5
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
S
Wires should be sized based on NEC and local codes.
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Use copper conductors only with a minimum 300 volt .
rating and 2/64 inch thick insulation.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
S
Be sure to comply with local codes while running wire from
indoor unit to outdoor unit.
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Every wire must be connected firmly. Loose wiring may
cause terminal to overheat or result in unit malfunction. A
fire hazard may also exist. Therefore, be sure all wiring is
tightly connected.
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No wire should be allowed to touch refrigerant tubing,
compressor or any moving parts.
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Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
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Connecting cable with conduit shall be routed through hole
in the conduit panel.
All wires must be sized per NEC (National Electrical Code) or
CEC (Canadian Electrical Code) and local codes. Use Electrical
Data table MCA (minimum circuit amps) and MOCP (maximum
over current protection) to correctly size the wires and the
disconnect fuse or breakers respectively.
Per caution note, only copper conductors with a minimum 300
volt rating and 2/64- inch thick insulation must be used. The use
of BX cable is not recommended.
Sizes 18- 42
Recommended Connection Method for Power and
Communication - Wiring - Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied
14/3 power/communication wiring from the outdoor unit to indoor
unit consists of four (4) wires and provides the power for the
indoor unit. Two wires are high voltage AC power; one is
communication wiring and the other is a ground wire.
Recommended Connection Method for Power and
Communication Wiring (To minimize communication wiring
interference)
Power Wiring:
The main power is supplied to the outdoor unit. The field supplied
power wiring from the outdoor unit to indoor unit consists of three (3)
wires and provides the power for the indoor unit. Two wires are high
voltage AC power and one is a ground wire. To minimize voltage
drop, the factory recommended wire size is 14/2 stranded with a
ground.
Communication Wiring:
A separate shielded copper conductor only, with a minimum 300
volt rating and 2/64- inch thick insulation, must be used as the
communication wire from the outdoor unit to the indoor unit.
Please use a separate shielded 16GA stranded control wire.
For sizes 48- 56
Recommended Connection Method for Power and
Communication - Wiring - Power and Communication Wiring:
Power Wiring OUTDOOR UNIT& BRANCH BOXES:
Separate power supplies are required for the outdoor unit and the
Branch Boxes. The indoor units are powered from the Branch Boxes.
The field supplied 14/3 power wiring from the
OUTDOOR UNIT
consists of three (3) wires. Two wires are high voltage AC power, one
is a ground wire.
The field supplied 14/3 power wiring from the
BRANCH BOXES
consists of three (3) wires. Two wires are high voltage AC power, one
is a ground wire.
Up to three (3) Branch Boxes can be powered from the same 15 amp
breaker.
Communication Wiring:
A separate shielded copper conductor only, with a minimum 300 volt
rating and 2/64- inch thick insulation, must be used as the
communication wire from the
OUTDOOR UNIT
to the
BRANCH
BOX
.
Please use a separate shielded 16GA stranded control wire.
Power and Communication Wiring BRANCH BOXES to
INDOOR UNITS:
The field supplied 14/3 power/communication wiring from the
BRANCH BOX
to the
INDOOR UNIT
consists of four (4) wires
and provides the power for the indoor unit. Two wires are high
voltage AC power, one is communication wiring “2” and the other is
a ground wire “N(1)”
See diagram below for details on wiring for sizes 48- 56.
Fig. 1
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Wiring Connection
