Settings for marathon
®
burner with pneumatic linkage
dreizler A 3001 E - 18.12.2015 | A 2003 - 1.10 | EN - 11.11.2010
25
9
Settings for marathon
®
burner with pneumatic linkage
9.1
Description and functionality of the pneumatic linkage
dreizler
®
burners with pneumatic components allocate the correct gas pressure to the air pressure at the
mixing manifold. Burner settings are carried out with only to correcting variables (
N
zero point shift and
V
gas/air ratio) on the integrated pressure ratio controller.
The burners of the model series 121 to 5001 are equipped with two air dampers:
•
One motorised air damper for load control (pressure side).
•
One manual damper (suction side) for pre-throttling of the fan.
NOTICE:
The manual damper is no longer included from sizes 5001.4 onwards. In its stead, a suction-side fixed suc-
tion throttle is planned for smaller burner loads of <70%.
NOTICE:
Check the gas impulse line for leaks prior to beginning the set-up process for the burner.
9.2
Presetting of the motorised air damper (pressure side) for MAX load
Run the air damper actuator up to approx. 90° full load.
The air damper is positioned parallel to the air flow.
Use the setting screw V at the ratio controller to set the transmission ratio P
gas
to P
air
at full load.
The O
2
value should be at approx. 3%.
NOTICE:
V larger = more gas = less O
2
V smaller = less gas = more O
2
Check your setting by way of the viewing window of the controller.
Examples for settings and displays for correcting values
V
and
N
for gas valves:
Kromschröder CG 15 - 30
Fig. 9-1 CG... Settings and display for V and N
