Glow-worm 23c - Manual (Page 39)

39 2000225000B
18 Replacement of Parts
18.20 Central heating pump head, refer to
diagram 18.12.
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 central heating water circuit of the boiler only, refer
to relevant part of diagram 18.1.
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 15.6.
• Undo four 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 in reverse order to removal.
• Check for leaks.
18.21 Filling system tap, refer to diagram
18.13.
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 only, refer to relevant part of diagram
18.1.
• Pull out slotted metal clip securing tap into housing, remove
tap.
• Pull out slotted metal clip and remove pipe from tap.
18.22 Reduced pressure zone valve (RPZ),
refer to diagram 18.13.
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 only, refer to relevant part of diagram
18.1.
• Pull out slotted metal clip securing pipe to RPZ.
• Pull out slotted metal clip securing RPZ into housing, remove
RPZ.
18.23 Boiler drain point, refer to diagram
18.14.
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 only, refer to relevant part of diagram
18.1.
Pull out slotted metal clip securing boiler drain valve into
housing, remove boiler drain valve.
Diagram 18.14
10007
➜
BOILER
DRAIN
VALVE
Diagram 18.13 10010
FILLING TAP
➜
➜
➜
➜
REDUCED PRESSURE ZONE VALVE (RPZ)
Diagram 18.12
10005
PUMP HEAD
PUMP
ELECTRICAL
CONNECTION
BOX
HEX HEAD
SCREW
(4 OFF)