General Ventilation Connection; Ventilation Flow; Adjusting Ventilation; Dimensions And Ventilation Connections - Nibe F370 Installer Manual

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 extract air duct has to be insulated with diffusion-
proof material 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 extract air duct must be a maximum of 20 m long with
a maximum of six bends.
• Because the heat pump contains a flammable refrigerant,
the air ducting system must be earthed. This is done by
making a good electrical connection to the air ducts using
the enclosed earth cables (2). The cables must then be
connected to the earth pins on top of the top cover.
• A duct in a masonry chimney stack must not be used for
extract air.
EXHAUST AIR DUCT /KITCHEN FAN
Exhaust air duct (kitchen fan) must not be connected to
F370.
To prevent cooking odours from being led to the F370, the
distance between the kitchen fan and the exhaust air valve
must be taken into consideration. The distance must not be
less than 1.5 m, but may vary between different installations.
Always use a kitchen fan when cooking.

Ventilation flow

Connect F370 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
must not be less than 28 l/s (100 m³/h) at an exhaust air
temperature of at least 20 °C. When the exhaust air temper-
ature is lower than 20 °C (for example at start-up and when
there is nobody at home), the minimum value is 31 l/s (110
m³/h).
NIBE F370
The heat pump's installation area must be ventilated to at
least 5 l/s (18 m³/h)
Set the ventilation capacity in the heat pump's menu system
(menu 5.1.5 - "fan sp. exhaust air").
If the exhaust air temperature falls below 16 °C, the com-
pressor 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 reduced
installation efficiency and thus poorer operating economy,
a poorer indoor climate and moisture damage in the building.
Dimensions and ventilation
connections
Extract air
440
145
Chapter 4 | Pipe and ventilation connections
Exhaust air
560
595
Ø125
60
21