Remove the burner unit as detailed in section 10.1, then remove the lint arrestor and pilot unit by using a screwdriver to remove
the retaining screws. 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 dismantle the pilot injector.
The unit is factory set and the only check necessary is to ensure the spark gap is correct. See specifications for gap 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. Replacements must be original man-
ufacturers parts. Re-assembly is the reverse of removal. Ensure operating pressures are as stated in Section 2; Appliance Data.
It is recommended that the catalysts are inspected for signs of damage and dirt during routine servicing procedures. The expect-
ed life of the catalysts is in excess of 11,000 hours (10 years of normal use). After this time the catalysts 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 catalyst. New seals will usually be required. The per-
formance of the catalysts may be checked using a combustion gas analyser as follows. Any analyser used should conform to EN
50379-3. Ignite the fire as per the operating instructions, and run at maximum setting for 15 minutes. Position gas sample probe
directly over the catalysts via the outlet grille, on top of the appliance. Record the carbon dioxide (CO2) concentration and then
the carbon monoxide (CO) concentration as displayed by the analyser - also noting the units in which the values are expressed.
Most analysers display carbon dioxide (CO2) concentrations in percentage (%) terms and carbon monoxide concentration in
parts per million (ppm) terms.
In order to calculate the combustion ratio for the appliance (CO/CO2) it is first necessary to express both gas concentrations
in terms of percentage. To convert from parts per million (ppm) to a percentage (%) divide the ppm figure by 10,000. Examples :
35ppm = 0.0035%, 15ppm = 0.0015%, 5ppm = 0.0005%. Now divide the concentration of carbon monoxide (CO) expressed in
percent by the concentration of carbon dioxide (CO2) to obtain the appliance combustion ratio.
The combustion ratio of the gasses emitted by the catalytic convertor should not exceed 0.0015.
If replacing, firstly, remove the decorative frame/glass facia (as described in section 8.3) and outer casing. The catalysts are locat-
ed on the top of the internal firebox and can be removed by unscrewing the retaining nuts securing the clamping plates. Remove
the catalysts their seals and discard. Refit the new catalysts and seals in reverse order, ensure the catalysts and the glass door have
good seals.
Appliances that are several years old or have been extensively dismantled should be checked for soundness. It is important that
all the products of combustion pass through the catalytic converter at the top of the firebox before leaving the appliance. The
firebox is heated by lighting for a few minutes to provide a flow through the firebox. The burner is then shut off and a smoke pel-
let or match introduced at the base of the fire underneath the burner tray. Large quantities of smoke will emerge from the top
of the appliance, but none should emerge from the joints or gasket faces, especially around the door. It is important to note that
the appliance can never be expected to be 100% smoke tight and small quantities of smoke may be seen in corners of joints and
gasket faces etc without affecting safety when the fire is in operation.
10.3 CATALYSTS
10.2 PILOT ASSEMBLY
GB IE
CO (%)
CO2 (%)
= ratio
10.4 TESTING FOR FIREBOX LEAKAGE
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2016 Focal Point Fires plc.
