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Safety switch and earth-fault breaker
Safety switch
All heating installations must be isolated by a safety switch.
Earth-fault breaker
If the heating installation is to be connected across an earth-fault breaker
then a separate earth-fault breaker for the heating installation is recom-
mended. Comply with applicable regulations.
Emergency operation
The heat pump is equipped with emergency operation which means that
the additional heater takes over the heat production in the event of faults in
the control unit. Read more about emergency operation in the User Guide.
On the OPB circuit board there is switch, S4, which can be activated for
emergency operation, see under heading Wiring diagram Accessory unit.
Connecting to the power supply
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