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a
The ST1 connection is bridged by default. Do not
remove the jumper.
a
If the installation involves the use of thermostats
or timer-controlled thermostats to manage the
heat request, it is necessary to ensure that they
do not have a proportional-band control logic.
This logic may indeed cause inefficient behaviour
of the system and fail to guarantee the fulfilment
of the room temperature set-point. We recom-
mend using modulating thermostats, modulat-
ing timer-controlled thermostats or ON/OFF ther-
mostats without proportional band logic.
– Fasten the power cable (2) to the terminal board (M1).
– Fasten the communication cable (3) between the out-
door and indoor units to the terminal board (M2).
– To ensure adequate resistance to pulling, the power ca-
bles must be secured using the cable clamps (4).
M2
4
3
34 / EN
M1
4
2
Fig. 60
Electrical connections
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