Electrical Data; Wiring - Carrier 40MPHA Service Manual

ELECTRICAL DATA

HIGH WALL UNIT SIZE
9K
12K
Heat Pump Models
18K
24K

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 indoor unit
consists of four (4) wires and provides the power for the indoor unit.
Two wires are line voltage AC power, one is communication wiring
(S) and the other is a ground wire. Wiring between the indoor and
outdoor unit is polarity sensitive. The use of BX wire is NOT
recommended.
If installed in a high Electromagnetic field (EMF) area and
communication issues exists, a 14/2 stranded shielded wire can be
used to replace L2 and (S) between the outdoor unit and indoor unit
landing the shield onto ground in the outdoor unit only.
40MPHA-03SM
Table 5 — Electrical Data
INDOOR FAN
V-Ph-Hz FLA
0.34
0.34
208/230-1-60
0.5
0.5
Specifications subject to change without notice.
MAX FUSE CB AMP
HP
0.027
Refer to outdoor unit installation instructions –
0.027
Indoor unit powered by the outdoor unit
0.082
0.082
CAUTION
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment 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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