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.

69

Page 68 Page 70
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Image 69
Carrier XRV, 19XR specifications Turn off pumpout condenser water, Valve Condition
Page 68 Page 70

19XR, XRV specifications

The Carrier 19XR and 19XRV chillers are sophisticated cooling solutions that represent the forefront of HVAC technology. Designed for large commercial and industrial applications, these chillers provide exceptional performance, energy efficiency, and reliability, making them ideal for a variety of environments ranging from hospitals to manufacturing facilities.

One of the most significant features of the Carrier 19XR and 19XRV chillers is their advanced scroll compressor technology. These units employ a tandem scroll design that enhances efficiency while minimizing operational noise. This makes them ideal for urban environments where noise restrictions may be in place. Moreover, the compressors are equipped with variable speed drive options in the 19XRV model, which allows for greater energy savings by adjusting cooling output based on real-time demand.

In addition to their advanced compressors, the 19XR and 19XRV units incorporate the Carrier GreenChoice refrigerant, which has a lower global warming potential compared to traditional refrigerants. This innovative choice not only meets regulatory requirements but also contributes to sustainability goals, making these chillers a responsible choice for environmentally conscious organizations.

The units are engineered with a robust heat exchanger design, which enhances heat transfer efficiency and overall system performance. This ensures optimal operation even in extreme conditions. They feature a microprocessor-based control system that allows for precise monitoring and control of the chiller’s performance, enabling operators to make real-time adjustments to maximize energy efficiency.

The Carrier 19XR and 19XRV chillers also prioritize serviceability. The design incorporates easy access to key components, simplifying maintenance procedures and reducing downtime. This focus on maintainability extends the lifespan of the equipment, leading to lower lifecycle costs.

In terms of connectivity, these chillers are equipped with advanced Building Management System (BMS) integration capabilities. This allows for seamless monitoring and control of the chillers using a centralized platform, facilitating energy management and operational optimization.

Overall, the Carrier 19XR and 19XRV chillers stand out in the market for their blend of cutting-edge technology, energy efficiency, and user-friendly features. They are engineered to meet the demanding needs of modern commercial and industrial applications, making them a preferred choice for facility managers seeking reliable cooling solutions.
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