Operation 4
0020177749_01 ENERGY ..r Operating instructions 9
3.5.1 Description of the display
1 Operating in-
formation
2 Active operating
mode, selecting
and confirming
the operating
mode
3 Additional in-
formation
Symbol Meaning
Burner operating correctly
– Burner on
DHW mode
– Permanently on: Hot wa-
ter activated
– Flashing: Burner on in
draw-off mode
Display flashing:
– Switching on the product
– Fault
Setting confirmed
/
Fault in the product
– Appears instead of the
basic display.
OFF – Appears when switching
the product to standby
mode.
3.5.2 Description of button
functions
Button Meaning
– Selecting the operating mode
– Confirm the operating mode
– Confirm setting
– Increase the display contrast
Button Meaning
or
– Setting the hot water temperat-
ure
– Setting the heating flow tem-
perature
– Increase or decrease the selec-
ted setting
– Increase the display contrast
– Activate the product: On/off
(standby)
– Reset the product
Adjustable values flash on the display.
You must confirm any change to a value.
Only then is the new setting saved.
If you do not press any buttons for five
seconds, the displays switches back to
the basic display.
If you do not press any buttons for one
minute, the display contrast decreases.
3.6 Operating levels
The product has two operating levels:
The end user level contains information
and setting options that you require as the
end user
The installer level is reserved for the com-
petent person. It is protected by a code.
Only competent persons may change any
settings in the installer level.
Adjustable values – overview (→ Page 14)
4 Operation
4.1 Starting up the product
4.1.1 Opening the isolator devices
1. Ask the competent person who in-
stalled the product to explain to you
where these isolator devices are loc-
ated and how to handle them.
2. Open the gas isolator cock fully.
3. Check that the heating installation flow
and return service valves are open, if
such service valves are installed.
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