4 Operation
10
Operating instructions HOME 0020224354_00
3.8 Timer
Applicability:
Timer
You can control the heating mode using
the timer.
Position for
the selection
switch
Functionality
0
Heating mode permanently
switched off
Heating mode intervals in
accordance with the timer
I
Heating mode permanently
switched on
▶
Set the timer. (
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Page 12)
3.9 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 (
Applicability:
Combination unit) (
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Page 16)
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
1
2
▶
Press the
(2)
button.
◁
When the unit is switched on, the
"Basic display" is shown in the
display
(1)
.
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-
tion.
