35
High capacity (red)
High capacity (black)
The damper motor turns the damper between three pre-set positions: fully
If the air volume needs changing: Remove the cover of the damper motor
Adjust the operating switch to full load (ll).
* Reduce the air volume:
* Increase the air volume:
Adjust the operating switch back to low load and check the air volume.
Adjust the operating switch to low load (l).
* Reduce the air volume:
* Inrease the air volume:
Adjust the operating switch to low load and check that the correct air
DAMPER MOTOR MODULATING
Air adjustment
Releasing button
Max. load (red)
Min. load (orange)
Closed damper (blue)
Gas valve (black)
Releasing button
N.B.
The upper po-
sition is the stan-
dard position
DAMPER MOTOR MODULATING
- 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 measur-ing P
Br
, (advisable to fi nd 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 fl ame is esta-
blished and the pressure gauge needle does not fl icker, increase N.
When the fl ame is established adjust the gas fl ow by means of the
screw N. Use a fl ue gas instrument.
- Change over to max. load, press the switch “increase”
- Adjust the gas fl ow with V and check at the same time the combus-
tion values.
- Go back to min. load and check the combustion value. Adjust if ne-
cessary.
- If necessary repeat the controls of the adjustment made on min. (N)
and max.load(V)
- The desired gas fl ow on min. and max. has now been adjusted by
changing the orange and the red cams. Check the gas fl ow 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
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
Releasing button
By pressing the button and snapping it down, the motor will be relea-
sed and the damper can easily be turned. This function facilitates an
exchange of damper motor..
Summary of Contents for BG 550 LN
Page 4: ...4...
Page 48: ...48...
Page 51: ......
Page 52: ...Enertech AB P O Box 309 SE 341 26 Ljungby www bentone se www bentone com...
