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8
Figure 8. Power Entry
Low Voltage
High Voltage
ELECTRICAL CONNECTIONS
WARNING:
To avoid electric shock, personal
injury, or death, turn off the electric
power at the disconnect or the main
service panel before making any
electrical connections.
• Electrical connections must be in
compliance with all applicable local codes
and ordinances, and with the current
revision of the National Electric Code
(ANSI/NFPA 70).
• For Canadian installations the electrical
connections and grounding shall comply with
the current Canadian Electrical Code (CSA
C22.1 and/or local codes).
Pre-Electrical Checklist:
Verify that the voltage, frequency, and phase
of the supply source match the specifi cations
on the unit rating plate.
Verify that the service provided by the utility is
suffi cient to handle the additional load imposed
by this equipment. refer to the unit wiring label
for proper high and low voltage wiring.
Verify factory wiring is in accordance with the
unit wiring diagram (Figures 15 - 16, pages
18 - 19). Inspect for loose connections.
Line Voltage
• It is recommended that the line voltage to the
unit be supplied from a dedicated branch circuit
containing the correct fuse or circuit breaker
for the unit.
• An electrical disconnect must be located
within sight of and readily accessible to the
unit. This switch shall be capable of electrically
de-energizing the outdoor unit. See unit data
label for proper incoming fi eld wiring. Any
other wiring methods must be acceptable to
authority having jurisdiction.
• Provide power supply for the unit in accordance
with the unit wiring diagram, and the unit rating
plate.
• Connect the line-voltage leads to the
terminals on the contactor inside the control
compartment. Extend leads through power
wiring hole (Figure 8). Connect L1 and L2
directly to the contactor.
• Use only copper wire for the line voltage power
supply to this unit. Use proper code agency
listed conduit and a conduit connector for
connecting the supply wires to the unit. Use
of rain tight conduit is recommended.
• See the unit wiring label for proper high and low
voltage wiring. Make all electrical connections
in accordance with all applicable codes and
ordinances.
CAUTION:
Label all wires prior to
disconnection when servicing
controls. Wiring errors can
cause improper and dangerous
operation. Verify proper operation
after servicing.
• Units are shipped from the factory wired for 240
volt transformer operation. For 208V operation,
remove the lead from the transformer terminal
marked 240V and connect it to the terminal
marked 208V.
Grounding
WARNING:
The unit cabinet must have
an uninterrupted or unbroken
electrical ground to minimize
personal injury if an electrical
fault should occur. Do not use gas
piping as an electrical ground!
This unit must be electrically grounded in
accordance with local codes or, in the absence
of local codes, with the National Electrical Code
(ANSI/NFPA 70) or the CSA C22.1 Electrical
Code. Use the grounding lug provided in the
control box for grounding the unit.