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BOX 70
If the dwelling has mechanical ventilation that creates under pressure in the room
where the appliance is located, it is necessary to fi t a fl ue gas fan.
The type of fl ue gas fan is dependent on the capacity of the mechanical ventilation
system. Always consult your fi tter about this.
In dwellings with an operating extractor hood, this should be turned to the lowest
setting or turned off altogether. If the extractor hood remains in use, additional
ventilation must be provided in compensation. This will not only avoid poor
combustion, but will also prevent fl ue gases being sucked from the appliance into
the room.
Should creating an extra ventilation opening prove insuffi cient, it is then necessary
to fi t a fl ue gas fan.
• Combustion air directly from outside:
The appliance now has a completely closed combustion system, which allows it to
operate independently of the surrounding air in the room where the appliance is
located.
The combustion air supply can be connected to the back or the underside of the
appliance. To do this, use combustion air connection Ø125 mm (exterior) for the back
or underside. Install a fi xed or fl exible pipe of Ø125 mm in the wall/fl oor between this
air supply connection and outside air supply inlet. We recommend that this pipe is
fi tted with a sealing valve in order to prevent condensation in the appliance when it
is not in use.
Installation instructions
15
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