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Conduit and fittings must be weather-tight to prevent
water entry into the building.
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 fittings. 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 unit is factory wired for the voltage shown on the unit's
data plate. Refer to model nomenclature in Appendix B for
voltage requirement for your unit.
NOTE: If supply voltage is 208V, lead on primary
of transformer(s) must be moved from the 230V
to the 208V tap. Refer to wiring diagram on unit
for details.
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.
To avoid risk of property damage, personal injury or fire,
use only copper conductors.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
NOTE: A weather-tight disconnect switch,
properly sized for the unit total load, must be
field or factory installed. An external field
supplied disconnect may be mounted on the
exterior panel.
CAUTION
CAUTION
CAUTION
Ensure the data plate is not covered by the field-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.
Control Box Connections
NOTE: depending on the options installed, the
location of the components may vary in some
models.
Failure of unit due to operation on improper line voltage or
with excessive phase unbalance constitutes product abuse
and will void your warranty and may cause severe damage
to the unit electrical components.
7
Control Box
WARNING
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