Wiring - Carrier 38MBRC Series Service Manual

38MBRC: Service Manual

WIRING

All wires must be sized per NEC (National Electrical Code) or CEC
(Canadian Electrical Code) and local codes.
Sizes 36-58 Recommended Connection Method for Power and
Communication Wiring
Power and Communication Wiring:
The main power is supplied to the outdoor unit. The field supplied power
wiring from the outdoor unit to the 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 stranded copper
conductor only, with a 600 volt rating and double insulated copper
wire, must be used as the communication wire from the outdoor unit
to the indoor unit.
Please use a separate shielded 16GA stranded control wire.
Table 2 — Wiring Sizes 36K - 58K
CABLE CABLE SIZE
Communication
16AWG
CABLE
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
REMARKS
2 wire stranded shielded control
wire
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.
3