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1.8 FITTING TO PRE-CAST FLUE INSTALLATIONS
To install the fire box in to pre-cast flue starter blocks, there must be at least 105mm from
the mounting face of the fire to the rear of the pre-cast flue starter block to allow sufficient
space for debris collection. If this dimension is less than 105mm then the spacer (optional) must
be used to increase the depth to at least 105mm from the mounting face of the fire. 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 128 mm to the rear of the starter block, otherwise there
will be insufficient depth. This can be reduced to 52mm if the optional black spacer is used. To
increase this depth the fire surround may be packed away from the wall using suitable non-
combustible board, providing the installation is correctly sealed. If in doubt about the suitability of
the fire contact CFM Europe Ltd. for advice before proceeding.
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.
1.9 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 380mm deep by 650mm
high by 480mm 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.
1.10 HEARTHS
This appliance must only be installed on to a concrete or non-combustible hearth. The hearth
material must be a minimum thickness of 13mm with the top surface at least 50mm above the
floor. The hearth must be fitted symmetrically about the fire opening and have a minimum width of
760mm and a minimum projection of 125mm forwards from the fire opening.
1.11 SPILLAGE MONITORING SYSTEM
This appliance is fitted with an atmosphere sensing spillage monitoring system in the form of an
oxygen sensing pilot. This is designed to shut the fire off in the event of a partial or complete
blockage of the flue causing a build up of combustion products in the room in which the fire is
operated. The following are important warnings relating to this spillage monitoring system.
1) The spillage monitoring system must not be adjusted by the installer.
2) The spillage monitoring system must not be put out of operation.
3) When the spillage monitoring system is exchanged only a complete original manufacturers part
may be fitted. It is not possible to replace individual parts on the pilot system on this appliance,
only a complete pilot assembly (including the thermocouple) may be fitted.
7
Supplied By www.heating spares.co Tel. 0161 620 6677
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