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172 305 68 03-01
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 measur-ing P
Br
, (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.
adjustment.
- Start the burner, observe the pressure gauge, if no flame is established
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
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 flow on min. and max. has now been adjusted by
changing the orange and the red cams. 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.
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
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..
Max. load (red)
Min. load (orange)
Closed damper (blue)
Gas valve (black)
Releasing button
N.B.
The upper position is
o
