Settings for marathon
®
burners with mechanical linkage
dreizler A 3001 E - 18.12.2015 | A 2070 - 1.12 | EN - 09.11.2012
37
12.3 Basic settings for gas and air damper
NOTICE:
In position MAX, bos air damper and gas damper are fully opened.
The air and gas damper must be aligned with air and gas flow. A deviation of +/- 10° will have no effect on
measured flows. In position MAX, cam 1 on the servomotor limits the servomotor's operation.
Fig. 12-4 Gas damper adjustment rod
1
Leverage length
2
Air damper axis
3
Adjustment rod
4
Gas damper axis
Settings schema for basic settings of the air and gas damper:
1) The leverage length of air and gas damper levers is min. 16mm and max. 48 mm. A setting towards the
max. range at about 35mm is recommended.
2) The adjustment rod is set in its length in such a way that the two adjustment angles
1 and
2 swivel
symmetrically around the perpendicular of the imaginary line A0-B0.
This will result in an equal angle setting of both the air and gas damper with mostly synchronous positions
for the two damper cross-sections.
Corrections to the linkage settings to ensure an allowable CO
2
measuring curve in the end and intermedi-
ate positions are then carried out on the basis of the actual linkage settings and gas fow settings at MIN
and MAX.
Fig. 12-2 Gas damper adjustment angle vertical
Fig. 12-3 Gas damper adjustment angle horizontal
