1.7 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 / BS EN 1856-2, (for example the Selkirk
LFE 175 box). The box must have a minimum flue diameter of 125mm internal
and minimum internal dimensions of 300mm deep by 580mm high by 400mm
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.
1.8
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
300mm forwards from the fire opening. EFC models required an increased hearth
projection of 320mm forwards of the fireplace opening.
1.9
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.
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