20
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 ap-
pliance, 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 Vokèra 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 Vokèra spare parts could
invalidate your warranty and may pose a potential safety haz-
ard. 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 Vokèra engineer, an approved
service agent, British Gas, GAS SAFE registered personnel
or other suitably qualified personnel. The following instruc-
tions 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 dete-
rioration especially the flue system and the electrical apparatus.
•
Check and adjust – if necessary – all burner pressure settings
(see 7.4).
•
Check and adjust – if necessary – the system design pres-
sure (see 5.10).
•
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 recti-
fied without delay.
•
Check that the main heat exchanger are clean and free from
any debris or obstruction.
•
Check and clean – if necessary – the condense trap to ensure
correct operation.
The flame side of the burner is made of state-of-the-art material.
Being fragile:
- be particularly careful when handling, mounting or disman-
tling the burner and adjacent components (e.g. electrodes,
insulation panelling etc.)
- avoid direct contact with any cleaning appliance (e.g. brushes,
aspira tors, blowers, etc.).
This component does not need any maintenance, please do
not remove it from its housing, save where the O-ring may
have to be replaced.
The manufacturer declines all responsibility in cases of dama-
ges due to failing to observe the above.
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. 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 4.7.1 and drain the water content from the appliance via
the drain valve. Ensure some water absorbent cloths are avail-
able to catch any residual water that may drip from the appliance
or removed component. Undertake a complete commissioning
check as detailed in section 5, after replacing any component.
ALWAYS TEST FOR GAS TIGHTNESS IF ANY GAS CARRY-
ING COMPONENTS HAVE BEEN
REMOVED OR DISTURBED.
SECTION 6 - SERVICING INSTRUCTIONS
6.4.1 AIR BOX FRONT COVER REMOVAL (fig. 28)
Locate the 4 screws and remove air box front cover.
Fig. 28
6.5 PUMP ASSEMBLY (fig. 29)
Carry out component removal procedure as described in 6.4.
Disconnect and remove the pump outlet pipe (
A
) from the pump
assembly/combustion chamber connection.
Remove the expansion pipe locking pin (
B
) from the top of the
pump assembly and withdraw the flexible pipe. Locate and
remove the pressure gauge securing pin (
C
) and disconnect
the pressure gauge from the pump assembly. Disconnect the
electrical wiring from the pump’s electrical connection point (
D
).
Locate and remove the 2 securing screws (
E
) at the rear of the
pump assembly. Remove locking pin (
F
) from pump base and
lift pump assembly clear of the hydraulic manifold. The pump
assembly can now be removed from the appliance. Replace
carefully in the reverse order.
Fig. 29
A
B
C
D
E
F
I
J
6.6 SAFETY VALVE (fig. 32)
Carry out component removal procedure as described in 6.4.
Disconnect the outlet pipe from the safety valve (
G
), remove
safety valve locking pin (
H
) from the hydraulic manifold. Replace
in the reverse order.
6.7 DHW THERMISTOR (fig. 32)
Carry out component removal procedure as described in 6.4.
Locate and remove the thermistor locking pin (
I2
). Gently ease
the thermistor assembly (
J2
) from the hydraulic manifold. Re-
place in the reverse order.
Fig. 32
I2
J2
G
H
