Potterton Suprima 30, Installation And Service Instructions Manual

Page: 25 / 37

To Service the Boiler & Component Replacement - Page 25
To complete sections 4.3.3 to 4.3.11 perform the
following:-
2. Remove the two screws securing the outer white
case to the chassis. Hinge forward, pull bottom
of cover forward and lift off. Put safely aside.
3. Remove the screw securing the combustion
chamber front to the heat exchanger and remove
the panel.
4.2 To Service the Boiler
1. Note how it fits and disconnect the tube from the
front of the fan housing.
2. Disconnect the 3 wires from the fan motor.
3. Remove the two screws securing the fan to the
flue hood. Carefully pull the fan down and away
from the flue hood.
4. Remove the flue hood.
5. Disconnect the electrode and earth wire.
6. Undo the fixing screw, hold the burner at the
right hand side and pull forward to disconnect
from the box.
If necessary, remove the injector as follows:-
7. Undo the two screws securing the side and rear
insulation assembly on the front of the chassis.
Pull the assembly forward and away from the
boiler.
8. Remove the burner bracket (three screws) to
give access to the injector.
9. Use a new sealing washer when re-fitting the
injector.
The heat exchanger, burner and fan can now be
inspected. If deposits have formed on these
items and on ancillary components clean as
detailed in the notes at the start of this section.
The boiler can be re-assembled in reverse order.
Ensure that any electrical connections are in
place and that any damaged seals or insulation
are replaced before re-fitting the controls cover.
Check the gas pressure, refer to Section 3
'Commissioning'.
Other Components
No other servicing is required on any other boiler
component.
4.3 Component Replacement
(see over page)
Warning
Before attempting to remove any component from the appliance first
disconnect the mains electricity supply by removing the plug from
the wall socket or by switching off the appliance at the external
isolating switch.
Notes
The 'O' (off) position on the boiler temperature control will leave
parts of the boiler Live.
If the appliance gas valve is to be removed it will be necessary to
isolate the gas supply at the appliance isolating valve.
Important
After removal or replacement of any gas carrying component a test
for gas soundness must be made and functional check of the
controls carried out.