Glow-worm Inset BBU50 - Manual (Page 24)

24 221723B
10 Replacement of Parts
Diagram 10.1
6192
IGNITION LEAD
THERMOCOUPLE
NUT
PILOT PIPE NUT
FLUE BLOCKAGE
SAFETY DEVICE SECURING
SCREW (2)
Notes.
a) Replacement of parts must be carried out by a
competent person.
b) Unless stated otherwise all parts are replaced in the
reverse order to that of removal.
c) After replacing any gas carrying parts always test for
gas soundness using a suitable leak detection fluid.
Also carryout functional check of controls.
d) Refer to the Gas Fire Installation Instructions for
details of the removal of the fire front.
e) Isolate the electrical supply to the back boiler.
f) Refer to diagram 6.1 to identify the back boiler
controls.
Turn the thermostat control knob clockwise to “0”, “Off” position.
Turn the appliance gas service cock anticlockwise to “0”, “Off”
position, see diagram 6.2.
10.1 Sensing Tube Assembly.
Refer to Section 8.2.
10.2 Flue Blockage Safety Device
Follow the instructions in Section 8.2 and 8.3 to remove the
sensing tube assembly and controls assembly and burner.
Refer to diagram 10.1.
Remove the ignition lead from the electrode.
Disconnect the thermocouple nut.
Disconnect the pilot pipe nut.
Remove the safety device securing screws.
Remove the safety device.
10.2 Thermocouple
Proceed as in Section 10.2.
Diagram 10.2
Diagram 10.3
6209
7472
THERMOCOUPLE NUT
PILOT
TUBING
NUT
SECURING
SCREW REAR HOOK
CONTROL
BOX LID
CONTROL BOX
INTERRUPTER
SECURING
SCREWS (4)
SECURING
SCREWS (4) ELECTRICAL
CONNECTIONS
GAS
CONTROL
VALVE
PLUG
10.3 Electrode
Proceed as in Section 10.2.
10.4 Ignition Lead
Remove the control box lid.
Remove the lead from the electrode.
Remove the lead from the control board (PCB).
When replacing make sure the lead passes through the grommet
in the rear of the control box and the protective silicone sleeve
is replaced.
10.5 Injector - Main Burner
Follow the instructions in Section 8.4 to remove the burner.
Replace the main injector, Ensure you fit the new copper
washer, see diagram 8.5.