The “PP” burner is designed to allow quick and easy preventative maintenance.
The exact timing of service work to the “PP” burners can only be based on the working
environment of each specific installation, as a minimum however we would suggest that
the following service points are covered at least on a half yearly basis and should be
carried out by a suitably qualified or experienced person;
1. Remove spark electrode, clean with wire brush and check plug gap setting of 2.5 to
3mm. Inspect plug ceramic for any cracks or damage.
2. a. Remove flame sensing electrode, clean kanthol rod with emery paper and inspect
plug ceramic for any cracks or damage.
Or
b. Remove U.V. cell and clean bulb with clean cloth; do not touch the bulb itself.
3. Remove combustion fan motor and impellor, clear impellor blades of any blockage or
build-up of material drawn in by the fan.
4. Clear fan inlet guard of any blockage or restriction, if the combustion air is ducted to
the fan assembly then the duct should be removed to check for any blockage.
5. Remove back door to main burner body clear burner body of any dirt or debris which
has been drawn in by the combustion fan.
6. If the inside of the burner casing requires significant cleaning then the internal baffle
plate should also be removed and the area around the burner manifold and air wings
checked for build up or potential blockage, vacuum this area or blow out with
compressed air if necessary.
7. Check for free movement of the non-return valve flap inside the burner casing.
Suggested Service Program
Page 17
Comtherm Ltd
Installation & Maintenance Manual
Burners, Heaters & Combustions Systems
