Heat Shield - Contura C i4 Installation Instructions Manual

GB
86 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 manufacture's recommended method. The area between the insert
and the recess must be ventilated according to the specification/dimension.
When top connecting a steel flue please refer to the relevant manufacturer's installation instructions. Observe the safety distances to
combustible material that steel flues require. Heat radiation from the hatch is strong and is why combustible material must not be placed
closer than 1 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.
Material requirements
The building material must not be combustible.
The thermal conductivity coefficient
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.
List of suitable materials:
λ
Aerated concrete: =0.12-0.14
λ
Vermiculite: =0.12-0.14
λ
Calcium silicate: =0,09

Heat shield

If the recess is to extend to the ceiling, a heat shield 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 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
The convection air ventilates the surround, cools the insert and transports the hot air out into the room. The total sum of the effective
cross section area up and down must not be less than the stated values. The air intake must be positioned somewhere between the floor
and the bottom of the insert, up to or on the sides of the recess. The vent must be positioned above the insert's highest point up to or to
the sides of the recess.
Observe the minimum distance up to the ceiling.
Convection air in: 200 cm²
Convection air out: 200 cm²
Note that building regulations apply regarding the area below and in front of the insert, see section "Hearth plate" below.
Load bearing base
Ensure that the bottom of the convection box is installed on a loadbearing with the strength to support the weight of the insert and the
chimney. The insert can be loaded maximum 100 kg of chimney. The load bearing must not prevent the convection air ventilate the area
between the insert and recsess.
Hearth plate
Due to the risk of falling embers, a flammable floor must be protected by a hearth plate. It must extend 300 mm in front of the stove
and 100 mm on each side of the stove, or have a 200 mm extension on each side of the opening. The hearth plate can consist of natural
stone, concrete, metal plate or glass, consult the Building regulations.
λ
may be a maximum of 0.14 W/mK.