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7.2.1.5 Min. output %
Menu / Run / Boiler temp / Min output % (20%)
The lowest output which the boiler to operate with. The ideal setting depends on the fuel and the boiler’s
installation. However as starting point we recommend to use 20 %, then the controller will modulate the
boiler output from 20 % to 100 %.
7.2.2 Stoker screw.
Menu / Run / Stokerscrew
Parameters that control the stoker auger in run mode.
7.2.2.1 Cycle time.
Menu / Run / Stokerscrew / Cycle time (15)
The time is free to be adjusted. However, we recommend that it is set between 10 and 20 sec.
The cycle time is the time it takes from the Stokerscrew start until it starts again.
What value is the best depend on the fuel type.
The easiest way to get a stabile O
2
level, is if we feed in small amount of fuel quite often, and not a lot of
fuel with a long pause between.
7.2.2.2 O2 / Manual controlled
Menu / Run / Stokerscrew / O
2
/Manual controlled (0)
Never set this value higher than 0,8 x the cycle time.
If very difficult fuel is used, it might be an advantage to disconnect the O
2
sensor and control the
stokerscrew manual.
When the value is set to “0” the stoker screw is controlled by the O
2
measurements, but if you set in a
value, the stoker screw will be locked and run that time, when it goes.
To use the function, the controller can’t be modulating, and the value in chapter 7.10.12 have to be set to
100%, and the boiler will run on/off.
7.2.2.3 Max. fuel s.
Menu / Run / Stokerscrew / Max. Fuel s. (5,0)
To avoid that the burning head will be overfilled, it is possible to limit how long time the stoker screw
maximum is allowed to operate.
The best value for this parameter is found by reading how long time the stoker screw is operating when
the boiler is at 100 % output and then add 25 % to this value.
But in some case, by very bad or wet fuel, the max. fuel, can be needed to be lower.
7.2.2.4 Min. fuel s.
Menu / Run / Stokerscrew / Min. Fuel s. (0,1)
It is also possible to adjust the stoker screw’s minimum fuel conveying.
Normally the value is set to 0,1 s. and only in special occasions another setting is selected. Could be very
light fuel.
7.2.3 Oxygen.
Menu / Run / Oxy
The O
2
measurements are important to get the best combustion.
The measured O
2
level, is the O
2
that are let in the flue after the combustion.
With a high output the combustion can use the most of the O
2
and the opposite by low output, then the
rest O
2
will be higher.