Ventilation connection8
For the Installation engineer
FLM 30
FLM 30 is connected so that all ventilation air, except
for the kitchen fan, passes the heat exchanger (62) in
the exhaust air module. Minimum flow should conform
to the demands as set out in applicable norms. The
ventilation flow should conform to applicable norms.
Switching the ventilation capacity is described in the
section “Electrical installation” “Setting the fan capaci-
ty”. The numbering of the curves refers to the terminal
block on the fan transformer (22).
To prevent fan noise being transferred to the exhaust
air devices, it may be a good idea to install a silencer
in the duct. This is especially important if there are ex-
haust air devices in bedrooms.
Connections can be made using flexible hoses, which
should be stretched well and routed to allow easy re-
placement. The extract air duct must be provided with
diffusion-tight insulation over its entire length.
Provision must be made for inspection of the duct.
Make sure that there are no reductions of cross-sec-
tional area in the form of creases, tight bends etc,
since this will reduce the ventilation capacity. All joins
in the ducting must be sealed and pop-riveted to pre-
vent leakage. The duct system must be carried out in
accordance with current norms. A minimum of air
tightness class B is recommended.
To obtain the necessary air exchange in every room of
the house, the exhaust air devices must be correctly
positioned and adjusted. A defective ventilation instal-
lation may lead to reduced exhaust air module effi-
ciency and thus poorer operating economy, and may
result in damage to the house.
The diagram below shows the available ventilation ca-
pacity.
Ventilation flow
Fan diagram
Duct installation
Adjustment
NOTE!
A duct in a masonry chimney stack
must not be used for extract air.
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