SECT
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7
7-1
T-268-07
SECTION 7
ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS
7.1
INTRODUCTION
This section contains Electrical Schematics and Wiring Diagrams covering the Models listed in Table 1-1. The
following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual.
They are recommended precautions that must be understood and applied during operation and maintenance of the
equipment covered herein.
WARNING
It has been determined that pressurized, air-rich mixtures of refrigerants and air can undergo
combustion when exposed to an ignition source.
WARNING
Beware of unannounced starting of the evaporator and condenser fans. Do not open the condenser fan
grille before turning power OFF and disconnecting power plug.
WARNING
Make sure power to the unit is OFF and power plug disconnected before removing capacitor(s).
WARNING
Do not attempt to remove power plug(s) before turning OFF start-stop switch (ST), unit circuit
breaker(s) and external power source.
Make sure the power plugs are clean and dry before connecting to any power receptacle.
WARNING
Make sure power to the unit is OFF and power plug disconnected before replacing the compressor.
WARNING
Before disassembly of the compressor make sure to relieve the internal pressure very carefully by
slightly loosening the bolts on both service valve flanges/blank valve pads, then lightly tapping sides of
the valve flanges/pads with a hammer to break the seal.
CAUTION
Use only Carrier Transicold approved Polyol Ester Oil (POE) -- Castrol-Icematic SW20 compressor oil
with R-134a. Buy in quantities of one quart or smaller. When using this hygroscopic oil, immediately
reseal. Do not leave container of oil open or contamination will occur.
WARNING
Do not attempt to do service work on the Controller/DataCORDER module. Breaking of the warranty
seal will void the warranty.
CAUTION
Remove the Controller/DataCORDER module and unplug all wire harness connectors before
performing any arc welding on any part of the container.
Do not remove wire harnesses from module unless you are grounded to the unit frame with a static safe
wrist strap.
NOTE
To avoid damage to the earth’s ozone layer, use a refrigerant recovery system whenever removing refrigerant.
When working with refrigerants you must comply with all local government environmental laws. In the U.S.A.,
refer to EPA section 608.
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