Carrier XRV specifications 19XR Pumpout Unit Wiring Schematic, Optional Pumpout Unit

LEGEND

C— Contactor

FU — Fuse, 3 Amps

HP — High-Pressure Cutout

OL — Compressor Overload T’STAT — Internal Thermostat

Compressor Terminal

Contactor Terminal

Overload Terminal

Pumpout Unit Terminal

*Bimetal thermal protector imbedded in motor winding.

Fig. 35 — 19XR Pumpout Unit Wiring Schematic

OIL RETURN

LINE

CONNECTION

CONDENSER	REFRIGERANT
WATER
	INLET VALVE
CONNECTIONS

Fig. 36 — Optional Pumpout Unit

Chillers with Storage Tanks — If the chiller has iso- lation valves, leave them open for the following procedures. The letter “C” describes a closed valve. See Fig. 17, 18, 29, and 30.

TRANSFER REFRIGERANT FROM PUMPOUT STOR- AGE TANK TO CHILLER

1.Equalize refrigerant pressure.

a.Use the PIC II terminate lockout function on the PUMPDOWN LOCKOUT screen, accessed from

the CONTROL TEST table to turn on the water pumps and monitor pressures.

If the chilled water and condenser water pumps are not controlled by the PIC II, these pumps must be started and stopped manually at the appropriate times during the refrig- erant transfer procedure.

b.Close pumpout unit valves 2, 4, 5, 8, and 10, and close chiller charging valve 7; open chiller isola- tion valves 11, 12, 13, and 14 (if present).

c.Open pumpout unit/storage tank valves 3 and 6, open chiller valves 1a and 1b.

VALVE	1a	1b	2	3	4	5	6	7	8	10	11	12	13	14
CONDITION			C		C	C		C	C	C

Follow Steps d and e carefully to prevent damage from freeze-up.

d.

Slowly open valve 5 to increase chiller pressure to

68 psig 35 psig (141 kPa) for HFC-134a. Feed

refrigerant slowly to prevent freeze up.

e.

Open valve 5 fully after the pressure rises above

the freeze point of the refrigerant. Open liquid line

valves 7 and 10 until refrigerant pressure

equalizes.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

C

C

C

2. Transfer the remaining refrigerant.

a.

Close valve 5 and open valve 4.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

C

C

C

b.

Turn off the chiller water pumps using the CVC/

ICVC (or manually, if necessary).

c.

Turn off the pumpout condenser water, and turn on

the pumpout compressor to push liquid out of the

storage tank.

d.

Close liquid line valve 7.

e.

Turn off the pumpout compressor.

f.

Close valves 3 and 4.

g.

Open valves 2 and 5.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

C

C

C

C

h.

Turn on the pumpout condenser water.

i.

Run the pumpout compressor until the pumpout

storage tank pressure reaches 5 psig (34 kPa)

(18 in. Hg [40 kPa absolute] if repairing the tank).

j.

Turn off the pumpout compressor.

k.

Close valves 1a, 1b, 2, 5, 6, and 10.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

C

C

C

C

C

C

C

C

C

C

l. Turn off pumpout condenser water.

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