Wiring - Carrier 40MBAB Series Service Manual

40MBAB: Service Manual

WIRING

Use the following steps to wire the indoor unit.
NOTE: Wiring in this section is for the base unit ONLY.
1. Prepare the cable for connection.
a. Using wire strippers, strip the insulation from both ends of the
signal cable to reveal about 1/2 in (12mm) of wire.
b. Strip the insulation from both ends of the wires.
c. Use a wire crimper to crimp the fork terminals to the ends of
the wires.
2. Open the indoor unit's front panel. Use a screwdriver to remove the
cover of the electric control box on the indoor unit.
3. Thread the power cable and the signal cable through the wire outlet.
4. Connect the fork terminals to the terminals. Match the wire colors/
labels with the labels on the terminal block.
5. Firmly screw the fork terminals of each wire to its corresponding
terminal. Refer to the serial number and wiring diagram located on
the cover of the electric control box.
Fig. 9 — Control Box and Wiring Diagram
CAUTION
While connecting the wires, strictly follow the wiring diagram.
The refrigerant circuit can become very hot.
Keep the interconnection cable away from the copper tube.
6. Clamp down the cable with the cable clamp. The cable must not be
loose or put strain on the fork terminals.
7. Reattach the electric box cover.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
L1 L2 S
Fig. 10 — Ferrite Core (Magnetic Ring)
The main power is supplied to the outdoor unit. When disconnecting the
power of the outdoor unit, the indoor unit would lose power. A disconnect
switch is not required on the indoor unit side on the wiring between the
outdoor and indoor unit. A 3 pole disconnect (purchased separately) may
be used for extra protection between the indoor and outdoor Unit.
Circuit Breaker
(purchased separately)
Fig. 11 — Wiring Connection of Indoor Unit
The Auxiliary Heater must have a separate branch electric circuit with a
field-supplied disconnect switch located within sight from, and readily
accessible from, the unit.
Circuit Breaker
Electrical heater unit power wires
Electrical
heater
unit
Fig. 12 — Wiring Connection of Electric Heater
8
Pass the belt through the hole
of the ferrite core
(Magnetic Ring
to secure it to the cable
(purchased separately)
3 Pole Disconnect
(purchased separately)
(DO NOT connect to
the indoor unit
circuit breaker!)
(optional)