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4 Operation
3.8 Operating levels
The product has two operating levels:
– The operator level shows the most im-
portant information and offers set-up
options which do not require any special
prior knowledge.
– Specialised knowledge is required in or-
der to use the installer level (access for
competent persons). This is therefore
protected by an access code.
Operator level – overview (→ Page 15)
4 Operation
4.1 Starting up the product
4.1.1 Opening the isolator devices
Conditions: The competent person who installed
the unit will explain where the isolator devices are
and how to handle them.
▶
Ensure that the gas isolator cock is fully
open.
▶
Ensure that the stop cocks in the heat-
ing installation's flow and return are
open.
▶
Ensure that the cold water stop cock is
open.
4.1.2 Starting up the product
2
▶
Press the (2) button.
◁
When the unit is switched on, the
"Basic display" is shown in the
display (1).
10
4.2 Basic display
The filling pressure in the heating installa-
tion and the operating mode are shown in
the display's basic display.
To return to the basic display:
– Wait more than five seconds without
pressing any buttons.
If a fault message is present, 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 0.1 MPa and 0.15 MPa
(1.0 bar and 1.5 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-
1
tion.
Note
If the heating flow temperature
is shown in the display, press
and hold the
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. (→ Page 11)
Operating instructions HOME 0020224356_00
and
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