SECTION 3 -
SERVICING and CONVERSION
Important
BEFORE ATTEMPTING ANY SERVICING, ENSURE ISOLATING COCK IS TURNED OFF AND
THAT IT CANNOT BE INADVERTENTLY TURNED BACK ON.
ENSURE UNIT HAS ADEQUATELY COOLED PRIOR TO ANY MAINTENANCE.
WHEN WORK IS COMPLETED, CHECK UNIT PERFORMANCE IS CORRECT AND CARRY OUT ANY
NECESSARY ADJUSTMENTS AS DETAILED IN SECTION 1.
After carrying out any servicing or exchange of gas carrying components -
ALWAYS CHECK FOR GAS TIGHTNESS!
3.1 GAS CONVERSION CHECK LIST
CHANGE MAIN INJECTORS CHANGE PILOT INJECTORS
CHANGE CROSS LIGHTING INJECTOR MODIFY MULTIFUNCTIONAL CONTROL
CHANGE DATA PLATE
To convert from Natural to Propane gas, remove regulator mechanism. Replace with blanking plate
supplied with conversion kit.
To convert from Propane to Natural gas, remove blanking plate. Replace with regulator mechanism
supplied with conversion kit.
All relevant injectors to be changed to suit gas type. Adjust pressure. ( as detailed in Sections
1.8.&1.9)
3.2 BURNERS
Burners should be cleaned periodically to maintain maximum performance. These are best cleaned
with a soft wire brush. Blocked parts require to be cleared using a metal broach. Any material pushed into
burner should be shaken out via air inlet.
3.2.1 Removal of Burner Assembly
Turn off main gas supply to unit. Remove fixings that secure pilot and cross-lighter assemblies to
main burner and drop assemblies slightly. Disconnect compression joint above manifold. Remove
fixings that retain burner assembly front cross strap to side runners. Pull burner assembly forward
(approx. 25mm)
and drop it slightly to clear front cross strap. While supporting weight of assembly,
push it back to clear rear strap from runners and lower to withdraw. Replace in reverse order.
3.2.2 Removal of Pilot Burner
Isolate main gas supply to unit. Disconnect pilot supply pipe compression nut and remove pipe from pilot
burner. Withdraw injector. Undo thermocouple retaining nut and remove thermocouple from pilot burner.
Undo thermopile retaining nut and withdraw thermopile. Pull lead from spark electrode.
Undo nuts that secure pilot burner bracket to burner. Withdraw pilot burner assembly. Replace in
reverse order.
3.3 CLEANING THE INJECTORS
Injectors should be periodically cleaned using a wooden splinter or soft wire. Avoid use of metal reamers
as these may distort or increase size of orifice.
3.3.1 Removal of Main Burner Injectors
Isolate main gas supply.
Use a 10mm open-ended spanner to remove injector.
3.3.2 Removal of Pilot/Cross-Lighting Injectors
Isolate main gas supply. Undo pilot/cross lighter
supply pipe compression nut and remove pipe from pilot/cross lighter burner.
Withdraw injector. Replace in reverse order.
