Potterton Suprima 100L, Installation & Service Instructions Manual

Page: 22 / 100

Supplied By www.heating spares.co Tel. 0161 620 6677
Publication No. 5102696 22
4. To Service the Boiler & Component Replacement
• To ensure continued efficient operation of the appliance, it is recommended that it is checked and cleaned as
necessary at regular intervals.
• The frequency of servicing will depend upon the particular installation conditions and usage but in general once per
year should be adequate.
• It is the law that any service work must be carried out by a competent person who is C.O.R.G.I. Registered.
• Before servicing, fire the appliance and check that the flames are blue and stable. Yellow flame and excessive lifting
indicate poor combustion.
• WARNING: Before commencing work turn the temperature control knob to 'O' Off and allow the appliance to
cool, isolate the electricity supply.
• If the gas valve is to be removed turn off the gas supply at the appliance service cock.
• IMPORTANT: Always test for gas soundness after completing any servicing of gas carrying components and
carry out functional checks of controls.
• IMPORTANT: Ensure that the outer white case is correctly fitted and that the sealing strip fitted to the door is
forming a tight seal with the boiler casing.
Remember to fill in the Benchmark Log Book
Notes on Cleaning Boiler Components
Heat Exchanger: Place a sheet of paper under the heat exchanger then using a flat blade tool (Part No. 907736), scrape
the flueway fin surfaces in a downward movement. This will ensure that most of the deposits will be collected on the paper.
Burner: Brush the burner top and check that the flame ports are clear. Any blockage may be removed with a fine wire
brush. Turn the burner upside down and tap gently to remove any debris (Protect the electrode).
Electrode: If the electrode requires cleaning wipe the surface using a solvent.
Main Injector: Omit this operation if the gas rate is correct, otherwise clean by blowing through. Do NOT clear the injector
with a pin or wire.
Fan Assembly: Examine the fan impellor and carefully clean if necessary.
Flue: Inspect the flue terminal and flue/air tube for blockage and integrity, rectify if necessary.
4.1 General Access
Warning: Before starting work, open the controls cover and set the temperature control knob to 'O' Off. Isolate the electricity
supply and if a gas carrying component is to be removed, isolate the gas supply at the appliance service cock. Allow the boiler
to cool.
Important: Always test for gas soundness after completing any exchange of gas carrying components and carry out a
functional check of the controls.
Re-assemble all parts in reverse order.
1. Remove the securing screw and slide off the controls cover. Put safely aside.
To complete sections 4.3.3 to 4.3.15 perform the following:-
To Service the Boiler & Component Replacement