19
SECTION 6 SERVICING INSTRUCTIONS
6.1 GENERAL
To ensure the continued safe and efficient 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 certain 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 appliance 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
specification. 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 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 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.
Ensure some water absorbent cloths are available to catch
any residual water that may drip from the appliance or
removed component. Under take a complete
commissioning 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.
6.4.1 AIR BOX FRONT COVER REMOVAL (fig. 18)
Locate the two clips and remove air box front cover. If it’s
necessary to remove the air box side cover, locate and
remove the 4 securing screws
.
6.5 AUTOMATIC AIR RELEASE VALVE (fig. 19)
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 and remove the air chamber front cover. 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 and remove the air chamber front cover. Unclip
the return thermistor from the return inlet pipe. Disconnect
thermistor electrical plug. Replace in the reverse order.
6.8 PRINTED CIRCUIT BOARD (fig. 20)
Carry out component removal procedure as described in
6.4. Pull the control fascia forward and lower it. Locate
and remove the screws
(A)
which secure the PCB cover,
push the clips
(B)
and remove cover, after carefully taking
clips
Fig. 18
A
B
Fig. 19
