Settings for marathon
®
burners with mechanical linkage
dreizler A 3001 E - 18.12.2015 | A 2070 - 1.12 | EN - 09.11.2012
42
Despite the decreasing CO
2
content, burner efficiency will increase up to 98% or more due to lower waste
gas temperatures at partial load.
If this setting for the CO
2
value cannot be achieved in the intermediate positions 'Partial load', then the fol-
lowing errors may have occurred:
a) Linear error (correct in MIN position only)
Fig. 12-6 Gas damper linear error
1
CO
2
before
2
CO
2
after
Excess air in the entire range of the control curve (CO
2
values too low)
Reason: Gas damper closes faster than air damper (from MAX to MIN).
Remedy: Increase leverage of damper lever (radius).
Result: Gas slower, air constant.
Fig. 12-7 Gas damper linear error
1
CO before
2
CO after
3
CO
2
before
4
CO
2
after
Lack of air in the entire range of the control curve (CO values too high)
Reason: Gas damper closes slower than air damper (from MAX to MIN).
Remedy: Shorten the leverage of the gas damper lever.
Result: Gas faster, air constant.
