19
Air duct connection
3.2.3
Observe the following points when mounting the air ducts:
Mount the air duct types of the ventilation device to the connector stubs in accordance with the
present LEFT or RIGHT device version (see tag next to the cover sheet control).
Fig 19: Layout air ducts version LEFT and version RIGHT
Remove the caps of the air connection;
Use air duct material with air resistance as low as possible, and connect the ventilation
components air-tight among each other;
The connection stubs of the device are made of EPP and have sleeve dimensions DN 125;
The intake air and exhaust air ducts must be insulated in such a way that they are vapour-diffusion
tight;
In the event that a low point is unavoidable when installing the exhaust air duct from the device’s
exhaust air stub to the exhaust air outlet, a connection for condensate drain must be provided at
that point;
A straight pipe routing of the exhaust air from the device connection stub to the roof hood should
be avoided, since during defrosting of possible ice formations, they might fall onto the blades of the
exhaust air fan and cause damage to these blades;
Fig 20: Arrangement drainage of the intake air duct and exhaust air duct
If a silencer is provided at the exhaust air stub, it must be guided upwards by means of a bend in
order to protect it against drenching caused by condensate returning from the exhaust air duct.
If the exhaust air is guided over the roof, this guidance must be equipped with a double-wall or
insulated roof lead-through. Thus, condensate formation between the roof boards is prevented.
For the supply and extract air ducts, we recommend a thermal and vapour resistant insulation in
order to avoid unnecessary temperature loss both in summer and winter.
Connection of the Condensate Drain
3.2.4
The warm extract air is cooled by the intake air in the heat exchanger. Thus, the moisture of the room air
condenses in the heat exchanger. The condensate which forms in the heat exchanger is conducted to the
siphon. The connector
A
of the condensate drain has an external thread of 1¼ inch. It is situated at the
bottom side of the FOCUS in accordance with the respective device version.
Содержание FOCUS 200 Base
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