6
Operating instructions ecoTEC plus 0020134822_01
a
Safety
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2
Caution.
Frost protection and monitoring devices are only active
while the boiler is connected up to the power supply. The
boiler must be connected to the power supply. The boiler
must be switched on. You can see from symbols and/or text
in the display that the boiler is switched on.
Caution.
>
Under no circumstances should you add frost protection
agents (or other additives, e.g. jointing compounds, cor-
rosion protection agents, etc.) to the heating water with-
out first consulting your qualified competent person.
Otherwise, it could result in damage to seals and dia-
phragms as well as noise during heating mode. Vaillant
assumes no liability for this or any consequential dam-
age.
Another way to protect the heating installation and the
boiler from frost is to drain them. In doing so, you must
ensure that the heating installation and boiler are com-
pletely drained.
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Contact your approved heating specialist company for
advice on this.
Maintaining operation with an emergency power
generator in the event of a power cut
Your recognised heating specialist company connected your
boiler to the power mains during installation.
If the electricity supply is cut, it is possible that parts of the
heating installation may become damaged by frost.
If you want to maintain the operation of the boiler during a
power cut using an emergency power generator, take note
of the following:
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Make sure that the technical values of this generator
(frequency, voltage, earthing) match those of the power
mains.
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Contact your approved heating specialist company for
advice on this.
Changes to the boiler's environment
You must not make any changes to the boiler's environ-
ment:
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Never shut down the safety devices.
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Do not tamper with any of the safety devices.
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Do not make any changes:
– to the boiler
– to the gas, air, water and electricity supply lines,
– to the entire flue gas installation,
– to the entire condensate drain system,
– to the expansion relief valve or the drain line or
– to constructional conditions that could affect the
operational reliability of the boiler.
Cabinet-type cladding
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If you require cabinet-type cladding for your boiler, con-
sult an approved heating specialist company. Do not,
under any circumstances, enclose your boiler yourself.
Enclosing the boiler in cabinet-type cladding requires com-
pliance with the special design instructions.
What to do if there are leaks in the hot water pipes
Take note of the following:
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In the event of leaks, immediately close the cold water
stop valve in the domestic hot water pipework between
the boiler and the draw-off points.
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Have the leak repaired by an approved heating specialist
company of your choice.
With Vaillant ecoTEC plus boilers, the cold water stop valve
is not included in the scope of delivery of your boiler.
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Ask your competent person where he fitted the cold
water stop valve.
Preventing damage caused by low system pressure
in the heating installation
To prevent the heating installation being used when the
amount of water is too low and to therefore prevent any
subsequent damage that may be caused by this, note the
following:
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Check the filling pressure of the heating installation at
regular intervals.
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Always observe the information on filling pressure pro-
vided in
¬ section 4.6.3
.
Requirements for the installation site
It is not necessary to keep a clearance between the boiler
and combustible materials or components because, at the
nominal heat output of your boiler, the temperature on the
surface of the housing is always lower than the maximum
permissible temperature of 85 °C.
