CONTENTS (cont)
Page
Head Pressure Control ......................27
• COMFORTLINK™ UNITS (With EXV)
• UNITS WITH TXV
Pumpout ...................................27
• EXV UNITS
• TXV UNITS
Marquee Display Usage .....................29
Service Test ................................29
Configuring and Operating Dual Chiller
Control ...................................29
Temperature Reset ..........................43
Demand Limit ...............................45
• DEMAND LIMIT (2-Stage Switch Controlled)
• EXTERNALLY POWERED DEMAND LIMIT
(4 to 20 mA Controlled)
• DEMAND LIMIT (CCN Loadshed Controlled)
TROUBLESHOOTING ......................46-51
Compressor Protection Control System
(CPCS) Board .............................46
Compressor Ground Current (CGC) Board
(30GTN,R130-210, 230A-315A, and
330A/B-420A/B) ...........................46
EXV Troubleshooting ........................46
• 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 ...........................47
SERVICE ..................................52-64
Electronic Components .....................52
Compressors ...............................52
• COMPRESSOR REMOVAL
• OIL CHARGE
Cooler ......................................52
• COOLER REMOVAL
• REPLACING COOLER
• SERVICING THE COOLER
Condenser Coils ............................55
Condenser Fans ............................55
Refrigerant Feed Components ...............56
• ELECTRONIC EXPANSION VALVE (EXV)
• MOISTURE-LIQUID INDICATOR
• FILTER DRIER
• LIQUID LINE SOLENOID VALVE
• LIQUID LINE SERVICE VALVE
Thermistors ................................57
• LOCATION
• REPLACING THERMISTOR T2
• REPLACING THERMISTORS T1,T5,T6,T7, AND T8
• THERMISTORS T3 AND T4
• THERMISTOR/TEMPERATURE SENSOR CHECK
Safety Devices ..............................63
• COMPRESSOR PROTECTION
• LOW OIL PRESSURE PROTECTION
• CRANKCASE HEATERS
• COOLER PROTECTION
Relief Devices ..............................64
• HIGH-SIDE PROTECTION
• LOW-SIDE PROTECTION
• PRESSURE RELIEF VALVES
Other Safeties ..............................64
PRE-START-UP .............................64
System Check ..............................64
START-UP AND OPERATION ...............65,66
Actual Start-Up .............................65
Page
Operating Limitations .......................65
• TEMPERATURES
• VOLTAGE
• MINIMUM FLUID LOOP VOLUME
• FLOW RATE REQUIREMENTS
Operation Sequence ........................66
APPENDIX A — CCN TABLES ..............67-74
START-UP CHECKLIST ..............CL-1 to CL-8
GENERAL
Unit sizes 230-420 are modular units which are shipped
as separate sections (modules A and B). Installation instruc-
tions specific to these units are shipped inside the individual
modules. See Table 1 for a listing of unit sizes and modular
combinations. For modules 230B-315B, follow all general
instructions as noted for unit sizes 080-110. For all remain-
ing modules, follow instructions for unit sizes 130-210.
INTRODUCTION
This publication contains Start-Up, Service, Controls, Op-
eration, and Troubleshooting information for the 30GTN,R040-
420 liquid chillers with ComfortLink controls.
The 30GTN,R chillers are equipped with electronic ex-
pansion valves (EXVs) or, on size 040-110 FIOP (factory-
installed option) units, conventional thermostatic 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.
This unit uses a microprocessor-based electronic con-
trol system. Do not use jumpers or other tools to short
out or bypass components or otherwise depart from
recommended procedures. Any short-to-ground of the
control board or accompanying wiring may destroy the
board or electrical component.
Table 1 — Unit Sizes and Modular Combinations
UNIT MODEL
30GTN,R
NOMINAL
TONS
SECTION A
UNIT 30GTN,R
SECTION B
UNIT 30GTN,R
40 40 — —
45 45 — —
50 50 — —
60 60 — —
70 70 — —
80 80 — —
90 90 — —
100 100 — —
110 110 — —
130 125 — —
150 145 — —
170 160 — —
190 180 — —
210 200 — —
230 220 150 080
245 230 150 090
255 240 150 100
270 260 170 100
290 280 190 110
315 300 210 110
330 325 170 170
360 350 190 190/170*
390 380 210 190
420 400 210 210
*60 Hz units/50 Hz units.
2
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