Thermopile
Pilot Burner
Spark Electrode
Thermocouple
SECTION 3 - SERVICING and
CONVERSION
Important
BEFORE ATTEMPTING ANY SERVICING,
ENSURE THAT THE ISOLATING COCK IS
TURNED OFF AND THAT IT CANNOT BE
INADVERTENTLY TURNED BACK ON.
AFTER ANY SUCH MAINTENANCE TASK, CHECK
THE APPLIANCE TO ENSURE CORRECT
PERFORMANCE 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 SOUNDNESS!
3.1 GAS CONVERSION CHECK LIST
CHANGE MAIN INJECTORS
CHANGE PILOT INJECTORS
CHANGE MULTIFUNCTIONAL CONTROL
CHANGE DATA PLATE
CHANGE CROSS LIGHTING INJECTOR
3.2 REMOVAL OF CONTROL PANEL
Pull off the thermostat knob and undo the fixings.
3.3 BURNERS
Burners should be cleaned periodically to maintain
maximum performance. These are best cleaned with
a wire brush with blocked parts requiring to be
cleared using a metal broach. Any material pushed
into burner should be shaken out via the air inlet.
3.3.1 Removal of Burner Assembly
Turn off main gas supply to unit. Remove fixings
which secure pilot assembly to main burner and drop
pilot assembly slightly. Disconnect compression joint
above manifold. Remove fixings which retain burner
assembly front cross strap to side runners.
Pull burner assembly forward an inch (approx.) and
drop slightly to clear front cross strap.
While supporting weight of burner assembly, push
this back to clear rear strap fromrunners, lower and
withdraw assembly. Replace in reverse order.
3.3.2 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 HT lead from spark electrode.
Undo nuts which secure pilot burner bracket to
RH main burner. Withdraw pilot burner assembly.
Replace in reverse order.
Figure 2
3.4 CLEANING THE INJECTORS
Injectors should be periodically cleaned using a
wooden splinter or soft wire. Avoid using metal
reamers as these may distort or increase the orifice
size.
3.4.1 Removal of the Main Burner Injectors
Isolate main gas supply.
Use a 10mm open-ended spanner to remove injector.
3.4.2 Removal of Pilot and
Cross-Lighting Injectors
Isolate main gas supply.
Undo pilot supply pipe compression nut and remove
pipe frompilot burner. Withdraw injector.
Replace in reverse order.
3.5 FLAME FAILURE THERMOCOUPLE
Undo nuts at pilot assembly and valve body.
Disconnect safety thermostat wires at thermocouple
interrupter.
3.6 PIEZO IGNITER/SPARK ELECTRODE
The igniter is of the piezo spark type and the device
comprises generator housing, lead and electrode.
The lead has a push-on connection at either end and
the ignition button projects downward fromthe
bracket mounting. This is secured to the inner front
wall, inside the door, as follows:
G1808X - LH side
G1838X - RH side
G1848X - LH & RH sides
3.6.1 Removal of Igniter Generator
Remove igniter lead connection to generator.
Undo fixings which secure generator flange to control
compartment wall and remove device. Replace in
reverse order.
3.6.2 Removal of Electrode
Remove igniter lead connection from electrode nut
located below pilot burner bracket. Tilt electrode
slightly to clear pilot burner hood and withdraw
upward frompilot burner bracket. Replace in reverse
order.
