16
5.7. To replace pump
?
Drain down heating circuit of the boiler only, as
described previously.
Note :
It is not necessary to drain down entire heating
system to carry out this work.
?
Undo the two fixing nut at rearside and upside of
the pump.
?
Disconnect electrical connection from cable box of
pump, see diagram 36.
?
Re-connect electrical connection by take care of
cable phase, neutral and earth line to cable box of new
pump.
?
Fit replacement pump in reverse order to removal.
Note :
all washers must be fitted.
?
Open isolating valves on flow and return
connections; refill, vent and pressurise boiler.
?
Check for leaks.
5.8. To replace loss of water sensor
?
Drain down heating circuit of boiler only as
described previously.
Note :
It is not necessary to drain down entire heating
system to carry out this work.
?
Locate system pressure sensor at front left handside
of boiler, see diagram 9.
?
Remove electrical connections from sensor, see
diagram 37.
?
Remove the sensor by turning it in anticlockwise.
?
Fit replacement sensor in reverse order of removal.
Diagram 34
Diagram 35
Diagram 36
Diagram 37
Diagram 38
