User manual

3. TO REPLACE THE IGNITER LEAD
4. TO REPLACE THE OXY-PILOT ASSEMBLY
The assembly is not an item that can he serviced as part of its calibration depends on the proximity of the
spark electrode and thermocouple tip it is replaced as follows: -
• Withdraw the burner assembly as detailed in 2.1 to 2.7
• Undo the tube nut and tube from the base of the pilot and the thermocouple from the tap/FSD.
• Remove the two screws securing the bracket to the framework. Replace the oxy-pilot assembly.
• Reassemble all the components in reverse order of removal ensuring that the solenoid lead is connected.
5. CLEANING THE PILOT
• Clean off any lint or fluff and clean the injector taking care to avoid damage. The gap between the
electrode and the thermocouple is that shown in Fig 22.
6. TO CLEAN OR REPLACE THE INJECTOR
• Withdraw the burner assembly as detailed in 2.1 to 2.2
• Undo the pilot supply and the thermocouple from the rear of the gas control and disconnect the HT lead
from the piezo igniter.
• Disconnect the burner supply by undoing the compression nut on the elbow injector. Now undo the two
securing screws at the front of the burner assembly to remove the control panel complete with tap and
piezo igniter.
• Pull the burner forward off the injector and remove the burner. Remove the two screws fixing the aeration
sleeve and remove the sleeve and aeration closure plate away from the injector noting its correct position.
Undo the injector elbow-securing nut and remove the injector.
• Clean or replace the injector ensuring that its securing nut is only finger tight to allow it its correct
orientation when connected to the burner supply pipe.
• Reassemble in reverse order of removal ensuring correct positioning of the aeration sleeve and closure
plate. Check for gas soundness.
Page 22
• Withdraw the burner assembly as detailed in 2.1
to 27
• Unplug the igniter lead from the electrode and
piezo igniter. Replace igniter lead.
• Reassemble all components in reverse order of
removal, check spark and ignition.