9 | Electrical installation
Installer reference guide
53
4MWXM-A9
R32 Split series
4P708645-1 – 2022.09
a Strip wire end to this point
b An excessive strip length may cause electrical shock or leakage
3 Connect the wires between the indoor and outdoor units so that the terminal
numbers match. Make sure to match the symbols for piping and wiring.
4 Make sure to connect correct wiring to correct room.
d(B)
d(C)
d(TO TANK)
A
d(A)
C
TO TANK
B
a b c
A Terminal for room A
B Terminal for room B
C Terminal for room C
TO TANK Terminal for DHW tank
a Circuit breaker
b Residual current device
c Power supply wire
d Interconnection wire for room (A, B, C, TO TANK)
5 Tighten the terminal screws securely using a Phillips screwdriver.
6 Check that the wires do NOT disconnect by pulling them lightly.
7 Firmly secure the wire retainer to avoid external stress on wire terminations.
8 Pass the wiring through the cutout on the bottom of the protection plate.
9 Make sure that the electrical wiring does NOT make contact with the gas
piping.
a Terminal for indoor unit A
b Terminal for indoor unit B
c Terminal for indoor unit C
d Terminal for DHW tank
e Power supply terminal
f Wire retainer
10 Reattach the switch box cover and the service cover.