Setting Air Damper; Damper Motor, Air Volume; Adjustment Of Gas Flow - Bentone BG 450 LN Installation And Maintenance Instruction

4.11 Setting Air damper

4.12 Damper motor, air volume

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
4.13 Adjustment of gas flow
- Before the burner starts vent the lines to make sure that there is gas
available at the multibloc
- Use an allen key size 2,5 mm for adjusting N and V.
- Connect a pressure gauge for measuring PBr, (advisable to find 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. adjust-
ment.
- Start the burner, observe the pressure gauge, if no flame is esta-
blished and the pressure gauge needle does not flicker, increase N.
When the flame is established adjust the gas flow by means of the
screw N. Use a flue gas instrument.
- Change over to max. load, press the switch "increase"
- Adjust the gas flow with V and check at the same time the combusti-
on 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).
- Increased power on minimum and maximum have now been adjusted
by changing the orange cam and red cam. Check the gas flow on the
gas meter available on the installation.
- Note! Do not forget to set the air and gas pressure switches after the
adjustment, see special instructions.
- 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 positiont
Solenoid valve
High capacity (black)
High capacity (red)
Low capacity (orange)
Closed damper (blue)
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