WARNING
Do notblockthecatalystsortheapplianceoutletgrill. Blockage may cause high carbon monoxide levels and/or breakage of the glass facia panel.
WARNING
Do not operate the appliance with the catalyst units removed.
It is recommended that the catalysts are inspected for signs of damage and dirt during routine servicing procedures. The expected life of the catalysts is in excess of 11,000 hours (10 years of normal use). After this time the catalyst should be replaced.
If there are any deposits of dirt or soot on the catalysts 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 performance of the catalyst may be checked using a combustion gas analyzer as follows.
Important: The temperature of the gases emitted by the catalytic converters reach very high temperatures (up to 700° F). Measuring gas of this temperature may damage some types of gas analyzers. If in doubt consult the equipment manufacturer.
Turn on the fireplace as per the operating instructions, and run at maximum setting for 15 minutes. Position gas sample probe directly over a catalyst via the outlet Grill, on top of the appliance. Record the carbon dioxide (CO2) concentration and then the carbon monoxide (CO) concentration as displayed by the analyzer - also noting the units in which the values are expressed. Most analyzers 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 per centage. 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.
CO (%)
CO2 (%) = ratio
The combustion ratio of the gasses emitted by the catalytic convertor should not exceed 0.0015.
If replacing, firstly, remove the decorative fire frame as described in section 17.0. The catalysts are located on the top of the internal firebox and can be removed be unscrewing the retaining nuts securing the clamping plate. Remove the catalysts and the seals and discard.
Refit a new catalyst and seals in reverse order, ensure the catalyst and door have a 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 convertors 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 appliance is in operation.
24.0 CLEANING
WARNING
Turn off the unvented gas room heater and allow to cool before cleaning.
GLASS PANEL - This can be cleaned with a suitable glass cleaner. The following solutions are approved for use to clean glass.
•
•50%
•Gas fireplace/stove glass cleaner
PAINTED AREAS - These can be cleaned using a dry cloth.
STAINLESS STEEL AREAS - These can either be cleaned using a proprietary stainless steel metal cleaner or baby oil. Test on a small hidden part of the stainless steel before cleaning. Always clean in the direction of the grain.
12 | NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE |