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6.1 GENERAL
-
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
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
competent person such as a Vokèra engineer, an approved
service agent, British Gas, GAS SAFE registered personnel
-
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
as described in section 7.
apparatus.
(see 7.4).
-
sure (see 5.10).
pressure to the required value, drain off some water from the
5.11 REGULATING THE CENTRAL HEATING
SYSTEM
Fully open all radiator and circuit valves and run the appliance
for both heating and hot water until heated water is circulating.
If conditions are warm remove any thermostatic heads. Adjust
radiator return valves and any branch circuit return valves
until the individual return temperatures are correct and are
approximately equal.
5.11.1 REGULATING THE DHW FLOW-RATE
The restrictor eliminates the need to manually adjust the DHW
from Vokèra spare parts.
5.11.2 FLOW-RATE RESTRICTOR
Vision 25C:
Vision 30C:
5.12 FINAL CHECKS
• ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS
VALVE ARE TIGHT AND CHECKED FOR TIGHTNESS.
• ENSURE THE APPLIANCE FLUE SYSTEM IS FITTED
CORRECTLY AND IS PROPERLY SECURED.
• ENSURE ALL PIPE WORK IS RE-CHECKED FOR TIGHT-
NESS.
• RE-FIT APPLIANCE CASING.
• COMPLETE BENCHMARK CHECKLIST.
FOR UK ONLY
Complete details of the boiler, controls, installation and commis-
sioning in the Benchmark checklist at the back of this book. It is
important that the Benchmark checklist is correctly completed
and handed to the user. Failure to install and commission the
appliance to the manufacturers instructions may invalidate the
warranty.
5.13 INSTRUCTING THE USER
Hand over all documentation supplied with this appliance –
including these instructions – and explain the importance of
keeping them in a safe place.
Explain to the user how to isolate the appliance from the gas,
water and electricity supplies and the locations of all drain
points. Show the user how to operate the appliance and any
associated controls correctly.
up the system pressure correctly and show the location of all
manual air release points.
Explain to the user how to turn off the appliance for both long
and short periods and advise on the necessary precautions to
prevent frost damage.
the appliance must be serviced annually by a competent person.
IMPORTANT
To validate the appliance warranty, it’s necessary to register
the appliance details with us. The warranty can be registered
in several ways:
• by completing the warranty registration card and posting to
us using the envelope supplied
• online at: vokera.co.uk
• for UK residents by calling: 0870 607 0281
• for ROI residents by calling: 056 6655057.
SECTION 6 - SERVICING INSTRUCTIONS
-
any debris or obstruction.
correct operation.
Being fragile:
- be particularly careful when handling, mounting or dismantling
the burner and adjacent components (e.g. electrodes, insula-
tion panelling etc.)
- avoid direct contact with any cleaning appliance (e.g. brushes,
aspirators, blowers, etc.).
This component does not need any maintenance, please do
not remove it from its housing, except where the O-ring may
have to be replaced.
The manufacturer declines all responsibility in cases of damages
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.
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
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