Vaillant ecoTEC plus SERIES Operating Instructions Manual - page 12
12
Operating instructions ecoTEC plus 0020124810_FT1b
4.3.3
Checking the fill level of the heating system
b
Caution!
Low fill pressure can cause damage to the
unit!
Operating the heating system with low fill
pressure can cause damage to the boiler and
the heating system. The boiler switches off
automatically when the fill pressure falls
below 0.5 bar.
> Fill up the heating system as soon as the
fill pressure falls below 0.8 bar.
To avoid operating the system with insufficient water
and to prevent possible damage associated with this,
your boiler is fitted with a pressure sensor. This signals
the low pressure level if the level falls below 0.8 bar by
the water pressure value in the display flashing.
> Fill up the heating system as soon as the pressure
value in the display starts to flash.
i
If the fill pressure of the heating system falls
below 0.5 bar, then the boiler switches off and
the error message F.22 appears in the display.
The heating system must be topped up with
water before the boiler can be put into
operation again.
The ecoTEC plus boiler has a digital pressure display.
You can see the fill pressure in the right bar graph
display or display the exact value using the selection
buttons to the right of the display.
> Press the on/off switch (¬ Fig. 4.1, 8) to switch on the
boiler (¬ section 4.3.2).
> Press the right "Operating mode" selection button
(heating/hot water).
The value of the flow temperature appears in the display.
The right selection button is now assigned the "Next"
function.
> Press the right selection button ("Next") until you
reach the water pressure display.
The value of the fill pressure appears in the display.
To exit the water pressure display and return to the
basic display:
> Press the "Next" or "Back" selection button until you
have reached the desired level or the basic display.
If you do not press any buttons for more than
15 minutes, the display returns to the basic display.
If the heating system extends over several storeys,
the system may require a higher filling pressure.
> Ask your heating engineer for details.
The filling pressure must lie between 1.0 and 2.0 bar
when the heating system is cold in order for the heating
system to operate properly. If the fill pressure falls below
this range, then you must top it up with water before
switching it on (¬ section 4.3.4).
> Check the fill pressure of the heating system during
start-up.
4.3.4
Filling the heating system
b
Caution!
Tap water that is extremely calciferous or
corrosive or contaminated by chemicals
can cause damage to the boiler!
Unsuitable tap water damages the seals and
diaphragms, blocks components in the boiler
and heating system through which the water
flows and causes noise.
> Only fill the heating system with suitable
tap water.
> In case of doubt, consult your heating
engineer.
The filling pressure must be between 1.0 and 2.0 bar
when the system is cold in order for the heating system
to operate properly (¬ see section 4.3.3).
> If the fill pressure is lower, then top it up with water.
If the heating system extends over several storeys, the
system may require a higher filling pressure.
> Ask your approved heating engineer about this.
To fill up and to refill the heating system, you can
normally use tap water. In exceptional cases, however,
the water quality may not be suitable for filling the
heating system because the water is highly corrosive or
calciferous.
> If this is the case, contact your approved heating
engineer.
The heating system is filled via a filling cock provided by
the installer.
> Ask your heating engineer where the filling cock is
located.
> Ask your heating engineer to explain how to fill the
heating system.
4 Operation