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Diagram 20.12
Diagram 20.11
20 Replacement of Parts
30ci shown
30ci Only
9823
PUMP
HEAD
PUMP
ELECTRICAL
CONNECTION
BOX
HEX HEAD SCREW (4 OFF)
11936
FILLING TAP
➜
➜
➜
➜
REDUCED PRESSURE
ZONE VALVE (RPZ)
20.19 (30ci Only) Analogue Programmer, refer to
diagram 20.10.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Unclip control panel user interface and hinge forward . Do
not strain the cables.
• Disconnect the electrical connections from the programmer.
• Undo the two securing screws and remove the programmer.
20.20 Central heating pump head, refer to diagram
20.11.
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 central heating water circuit of the boiler only,
refer to relevant part of diagram 20.1.
Note: it is not necessary to drain down the entire heating
system to carry out this work.
• For ease of access if required remove the right hand side
panel, refer to Section 17.6.
• Undo four head fixing screws and remove pump head.
• Gain access to the pump electrical connection box and
remove cover.
• Disconnect pump cable from pump (avoid straining cables).
• Connect electrical connection to replacement pump head.
• Fit replacement pump head.
20.21 (30ci Only) Filling system tap, refer to diagram
20.12.
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 the hot water circuit only, refer to relevant part of
diagram 20.1.
• Pull of the filling loop tap extension.
• Pull out slotted metal clip securing tap into housing, remove
tap.
• Pull out slotted metal clip and remove pipe from tap.
20.22 (30ci Only) Reduced pressure zone valve (RPZ),
refer to diagram 20.12.
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.
• Pull out slotted metal clip securing pipe to RPZ.
• Pull out slotted metal clip securing RPZ into housing,
remove RPZ.
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