3-way air shutter (ZP 1)

To activate, switch additional circuit board 1 to 3-way air shutter with the DIP switches and set the 3-way air shutter to yes.

Parameters: 3-way air shutter

Set value: No / Yes

Parameters: Lower temperature limit

Set value: -10 ... 5 ... 10°C

Parameters: Upper temperature limit

Set value: 15 ... 20 ... 30°C

Parameters: Hysteresis

Set value: 2 ... 6 K

For additional information about the 3-way air shutter → Air earth heat exchanger 3-way air shutter.

Above or below the set temperature limits (in relation to outside temperature), the 3-way air shutter is set so that the air is guided via the air earth heat exchanger and cooled or heated.

If temperatures are within the limit values, the air is drawn in directly from outside without passing through the air earth heat exchanger. The extra outside air temperature sensor needed (PT 1000) is connected on the additional circuit board.