21
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.
To ensure correct and safe operation of the appli-
ance, it is essential that any worn or failed compo-
nent 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 serv-
icing 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 sys-
tems 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 no-
ticeable deterioration 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 7.4).
●
Check and adjust – if necessary – the system
design pressure (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 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 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 4.7.1 and drain the water
content from the appliance via the drain valve.
Ensure some water absorbent cloths are available
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.
AL-
WAYS TEST FOR GAS SOUNDNESS IF ANY
GAS CARRYING COMPONENTS HAVE BEEN
REMOVED OR DISTURBED.
6.4.1
AIR BOX FRONT COVER REMOVAL (fig. 24)
Locate the two clips and remove air box front
cover. If necessary to remove the air box side
cover, locate and remove the 4 screws
.
6.5
PUMP ASSEMBLY (fig. 25)
Carry out component removal procedure as de-
scribed in 6.4.
Locate and remove the 2 securing screws
(A)
at
the rear of the pump assembly. Disconnect the
flow pipe
(B)
from the combustion chamber con-
nection, slacken the pipe at the hydraulic assem-
bly and swing/rotate clear of the pump assembly.
Disconnect and remove the pump outlet pipe
(C)
from the pump assembly/combustion chamber
connection. Remove the expansion pipe locking
pin from the top of the pump assembly and
withdraw the flexible pipe
(D)
. Disconnect the
electrical wiring from the pump’s electrical con-
nection point
(E)
. 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. 24
A
B
C
E
F
G
H
I
D
clips
Fig. 25
