Carrier POSITIVE PRESSURE STORAGE SYSTEM 19XB Specifications download pdf (Page 15)

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:

c. Equalize the refrigerant in the chiller cooler and

condenser.

d. Turn off chiller water pumps and pumpout con-

denser 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.

c. Turn on pumpout condenser water.

d. Run the pumpout compressor until the chiller con-

denser reaches 18 in. Hg vacuum (41 kPa abso-

lute) in Manual or Automatic mode. 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.

h. Turn off pumpout condenser water.

i. Turn off chiller water pumps and lock out chiller

compressor.

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.

4. Crack open valve 5, gradually increasing pressure in the

evacuated chiller vessel to 35 psig (241 kPa). Feed refrig-

erant slowly to prevent tube freeze-up.

5. Leak test to ensure chiller vessel integrity.

6. Open valve 5 fully.

7. Close valves 1a, 1b, 3, and 5.

8. Open chiller isolation valve 11 and any other isolation

valves, if present.

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, and

10, and close chiller 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 1a and 1b.

d. Gradually crack open valve 5 to increase chiller

pressure to 35 psig (241 kPa). Slowly feed refrig-

erant 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.

c. Turn on pumpout condenser water.

d. Run the pumpout compressor until the storage

tank pressure reaches 5 psig (34 kPa), 18 in. Hg

vacuum (41 kPa absolute) in Manual or Automatic

mode.

e. Turn off the pumpout compressor.

f. Close valves 1a, 1b, 2, 5, and 6.

g. Turn off pumpout condenser water.

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 recommended

to ensure a proper maintenance schedule is followed.

Pumpout Compressor Oil Charge — Use oil con-

forming to Carrier specifications for centrifugal or screw com-

pressor use. Oil requirements are listed in Table 6.

Monitor and adjust compressor oil level as often as

necessary. When replacing lost oil, add the same type of oil that

is used in the chiller being pumped out.

Table 6 — Pumpout Compressor Oil Requirements

VALVE 1a1b234511

CONDITION C C

VALVE 1a1b234511

CONDITION C C C

VALVE 1a1b234511

CONDITION CCCCCCC

VALVE 1a1b234511

CONDITION C C C C

VALVE 1a1b234511

CONDITION C C C

VALVE 1a1b234511

CONDITION CCCCCC

VALVE 1a1b2345671011

CONDITION C C C C C

VALVE 1a 1b2345671011

CONDITION C C C C

VALVE 1a1b2345671011

CONDITION C C CCCCCC C

REFRIGERANT

ISO

VISCOSITY

CARRIER

SPECIFICATION NO.

R-134a

68 PP47-31

220 PP47-32

1 2 ... 10 11 12 13 14 15 16

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Carrier POSITIVE PRESSURE STORAGE SYSTEM 19XB Specifications Page 15

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