Buderus 500-24C Installation And Maintenance Instructions Manual page 37

2.1.2 DBA adjustments
The boiler is equipped with a boiler control unit (DBA).
This is the internal control of the boiler. The DBA is
located behind the access panel.
The DBA allows you to operate the boiler and to make
adjustments in its settings.
DBA overview:
1. Mains switch ( fig. 49)
Use this switch to turn the boiler on or off.
2. Reset button (
When a blinking code is in the display, it is possible to try
and restart the boiler by pressing this button.
NOTE
It is not possible to reset the boiler when
there is no fault code blinking in the display.
3. Service button (
The boiler will operate on partial load when the Service
button is pressed once. An open-ended spanner
appears in the top left hand corner of the display
( fig. 50).
Press the button if you want to make sure that the
boiler is actually operating at partial load ('Lo' appears in
the display, fig. 51).
Buderus 500-24C/28C - Subject to modifications resulting from technical improvements
fig. 49)
fig. 49)
3 4
1
2
DBA
Fig. 49
1 mains switch
2 "reset" button
3 "service" button
4 display
5 "menu" button
6 adjusting arrow up
7 adjusting arrow down
Fig. 50 DBA with open-ended spanner
Fig. 51 DBA display Lo
2
Commissioning
5 6
7
7215 3100-49.1TD
7215 3100-50.1TD
7215 3100-51.1TD
37