CLEANING THE CERAMICS
Remove the fire front and place to one side. Remove the hood. Remove the glass door assem-
bly. Remove the ceramic components. Gently clean in the open air with a soft brush. Be care-
ful not to create dust from the ceramics. Where necessary replace damaged components with
genuine spares. Seal scrap ceramic components in plastic bags and dispose at proper refuse
sites as directed. If using a vacuum cleaner a HEPA filtering system is recommended.
Re-fit the ceramics by referring to the relevant section of these instructions. Refit the glass door
assembly ensuring a good seal. Refit the hood.
SERVICING THE BURNER TRAY AND GAS ASSEMBLY
Firstly, remove the hood and front fret, the glass panel and ceramics, and disconnect the gas
connection at the isolator elbow. Remove the burner tray by removing the 2 securing screws
through the legs. The gas connections to the gas valve can now be released. Remove the pilot
and main burner pipes and blow through to dislodge any debris. Remove the injector elbow and
blow through to make sure it is entirely clear.
When replacing the injector elbow, ensure that it aligned accurately with the centre of the mixer
tube entering the burner and is not at an angle. Always make sure that the nut securing the injec-
tor elbow is tight. Unclip the pilot lint gauze and clean with a soft brush. Clean the exterior of
the pilot assembly with a soft brush and blow through the flame ports on the pilot head. Check
the aeration holes are free from lint or dirt. The pilot assembly can be removed if required, by
disconnecting the electrode lead, gas pipe and unscrewing the mounting screws and lifting away.
The pilot assembly is a non-serviceable item and should not be taken apart. Aeration holes must
be absolutely clear internally for proper operation.
The gas valve is a non-serviceable item. If this needs replacement, remove the two M5 securing
screws and remove the complete valve. Replacement must be done using original manufacturers
parts.
Re-assembly in the reverse of removal.
PILOT ASSEMBLY
Remove the burner tray as detailed in the relevant section and pilot unit as described. Clean the
pilot assembly with a soft brush and blow through. Check the aeration holes are free of any dirt
or lint. Clean thoroughly internally. The connection can be removed from the base of the pilot
unit using two spanners to make cleaning easier. Do not damage or try to remove the pilot injec-
tor.
The unit is factory set and the only check necessary is to ensure the spark gap is correct. See
specifications for gas setting.
NEVER MODIFY OR BEND THE THERMOCOUPLE TO MAKE THE PILOT STAY ALIGHT. If the
pilot will not stay lit there is a problem with dirt, the gas supply, or the thermocouple needs
replacement. Modifications are dangerous and can have a serious unseen effect on safety and
therefore MUST not be done. Replacement must be done using original manufacturers parts.
CATALYTIC CONVERTER
It is recommended that the catalytic converter is inspected for signs of damage and dirt during
routine servicing procedures. The expected life of the catalyst is in excess of 11,000 hours (10
years of normal use). After this time the catalytic converter should be replaced.
If there are any deposits of dirt or soot on the catalyst they should be cleaned with a soft brush
and a vacuum cleaner. If removed for cleaning ensure the seals are in good condition before
replacing the catalytic converter. New seals will usually be required.
The performance of the catalyst may be checked using an analyser as follows. Any analyser used
should conform to BS7927 : 1998 + A1 : 1999.
Important: The temperature of the gases emmited by the catalytic converter is in excess of
400
o
C. Measuring gas of this temperature may damage some types of gas analysers. If in
doubt consult the equipment manufacturer.
12
13.2
13.3
13.1
13.4
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