29
icos
-
Installation & Servicing
SERVICING
39 SERVICING SCHEDULE
8.
Wherever possible, remove and clean the condensate ‘S’
trap (refer to Frame 44) and check the drain for blockage.
9.
Check that the flue terminal is unobstructed and that the
flue system is sealed correctly.
The servicing procedures are covered more fully in Frames
42-44 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 40 and 41.
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.
10.
After completing the servicing or exchange of components
always test for gas soundness and carry out functional checks
as in paragraphs 2 and 3.
11.
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.
12.
If, for any reason, the condensate trap has been removed
ensure that the trap is refilled with water before
reassembling.
13
. 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 41.
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 condition of the combustion chamber
insulation. Any cracked or damaged pieces should be
replaced.
7.
Check the main injector for blockage or damage.
40 BOILER FRONT PANEL REMOVAL
41 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 2 screws.
4.
Pull the RH side of the panel down. Slide it to the right
and withdraw.
nm7808
SER
VICING
200212-10.pmd
9/5/2005, 8:58 AM
29
