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1.7 FITTING TO PRE-CAST FLUE INSTALLATIONS
To install the fire box in to pre-cast flue starter blocks, there must be at least
100mm from the mounting face of the fire to the rear of the pre-cast flue
starter block to allow sufficient space for debris collection. It is important to
consider this depth when choosing a fire surround as the thickness of the fire
surround must be sufficient to give a total depth of at least 100 mm to the rear of
the starter block, otherwise there will be insufficient depth. It is important to
ensure that the pre-cast flue is in good condition and is free from extruded mortar
or sealant from between the flue blocks.
This appliance has been tested for use in a pre-cast flue block complying
with BS EN 1858. In accordance with BS EN 1858, pre-cast flues built with
directly plastered faces (front or rear) are not correctly installed as to ensure
proper operation with any type of gas fire. In some instances of this flue
construction, temperature cracking of surface plaster may occur through no
fault of the appliance. An air gap or some form of insulation material should
be installed to prevent normal flue temperatures from damaging wall
surfaces. IF FITTING TO A PRE-CAST FLUE SYSTEM, ALWAYS REMOVE THE
FLUE RESTRICTOR PLATE.
1.8 FITTING TO PRE-FABRICATED TWIN WALL METAL FLUE BOXES
The appliance may be fitted to twin wall metal flue boxes conforming to the
constructional requirements of BS 715, (for example the Selkirk LFE 125 box).
The box must have a minimum flue diameter of 125mm internal and minimum
internal dimensions of 100mm deep by 300mm high by 300mm wide. There are
no maximum dimensional requirements for the box. The top face of the box must
be insulated with a minimum thickness of 50mm of non-combustible mineral wool
insulation or similar material. The flue box must stand on a non-combustible base
of minimum thickness 12mm.
1.9
HEARTHS (IF SPECIFIED)
If fitting without a hearth panel, this appliance must only be installed at a minimum
height to the base of the opening of 160mm above the floor level, (measured from
the bottom edge of the "Kamina" fascia) e.g. above the level of the carpet or floor
covering.
If fitted using a conventional hearth panel, the distance from the top face of the
hearth panel to the bottom of opening / closure plate should be a minimum of
100mm
8
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