T9901075-2-3 UK
Page 16 of 38
2) If the defrost cycle auxiliary heater is to be
enabled during site commissioning, see Wiring
Diagram 2 or 4
(400V/3ph/50Hz electrical supply from separate
local isolator)
Connect to terminals Earth, L1, L2, L3 and N with a
3-phase electrical supply.
Connect a Mitsubishi Electric PAR-31MAA Remote
Controller to terminals 1 and 2 on the air curtain, or
a PAR-U02MEDA to terminals M1 and M2.
Connect the M-Net 2-core cable to terminals M1
and M2 on the air curtain – this is the
communication link between the City Multi system
and 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
or 4).
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
Mitsubishi Electric PAR-31MAA or PAR-U02MEDA Remote
Controller (2-core cable)
0.75mm
2
Mitsubishi Electric M-Net (2-core cable)
0.75mm
2
Door switch to change fan speeds as door opens and shuts
0.75mm
2