9 | Electrical installation
Installer reference guide
52
4MWXM-A
R32 Split series
4P678385-1A – 2022.02
Component
Residual current device MUST comply with applicable
legislation
Electrical equipment must comply with EN/IEC 61000-3-12, the European/
International Technical Standard setting the limits for harmonic currents produced
by equipment connected to public low-voltage systems with input current >16 A
and ≤75 A per phase.
9.2 To connect the electrical wiring to the outdoor unit
1 Remove the switch box cover (1 screw).
2 Strip insulation (20mm) from the wires.
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.
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