4 Operation
10 Operating instructions ENERGY ..r 0020177749_01
4.1.2 Switching on the product
▶ Switch on the product via the main
switch installed on-site.
4.2 Basic display
The operating mode is displayed on the
basic display.
You can switch back to the basic display
by:
– Not pressing any button for longer than
5 seconds.
As soon as there is a fault message, the
basic display switches to the fault code.
4.3 Checking the heating system
pressure
1. Once a month, check that the pressure
in the central heating system, which
is displayed on the user interface, is
between 0.05 MPa and 0.27 MPa
(0.5 bar and 2.7 bar).
◁ If the filling pressure is correct, no
action needs to be taken.
▽ If the filling pressure is too low, add
more water to the heating installa-
tion.
Note
If the heating flow temperature
is shown in the display, press
and hold the and buttons
at the same time for longer than
five seconds, or temporarily
deactivate heating mode in
order to display the pressure.
2. Fill the heating installation.
4.4 Filling the heating installation
Caution.
Risk of material damage due
to heating water that is ex-
tremely calciferous or corros-
ive or contaminated by chem-
icals.
Unsuitable tap water damages
the seals and diaphragms,
blocks components in the
product and heating installation
through which the water flows
and causes noise.
▶ Only fill the heating install-
ation with suitable heating
water.
Note
The competent person is respons-
ible for filling the heating installa-
tion the first time, any subsequent
top-ups and the water quality.
The operator alone is respons-
ible for topping up the water in the
heating installation.
1. Open all radiator valves (thermostatic
radiator valves) of the heating installa-
tion.
2. Slowly open the filling cock, as shown
to you by the competent person.
3. Fill with water until the required filling
pressure is reached.
4. Check the filling pressure in the
display.
5. Close the filling cock after filling.
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