Wiring - Carrier 40MAHB Series Service Manual

40MAHB: Service Manual

WIRING

All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes. Use the 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 the caution note, only stranded copper conductors with a 600 volt
insulation rating wire must be used.
Recommended Connection Method for Power and Communication
Wiring:
The main power is supplied to the outdoor unit. The field supplied 14/3
stranded wire with ground with a 600 volt insulation rating, power/
communication wiring from the outdoor unit to the indoor unit consists of
four (4) wires and provides the power for the indoor unit.
Two wires are line voltage AC power: connect L1 to terminal (1), N or L2
to (2), Communication wire to (3), green ground wire to ground terminal.
Refer to the "CONNECTION DIAGRAMS"on page 4 for 115 volt or
208/230 volt connection.
If installed in a high electromagnetic field area (EMF) and
communication issues exist, a 14/2 stranded shielded wire can be used to
replace (2) and (3) (polarity sensitive
indoor unit landing the shield onto the ground in the outdoor unit only.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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between the outdoor unit and the
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in damage or
improper operation.
Wires should be sized based on NEC and local codes.
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Be sure to comply with local codes while running wire from
the indoor unit to the outdoor unit.
Every wire must be connected firmly. Loose wiring may
cause the terminal to overheat or result in unit malfunction. A
fire hazard may also exist. Ensure all wiring is tightly
connected.
No wire should touch the refrigerant tubing, compressor or
any moving parts.
Disconnecting means must be provided and shall be located
within sight and readily accessible from the air conditioner.
Connecting cable with conduit shall be routed through the
hole in the conduit panel.
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