39
Bentone BG550/650
General
10. Damper motor modulating
10.1 Air adjustment
• Adjust the orange cam for min. load (about 5-10
on scale)
• Adjust the red cam for max. load (90° )
• The blue cam is factory set for closed position
during standstill
• The black cam has no function at modulating
operation
• Before the burner starts vent the lines to make sure
that there is gas vailable at the multibloc. Use an
allen key size 2,5 mm for adjusting N and V
• Connect a pressure gauge for measuring P
Br
,
(advisable to ind out if the valves are open).
• Set the switch in position MAN.
• Set the gas pressure switch min. and air pressure
switch on min. adjustment. Set the gas pressure
switch max, if any, on max. adjustment.
• Start the burner, observe the pressure gauge, if
no lame is established and the pressure gauge
needle does not licker, increase N. When the lame
is established adjust the gas low by means of the
screw N. Use a lue gas instrument.
• Change over to max. load, press the switch
“increase”
• Adjust the gas low with V and check at the same
time the combustion values..
• Go back to min. load and check the combustion
value. Adjust if necessary.
• If necessary repeat the controls of the adjustment
made on min. (N) and max.load(V).
• The desired gas low on min. and max. has now
been adjusted by changing the orange and the
red cams. Check the gas low on the gas meter
available on the installation.
10.2 Releasing button:
By pressing the button and snapping it down, the motor
will be released and the damper can easily be turned.
This function facilitates an exchange of damper motor.
Releasing button
N.B. The upper
position is the
standard position
Max. load (red)
Min. load (orange)
Closed damper (blue)
Gas valve (black)
!
Do not forget to set the air and
gas pressure switches after the
adjustment, see special instructions
