Genvex VANVEX R +, Manual

Page: 21 / 52

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5. AIR SYSTEM
The inlet air must not be polluted with aggressive components (ammonia, chlorine
etc.) as components parts of the heat pump unit may be damaged. The air also needs
to be free of dust and other particles.
Inlet and outlet ducts shall be made of rigid smooth pipes to minimize pressure losses.
Please take into account the fan working pressure and the ducts pressure losses dur-
ing dimensioning of the duct system (see technical data).
The two connections to the heat pump are Ø 160 mm. It is advised to install the air
ducts near the heat pump, levelled or with a slight inlet, in order to avoid ingress of
condensed water from the duct system to the heat pump.
All air ducts should be insulated after they have been installed, in order to reduce heat
loss and noise level. Insulation has to be applied to protect against external condensa-
tion on the cold exhaust duct.
It is recommended to mount a flexible connection between the air duct and duct con-
nection to ease future service of the unit.
It is also recommended to install silencer units in between the heat pump unit and the
ventilation system to avoid potential travel of noise from the unit to the ventilation
system.
The unit has been designed to operate with different air ducts configurations:
1) Not-ducted unit, ambient air. The unit extracts heat from the ambient air and
lowers the air temperature of 5-15 °C according to the operating conditions.
Since the air is re-directed to the room, this configuration is particularly inter-
esting during summer periods. This configuration is not suggested for winter
periods, especially if the room in which the appliance is located is heated by
other appliances.
2) Partially ducted unit, ambient air. This configuration is normally preferred to
configuration 1 since the cold air coming out from the unit is directed out of the
house.
3) Ducted unit, external air. This configuration minimizes the temperature
decrease of the installation site, since there is no contact between the air in the
room and the air through the heat pump. It is suggested to place the inlet pipe