General ventilation connection
• Ventilation installation must be carried out in accordance
with current norms and directives.
• Connections must be made via flexible hoses, which
should be installed so that they are easy to replace.
• Provision must be made for inspection and cleaning of
the duct.
• Make sure that there are no reductions of cross-sectional
area in the form of creases, tight bends, etc., since this
will reduce the ventilation capacity.
• The air duct system must be a minimum of air tightness
class B.
• To prevent fan noise being transferred to the ventilation
devices, install silencers in suitable locations in the duct
system.
• The outdoor air duct is insulated using diffusion-proof
material (at least PE30 or equivalent) along its entire
length.
• Ensure that the condensation insulation is fully sealed at
any joints and/or at lead-in nipples, silencers, roof cowls
or similar.
• The air must be routed to the outdoor air duct through an
outer wall grille in the facade. The outer wall grille must
be installed so that it is protected from the weather and
must be designed so that no rainwater and/or snow can
penetrate the facade or follow the air into the duct.
• When positioning the outdoor air and extract air
hood/grille, bear in mind that the two air flows must not
short circuit to prevent the extract air from being drawn
into SAM S42 again.
• When external devices that affect the ventilation are used,
for example kitchen fans and stoves, the heat pump must
be in operation. There is a risk of freezing at low outdoor
temperatures.
• It is not permitted to use a duct in a masonry chimney
stack for outdoor air.
Ventilation flow
The supply air flow must be lower than the exhaust air flow
to prevent over pressure in the house.
The ventilation capacity is set in the heat pump’s menu
system (menu 7.1.4 - "Ventilation").
Adjusting ventilation
To obtain the necessary air exchange in every room of the
house, the exhaust air device and the supply air device must
be correctly positioned and adjusted and the fans in the
heat pump and supply air module adjusted.
Immediately after installation adjust the ventilation so that
it is set according to the projected value of the house.
Incorrect adjustment of the ventilation may lead to reduced
installation efficiency and thus poorer operating economy,
a poorer indoor climate and moisture damage in the building.
Ventilation connections
SAM S42Chapter 4 | Pipe and ventilation connections16
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