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•
Fit the replacement motor in reverse order ensuring the correct polarity of the
electrical connections
•
Open the isolating valves on the fl ow and return connections, refi ll, vent and re-
pressurise the water system to 1.5bar ensuring the pump union joints are sound.
In case of pump body damage:
•
Remove the motor as described above.
•
Remove the expansion vessel pipe connection 8
by releasing the clip on the pump body.
•
Remove the pressure switch connection as detailed
in section 18.12.
•
Disconnect the pumps outlet fi tting.(fi gure 38)
•
Remove the fi xing screws on the pump and
hydraulic block, located at the bottom right of the boiler.
(fi gure 39)
•
Remove the pump body assembly.
•
Detach the pump body from the hydraulic block
by removing the clip.
•
Fit the replacement body in reverse order ensuring that the pump washers are fi tted
and the correct polarity of the electrical connections is maintained.
•
Open the isolating valves on the fl ow and return connections, refi ll, vent and
re-pressurise the system ensuring the pump union joints are sound.
18.7 Primary Heat Exchanger and Burner
•
Read the notes at the head of this section before commencing any work
on the appliance.
•
Disconnect the pipes from the heat exchanger.
•
Release the union connections on the pump and hydraulic block, retaining the washers
for re-assembly.
•
Remove the pump, heat-exchanger and heat-exchanger three-way valve connecting
pipes.
•
Remove the burner as detailed in (17.7)
•
Remove the screws from the brackets retaining the exchanger.
33
Figure 38
Figure 39
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