Maintenance, Pumpout unit – Carrier POSITIVE PRESSURE STORAGE SYSTEM 19XB User Manual
Page 15
d. Close valve 1a.
e. Turn off pumpout compressor.
f. Close valves 1b, 3, and 4.
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
C
C
C
C
C
g. Turn off pumpout condenser water.
h. Turn off chiller water pumps and lock out chiller
compressor.
Transfer All Refrigerant to Chiller Cooler Vessel:
1. Push refrigerant into the chiller cooler vessel.
a. Turn on the chiller water pumps and monitor the chiller
pressure.
b. Valve positions:
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
c. Equalize the refrigerant in the chiller cooler and
condenser.
d. Turn off chiller water pumps and pumpout condenser
water.
e. Turn on pumpout compressor to push refrigerant out
of the chiller condenser.
f. When all liquid is out of the chiller condenser, close
valve 11 and any other liquid isolation valves on the
chiller.
g. Turn off the pumpout compressor.
2. Evacuate gas from chiller condenser vessel.
a. Turn on chiller water pumps.
b. Make sure that pumpout valves 3 and 4 are closed and
valves 2 and 5 are open.
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
C
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the chiller con-
denser reaches 18 in. Hg (41 kPa absolute). Monitor
pressure at the chiller control panel and refrigerant gages.
e. Close valve 1b.
f. Turn off pumpout compressor.
g. Close valves 1a, 2, and 5.
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
C
C
C
C
C
h. Turn off pumpout condenser water.
i. Turn off chiller water pumps and lock out chiller com-
pressor.
Return Refrigerant to Normal Operating Conditions
1. Be sure that the chiller vessel that was opened has been
evacuated.
2. Turn on chiller water pumps.
3. Open valves 1a, 1b, and 3.
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
C
C
4. Crack open valve 5, gradually increasing pressure in the
evacuated chiller vessel to 60 psig (414 kPa), [30 psig
(207 kPa)]. Feed refrigerant slowly to prevent tube
freeze-up.
5. Leak test to ensure chiller vessel integrity.
6. Open valve 5 fully.
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
C
7. Close valves 1a, 1b, 3, and 5.
8. Open chiller isolation valve 11 and any other isolation
valves, if present.
VALVE
1a
1b
2
3
4
5
8
11
CONDITION
C
C
C
C
C
C
C
9. Turn off chiller water pumps.
DISTILLING THE REFRIGERANT
1. Transfer the refrigerant from the chiller to the pumpout
storage tank as described in the Transfer the Refrigerant
from Chiller to Pumpout Storage Tank section.
2. Equalize the refrigerant pressure.
a. Turn on chiller water pumps and monitor chiller
pressures.
b. Close pumpout and storage tank valves 2, 4, 5, 8, and
10, and close chiller charging valve 7; open chiller iso-
lation valve 11 and any other chiller isolation valves,
if present.
c. Open pumpout and storage tank valves 3 and 6; open
chiller valves 1a and 1b.
VALVE
1a
1b
2
3
4
5
6
7
8
10
11
CONDITION
C
C
C
C
C
C
d. Gradually crack open valve 5 to increase chiller pres-
sure to 60 psig (414 kPa), [30 psig (207 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.
3. Transfer remaining refrigerant.
a. Close valve 3.
b. Open valve 2.
VALVE
1a
1b
2
3
4
5
6
7
8
10
11
CONDITION
C
C
C
C
C
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the storage tank
pressure reaches 5 psig (34 kPa), 18 in. Hg (41 kPa
absolute).
e. Turn off the pumpout compressor.
f. Close valves 1a, 1b, 2, 5, and 6.
g. Turn off pumpout condenser water.
VALVE
1a
1b
2
3
4
5
6
7
8
10
11
CONDITION
C
C
C
C
C
C
C
C
C
C
4. Drain the contaminants from the bottom of the storage
tank into a container. Dispose of contaminants safely.
MAINTENANCE
Periodic maintenance is necessary to keep all components
functioning as designed. A maintenance log is recom-
mended to ensure a proper maintenance schedule is
followed.
Pumpout Unit —
For maintenance details, refer to the
06D, 07D Installation, Start-Up, and Service Instructions.
15