Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
6 Operation
83054802 1/2018-07 La
102-228
6.10.3 O2 trim
Param & Display
O2Ctrl/Limit
GasSettings
OilSettings
O2 Control
The W-FM monitors the O
2
content in the flue gas using a sensor on the O
2
mod-
ule.
With new sensors or if the sensor has been switched off for extended periods,
moisture may form in the sensor and distort the measured value. A longer heat-up
process through the internal sensor heating displaces this moisture.
Heat up the sensor prior to adjusting the O
2
trim.
Parameter
LowFireAdaptPtNo
can be used to set from which load point O
2
trim is possible [ch. 6.10.4].
During commissioning, in parameter
O2 Control
standardisation is carried out
at each point from the load point determined up to full load and the O
2
setpoint is
determined. During standardisation the air influencing actuators drive open on the
compound curve according to the standardised value and reduce the air quantity,
the fuel quantity remains unchanged.
No standardisation is carried out in load point 1, the reference line between load
point 1 and load point 2 only serves to reduce air. To ensure O
2
trim is possible
across the entire load range, point 1 must be approx. 50 % below partial load
(point 2).
In the load point set under
LowFireAdaptPtNo
and the last load point (full load)
the W-FM carries out an adaption. In these two points, the W-FM drives back to
the compound curve after saving. The delay time before the O
2
content at the
sensor changes is saved as time constant Tau.
The setpoint for O
2
trim should be approx. 0.5 … 1 %point above the
O02 Min-
Value
of the O
2
monitor.
The O
2
value in the load points of the compound curve should be approx.
2 % points above the setpoint for O
2
trim.
Summary of Contents for W-FM 100
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