T9901085-1-3 UK
Page 15 of 38
2) If the defrost cycle auxiliary heater is to be enabled
during site commissioning
(400V/3ph/50Hz electrical supply from separate local
isolator), see Wiring Diagram 2, Page 17
Connect to terminals Earth, L1, L2, L3 and N with a 3-
phase electrical supply.
Connect terminals S2 and S3 from the outdoor unit to
terminals S2 and S3 on the air curtain – Communication
link between outdoor unit and the air curtain.
Connect a Mitsubishi Electric PAR-W21MAA or PAR-
30MAA Remote Controller to terminals 1 and 2 on the
air curtain.
If required the defrost cycle auxiliary heater can be
enabled by disconnecting the neutral wire (violet) from
the auxiliary terminal
14NO
on the contactor inside the
air curtain. This wire is then connected onto terminal A2
on the contactor as shown in the adjacent picture (see
also Wiring Diagram 2 on Page 17).
Recommended wire sizes for electrical connections are as follows:
Electrical Connection
Wire Size
1-phase electrical supply from separate local isolator
2.5mm
2
max. for access
3-phase electrical supply from separate local isolator - if the
defrost cycle auxiliary heater is to be enabled
2.5mm
2
max. for access
S2, S3 – communication link between outdoor unit and the
air curtain
1.5mm
2
Mitsubishi Electric PAR-W21MAA or PAR-30MAA Remote
Controller (2-core cable)
0.75mm
2
Door switch to change fan speeds as door opens and shuts
or Remote 3-Speed fan switch
0.75mm
2
Refer to Mitsubishi Electric for electrical details of the Mr Slim Outdoor Unit.
