Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
6 Operation
83054802 1/2018-07 La
92-228
6.9.6 Operating and switch points, multi-stage operation
Param & Display
RatioControl
OilSettings
CurveParams
CurveSet
Two or three stage operation is specified depending on the burner execution. A
three stage burner can also be operated two stage with low impact start or
change-over release. The change-over behaviour between the operating stages is
optimised via separate switch on and off points.
Operating stages
BS1, BS2, BS3
(1
Excess air for the relevant fuel quantity is set in the operating stages.
Switch-on points
ES2, ES3
(1
In the switch-on point, the air quantity for the change-over process into the next
higher stage is set.
If the switch-on point is exceeded, the solenoid valve of the next stage opens.
If the switch-on point is activated directly the solenoid valve remains closed, only
the air influencing actuators drive to the switch-on position and the flame stability
can be checked prior to the change-over.
Switch-off points
AS2, AS3
(1
In the switch-off point, the air quantity for the change-over process into the next
lower stage is set.
If the switch-on point is not maintained, the solenoid valve of the previous stage
closes. Switch-off points must not be activated directly, as the solenoid valve of
the previous stage remains open and only the air influencing actuators drive to the
switch off position. This leads to soot formation caused by insufficient air.
(1
BS3, ES3
and
AS3
only with three stage operation
2
1
5
3
4
1
Air damper position
2
Operating stage 1 (
BS1
)
3
Switch-on point 2 (
ES2
), solenoid valve stage 2 opens above
4
Operating stage 2 (
BS2
)
5
Switch-off point 2 (
AS2
), solenoid valve stage 2 closes below