Inspection And Maintenance 8; Initial Inspection; Safety Instructions; Maintenance - Vaillant ecoTEC plus Instructions For Installation And Servicing

8 Inspection and maintenance
8.1

Initial inspection

To ensure the continued safe and efficient operation of
the boiler it is recommended that it is checked and serv-
iced as necessary at regular intervals.
The frequency of servicing will depend upon the particu-
lar installation conditions and usage, but in general once
per year should be adequate.
Danger!
d
It is law that all servicing work is carried out
by a competent person (CORGI registered). In-
spections/Maintenance work not carried out by
a competent person can result in damage to
property and personal injury.
Only genuine Vaillant spare parts may be used for in-
spections, maintenance and repair work to ensure the
long term working order of all functions of your Vaillant
appliance. Any spare parts which might be required are
contained in the current spare parts catalogues. Infor-
mation can be obtained from Vaillant Customer Service
Centres.
8.1.1

Safety instructions

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.
• When removing any water carrying components ensure
that water is kept away from all electrical components.
• Always use new seals and O rings when parts are
replaced.
• Always test for gas soundness and always carry out
functional checks after any service work and after
replacing any gas carrying component.
• Always check earth continuity, polarity and resistance
to earth with a multimeter after any service work and
after replacing any electrical component.
e Danger!
Electrocution by touching live parts can be
fatal! The supply terminals in the appliance are
permanently live unless the appliance is isolat-
ed from the electrical supply either by remov-
ing the fuse from a fused spur or pulling the
plug out if connected to a socket outlet. Pro-
tect the electronics box from spray water. Be-
fore working on the appliance, turn off the
power supply and secure against restart!
Instructions for installation and servicing ecoTEC plus / 0020020828_05

Inspection and maintenance 8

Always perform the following steps after completing
any inspection tasks:
• Sealed system only. If necessary, refill the appliance
with cold water up to a pressure of approx. 1.5 bar and
bleed air from the entire heating system.
• Open the service valve of the gas supply pipe.
• Turn on the power supply and the main switch.
• Check the appliance for gas and water leaks.
• Fill and bleed air from the heating system again, if
necessary.
Note!
h
If it is necessary to keep the main switch on
for certain inspection and maintenance, this is
indicated in the description of the maintenance
task.
h Note!
The boiler is fitted with a combustion analysis
test point. A suitable combustion analyser can
be connected to this point to establish the com-
bustion performance of the boiler. Checking/
adjustment of this value is required in the
following instances; replacement of gas valve,
conversion to or from Natural Gas/LPG as part
of the service schedule or if incorrect combus-
tion is suspected (see section 9).
8.1.2

Maintenance

Before commencing any servicing or maintenance work,
carry out an initial inspection of the system as follows:
• Inspect the flue, pipe work 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.
8.1.3

Functional check of boiler operation

• Carry out a functional check of the boiler operation
as previously detailed.
• Remove the appliance casing as detailed and operate
the boiler.
• 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.
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