Hearths - Standard Models; Pre-Cast Flue Installations; Spillage Monitoring System - Flavel Windsor Installation, Maintenance & User Instructions

1.8

HEARTHS - STANDARD MODELS

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 FITTING TO PRE-CAST FLUE INSTALLATIONS
When installing this appliance into pre-cast flues, always ensure that the
spigot restrictor baffle has been removed. This is held in place on the spigot
by 2 screws. To install the fire box in to pre-cast flue starter blocks, there
must be at least 135mm 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 135mm then a fire surround with a deeper rebate to
increase the depth to at least 135mm 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 135 mm to the
rear of the starter block, otherwise there will be insufficient depth. 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 BFM 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.
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.
1.10

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 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.
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