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Installation & Servicing
SERVICING
44 SERVICING SCHEDULE
8.
Check that the flue terminal is unobstructed and that the
flue system is sealed correctly.
The servicing procedures are covered more fully in Frames
44-68 and MUST be carried out in sequence.
Note.
In order to carry out either servicing or replacement of
components the boiler front panel, bottom panel and sealing panel
must be removed. Refer to Frames 45 and 46.
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.
9.
After completing the servicing or exchange of components
always test for gas soundness and carry out functional checks
as in paragraphs 2 and 3.
10.
When work is complete the sealing panel MUST be correctly
refitted, ensuring that a good seal is made.
DO NOT OPERATE THE BOILER IF THE SEALING
PANEL IS NOT FITTED.
11
. Complete the service section in the Benchmark
Commissioning Checklist.
To ensure the continued safe and efficient operation of the
appliance it is recommended that it is checked at regular intervals
and serviced as necessary. The frequency of servicing will depend
upon the installation condition and usage but should be carried
out annually. It is the law that any service work must be carried
out by a CORGI registered installer. In IE service work must be
carried out by a competent person.
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 of the boiler or into the flue terminal, if access is
possible. Refer to Frame 46.
For correct boiler operation the CO/CO
2
ratio of the flue
gas should not be greater than 0.004 ratio. If this is the
case, and the gas input is at least 90% of the nominal,
once compliance with the note above is ensured, then no
further action need be taken. If not, proceed to step 4 .
4.
Clean the main burner.
5.
Clean the heat exchanger and ‘S’ trap.
6.
Check the main injector for blockage or damage.
7.
Wherever possible, remove and clean the condensate ‘S’
trap (refer to Frame 49) and check the drain for blockage.
45 BOILER FRONT PANEL REMOVAL
46 BOILER SEALING PANEL/
BOTTOM PANEL REMOVAL
1.
Remove the 2 screws from the underside of the
appliance.
2.
Pull the front panel forward at the bottom and lift to
disengage it from the top lugs.
1.
To remove the sealing panel remove the 4 screws.
2.
Remove the panel.
3.
To remove the bottom panel remove the 4 screws.
nm8171
nm8145
3
SER
VICING
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