Carrier GTR040-420 Specifiche Scaricare il pdf (Pagina 2)

CONTENTS (cont)

Page

Capacity Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

• ADDING ADDITIONAL UNLOADERS

• MINUTES LEFT FOR START

• MINUTES OFF TIME

• LOADING SEQUENCE

• LEAD/LAG DETERMINATION

• CAPACITY SEQUENCE DETERMINATION

• CAPACITY CONTROL OVERRIDES

Head Pressure Control

. . . . . . . . . . . . . . . . . . . . . . . . . . 28

• COMFORTLINK™ UNITS (With EXV)

Pumpout

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

• EXV UNITS

• TXV UNITS

Scrolling Marquee Display

. . . . . . . . . . . . . . . . . . . . . . . 30

Accessory Navigator Module

. . . . . . . . . . . . . . . . . . . . 30

Adjusting the Contrast

. . . . . . . . . . . . . . . . . . . . . . . . . . 31

Adjusting the Backlight Brightness

. . . . . . . . . . . . . . 31

Service Test

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Configuring and Operating Dual Chiller

Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Temperature Reset

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Cooling Set Point (4 to 20 mA)

. . . . . . . . . . . . . . . . . . . 49

Demand Limit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

• DEMAND LIMIT (2-Stage Switch Controlled)

• EXTERNALLY POWERED DEMAND LIMIT

(4 to 20 mA Controlled)

• DEMAND LIMIT (CCN Loadshed Controlled)

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . . . . 52-57

Compressor Protection Control System

(CPCS) Board

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Compressor Ground Current (CGF) Board

(30GTN,R and 30GUN,R130-210, 230A-315A,

and 330A/B-420A/B)

. . . . . . . . . . . . . . . . . . . . . . . . . . . 52

EXV Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

• STEP 1 — CHECK PROCESSOR EXV OUTPUTS

• STEP 2 — CHECK EXV WIRING

• STEP 3 — CHECK RESISTANCE OF EXV MOTOR

WINDINGS

• STEP 4 — CHECK THERMISTORS THAT

CONTROL EXV

• STEP 5 — CHECK OPERATION OF THE EXV

Alarms and Alerts

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58-70

Electronic Components

. . . . . . . . . . . . . . . . . . . . . . . . . 58

Compressors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

• COMPRESSOR REMOVAL

• OIL CHARGE

Cooler

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

•COOLER REMOVAL

• REPLACING COOLER

• SERVICING THE COOLER

Condenser Coils

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Condenser Fans

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Refrigerant Feed Components

. . . . . . . . . . . . . . . . . . . 63

• ELECTRONIC EXPANSION VALVE (EXV)

• MOISTURE-LIQUID INDICATOR

• FILTER DRIER

• LIQUID LINE SOLENOID VALVE

• LIQUID LINE SERVICE VALVE

Refrigerant Circuit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Thermistors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

•LOCATION

• REPLACING THERMISTOR T2

• REPLACING THERMISTORS T1,T5,T6,T7, AND T8

• THERMISTORS T3 AND T4

• THERMISTOR/TEMPERATURE SENSOR CHECK

Page

Safety Devices

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

• COMPRESSOR PROTECTION

• LOW OIL PRESSURE PROTECTION

• CRANKCASE HEATERS

• COOLER PROTECTION

Relief Devices

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

• HIGH-SIDE PROTECTION

• LOW-SIDE PROTECTION

• PRESSURE RELIEF VALVES

Other Safeties

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

MAINTENANCE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

PRE-START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70,71

System Check

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

START-UP AND OPERATION

. . . . . . . . . . . . . . . . . . 71,72

Actual Start-Up

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Operating Limitations

. . . . . . . . . . . . . . . . . . . . . . . . . . . 71

• TEMPERATURES

• VOLTAGE

• MINIMUM FLUID LOOP VOLUME

• FLOW RATE REQUIREMENTS

Operation Sequence

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

FIELD WIRING

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72-74

APPENDIX A — CCN TABLES

. . . . . . . . . . . . . . . . 75-83

APPENDIX B — FLUID PRESSURE DROP

CURVES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84-91

APPENDIX C — MOTORMASTER® V

CONFIGURATION

. . . . . . . . . . . . . . . . . . . . . . . . . . 92-95

START-UP CHECKLIST

. . . . . . . . . . . . . . . . .CL-1 to CL-8

GENERAL

The model 30GTN,R chillers are air-cooled chillers utiliz-

ing refrigerant R-22. The model 30GUN,R chillers are air-

cooled chillers utilizing refrigerant R-134a.

Unit sizes 230-420 are modular units which are shipped as

separate sections (modules A and B). Installation instructions

specific to these units are shipped inside the individual mod-

ules. See Tables 1A and 1B for a listing of unit sizes and modu-

lar combinations. For modules 230B-315B, follow all general

instructions as noted for unit sizes 080-110. For all remaining

modules, follow instructions for unit sizes 130-210.

INTRODUCTION

This publication contains Start-Up, Service, Controls, Oper-

ation, and Troubleshooting information for the 30GTN,R040-

420 and 30GUN,R040-420 liquid chillers with ComfortLink

controls.

The 30GTN,R and 30GUN,R040-420 chillers are equipped

with electronic expansion valves (EXVs) or, on size 040-110

FIOP (factory-installed option) units, conventional thermostat-

ic expansion valves (TXVs). The size 040-110 FIOP chillers

are also equipped with liquid line solenoid valves (LLSV).

NOTE: TXVs are not available on modular units.

Differences in operations and controls between standard

and 040-110 FIOP units are noted in appropriate sections in

this publication. Refer to the Installation Instructions and the

Wiring Diagrams for the appropriate unit for further details.

1 2 3 4 5 6 7 ... 103 104

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