43
SERVICING
excel HE -
Installation and Servicing
69 PRESSURE GAUGE REPLACEMENT
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1.
Refer to Frame 51.
2.
Remove the boiler front, side and sealing
panels. Refer to Frame 44 and 45. Put the
control box into the servicing position. Refer
to Frame 46.
3.
Unscrew the pressure gauge sensing pipe
retaining nut from the pressure relief valve.
4.
Remove the pressure gauge head from the
control panel front by depressing the plastic
retention clips.
5.
Fit the new pressure gauge and reconnect the
sensing head to the pressure relief valve.
6.
Re-assemble in reverse order.
7.
Check the operation of the boiler.
Refer to Frame 50 and 51.
68 CH AND DHW DIAPHRAGM REPLACEMENT
1.
Refer to Frame 51.
2.
Remove the boiler front, side and sealing
panels. Refer to Frame 44 and 45. Put the
control box into the servicing position. Refer
to Frame 46.
3.
Drain the boiler water circuit. Refer to Frame
67.
4.
Pull microswitch forward to disconnect from
diaphragm.
5.
Using a suitable tool, remove the four torx
screws retaining the diaphragm.
6.
Fit the new diaphragm and refit the
microswitch.
7.
Re-assemble in reverse order.
8.
Check the operation of the boiler. Refer to
Frame 50 and 51.
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