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Commissioning, inspection, maintenance
Checking the oil pressure and vacuum , adjusting...
Checking the settings of the air damper servomotor
The air damper servomotor is factory-set and must only be adjusted in exceptional cases. Exceptions are the
replacement of the air damper servomotor, soot build-up and the altitude above sea level of the installation
site. The CO
value must only be adjusted by regulating the oil pressure.
2
Z
ST2
BV
SL
ST1
Fig. 5
The burner is equipped with an air damper servomotor
with adjustable switch cams for the positioning of the
air damper and the solenoid valve control.
During a controlled shutdown, the burner air damper
moves into the "closed" position. This reduces the
cool-down losses.
10
90
30
0
90
60
30
0
90
60
30
0
90
60
30
0
90
60
30
0
(cont.)
08. Test to check the actual emission values after
adjusting the oil pressure.
09. Switch system OFF at mains isolator and safe-
guard against unauthorised reconnection.
10. Undo the pressure and vacuum gauges.
11. Check the plug seal rings for damage and replace
if necessary.
Insert plugs "P"
and "V"
A
12. Start the burner and check the plugs for leaks.
The switch cams are located under the cover of the air
damper servomotor. A scale ring is located adjacent to
each switch cam, where the selected angle of the air
damper can be checked.
The switch cams have the following functions:
Z
Air damper closed (0
Never alter the setting of Z.
SL
Ignition air setting
ST1 Air damper setting stage 1
ST2 Air damper setting stage 2
BV
Solenoid valve stage 2
The switch cams for ignition air stage 1 and 2 are set
at the factory. For factory settings, see chapter "Stand-
ard values for burner settings".
The switch cams are adjusted via slotted screws
the cams. When doing this observe the following:
■
The ignition air setting cannot be turned beyond the
setting of stage 1 (turning further is blocked by
cams).
After adjusting the ignition air setting to match stage
■
1, always adjust the ignition air setting approx. 1-5
below stage 1.
.
B
)
º
A
in
°
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