General ventilation
connection
• Ventilation installation must be carried out in accord-
ance 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-sec-
tional 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 tight-
ness class B.
• To prevent fan noise being transferred to the ventila-
tion devices, silencers should be installed in the duct
system. In the event of ventilation devices in noise-
sensitive rooms, silencers must be installed.
• The extract air and outdoor air ducts are insulated us-
ing diffusion-proof material along their entire lengths.
• Ensure that the condensation insulation is thoroughly
sealed at any joints and/or at lead-in nipples, silencers,
roof cowls, outdoor air dampers or similar.
• The ventilation ducts should be installed in such a way
that it is easy to open the inverter box.
• A duct in a masonry chimney stack must not be used
for extract air.
NOTE
F730 occasionally has a very low extract air and
outdoor air temperature. To avoid damaging
the product and/or the building, it is therefore
important that the extract and outdoor air
ducts, the damper section and the motor shelf
are insulated with diffusion-proof material along
their entire length.
TIP
If additional condensation insulation dimension
Ø 200 is installed on the outside of the existing
exhaust line between the heat pump and the
inner roof, the noise in the installation area is
reduced by 1-2 dB(A).
EXHAUST AIR DUCT /KITCHEN FAN
Exhaust air duct (kitchen fan) must not be connected to
F730.
To prevent cooking odours from being led to the F730,
the distance between the kitchen fan and the exhaust
air valve must be observed. The distance should not be
less than 1.5 m.
Always use a kitchen fan when cooking.
Ventilation flow
Connect F730 so that all the exhaust air, except kitchen
duct air (kitchen fan), passes through the evaporator
(EP1) in the heat pump.
The ventilation flow must comply with the applicable
national standards.
For optimum heat pump performance, the ventilation
flow should not be less than 21 l/s (75 m³/h).
Set the ventilation capacity in the heat pump’s menu
system (menu 5.1.5).
If the exhaust air temperature falls below 6°C, the
compressor is blocked and electric additional heat is
permitted. No energy is recovered from the exhaust air
when the compressor is blocked.
Adjusting ventilation
To obtain the necessary air exchange in every room of
the house, the exhaust air devices must be correctly
positioned and adjusted and the fan in the heat pump
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 re-
duced installation efficiency and thus poorer operating
economy, and may cause moisture damage in the
building
NIBE F730Chapter 4 | Pipe and ventilation connections24
To Next Page
Loading...
