Connecting The Ducts - Heatrae Sadia Advance Plus Installation Manual

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b) Slip the provided condensate hose over the condensate drain
nozzle.
c) Route the condensate hose to a trap with a water level of least
50 mm. Ensure that the hose is inserted deep enough into the
trap (minimum 30 mm below water surface).
30 mm
d) Fill the trap with water.

3.4. Connecting the ducts

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When using the unit in multi-unit housing, it must be ensured at
all times that there is no backflow into the dwelling from the
central exhaust air duct. In this case, a mechanical check valve
must be installed in the air outlet duct of the unit.
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In order to prevent condensation, the duct from outside and the
duct leading outside must be thermally insulated and vapour-
tight right up to the ventilation unit.
The Advance Plus has two duct adapters at the top. Each duct
adapter has two nozzles for connection to ducts with a diameter of
125 mm. The nozzles are equipped with Leaksafe seals.
3.4.1. Supply air from outside
3.4.2. Exhaust air to outside
> 50 mm
3.4.3. Supply air to dwelling
Warning!
Caution!
The ventilation unit draws in air from outside through
this port. This duct must be thermally insulated and
vapour-tight to prevent condensation from forming on
the outside of the duct. If the ventilation system must
keep running during winter (for frost protection), an
external pre-heater with its temperature setpoint at
-1°C must be used.
The ventilation unit feeds the exhaust air outside
through this port. This duct must be thermally insulated
and vapour-tight in order to prevent condensation from
forming on the inside and outside of the duct. It is
advisable to use a roof feedthrough that does not let in
any condensation or rainwater. If it does, the
components of the duct system between this outlet
nozzle and the roof feedthrough must be watertight.
Any condensation water will be discharged through the
condensate drain of the unit.
The ventilation unit supplies warmed air to the dwelling
through this port. For optimal comfort a silencer should
be fitted on this nozzle.
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