Firstly, remove the decorative facia assembly - this is the reverse of that described in section 8.4. Remove the inner glass panel,
and disconnect the gas connection inside appliance. The gas connections to the gas valve can now be released. Detach the burn-
er front cover plate by removal of the four retaining screws. Undo the four screws retaining the burner support brackets to the
base and rear of the firebox, and remove the control knob and spindle assembly by removal of the spindle retaining clip. The burn-
er may now be removed. Remove the pilot and main burner pipes and blow through to dislodge any debris. Now remove the
restrictor elbow and blow through to make sure it is entirely clear.
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 HT 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.
NEVER MODIFY OR BEND THE THERMOCOUPLE TO MAKE THE PILOT STAY ALIGHT.
Modifications are dangerous and can have serious unseen effects on safety. If the pilot will not stay lit there is a problem with dirt,
the gas supply to it, or the thermocouple needs replacement.
The gas valve is a non-serviceable item. If this needs replacement, remove M20 securing nut holding the valve in place, remove all
pipe unions, electrode lead, thermocouple lead and then the complete valve. Replacement must be original manufacturers parts.
Re-assembly is the reverse of removal. Ensure operating pressures are as stated in Section 2; Appliance Data.
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 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 dis-
card. Refit the new catalysts and seals in reverse order, ensure the catalysts and the glass door have good seals.
10.1 SERVICING THE BURNER UNIT AND GAS ASSEMBLY
10.2 PILOT ASSEMBLY
9
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2012 Pure Glow Limited
10.3 CATALYSTS
10. Turn on the gas supply and leak test. Check pilot and burner for good ignition.
11. Refit the glass door assembly, ensuring correct orientation and a good seal.
12. Refit the decorative facia/frame assembly as detailed in section 8.3.
13. Check the purpose provided ventilation is un-obstructed.
14. Light the fire and test operating pressures.
15. Check safe operation of the appliance by performing a combustion test as detailed in section 10.3.
For specific servicing instructions, see relevant sections.
10.0 SERVICING
- CONTINUED
GB IE
CO (%)
CO2 (%)
= ratio
