Installation of Indoor Unit
24
Air-to-Water Heat Pump
Heating system
For unobstructed and safe operation, it is important to have a heat accumulator with a minimal vol-
ume of 40 l (integrated in the IDU). The accumulator is needed for hydraulic balancing, ensuring un-
obstructed flow and defrosting. A larger accumulator ensures a more balanced temperature of
heating and more comfort.
When installing an additional larger heat accumulator, it is necessary to close the ball valve in the
indoor unit. The location of the closing valve is indicated on the picture below.
C
C
Ball valve
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