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1.8.3
Fitting to Pre-Cast Flue Installations.
The pre-cast opening must be a minimum of 122.7cm 2 or
equivalent cross-sectional area and have a minimum effective flue
height of 3 metres. The flue spigot restrictor must be removed when
installing into pre-cast flue applications. 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.
1.9
HEARTH FITTING
This appliance must only be installed on to a level concrete or non-
combustible hearth. The feet must not be removed when installing
directly onto a hearth.The hearth material must be a minimum thickness
of 13 mm with the outer perimeter of the hearth panel at least 50 mm
above the floor level, to discourage the placing of carpet or other floor
coverings over it. The hearth must be fitted symmetrically about the
fire opening and have a minimum width of 760 mm and a minimum
projection of 350 mm forwards from the fire opening.
1.10
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 partial or complete blockage of the flue
causing a build up of combustion products in the room in which the fire
is operating. The following are important warnings relating to the
spillage monitoring system:
The spillage monitoring system must not be adjusted by the
Installer. The spillage monitoring system must not be put out of action.
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 the appliance, only a complete
pilot assembly (including thermocouple) may be fitted.
8
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