Trane Cold Generator CGWR Series User Manual

CG-SVX038A-EN 27
Electrical Wiring
General Recommendations
The wiring procedures, as described in this portion of the
manual, must be accomplished to obtain proper operation
of the unit.
All wiring must comply with National Electrical Code
(NEC) and state and local requirements. Outside the
United States, the national and/or local electrical
requirements of other countries shall apply. The installer
must provide properly sized system interconnecting and
power supply wiring with appropriate fused disconnect
switches. Type and locations of disconnects must comply
with all applicable codes.
Minimum circuit ampacities, recommended fuse sizes and
other unit electrical data are provided on the unit
nameplate.
Power and Control Wiring
Unit Power Wiring
The installing contractor must connect appropriate power
wiring (with fused disconnects) to the terminal block or
non-fused, unit-mounted disconnect in the power section
of the unit control panel. Electrical schematics and
component location drawings are also mounted on the
inside of the control panel door.
The unit power fused disconnect switch should be located
in the general area of the unit, to comply with NEC or local
codes. Some codes require line-of-sight disconnect
locations. The optional unit unfused disconnect can be
used as an emergency shutdown device.
Scroll Compressor Electrical Phasing
General
It is critical that proper rotation of the scroll compressors
be established before the machine is started. Proper motor
rotation requires confirmation of the electrical phase
sequence of the power supply. The motor is internally
connected for clockwise rotation with the inlet power
supply phased “ABC” or “L1, L2, L3”.
The order in which the three voltages of a three-phase
system succeed one another is called phase sequence or
phase rotation. When rotation is clockwise, phase
sequence is usually called “ABC” and when
counterclockwise, “CBA”.
This direction may be reversed by interchanging any two
of the line wires. It is this possible interchange of wiring
that makes a phase sequence indicator necessary, if the
operator is to quickly determine the phase rotation of the
motor.
Setting Proper Electrical Phase Sequence
Proper compressor motor electrical phasing can be quickly
determined and, if necessary, corrected before starting the
unit. Use a quality instrument, such as an Associated
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be
inadvertently energized. When necessary to work with
live electrical components, have a qualified licensed
electrician or other individual who has been trained in
handling live electrical components perform these
tasks.
NOTICE:
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not designed
or qualified to accept other types of conductors.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
NOTICE:
Compressor Damage!
Operating compressors in reverse rotation will cause
damage or failure of the compressor.

Trane Cold Generator CGWR Series Specifications

General

Brand	Trane
Model	Cold Generator CGWR Series
Category	Chiller
Language	English