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GB
96
RECESSING THE INSERT
Recessing the insert
When recessing the insert, adjacent walls that are not classed
as fire walls, or are considered unsuitable for heat loads must
be protected by non-combustible material according to the
specification below.
All joints on the non-combustible material must be sealed using
the manufacturer's recommended method. The area between
the insert and the recess must be ventilated according to the
specification/dimension diagrams on page 98
Material requirements
The building material must not be combustible.
The thermal conductivity coefficient
W/mK.
The thickness of the building material must always be at least 100
mm.
In cases where the building material's insulation properties are
given as a U-Value, this must be a maximum of 1.4 W/ m²K.
Sealing
If the recess is to extend to the ceiling, a seal must be made above
the convection exhaust. This is to prevent hot air collecting in the
recess closest to the ceiling. The seal must a maximum of 100 mm
Convection air
The convection air ventilates the surround, cools the insert and
transports the hot air out into the room. The effective cross
section area on the air intake and exhaust must not be less than
the stated values. The air intake must be positioned somewhere
between the floor and the bottom of the insert, at the front or
on the sides of the recess. The vent must be positioned above the
insert's highest point at the front or to the sides of the recess.
If the air intake respectively the vent is positioned on the sides,
the areas for the left respectively right sides must be the same
size to ensure the insert is evenly cooled.
Observe the minimum distance up to the ceiling (see diagram on
page 98).
Service
Access to the damper and counterweight must be ensured via
doors or ventilation grilles in the surround.
Connector
Rotating connector, can be turned 180° to be centred over the
insert, see drawing on page 5.
λ
may be a maximum of 0.14
When connecting a steel flue, please refer to the particular
manufacturer's installation instructions. Observe the safety
distance to combustible material required by the steel flue Heat
radiation from the hatch is strong and is why combustible material
must not be placed closer than 1.5 m in front of the hatch. When
recessing, building material must not be in direct contact with the
insert due to the thermal expansion of the insert.
Note that building regulations apply regarding the area below and
in front of the insert, see section "Hearth plate".
List of suitable materials:
λ
Aerated concrete
= 0,12-0,14
λ
Vermiculite
= 0,12-0,14
λ
Calcium silicate
= 0.09
above the convection exhaust's upper edge and must be made up
of 20 mm thick building boards made of calcium silicate or a panel
with at least a 50 mm thickness of rock wool on top.
Convection air in: 600 cm²
Convection air out: 600 cm²
If the convection outlets are directed upwards the following
applies
- the recess must be free-standing or placed against a
non-combustible wall.
- the distance from the air outlet to combustible roof must be at
least 750 mm.
Note that building regulations apply regarding the area below and
in front of the insert, see section "Hearth plate".
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