1. Remove the two screws retaining the lower
front panel and remove the panel.
2. Remove the two screws retaining the upper
front panel.
3. Lift the upper front panel and remove.
PLEASE NOTE:
maintenance or change of part of the combustion circuit, the
The integrity of the boiler combustion circuit and the relevant seals.
rate. Refer to Frame 40.
1. Light the boiler and carry out a pre-service check, noting any
operational faults.
2. Check the gas consumption.
3. Connect a suitable gas analyser to the sampling point on top
Refer to Frame 46.
should not be greater than 0.004 ratio. If the combustion
Competence to carry out the check of Combustion
Performance
maintenance of Gas Fired boiler of rated input not exceeding 70
analyser and the interpretation of the results;
in accordance with the analyser manufacturers’ requirements.
completion of the CPA1 ACS assessment, which covers
the use of electronic portable combustion gas analysers in
accordance with BS 7967, parts 1 to 4.
4. Clean the main burner.
5. Clean the heat exchanger and ‘S’ trap.
6. Check the condition of the combustion chamber insulation.
Ionisation probes are a servicable component and require
inspecting annually and replacing if distorted.
7. Check the main injector for blockage or damage.
8. Wherever possible, remove and clean the condensate ‘S’ trap
(refer to Frame 48) and check the drain for blockage.
9.
system is sealed correctly.
10.
The servicing procedures are covered more fully in Frames
46 to 50 and MUST be carried out in sequence.
Note. In order to carry out either servicing or replacement of
components the boiler front panels, and sealing panel must be
removed. Refer to Frames 44 and 45.
WARNING.
Always turn off the gas supply at the gas service
cock, and switch off and disconnect the electricity
supply to the appliance before servicing.
IMPORTANT.
11. After completing the servicing or exchange of components
always test for gas tightness and carry out functional checks
as in paragraphs 2 and 3.
12. When work is complete the sealing panel MUST be correctly
DO NOT OPERATE THE BOILER IF THE SEALING PANEL
IS NOT FITTED.
13. Complete the service section of the Benchmark Commissioning
Checklist.
SERVICING
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