Glow-worm Xtramax - Manual (Page 42)

42 4000116705-2
20 Replacement of Parts
Diagram 20.15
Diagram 20.16
11769
➜
➜
➜➜
➜ ➜
Diagram 20.17
TEMPERATURE PRESSURE
RELIEF VALVE
ELECTRICAL
CONNECTION BOX
DOMESTIC HOT WATER
EXPANSION VESSEL
RETAINING
NUT
PIPE
COUPLING
HEX-HEAD
RETAINING
SCREWS
(4OFF)
9649
9657
11770
20.29 Domestic hot water pump, refer to
diagram 20.15.
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 17.5.
• Drain down domestic hot water circuit of boiler only, see
diagram 20.1.
• Remove pump head from pump block by unscrewing and
removing the four hex-head retaining screws, remove and
support pump head to avoid straining electrical cable.
• Remove cover from the electrical connection box.
• Disconnect pump cable from pump.
• Fit replacement pump head.
20.30 Domestic Hot water expansion vessel,
refer to diagram 20.16.
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 17.5.
• Remove R.H. side panel, refer to Section 17.6.
• Drain down domestic hot water circuit of boiler only, see
diagram 20.1.
• Undo pipe coupling on domestic hot water expansion vessel.
• Unscrew and remove domestic hot water expansion vessel
retaining nut.
• Remove domestic hot water expansion vessel.
• Fit replacement domestic hot water expansion vessel.
20.31 Temperature pressure relief valve, refer
to diagram 20.17.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Drain down domestic hot water circuit of boiler only, see
diagram 20.1.
• Undo couplings to remove temperature pressure relief valve.
• Fit replacement temperature pressure relief valve.
20.32 Domestic Hot water expansion valve,
refer to diagram 20.18.
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 17.5.
• Drain down domestic hot water circuit of boiler only, see
diagram 20.1.
• Undo couplings to remove domestic hot water expansion
valve.
• Fit replacement domestic hot water expansion valve.
PUMP HEAD