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20 Replacement of Parts
20.30 Discharge safety valve, refer to diagram
20.19.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Undo discharge pipe union nut.
• Pull out slotted metal clip from valve body and remove valve.
20.31 (30ci Only) Three-way valve head, refer
to diagram 20.20.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Remove the gas control valve, refer to Section 20.28. (It will
not be necessary to remove gas control valve electrical
connections).
• 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.
20.32 (30ci Only) Three-way valve actuator,
refer to diagram 20.21.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Drain down the boiler only, refer to relevant part of diagram
20.1.
• Remove the gas control valve, refer to Section 20.28.
• Remove 3-way valve head, refer to Section 20.31.
• Remove the three way valve actuator, see diagram 20.21
Diagram 20.20
Diagram 20.19
Diagram 20.21
THREE WAY
VALVE/ BYPASS
HOUSING
➜
THREE WAY
VALVE
ACTUATOR
9785
30ci shown
30ci Only
30ci Only
10230
➜
THREE WAY
VALVE HEAD
➜
9794
PRESSURE
RELIEF
VALVE
➜
➜
10229
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