Potterton Osprey CF 125, Installation & Service Instructions Manual, Page: 20 / 30

4. Service & Replacement of Parts - Page 20
Read these: 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. Yellow flame and excessive lifting
indicate poor combustion.
WARNING: Before commencing work set the boiler standby switch 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.
Notes on Cleaning Boiler Components
Heat Exchanger
Place a sheet of paper under the heat exchanger (after removing the burner assembly) then using the brush (Supplied
with the boiler), 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 cleaning fluid.
Main Injectors
Omit this operation if the gas rate is correct, otherwise clean by blowing through. Do NOT clear the injectors with a pin
or wire.
Flue
Inspect the draft diverter and flue tube for blockage, condensation and integrity, rectify if necessary.