32
SERVICING
excel HE -
Installation and Servicing
43 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 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 5.
4.
Clean the main burner.
5.
Clean the heat exchanger.
6.
Check the condition of the combustion chamber insulation.
Any cracked or damaged pieces should be replaced.
7.
Check the main injectors for blockage or damage.
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
40 and 41 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 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.
9.
After completing the servicing or exchange of components
always test for gas soundness and carry out functional
checks in 3 and 4 above.
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.
12.
Complete the service section of the Benchmark
Commissioning Checklist.
42 HANDING OVER
6.
Explain and demonstrate the function of time and
temperature controls, radiator valves etc., for the economic
use of the system.
7.
If a programmer is fitted draw attention to the Programmer
Users Instructions and hand them to the householder.
8. Loss of system water pressure
Explain that the dial on the boiler control panel indicates the
central heating system pressure and that if the normal COLD
pressure of the system is seen to decrease over a period of
time then a water leak is indicated. In this event a registered
local heating installer should be consulted.
WARNING.
Do not fire the boiler if the pressure has reduced to zero from
the original setting.
9. After installation and commissioning please complete the
commissioning Checklist before handover to
the customer.
For IE it is necessary to complete a
“Declaration of Conformity” to indicate compliance to I.S.
813:2002
10. IMPORTANT
A comprehensive service should be carried out ANNUALLY.
Stress the importance of regular servicing by a CORGI
registered installer. In IE servicing work must be carried out
by a competent person.
11.
As the installer you may wish to undertake the service
contract yourself or alternatively offer to the customer the
benefits of the Ideal Care Scheme, details of which are
outlined in the householder pack supplied with this boiler.
1.
Hand the User Instructions to the householder and
explain his/her responsibilities under the relevant
national regulations.
2.
Explain and demonstrate the lighting and shutting
down procedures.
3.
The operation of the boiler and the use and adjustment
of all system controls should be fully explained to the
householder, to ensure the greatest possible fuel
economy consistent with the household requirements
of both heating and hot water consumption.
Advise the User of the precautions necessary to prevent
damage to the system and to the building, in the event
of the system remaining inoperative during frosty
conditions.
4.
Explain the function and the use of the boiler heating
and domestic hot water controls.
Explain that due to system variations and seasonal
temperature fluctuations DHW flow rates/temperature
rise will vary, requiring adjustment at the draw off tap. It
is therefore necessary to draw the users attention to the
section in the Users Instructions titled “Control of Water
Temperature” and the following statement:
“Additionally, the temperature can be controlled by
the user via the draw-off tap: the lower the rate the
higher the temperature, and vice versa”
.
5.
Explain the function of the boiler fault mode.
Emphasise that if a fault is indicated, the boiler should
be turned off and a CORGI registered local heating
installer consulted. In IE contact a competent person.
After completing the installation and commissioning of the system the
installer should hand over to the householder by the following actions:
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