Figure 1.24. Example of single phase connection with 2kW, 4 kW or 6 kW.
If the power supply is three phase 3/N/PE 400 V / 50 Hz, the elements can be connected in star to obtain 6 kW.
Figure 1.25. Example of three phase connection with 6kW.
Do not connect the electrical resistance in delta; this could cause poor heat pump operation and/or heat
pump component breakdowns.
Regardless of the connection method, the electrical resistance must be powered by an external automatic switch that can shut off
all the circuits.
5.4. External protections
It is equipped with a connector that can be connected to various types of external mechanical protections, such as flow switches,
pressure switches, thermostats, etc.
The ESS connector is used to connect these protections. The external protection devices are powered from the heat pump connector
and should have a cut-off capacity of at least 200mA/230Vac.
Figure 1.1. Connection scheme of the external protection devices.
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