Setting Damper Motor 2-Stage - Bentone BG 550-2 Installation And Maintenance Instruction

4.11 Setting Damper motor 2-stage

Air adjustment
The damper motor rotates the air damper between
three preset positions: completely closed, low load and
high load. These positions are controlled in the motor
by colored cam discs, the black cam disc controls the
switching on/off of the solenoid valve. Adjust the amount
of air by changing the position of the cam discs.
Blue cam disc is the limit position for closed air dampers
and does not normally need to be changed.
Low load
• Set control switch for load position to position II
(high load).
• Turn orange cam disc to 0° to reduce airfl ow and
to 90° to increase airfl ow.
• Return the control switch to position I (low load)
and check the combustion values.
Solenoid valve High load (black)
High load (red)
Low load (orange)
Closed air damper (blue)
High load
• Set control switch for load position to position I
(low load).
• Turn red cam disc to 0° to reduce airfl ow and to
90° to increase airfl ow.
• Place black cam disc in a position between red
and orange cam discs and adjust to obtain a good
load change.
• Return the control switch to position II (high load)
and check the combustion values.
Release
By pressing the button, the motor is disengaged and the
air damper can be turned. The function is used when
servicing air dampers.
Release button
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