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2
Commissioning
2.1.2
DBA adjustments
The boiler is equipped with a 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 adjust-
ments in its settings.
DBA overview:
1. Mains switch (see fig. 42)
Use this switch to turn the boiler on or off.
B
2. Reset button "
" (see fig. 42)
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.
A
3. Service Button "
" (see fig. 42)
The boiler will operate on partial load when the Service button
"A" is pressed once. An open-end spanner "F" appears in the
top left hand corner of the display (fig. 43).
Press the C button if you want to make sure that the boiler is
actually operating at partial load ('Lo' appears in the display,
fig. 44).
Subject to modifications resulting from technical improvements!
32
Installation and maintenance instructions for Buderus 500 - 24/C and 500 - 28/C • 02/2005
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fig. 42 DBA
item 1:
mains switch
item 2:
"reset" button
item 3:
"service" button
item 4:
display
item 5:
"menu" button
item 6:
adjusting arrow up
item 7:
adjusting arrow down
fig. 43 DBA with open-end spanner
fig. 44 DBA display Lo
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
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