Vaillant ecoTEC pro, Operating Instructions Manual

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Operating instructions ecoTEC pro 0020129673_00 

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Safety

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Caution!

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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 skilled tradesman. Oth-
erwise, this could result in damage to seals and dia-
phragms as well as noises during heating mode. Vaillant 
assumes no liability for this or any consequential dam-
age.

Another way to protect the heating system and the boiler 
from frost is to drain them. In doing so, you must ensure 
that the heating system and boiler are completely 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 power 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 surroundings of the boiler

You must not make any changes to the surroundings of the 
boiler:

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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 system,

– to the entire condensate drain system,

– to the expansion relief valve or the drain line and

– constructional conditions that could affect the opera-

tional reliability of the boiler

Cupboard Installation

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If you require your boiler to be fitted into a kitchen type 
cupboard then please consult your approved heating 
specialist company. Under no circumstances must you 
enclose your boiler yourself.

Enclosing the appliance in a cupboard requires compliance 
with the special design instructions. This is to ensure all 
necessary access is available for all necessary future 
 service requirements.

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 your approved heating special-
ist company.

With Vaillant ecoTEC pro boilers, the cold water stop valve 
is not included in the scope of delivery of your boiler.

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Ask your approved heating specialist company where 
they 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 5.1.3

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Requirements for the installation site

It is not necessary to keep a clearance between the boiler 
and combustible materials or components since, at the 
nominal heat output of your boiler, the temperature on the 
surface of the casing is always lower than the maximum 
permissible temperature of 85 °C.