Switching contact function

NOTICE With pre-heating/supplementary heating, incorrect installation will result in unit damage.

If external pre-heating or supplementary heating is selected, the power supply for the component should be switched via an external relay.

Parameters: Switching contact

Set value: Alarm, filter message, operating display, shutter, supplementary heating, pre-heating, brine EHE (unregulated pump), cooling. One of the aforementioned external components can be switched with the potential-free switching contact (max. 5 A) of the basic circuit board (main circuit board).

Additional settings for supplementary heating switching points

  1. Under `Switching contact´, select the `Supplementary heating´ parameter.
  2. Under `Supplementary heating´
    • Set `Supplementary heating´ parameter to yes.
    • Adjust switching point with `Hysteresis setpoint temperature´.
    • Set `Supplementary heating´ parameter to no.

Additional settings for brine earth heat exchanger switching points

  1. Under `Switching contact´, select the `Brine earth heat exchanger´ parameter.
  2. Under `Brine earth heat exchanger´
    ,• set the `Brine earth heat exchanger´ parameter to yes.
    • Adjust switching points using `T air inlet offset heating´, `T air inlet hysteresis heating´ and `Air inlet hysteresis cooling´ parameters.
    • Set `Brine earth heat exchanger´ parameter to no.