Glow-worm 24ci - Page 49

49
4000123942-2
Diagram 18.20
9848
➜
THREE WAY
VALVE HEAD
➜
9794
Diagram 18.19
PRESSURE
RELIEF
VALVE
➜
10018
Diagram 18.18
STEPPER
MOTOR
➜
➜
➜
GAS CONTROL
VALVE
18 Replacement of Parts
24ci only
24ci shown
18.29 Gas control valve stepper motor, refer to
diagram 18.18
Before starting refer to the front of Section 18 Important
information.
• Remove the front panel, refer to Section 15.3.
• Lower the control panel, refer to Section 15.4.
• Remove the gas control valve, refer to Section 18.28.
• Disconnect the electrical connection from stepper motor.
• Remove the two screws securing stepper motor to the gas
control valve.
• Fit replacement gas control valve stepper motor.
• Note: Take care not to damage the 'O' ring.
18.30 Discharge safety valve, refer to diagram
18.19.
Before starting refer to the front of Section 18 Important
information.
• Remove the front panel, refer to Section 15.3.
• Lower the control panel, refer to Section 15.4.
• Drain down the boiler, refer to relevant part of section 18.1
• Undo discharge pipe union nut.
• Pull out slotted metal clip from valve body and remove valve.
18.31 (24ci Only) Three-way valve head, refer
to diagram 18.20.
Before starting refer to the front of Section 18 Important
information.
• Remove the front panel, refer to Section 15.3.
• Lower the control panel, refer to Section 15.4.
• Remove gas control valve, refer to Section 18.28. (It will not
be necessary to remove the gas control electrical cables).
• Remove electrical plug from valve head.
• Pull out slotted metal clip from valve body and remove valve
head from body.
• Fit replacement valve head.
Note :
1) When refitting clip, ensure that letters YES are as shown.
2) It is not necessary to drain boiler to carry out this work.