Glow-worm Micron 40FF - Manual (Page 26)

26 221911E
10 Replacement of Parts
Carefully pull the control knob and extension piece away from
the PCB.
Carefully pull the board away from its supports.
Disconnect the electrical plugs by slightly bending back the
retaining latches to allow withdrawal.
Disconnect the HT lead and spark earth lead.
When refitting refer to wiring diagram 9.4.
Take care when replacing the control knob and extension by
supporting the potentiometer on the P.C.B.
NOTE: Ensure jumper is in position 'A', refer to wiring diagram
9.4.
10.5 Electrode, Part No. 202635
Proceed as Section 8.2.
Remove burner from combustion chamber, refer to Section 8.2.
To remove the electrode, unscrew the retaining bracket, see
diagram 8.6.
Take the electrode out from below.
When removing and replacing the electrode take care not to
damage it.
When refitting, check spark gap, see diagram 8.6.
10.6 Multifunctional Control, Part No. 230512
- diagram 10.4
Gain access as Section 5.2 .
Slacken control box securing screw, and swing out the control
box, see diagram 5.10.
Disconnect the electrical plug.
Disconnect the gas cock, on the left hand side.
Support the multifunctional control, remove the four extended
screws from the flanged connection at the right hand side.
Remove and discard the original “O” ring from the flanged
connection and fit the new “O” ring supplied, into recess, before
fitting the replacement multifunctional control.
After assembly test for gas soundness and purge in accordance
with the current issue of BS6891or in IE, the current edition of
I.S.813 "Domestic Gas Installations".
10.7 Solenoid - diagram 10.4
Remove the electrical plug from the multifunctional control.
Remove the securing screw and then the solenoid assembly.
10.8 Burner
Remove the burner as Section 8.2.
10.9 Injector, Part No. 205757
Remove the burner as Section 8.2.
Remove the injector as Section 8.4.
10.10 Insulation - diagram 10.5
Combustion Chamber Front
Gain Access as Section 5.2.
Remove the combustion chamber front, then the insulation.
Diagram 10.4
12183
ELECTRICAL
PLUG
EXTENDED SECURING
SCREWS (4)
SOLENOID
SECURING SCREW
SOLENOIDS
CHAMFER
Diagram 10.5
FRONT INSULATION
RETAINING
SCREW
SIDE INSULATION
REAR INSULATION
6788
6789
SIDE INSULATION
'A'
VIEW ON 'A'
CHAMFER
Sides
Slide the insulation out. Make note of position of chamfer on
insulation pieces i.e. Left hand: chamfer bottom front. Right
hand: chamfer top rear, see diagram 10.5.
Rear
With the side insulation removed the rear insulation can be
removed and replaced.