the
water pumps and enable the chiller compressor for start-
up. If the chiller water pumps are not controlled by the
PIC II, turn them off manually.
64
1a 1b 2 3 4 5 8 11
C C C C
1a 1b 2 3 4 5 8 11
C C C C C C C C
1a 1b 2 3 4 5 8 11
C C C C C
1a 1b 2 3 4 5 8 11
C C C C
1a 1b 2 3 4 5 8 11
C C C C C C C
12 13 14
C C C
12 13 14
C C C
12 13 14
C C C
12 13 14
C C C
12 13 14