Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 903 Catalog No. 563-025 Printed in U.S.A. Form 30GTN-3T Pg 1 3-00 Replaces: 30GTN-2T
Book 2
Tab 5 c
Controls Start-Up, Operation,
Service, and Troubleshooting
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roof, elevated structures, etc.). Only
trained, qualified installers and service mechanics should in-
stall, start up, and service this equipment.
When working on this equipment, observe precautions in
the literature, and on tags, stickers, and labels attached to the
equipment, and any other safety precautions that apply. Follow
all safety codes. Wear safety glasses and work gloves. Use care
in handling, rigging, and setting this equipment, and in han-
dling all electrical components.
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
GENERAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,3
MAJOR SYSTEM COMPONENTS
. . . . . . . . . . . . . . 3-10
General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Main Base Board (MBB)
. . . . . . . . . . . . . . . . . . . . . . . . . . 3
Expansion Valve (EXV) Board
. . . . . . . . . . . . . . . . . . . . 3
Compressor Expansion Board (CXB)
. . . . . . . . . . . . . 3
Scrolling Marquee Display
. . . . . . . . . . . . . . . . . . . . . . . 3
Energy Management Module (EMM)
. . . . . . . . . . . . . . 3
Enable/Off/Remote Contact Switch
. . . . . . . . . . . . . . . 3
Emergency On/Off Switch
. . . . . . . . . . . . . . . . . . . . . . . . 3
Reset Button
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Board Addresses
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Control Module Communication
. . . . . . . . . . . . . . . . . . 4
Carrier Comfort Network Interface
. . . . . . . . . . . . . . . 4
OPERATING DATA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-47
Sensors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
• T1 — COOLER LEAVING FLUID SENSOR
• T2 — COOLER ENTERING FLUID SENSOR
• T3,T4 — SATURATED CONDENSING
TEMPERATURE SENSORS
• T5,T6 — COOLER SUCTION TEMPERATURE
SENSORS
• T7,T8 — COMPRESSOR SUCTION GAS
TEMPERATURE SENSORS
• T9 — OUTDOOR-AIR TEMPERATURE SENSOR
• T10 — REMOTE SPACE TEMPERATURE SENSOR
Thermostatic Expansion Valves (TXV)
. . . . . . . . . . . 15
Compressor Protection Control System
(CPCS) or Control Relay (CR)
. . . . . . . . . . . . . . . . . 15
Compressor Ground Current Protection Board
(CGF) and Control Relay (CR)
. . . . . . . . . . . . . . . . . 15
Electronic Expansion Valve (EXV)
. . . . . . . . . . . . . . . 16
Energy Management Module
. . . . . . . . . . . . . . . . . . . . 16
Capacity Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
• ADDING ADDITIONAL UNLOADERS
• MINUTES LEFT FOR START
• MINUTES OFF TIME
• LOADING SEQUENCE
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation and ser-
vice. There may be more than one disconnect switch. Tag
all disconnect locations to alert others not to restore power
until work is completed.
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out com-
ponents, or to bypass or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.
To prevent potential damage to heat exchanger tubes
always run fluid through heat exchangers when adding or
removing refrigerant charge. Use appropriate brine solu-
tions in cooler fluid loops to prevent the freezing of heat
exchangers when the equipment is exposed to temperatures
below 32 F (0° C).
DO NOT VENT refrigerant relief valves within a building.
Outlet from relief valves must be vented outdoors in accor-
dance with the latest edition of ANSI/ASHRAE (American
National Standards Institute/American Society of Heating,
Refrigeration and Air Conditioning Engineers) 15 (Safety
Code for Mechanical Refrigeration). The accumulation of
refrigerant in an enclosed space can displace oxygen and
cause asphyxiation. Provide adequate ventilation in
enclosed or low overhead areas. Inhalation of high concen-
trations of vapor is harmful and may cause heart irregulari-
ties, unconsciousness or death. Misuse can be fatal. Vapor
is heavier than air and reduces the amount of oxygen avail-
able for breathing. Product causes eye and skin irritation.
Decomposition products are hazardous.
DO NOT attempt to unbraze factory joints when servicing
this equipment. Compressor oil is flammable and there is
no way to detect how much oil may be in any of the refrig-
erant lines. Cut lines with a tubing cutter as required when
performing service. Use a pan to catch any oil that may
come out of the lines and as a gage for how much oil to add
to system. DO NOT re-use compressor oil.
30GTN,GTR040-420
30GUN,GUR040-420
Air-Cooled Reciprocating Liquid Chillers
with
Comfort
Link™ Controls
50/60 Hz
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