Setting the supply air temperature control method

The Control settings screen opens:

The options are Supply air, Extract air, and Cooling.

• Supply air (factory setting) — The supply air temperature is maintained at the set target value (+5…+25°C). The unit uses automatic heat recovery and, if necessary, post-heating to maintain the target temperature.
  • If the air temperature is lower than the target supply air temperature after the air has passed through the HR cell, the ventilation unit activates the post-heating resistor.
  • If heating the supply air is not necessary, the HR cell is bypassed.
• Extract air — The supply air temperature is adjusted automatically according to the temperature of air extracted from indoors. The unit reacts to changes in indoor air temperature and maintains balanced indoor air conditions. If the apartment is warm, the supply air is cooled down automatically and vice versa.
  • If the extract air temperature is lower than the supply air temperature set for the active ventilation mode, the unit increases the supply air temperature (max. 10°C). If necessary, the unit uses the post-heating resistor.
  • If the extract air temperature is higher than the supply air temperature set for the active ventilation mode, the unit reduces the supply air temperature (max. 10°C). If heating the supply air is not necessary, the HR cell is bypassed.
• Cooling — This control method is based on the extract air temperature. In addition, ventilation is boosted when necessary to keep the supply air temperature close to the target temperature, especially in warm weather. This control method is ideal for situations, in which the indoor temperature rises easily.