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Installation
Electrical Wiring
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before
servicing. Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
All wiring must comply with National Electric 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 prop-
erly sized system interconnecting and power supply wiring with appropriate
fused disconnect switches. Type and locations of disconnects must comply
with all applicable codes.
CAUTION
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of conductors.
Failure to use copper conductors may result in equipment damage.
Figures 2 and 3 show the locations of the unit electrical access openings.
Table 4 provides minimum circuit ampacity, recommended fuse sizes, and
motor electrical data.
Shore Power Supply (115V)
The shore power male receptacle located above the unit circuit breaker
enclosure (refer to Figure 2 and 3) is provided for customer convenience to
supply power (refer to Table 4 for allowable voltage range) to compressor
crankcase heaters and factory supplied evaporator heat tape. The crank-
case heaters should operate at least 8 hours before the compressors are
allowed to start.
Chiller Source Unit Power Supply
Refer to the unit wiring schematic pasted to the control panel cover of the
cold generator. The installer must provide a power supply of proper voltage.
Connect power cable provided on the unit to a properly sized fused discon-
nect switch required by local codes. Provide proper equipment grounds
where required.
Heat Tape for Unit Evaporator
The evaporator is insulated from ambient air, and protected from freezing by
thermostatically controlled heat tape(s). The evaporator heat tape circuit is
energized when shore power (115 V) is connected as well as when the sup-
ply power (460V) to the unit is connected. Whenever the thermostat senses
40° F +/- 6° F, it closes, energizing the heat tape(s).
26
CSRA-SVX01A-EN
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