Brine earth heat exchanger control

The outside air can be heated in the winter and cooled in the summer with a brine earth heat exchanger.

No extra temperature sensor is needed to control the brine circulating pump (controlled or uncontrolled brine CP). This is handled by the air inlet temperature sensor in the ventilation unit.

If heating, the brine CP is controlled using the unit-specific frost protection strategy → Frost protection strategies. For further information → Brine earth heat exchanger (ZP 1, HP switching contact).