Vaillant ecoTEC plus SERIES Operating Instructions Manual - page 14
Operation
14
Operating instructions ecoTEC plus 0020116701_00
5
If the boiler is switched on, the current heating flow tempera-
ture and other information will appear in the display (2)
(¬ Fig. 4.5).
To set your boiler to suit your needs, read ¬ Section 5.2 to
Section 5.4 which describe the setting options for hot
water production and the heating mode.
5.1.3
Checking the fill level of the heating system
b
Caution!
Low filling pressure can cause damage to
the unit.
Operating the heating system with low fill-
ing pressure can cause damage to the
boiler and the heating system. The boiler
switches off automatically when the filling
pressure falls too low.
> Fill up the heating system as soon as the
filling pressure falls below 0.08 MPa
(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 and a digital pressure display.
To ensure that the heating system operates smoothly, the
filling pressure when the heating system is cold must be
between 0.1 MPa and 0.2 MPa (1.0 bar and 2.0 bar) or lie
between the two dotted lines in the bar graph display.
If the heating system extends over several storeys, a higher
filling pressure may be required for the heating system.
> Ask your approved competent person for details about
this.
If the pressure falls below 0.08 MPa (0.8 bar), the right-
hand bar graph display and the current pressure flash in
the display.
> Fill up the heating system (¬ Section 5.1.4).
i
Switch off the boiler if the filling pressure in the
heating system falls below 0.05 MPa (0.5 bar).
The display alternates between the fault mes-
sage F.22 and the current filling pressure.
The heating system must be topped up with water before
the boiler can be put into operation again. As soon as the
system has been topped up with sufficient water, the mes-
sage disappears automatically after approx. 20 seconds. If
the pressure drops frequently the reason for the loss of hot
water must be identified and eliminated
> Contact your heating engineer.
You can see the filling pressure in the right-hand bar graph
display or display the exact value using the selection but-
tons to the right of the display.
1,0
Water pressure
Back
0,8
3,0
1
2
3
5.4 Digital display of filling pressure
> Press the right-hand selection button
twice.
The current filling pressure (1) and the minimum (3) or
maximum water pressure (2) that is to be set appear in the
display.
5.1.4
Filling the heating system
b
Caution!
Risk of damage caused by tap water that
is extremely calciferous or corrosive or
contaminated by chemicals.
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 approved
competent person regarding this.
To fill up and to refill the heating system, you can normally
use tap water. In exceptional cases, however, the water qual-
ity 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 engi-
neer.
The heating system is filled via a filling cock provided by
the installer.
> Ask your approved competent person where the filling
cock is located.
> Ask your approved competent person to explain how to
fill the heating system.
You can show the exact filling pressure in the display
(¬Section 5.1.3).