8.4.1 Operation without the collector (operating during construction)

You can use the heat pump for controlling external heat sources already before the collector is connected. In this case, heating takes place with the electric heaters in the heating and domestic water accumulators. All control functions for heating and domestic water are available. However, please note that the heating and domestic water circuits must be connected and vented, and that the electrical connections must be completely ready for use. The controls of electric heaters must be connected to the heat pump control.

If you want to operate the heat pump without the collector, set the HP operating mode to Backup heat mode. In this mode, the compressor (K1) and source pump (Q8) will not start.