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SECTION 6 SERVICING INSTRUCTIONS
6.1
GENERAL
To ensure the continued safe and efficient opera-
tion of the appliance, it is recommended that it is
checked and serviced at regular intervals.
The frequency of servicing will depend upon the
particular installation conditions, but in general,
once per year should be adequate.
It is the law that any servicing work is carried out
by competent person such as a Vokera engineer,
an approved service agent or Bord Gais.
The following instructions apply to the appliance
and its controls, but it should be remembered
that the central heating and the domestic hot
water systems will also require attention from time
to time.
6.2
ROUTINE ANNUAL SERVICING
Check the operation of the appliance and ensure
it functions as described in section 7. Compare
the performance of the appliance with its design
specification. The cause of any noticeable dete-
rioration should be identified and rectified without
delay.
Thoroughly inspect the appliance for signs of
damage or deterioration especially the flue sys-
tem and the electrical apparatus.
Check and adjust - if necessary - all burner
pressure settings (see section 7.3).
Check and adjust - if necessary - the system
design pressure (see section 5.10).
Carry out an analysis of the flue gases (see 7.4)
and visually check the condition of the entire flue
assembly. Compare the results with the appli-
ance design specification. Any deterioration in
performance must be identified and rectified with-
out delay.
Ensure both flue venturis are clean and free from
any debris or obstruction.
Ensure both the burner and heat exchanger are
clean and free from any debris or obstruction.
Inspect all joints for signs of leakage and repair if
necessary.
Refer to the commissioning section and/or re-
placement of parts section for detailed instruction
if required.
6.3
REPLACEMENT OF COMPONENTS
Although it is anticipated that this appliance will
give years of reliable, trouble free service, the life
span of components will be determined by factors
such as operating conditions and usage. Should
the appliance develop a fault, the fault finding
section will assist in determining which compo-
nent is malfunctioning.
6.4
COMPONENT REMOVAL PROCEDURE
To remove a component, access to the interior of
the appliance is essential. Isolate the appliance
from the electrical supply and remove the fuse.
And when necessary, close all service valves on
the appliance, remove the appliance casing as
described in section 4.8.3, drain the water con-
tent from the appliance via the appliance drain
valve or safety valve. Ensure some water absorb-
ent cloths are available to catch any residual
water that may drip from the appliance or re-
moved component. Undertake a complete com-
missioning check as detailed in section 5, after
replacing any component.
ALWAYS TEST FOR
GAS SOUNDNESS IF ANY GAS CARRYING
COMPONENTS HAVE BEEN REMOVED OR
DISTURBED.