34
SERVICING
icos system -
Installation and Servicing
41 SERVICING SCHEDULE
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 at least 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
the top of the boiler (refer to Frame 43) or into the flue
terminal if access is possible (optional test).
For correct boiler operation the CO/CO
2
content 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,
then no further action need be taken. If not, proceed to
Step 4 but see note above.
4.
Clean the main burner.
5.
Clean the heat exchanger and 'S' trap.
6.
Check the condition of the combustion chamber
insulation. Any cracked/damaged pieces should be
replaced.
7.
Check the main injector for blockage or damage.
8.
Wherever possible remove and clean the condensate 'S'
trap (refer to Frame 47) 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 to 49 and MUST be carried out in sequence.
Note.
In order to carry out either servicing or replacement of
components the boiler front panel and sealing panel
must be removed. Refer to Frames 42 and 43.
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 2 and 3 above.
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 'S' has been
removed ensure that the trap is refilled with water before
reassembly.
13.
Complete the service section in the Benchmark
Commissioning Checklist.
42 BOILER FRONT PANEL REMOVAL
1.
Remove the 2 retaining screws from the
underside of the boiler.
2.
Pull the panel forward at the bottom and
lift to disengage it from the top lugs.
SER
VICING
200214-11.pmd
17/11/2006, 09:35
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