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CAUTION
CAUTION
For unit protection, use a fuse or HACR circuit breaker that
is in excess of the circuit ampacity, but less than or equal
to the maximum overcurrent protection device. DO NOT
EXCEED THE MAXIMUM OVERCURRENT DEVICE SIZE
SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through
weatherproof ttings. All exterior power supply and ground
wiring must be in approved weatherproof conduit.
The main power supply wiring to the unit and low voltage
wiring to accessory controls must be done in accordance
with these instructions, the latest edition of the National
Electrical Code (ANSI/NFPA 70), and all local codes and
ordinances.
The main power supply shall be three-phase, three wire.
The unit is factory wired for the voltage shown on the unit’s
data plate.
Main power wiring should be sized for the minimum circuit
ampacity shown on the unit’s database. Size wires in
accordance with the ampacity tables in Article 310 of the
National Electrical Code. If long wires are required, it
may be necessary to increase the wire size to prevent
excessive voltage drop. Wires should be sized for a
maximum of 3% voltage drop.
CAUTION
CAUTION
Ensure the data plate is not covered by the eld-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
power leads at the point of distribution in accordance
with the unit data plate.
• The unit must be electrically grounded in accordance
with local codes or, in the absence of local codes,
with the latest edition of the National Electrical Code
ANSI/NFPA 70, and/or the Canadian Electrical Code,
CSA C22.1, Part 1. A ground lug is provided for this
purpose. Do not use the ground lug for connecting a
neutral conductor.
• Connect power wiring to the electrical power block
located within the main control box.
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