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SECTION 6
SERVICING INSTRUCTIONS
6.1 GENERAL
Once the appliance has been serviced, the benchmark
Service Record must be completed.
For UK only: It is important that the Benchmark Service
Record is correctly completed and handed to the user.
Failure to install and commission the appliance to the
manufacturers instructions will invalidate the warranty.
To ensure the continued safe and efficient operation of
the appliance, it is recommended that it is checked and
serviced at regular intervals. To ensure correct and safe
operation of the appliance, it is essential that any worn or
failed component be replaced only with a genuine Vokera
spare part. It should be remembered that although cer-
tain generic components may look similar, they will be
specific to an individual appliance or product range. Use
of non-genuine Vokera spare parts could invalidate your
warranty and may pose a potential safety hazard. The
frequency of servicing will depend upon the particular
installation conditions, but in general, once per year
should be sufficient. It is the law that any servicing work
is carried out by competent person such as a Vokera
engineer, an approved service agent, British Gas,
CORGI registered personnel or other suitably qualified
personnel. The following instructions apply to the appli-
ance and its controls, but it should be remembered that
the central heating and the domestic hot water systems
would 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
deterioration should be identified and rectified without
delay.
• Thoroughly inspect the appliance for signs of damage
or deterioration especially the flue system and the
electrical apparatus.
• Check and adjust – if necessary – all burner pressure
settings (see 7.4).
• Carry out an analysis of the flue gases (see 7.5), and
visually check the condition of the entire flue assembly.
• Compare the results with the appliance design specifica-
tion. Any deterioration in performance must be identified
and rectified without delay.
• Check that the burner and main heat exchanger are
clean and free from any debris or obstruction.
• Check and clean – if necessary – the condense trap
to ensure correct operation.
6.3 REPLACEMENT OF COMPONENTS
Although it is anticipated that this appliance will give years
of reliable, trouble free service, the life span of compo-
nents 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 component is malfunctioning.
6.4 COMPONENT REMOVAL PROCEDURE
To remove a component, access to the interior of the
appliance is essential and it's therefore necessary to
remove the appliance casing (4.7). Isolate the appliance
from the electrical supply and remove the fuse. And when
necessary, drain the appliance and heating system. En-
sure some water absorbent cloths are available to catch
any residual water that may drip from the appliance or
removed component. Undertake a complete commis-
20
sioning check as detailed in section 5, after replacing
any component.
ALWAYS TEST FOR GAS TIGHT NESS IF ANY GAS
CARRYING COMPONENTS HAVE BEEN REMOVED
OR DISTURBED.
6.4.1 AIR BOX SIDE COVER REMOVAL (fig. 23)
To gain internal access to the appliance you must first
remove the casing, proceed as outlined below:
• Locate and remove the 4-elongated nuts at corner
of the on the casing using a screwdriver or suitable
spanner/socket.
• If it's necessary to remove the air box side cover, locate
and remove the 2 securing screws.
Fig. 23
6.5 AUTOMATIC AIR RELEASE VALVE (fig. 24)
Carry out component removal procedure as described
in 6.4.
Remove the drain pipe (A). Unscrew the top AAV. Replace
in the reverse order. Loctite or similar should be used as
a thread sealant for the AAV.
6.6 PRIMARY THERMISTOR (fig. 1)
Carry out component removal procedure as described
in 6.4. Unclip the primary thermistor from the flow outlet
pipe. Disconnect thermistor electrical plug. Replace in
the reverse order.
6.7 RETURN THERMISTOR (fig. 1)
Carry out component removal procedure as described in
6.4. Unclip the return thermistor from the return inlet pipe.
Disconnect thermistor electrical plug. Replace in the
reverse order.
A
B
Fig. 24
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