9 Servicing
9.1 Initial Inspection
To ensure the continued safe and efficient operation of
the boiler it is recommended that it is checked and
serviced as necessary at regular intervals. The
frequency of servicing will depend upon the particular
installation conditions and usage, but in general once
per year should be adequate. It is the law that all
servicing work is carried out by a competent person
(Corgi registered).
Important: Before starting any maintenance work:
• Isolate the mains electricity supply by disconnecting
the plug at the socket outlet (if there is only an
isolating switch remove the fuse from the switch).
• Turn OFF the gas supply at the gas service valve fitted
to the boiler.
• Always test for gas soundness and always carry out
functional checks after any service work and after
exchanging any gas carrying component.
• Always check earth continuity, polarity and resistance
to earth with a multimeter after any service work and
after exchanging any electrical component.
Before commencing any servicing or maintenance work,
carry out an initial inspection of the system as follows:
• Inspect the flue, pipework and electrical connections
for indications of damage or deterioration.
• Inspect the air supply and ventilation arrangements of
the installation.
• Check the heating and water system, in particular the
condition of radiator valves, evidence of leakage from
the heating system and dripping hot water taps.
9.2 Functional check of boiler operation
• Carry out a functional check of the boiler operation as
prevoiusly detailed.
• Remove the appliance casing as detailed on page 15
and operate the boiler by fully opening a hot water
tap. Inspect the burner operation through the viewing
window. Check that the flames are evenly covering the
surface of the burner. Inspect for signs of excessive
flame lift or sooting.
8 Functional checks (Commissioning Part III) Servicing 9
Instructions for installation and servicing aquaPLUS VUI 362-7
34
8.7 Handing over to the user
Set the maximum radiator temperature control to the
desired setting.
Set the maximum hot water temperature control to the
desired setting.
Instruct the user in the safe and efficient operation of
the boiler, in particular the function of
• The boiler on/off control
• The maximum radiator temperature control
• The maximum hot water temperature control
• The pressure gauge
Show the user how to operate any external controls.
Explain to the user the importance of having the boiler
regularly serviced by a competent servicing company.
To ensure regular servicing, it is strongly recommended
that arrangements are made for a Maintenance
Agreement. Please contact Vaillant Service Solutions
(0870 6060 777) for further details.
Ensure the boiler log book is fully completed and leave
with the end user. Failure to install and commission this
appliance to the manufacturers instructions may
invaludate the warranty (Note: This does not affect your
statutory rights).
Leave the user instructions, the boiler log book and the
installation and servicing instructions with the user.
8.8 Anti legionella protection
Advise the user that if the
power store
is turned off or
if the domestic hot water thermostat is at a low setting
the boiler will operate daily to charge the store and
protect against legionella (the
power store
is turned off
during production).
Note:
Leave the Benchmark Log Book with the end user.
Note:
The boiler is fitted with a combustion analysis
test point on the combustion chamber cover. A suitable
combustion analyser can be connected to this point to
establish the combustion performance of the boiler.
Note:
Very hot water will be discharged during tapping
after this operation.
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