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5.2 Supply of combustion air
WARNING The installation must have enough outside air
to ensure problem-free combustion. If lower values are
established based on the calculated volume of combustion
air, building in the fireplace is for the risk of the Kalfire-
approved installer.
The fireplace has a built-in fresh air valve. In normal situations, no
additional air valve is required. In situations where the side gable is
subjected to frequent high winds or where there are large indoor/
outdoor pressure dierences, it is advisable to mount an extra air
valve. In that case the valve must be clearly marked to indicate the
open and closed position. Inform the user about the function and
operation of the valve(s).
WARNING
Some air valve manufacturers utilise plastic sleeves.
Mount these outside the heat radiation range of the
fireplace.
Take care that the fresh air actually is outside air.
For example, if the combustion air originates from a cellar,
this cellar must have sucient air vents to ensure that any
extracted air is replaced by fresh, outside air.
Ensure that the gratings are placed so that they cannot
become blocked
5.2.1 Base or rear fresh air connection(s)
The fresh air connection is situated on the side or underside of
corner fireplaces. The fresh air connection cannot be relocated
to the rear.
Front and tunnel fireplaces, 3-sided fireplaces and the room
divider standardly have the fresh air connection at the rear, this
can be relocated to the underside:
1. Demount the connecting collar at the rear of the fireplace.
2. Demount the cover plate at the base of the fireplace and fit
it at the rear at the site of the connecting collar.
3. Mount the connecting collar onto the base of the fireplace
at the site of the cover plate.
Figure 17: Moving the fresh air connection
5.2.2 Fresh air connection without connecting collar
(front models)
If there is not enough space for the connecting collar, you can
disassemble it and connect the air structurally. You will position
the fireplace against or on a fresh air opening. Use a ceramic
cord to seal o the transition between the fireplace and the
constructed opening (optionally available).
Examples:
The fireplace is positioned against an opening to a cellar.
The fireplace is positioned against an outside wall, which
has an opening to the outside air.
Figure 18: Fresh air connection without connecting collar
Kalfire W connection set (optional)
A ceramic cord to fill gaps of a maximum 2 cm.
Metal strips for attaching the cord to the fireplace.
5.2.3 Alternative fresh air intake(s) Kalfire W53/50R
The Kalfire W53/50R has a standaard fresh air intake with a
diameter of Ø180 mm at the back of the fireplace. This fresh air
intake can be replaced by two intakes of Ø150 mm, by using an
optional “Airbox 2 x Ø150 mm”. Using this Airbox will not aect the
burning capacity. In some cases it may simplify the installation.
You need to order the Airbox 2 x Ø150 mm separately, with the
fireplace.
PLEASE NOTE! The Airbox 2 x Ø 150 mm cannot be
converted to the bottom of the unit. After the Airbox 2 x Ø
150 mm has been fitted, the total installation depth of the
fireplace will increase by 21 mm.
Ceramic cord
18
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