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5.2 Left and Right models
There are two model options, right (R) and left (L) model. The different models are recognized by the placing of the in-
ternal components and the supply air outlet, which is situated on left side of the unit on an (L) unit and on the right hand
side on an (R) unit.
Note:
This document describes a right (R) model. The inside of a left (L) model is mirrored.
5.3 Installation recommendation regarding condensation
5.3.1 Condensation inside of the unit
When the unit is installed in a cold attic (close to outdoor temperature) the unit should run continuously. If the unit is in-
tended to be stopped by the user manually or due to calendar function we recommend to install air tight dampers at ex-
tract and supply air ducts. The dampers will ensure that no air circulates from the warm parts of the building through
the unit to outside (chimney effect). If no dampers are installed there is risk of condensation inside the unit and the out-
door ducts during these stop periods. It also might be that cold air from outside could pass the unit and enter into the
building. That could cause condensation outside the supply and extract air ducts and even at the valves in the rooms.
When the unit is not running due to late commissioning in winter time, the supply and extract air ducts should be dis-
connected and closed due to above mentioned effects until commissioning and regular operation.
5.3.2 Condensation outside of the unit
When the unit is installed in warm humid areas (like laundry) together with low outdoor temperature there is a certain
point where moisture can condense outside of the casing. The condensation relation to indoor relative humidity, room
and outdoor temperature is shown diagram below. The condensation outside of the unit do not occur in zones bellow
each curve.
Important
Recommendation: If condensation occurs, increase ventilation in area close to the unit.
1. Room temperature 20°C
2. Room temperature 22°C
3. Room temperature 24°C
4. Room temperature 26°C
Examples when condensation outside of the unit can occur:
211480 | B003
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