Carrier 30GTN User Manual download pdf (Page 2)

Date: Supersedes:

30GTN,GUN040-110

COMFORTLINK™ CONTROLS

AIR-COOLED CHILLERS

30GTN,GUN Rev.:

JOB NAME: LOCATION:

BUYER: BUYER P.O. # CARRIER #

UNIT NUMBER: MODEL NUMBER:

PERFORMANCE DATA CERTIFIED BY: DATE:

DESCRIPTION

These air-cooled package chillers are factory piped, wired and charged with HCFC-22 (30GUN

and 30GUR units are charged with HFC-134a). Rugged, weatherproof construction and compact

design make them ideal for rooftop or ground level installation. Upward discharge airﬂow mini-

mizes directional sound and dissipates heat away from surrounding areas.

FEATURES

Standard one-year warranty (U.S.A. and Canada only).

Multiple reciprocating serviceable-hermetic compressors mounted on spring

isolated rails. Automatically reversible oil pump, thermal overload protec-

tion, suction and discharge service valves.

Calibrated, ambient compensated magnetic-trip circuit breakers with manual

reset provide single-phase and phase-reversal protection.

Insert-type 180-watt crankcase heaters.

High- and low-pressure safety switches.

Dual refrigerant circuits. Each refrigerant circuit contains: Hot gas mufﬂer

for each compressor, excessive pressure relief device, liquid line shut-off

valve, replaceable-core ﬁlter drier, moisture indicating sight glass, loss of

oil pressure protection.

Electronic expansion valve in each refrigeration circuit.

Automatic lead-lag feature automatically alternates the lead circuits to

ensure even cycles and run time.

Single point main power connection.

Compressor timed pumpdown cycle at start-up and stopping of each refrig-

eration circuit cooling cycle.

Unit capable of starting with up to 95° F (35° C) water entering the cooler,

with 125° F (52° C) outdoor air.

Units equipped with electronic expansion valves are capable of starting

and operating down to 0° F (18° C) outside-air temperatures with wind

baffles installed. Below 0° F (18° C) outside-air temperature, the unit must

be modiﬁed for low-ambient operation. Below 32° F (0° C), unit must be

equipped with wind baffles.

Low water ﬂow detection provided by internal control devices.

Proof of ﬂow switches recommended.

Control capacity based on leaving-water temperature, compensated by return-

water temperature.

Cooler ﬂow may be either constant or variable.

Provisions can be made for reset by either outdoor, space, or return-water

temperature.

Clear language scrolling marquee alphanumeric diagnostic display and set

point panel for set points, service diagnostics and operational quick tests.

Integral shell-and-tube cooler with dual refrigerant circuits, expanded poly-

vinyl chloride insulation (and electric heater cable for freeze protection)

optional.

Non-ferrous condenser coils with mechanically bonded plate ﬁns and

integral subcooling circuit.

Direct-drive condenser fans and motors are supported by a formed-wire

mount to reduce vibration.

Fan motors are three-phase with permanently lubricated ball bearings and

inherently protected.

Multiple fans are used for head pressure control during intermediate

season.

Unit can be equipped (accessory) with an energy management module for

load shedding, demand limiting or reset via 4 to 20 mA signal.

The unit cabinet consists of galvanized steel casing, zinc phosphatized,

with an electrostatically applied baked enamel ﬁnish, capable of withstand-

ing a 500-hour salt spray test.

Hinged control box access panels.

Alarm circuit wiring standard.

PERFORMANCE DATA

UNIT

Capacity (tons)

Compressor Power Input kW

Unit Power Input kW

Minimum Outdoor Operating Temperature

°F (°C)

Capacity Control Steps Minimum Capacity %

Refrigerant

Condenser Entering Air Temperature °F (°C)

Saturated Discharge Temperature

°F (°C)

COOLER

Entering Water Temperature °F (°C)

Leaving Water Temperature

°F (°C)

Chilled Water Flow Gpm (L/s)

Chilled Water Pressure Drop

ft wg (kPa)

Fouling Factor

Fluid

ELECTRICAL DATA

Power Supply to Unit Volts Ph Hz

Power Supply to Control Circuit

Volts Ph Hz

Maximum Instantaneous Current Flow

Amps

Minimum Circuit Amps

Maximum Fuse Amps

Control Circuit Fuse Amps

FACTORY-INSTALLED OPTIONS

M Energy Management Module M High Static Fans

M Motormastert III Control M Hot Gas Bypass

M Brine — 15° F to 40° F LWT M Non-Fused Disconnect

M Cooler Heater M Precoated Aluminum Fins

M Part Winding Start M Copper-Copper Condenser Coils

M Thermostatic Expansion Valve (TXV) M Postcoated Copper Fins

M Low Noise Fans M Postcoated Aluminum Fins

ACCESSORIES

1 2 3 ... 12

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Carrier 30GTN User Manual Page 2

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