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40MUAA: Service Manual
WIRING REQUIREMENTS
Size all wires per the NEC (National Electrical Code) or CEC (Canadian
Electrical Code) and local codes. Use the electrical data from the outdoor
unit (MCA - minimum circuit amps and MOCP - maximum over current
protection), to correctly size the wires and the disconnect fuse or breakers
respectively.
Communication Wiring: There are two options available to establish
communication between the outdoor unit and approved indoor unit.
Table 3 — Options for Establishing Communication
OPTIONS
COMMUNICATION TYPE
Non-Polarity RS485
1
Communication (S1 - S2)
2
24V communication
WARNING
Refer to the wiring template for the wiring method.
DO NOT connect the power cord to the communication line as
this may damage the system.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
RECOMMENDED CABLE SIZE
16 AWG (stranded shielded)
18 AWG 8 conductor
thermostat wire
CAUTION
EQUIPMENT DAMAGE HAZARD
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 a 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 located within sight and
readily accessible from the system. Route the connecting cable with
conduit through the hole in the conduit panel.
NOTE: Separate power is required for an Auxiliary Electric
Heater.
CAUTION
EQUIPMENT DAMAGE HAZARD
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 a 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 located within sight and readily
accessible from the system. Route the connecting cable with conduit through
the hole in the conduit panel.
9
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