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 (see section 8.3) and outer casing. The catalysts are located 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 pellet 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.
Fire sparks but pilot does not light • No gas to fire, check isolators are open and gas supply is on.
• Pipework blockage, clean out.
• Air not fully purged, re purge supply or wait longer.
• Spark earthing to metalwork, reset gap correctly.
• Blocked pilot, clean out internally.
Pilot lights but then goes out • Severe restriction in gas supply: clear obstruction.
• Faulty thermocouple, replace pilot unit.
• Blocked pilot, clean out.
• Blocked lint gauze, clean.
• Hold control knob in for longer.
• Check control knob does not foul indicator plate.
• If the pilot will not stay lit there could be a problem with contamination of the gas
supply, drafts, room size and/or ventilation or the thermocouple needs replacement.
Modifications are dangerous and can have a serious unseen effect on safety.
NEVER MODIFY OR BEND THE THERMOCOUPLE TO MAKE THE PILOT STAY ALIGHT.
Fire does not spark at pilot • HT lead detached, refit.
• Check the spark gap (see section 7.1).
• Faulty piezo unit, replace.
• Debris shorting out electrode, clean.
• Spark shorting to metalwork under tray, check routing of HT lead under burner.
Fire runs for a time • Loose or faulty thermocouple, rectify.
and then cuts off • Blocked pilot, clean out.
• Fire is sited in a draft.
• Door or window has been opened creating a draft.
• Wall on which fire is sited has a hole/holes through which there is a draft.
• Fire is too close the an air vent.
• Fire is sited on disused chimney breast which has not been adequately sealed up.
• Dirt or lint in pilot aeration hole or on the lint gauze, clean thoroughly.
• If the pilot will not stay lit there could be a problem with contamination of the gas
supply, drafts, room size and/or ventilation or the thermocouple needs replacement.
Modifications are dangerous and can have a serious unseen effect on safety.
NEVER MODIFY OR BEND THE THERMOCOUPLE TO MAKE THE PILOT STAY ALIGHT.
Pilot flame shrinks when • Poor gas flow to fire, check pressure with fire on high.
fire is on high • If pressure is low, remove any restriction in pipework or valve.
• Check all isolators are adequately sized and fully open.
• Check meter pressure is adequate.
• If the pilot will not stay lit there could be a problem with contamination of the gas
supply, drafts, room size and/or ventilation or the thermocouple needs replacement.
Modifications are dangerous and can have a serious unseen effect on safety.
NEVER MODIFY OR BEND THE THERMOCOUPLE TO MAKE THE PILOT STAY ALIGHT.
Fire smells when first lit or in use • Newness smell from brand new appliance.
• Leakage occurring. Carry out leakage test and rectify any problems.
• Combustible materials used in incorrect positions.
• Airborne substances such as cleaning materials/air fresheners are being drawn
through the fire.
• Other airborne contaminants such as dust, tobacco smoke, paint vapours.
9
© 2011 Focal Point Fires plc.
10.4 TESTING FOR FIREBOX LEAKAGE
CO (%)
CO2(%)
= ratio
10.3 CATALYSTS
GB IE
11.0 TROUBLESHOOTING GUIDE