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Remove the fixing screws on the pump and
hydraulic block, located at the bottom right
of the boiler. (figure 37)
Remove the pump body assembly.
Detach the pump body from the hydraulic
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block by removing the clip.
Fit the replacement body in reverse order
ensuring that the pump washers are fitted
and correct polarity of the electrical
connections.
Open the isolating valves on the flow and
return connections, refill, vent and re-
pressurise the system ensuring the pump
union joints are sound.
18.9 Secondary Heat Exchanger
Drain the boiler's hydraulic circuit as
detailed in 18.2.
Remove the two screws, which connect the
heat exchanger to the hydraulic block.
(figure 38)
Figure 36
Figure 37
Remove the heat-exchanger after removing the
diverter valve as described in section .
Fit the new heat exchanger and reassemble the
boiler in reverse order ensuring all washers are
fitted. (Replace and damaged washers or seals)
Open the isolating valves on the flow and
return connections, refill, vent and re-
pressurise the system ensuring all joints are
sound.
18.10 Primary Heat Exchanger and Burner
Drain the boiler's hydraulic circuit as detailed
in 18.2.
Disconnect the pipes from the heat exchanger.
Release the union connections on the pump
and hydraulic block, retaining the washers for
re-assembly, replace if damaged.
Remove the pump, heat-exchanger and heat-
exchanger three-way valve connecting pipes.
Remove the burner as detailed in 17.8.
Page 29
solaris 24PC, 30PC
Figure 38
Figure 39
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