Glow-worm Micron 70FF - Manual (Page 26)

26 2000225229C
Diagram 10.4
7168
ELECTRICAL
PLUG
EXTENDED
SECURING
SCREWS (4)
SOLENOIDS
10 Replacement of Parts
SOLENOID
SECURING
SCREW
10.4 Control Board (PCB), Part No.
2000227135 - diagram 10.3
Remove casing, see Section 5.2.
Slacken control box securing screw, see diagram 5.10.
NOTE: To ease access the control box may be pulled away from
the boiler by removing the hinge pins, see diagram 5.10.
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 9.5.
Take care when replacing the control knob and extension by
supporting the potentiometer on the P.C.B.
10.5 Electrode
Remove casing, see Section 5.2.
Remove combustion chamber front cover, see diagram 10.5
Remove HT lead from electrode, see diagram 8.5.
Remove earth lead from electrode retaining bracket, see
diagram 8.5.
Remove electrode bracket by undoing screw and withdrawing
off locating pin, see diagram 8.5.
When refitting, check spark gap, see diagram 8.5.
10.6 Multifunctional Control, Part No. 230509
- 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 from the gas cock by removing the four extended
screws from the flanged connection at the right hand side.
Support the multifunctional control, disconnect from the manifold
by removing the tubing nut from the left 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 BS6891 or 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 Injectors, Part No. 205764
Remove the burner as Section 8.2.
Remove the injectors 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 10.5
SIDE INSULATION
12276
REAR INSULATION
SIDE INSULATION
FRONT INSULATION
7195
RETAINING
SCREW
Sides
Slide the insulation out.
Rear
With the side insulation removed the rear insulation can be
removed and replaced.