Glow-worm Ultrapower sxi Range - Manual (Page 61)

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15.15 Central Heating Pump
For access, refer to section 15.1.
Drain the boiler heating circuit, see section 15.1.
Unscrew the union nut of the return pipe to the pump
connection, see diagram 15.11.
Unscrew the union nut from the safety discharge valve.
Remove the flexible connection from the CH pump, see
diagram 15.7.
Disconnect the electrical connections inside the control box to
the main PCB, see diagram 15.11.
Remove the securing screw from the pump retaining bracket
and ease off the bracket from the spigot on the rear of the
pump.
Remove the pump retaining clip.
The pump can now be pulled sidewards away from its three
way valve connection.
When re-fitting, ensure that all seals are in place.
Always vent the pump after re-fitting.
15.16 Three Way Valve
For access, refer to section 15.1.
Remove the CH pump, refer to section 15.15.
Refer to diagram 15.12.
Remove the electrical plug.
Undo the CH inlet connection at the union nut between the
boiler module and the tank module, remove the connector
locknut.
Remove the retaining clip.
Remove the three securing screws.
Carefully remove the three way valve assembly.
15 Replacement of Parts
15.17 Domestic Pump
For access, refer to section 15.1.
Drain the boiler domestic water circuit, see section 15.1.
Remove the domestic expansion vessel and place in its
service position, see diagram 13.6.
Disconnect the electrical connection from the main PCB, see
diagram 15.13.
Unscrew the union nut at the pump top connector to the DHW
pipe.
Unscrew the pipe union nut from the bottom pump connection,
see diagram 15.13.
Remove pump securing clip at the bottom pump connection.
The pump can now be lifted up and clear of the boiler.
Remove the pump top and bottom connectors making note of
the orientation of the top connection.
When re-fitting the top and bottom connectors ensure that
the rubber seals are in place and that the top connector is
orientated correctly, with the DHW pipe connection at 90 O to
the pump axis.
When re-fitting any part, ensure that all seals and clips are in
place.
Always vent the pump after re-fitting.
After replacing parts open the cold-water isolation valve and
slowly open a hot water tap to remove air. Close the hot water
tap and check for any leaks.
3 WAY
VALVE
RETAINING
CLIP
ELECTRICAL
PLUG
SECURING
SCREW (3 OFF)
CH PUMP
CH INLET
CONNECTION Diagram 15.12
13410
DOMESTIC
PUMP
SECURING
CLIP
BOTTOM
PUMP
CONNECTOR
UNION
NUT
ELECTRICAL
CONNECTION
UNION
NUT
UNION
NUT
TOP PUMP CONNECTOR
13336
Diagram 15.13