28
UNIVERSAL-6 65
Installation instructions
3.3.2 Aeration / ventilation
The appliance generates: - convection air
- combustion air
Convection air is devoted to the convection of heat from the appliance to the room.
The source of heat is in the room and stays there.
If the appliance is fi tted with a convection fan, this can be regulated using an built-in
dimmer. Once the appliance is hot enough, the fan automatically starts.
Combustion air is needed to keep the combustion going by drawing in air from the
room, of directly from outside, due to the natural draught of the chimney.
On delivery, the appliance is prepared for a combustion air supply from the living room
or a combustion air supply directly from the outside.
• Combustion air from the living-room:
The air inlet openings are located under the operating fl ap. When using the
appliance, please ensure there is a suffi cient supply of fresh air: use a grate with a
minimum net opening in the outer wall of 150 cm
2
.
Make sure that the ventilation supply is open; this is particularly important with
today’s airtight dwellings.
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 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.
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