Sizes; Wiring; Connection Diagrams - Carrier High Wall Duct Free Split System 38MVC Service Manual

WIRING

The main power is supplied to the outdoor unit. The field supplied connecting cable from the outdoor unit to indoor unit consists of four
wires and provides the power for the indoor unit as well as the communication signal between the outdoor unit and indoor unit.
Voltage drop on the connecting cable should be kept to a minimum. Use cable size and max length below:
18 AWG
16 AWG

CONNECTION DIAGRAMS

Notes:
1. Do not use thermostat wire for any connection between indoor and outdoor units.
2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity.
3. On the 18k and 24k units, the "S" terminal "CONTROL" output is pulse DC with a potential AC voltage shock hazard.
50 ft. (16 m)
100 ft. (33 m)
CONNECTING CABLE
CONTROL
CONNECTING CABLE
CONNECTING CABLE
Fig. 5 – Connection Diagrams
9
CONTROL
A07654