Carrier 30XW325-400 User Manual

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Size Range: 325 to 400 Nominal Tons

Carrier Model Number: 30XW
Part 1 — General
1.01 SYSTEM DESCRIPTION

Microprocessor controlled water-cooled liquid chiller
utilizing screw compressors and electronic expan-
sion valves.

1.02 QUALITY ASSURANCE

A. Unit shall be rated in accordance with AHRI Stan-

dard 550/590 (U.S.A.), latest edition. 

B. Unit construction shall comply with ASHRAE 15

Safety Code, NEC, and ASME applicable codes
(U.S.A. codes).

C. Unit shall be manufactured in a facility registered to

ISO 9001:2000 Manufacturing Quality Standard.

D. 200-v, 230-v, 460-v, 575-v, 60 Hz units shall be

constructed in accordance with UL or UL Canada
standards and shall be tested and listed by ETL or
ETL, Canada, as conforming to those standards.
Units shall carry the ETL and ETL, Canada, labels.

1.03 DELIVERY, STORAGE, AND HANDLING

A. Unit controls shall be capable of withstanding 150 F

(65.5 C) storage temperatures in the control
compartment.

B. Chiller and starter should be stored indoors, pro-

tected from construction dirt and moisture. An
inspection should be conducted under shipping
tarps, bags, or crates to be sure water has not col-
lected during transit. Protective shipping covers
should be kept in place until machine is ready for
installation. The inside of the protective cover
should meet the following criteria:

1. Temperature is between 40 F (4.4 C) and

120 F (48.9 C).

2. Relative humidity is between 10% and 80%

(non-condensing).

Part 2 — Products
2.01 EQUIPMENT

A. General:

Factory assembled, single-piece, water-cooled liquid
chiller with dual (2) independent refrigerant circuits.
Contained within the unit cabinet shall be all factory
wiring, piping, controls, refrigerant charge (HFC-
134a) and special features required prior to field
start-up.

B. Compressors:

1. Semi-hermetic twin-screw compressors with

internal muffler and check valve.

2. Each compressor shall be equipped with a dis-

charge shutoff valve.

C. Evaporator:

1. Shall be tested and stamped in accordance

with ASME Code (U.S.A.) for a refrigerant
working-side pressure of 220 psig (1408 kPa).
Water-side pressure rating shall be 150 psig
(1034 kPa). In Canada, maximum water-side
pressure shall be 250 psig (1725 kPa), per the
Canadian National Registry.

2. Shall be mechanically cleanable shell-and-tube

type with removable heads.

3. Tubes shall be internally enhanced, seamless-

copper type, and shall be rolled into tube
sheets.

4. Shall be equipped with victaulic fluid

connections.

5. Shell shall be insulated with 

3

/

4

-in. (19-mm)

closed-cell, polyvinyl chloride foam with a maxi-
mum K factor of 0.28. Heads may require field
insulation.

6. Shall have a evaporator drain and vent.
7. Design shall incorporate 2 independent refrig-

erant circuits.

8. Shall include isolation valves to allow isolation

of the refrigerant charge in either the evapora-
tor or the condenser.

9. Shall be equipped with factory-installed thermal

dispersion chilled fluid flow switch.

D. Condenser:

1. Shall be tested and stamped in accordance

with ASME code (U.S.A.) for a refrigerant
working-side pressure of 220 psig (1408 kPa).
Water-side pressure rating shall be 150 psig
(1034 kPa). In Canada, maximum water-side
pressure shall be 250 psig (1725 kPa), per the
Canadian National Registry.

2. Shall be mechanically cleanable shell-and-tube

type with removable heads.

3. Tubes shall be internally enhanced, seamless-

copper type, and shall be rolled into tube
sheets.

4. Shall be equipped with victaulic water

connections.

5. Design shall incorporate 2 independent refrig-

erant circuits.

E. Heat Machines:

1. Condenser shall be tested and stamped in

accordance with ASME Code (U.S.A.) for a
refrigerant working-side pressure of 300 psig
(2068 kPa).

2. Design shall incorporate 2 independent refrig-

erant circuits.

3. Heat machine condensers shall include factory-

installed thermal insulation on the condenser,
condenser flow switch and leaving water
temperature sensor. Heat machine units
require field-installed thermal insulation on the