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Active cooling function
The AIR unit has a reversible cold circuit, which means that it can be used to actively cool the home, using either the floor heating sy-
stem or fan coils.
Active cooling using the floor heating
There is an external temperature sensor connected to digital input 10. When the switch is activated, the AIR unit goes into cooling mode
and cools the home down to a pre-set value. When the switch is deactivated, the AIR unit returns to normal operation.
The external temperature sensor often has an infra-red sensor, which measures the temperature of the floor and stops the cooling
function before condensation forms on the floor.
Active cooling using fan coils
There is an external temperature sensor connected to digital input 10. When the switch is activated, the AIR unit goes into cooling mode
and cools the home down to a pre-set value. At the same time relay output 10 is activated, which can control a three-way valve so that
the water is directed out to fan coils instead of going into the floor. When the switch is deactivated, the AIR unit returns to normal
operation.
CAUTION
If it is wished to operate with cooling, it is important to use glycol in the brine circuit to avoid icing in the heat pump.
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