Installation us?ing a 5 Diameter Metal Flue Box
Important: The spigot restric?B? tmourst be fi marked tted. See page 7.
When the metal flue box is to be built-in as a false chimneybreast using the timber studwork with plasterboard facing, the
metal flue box should be enveloped with insulation material such as Rockwool or similar to prevent a build-up of heat
within the structure. Either an air gap of 75mm should be maintained between any combustible materials and any part of
the metal flue box or a minimum of 25mm of insulation material between the metal flue box and the combustible
material.
It is important that both the back panel and the appliance are sealed to the metal flue box to prevent any leakage of flue
products or reduction in the flue draught.
Installation of the Appliance
Check that the chimney conforms to the required specifications as previously stated. Examine the condition and carry out
any remedial work necessary, if the flue has been used for solid fuel it should be swept and a smoke test carried out to
check that satisfactory smoke clearance has been established. If all the smoke is not drawn into the flue, pre-heat the flue
with a blowtorch or similar and re-check. If there is any uncertainty examine for the cause and if necessary seek expert
advice.
GAS SUPPLY
BEFORE COMMENCING WORK, TURN OFF ANY APPLIANCES THAT ARE FED BY THE METER AND
ISOLATE THE GAS SUPPLY BY TURNING OFF AT THE METER
The gas connection to this appliance is made with 8mm o/d rigid or semi rigid tube to a combined pressure test/ restrictor
elbow situated on the R/H side of the burner. Provision is made i.e. knockout blanks for entry into the box in both L & R
hand rear corners and at the L & R hand sides. Any pipe used under the tray must be in rigid tube such as bundy, A
suitable piece of bundy is included in the fitting kit to assist the installer..
Where a concealed gas supply is used, the installer is reminded of the requirements of BS 6891 1988 dealing with
enclosed pipes. The Standard requires that when a gas pipe is fed through a wall, the pipe should be enclosed in a tight
sleeve to protect against failure caused by movement. It shall be constructed to prevent passage of gas either between the
pipe and sleeve or sleeve and wall.
Where a gas supply pipe enters the box in any of the positions stated, the hole around the pipe should be sealed with a
silicone sealant or similar to prevent Ingress of air into the flue. Permanent sealant e.g. fire cement etc should not be used
as these would prevent removal of the firebox.
Dismantling the fire Prior to Installing
It will be necessary to dismantle the burner from the firebox before installing the box in the opening.
To remove the burner from the box unscrew the two screws at the base of the fascia panel and lift the assembly
approximately 200mm at the front to clear the fixing flange. When refitting observe that the two feet at the rear of the
assembly locate under the two lugs formed in the base of the box assembly.
If the installation has either a 5in (125mm.) or 7in (175mm) flue if will be necessary to select the appropriate restrictor,
(See page 7). To insert the correct restrictor plate remove the centre screw securing the fibre retaining strip in position and
slacken off the two outer screws to allow the two slots in the restrictor plate to slide behind the two screw heads and
replace the centre screw and tighten the outer screws.
Important
THE RESTRICTOR PLATE 'A' AND 'B' (marked 1 dimple/2 dimples) MUST NOT BE USED WITH PRE-CAST
FLUES .
The restri?ctoA? mra rked with 1 dimple is for use with 7in (175mm) diameter f?B? mlauerks anded with 2 the restrictor
dimples is for use with 5in (125mm) diameter flues.
The appliance is supplied without any Flue Restrictor fitted in position i.e. suitable for pre-cast flues.
The correct fitting of the restrictor plate is carried out prior to installation. Seoe Fig 4. Two self-tap screws are provided t
hold the restrictor in position. The single dim?pAle ? pois sitiuppeon and rmost thefor doubthe le dimple uppermost for
the ?B? position.
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ACEC
CROSSLEE
