Glow-worm Xtramax - Manual (Page 43)

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20 Replacement of Parts
Diagram 20.19
➜
➜
➜
DOMESTIC HOT WATER
STORAGE VESSEL
UNION NUT
'T' PIECE
TOP SIDE
PANELS
SUPPORT
BAR
DOMESTIC HOT WATER STORAGE
VESSEL BRACKET
Diagram 20.18
DOMESTIC HOT WATER
EXPANSION VALVE
➜
➜
9650
9656
9652
9653
9654
20.33 Domestic Hot water storage vessel, 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 17.5.
• Remove R.H. side panel, refer to Section 17 6.
• Drain down central heating and domestic hot water circuits of
boiler only, see diagram 20.1.
• Remove central heating expansion vessel, refer to Section
20.20.
• Remove domestic hot water expansion vessel, refer to
Section 20.30.
• Remove air pressure switch, refer to Section 20.5.
• Undo and remove the two screws securing the top side panels
support bar, remove the bar.
• Disconnect the inline electrical plug connection to the domestic
hot water storage vessel thermistor. ( The thermistor is located
on the right-hand side of the domestic hot water storage
vessel ).
• Remove top and bottom union nuts to remove the domestic hot
water pump (avoid straining electrical cable), see diagram
20.15. (The pump is removed to take the weight off the
pipework).
• Undo couplings to remove temperature pressure relief valve,
see diagram 20.17.
• Undo union nut at 'T' piece to remove temperature pressure
relief valve over flow pipe.
• Undo the three couplings at the bottom of the domestic hot
water storage vessel.
• Remove the two retaining screws from the bottom domestic
hot water storage vessel bracket, see diagram 20.19.
• Lift vessel up and forward to remove.
• Fit replacement domestic hot water storage vessel.
• Fit replacement domestic hot water storage vessel thermistor,
refer to relevant parts of Section 20.3.