Weishaupt W-FM 200 User Manual

Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
6 Operation
83054802 1/2018-07 La
97-228
6.10 O2 controller
O2 trim is only possible in modulating operation with W-FM 200 with O2 module.
O2 trim is fuel specific and must be set separately for each fuel on dual fuel burn-
ers.
O2 trim and O2 monitor in conjunction with the O2 residual content are at the com-
bustion limit and the resulting O2 compound curve.
An idealised minimum O2 value is advantages for the control behaviour. When op-
timising the minimum O2 value increase rather than decrease. In conjunction with
CO control (accessory) the minimum O2 value must be set to ap-
prox.0.25to0.5percentage points below the combustion limit.
0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
6,0
6,5
0
10
20
30
40
50
60
70
80
90
100
2
1
3
4
5
6
1 Burner capacity [%]
2 O2 content in the flue gas [%]
3 O2 residual content at the combustion limit
4 Minimum O2 value for O2 monitor
5 O2 setpoint for O2 trim
6 O2 compound, excess air in the load points 20to 25%
With frequency converter
On burners with frequency converter, parameter VSD can be used to determine if
the frequency converter is to be included in O2 trim [ch.6.9.3].
Pre-control
The O2 controller is equipped with a pre-control function. The pre-control calcu-
lates the air ratings reduction for the entire load range relative to the fuel on the
basis of measured values during commissioning. If the load is changed, the air influ-
encing actuators drive to the calculated position, whilst the fuel actuator drives to
its load position. O2 trim is only activated if temperature or air pressure deviations
occur and and then drives the air influencing actuators.
To ensure the pre-control operates correctly, the load apportionment must match
the fuel throughput in each load point [ch.6.9.5].

Weishaupt W-FM 200 Specifications

General

Brand	Weishaupt
Model	W-FM 200
Category	Controller
Language	English