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7 Instructions on Commissioning and Maintenance
7.2.4 Settings
7.2.4.1 Sensitivity
If for the first burner start there is no flame detection then the sensitivity switch (flame ampli-
tude) can be set towards the right-hand stop position to allow a stable flame detection. The
positions 1 - 6 and/or 7 - 12 are allocated to the internal amplification of the flame signal. Po-
sition 1 and/or 7 means lowest amplification / sensitivity as well as 6 and/or 12 highest ampli-
fication / sensitivity in the related sensitivity range.
NOTICE
Ensure that the flame detector is configured such that the device successfully reacts by indi-
cating 'Flame Out' should the flame be either not burning correctly or be extinguished.
After having carried out a correct burner adjustment, reduce the sensitivity again to such an
extent as to allow for a stable and safe operation. The measurable signals should have at least
2 to 3 times the switching threshold value of 25 mV AC to allow a reliable recognition
7.2.4.2 Alignment with Adjustment Function
To allow an optimum alignment of the compact flame detector towards the flame (maximum
flame amplitude), the intensity indicator of the device can be used by activating the ’Adjust’
function switch. The activation of the ’Adjust’ switch (ON position) suppresses the function of
the Serv. switch. The intensity indicator now represents flame amplitude detected.
If the intensity has already been set to maximum in this function, reduce the sensitivity of the
active sensitivity switch to such a level that a reaction of the intensity indicator can be noticed,
in order to find the best possible view to the flame by alignment.
After having completed the adjustment work and/or before optimisation set the Adjust switch
back to OFF.
The values can slightly tolerate depending on the application
Flame amplitude Measurement
points
LED lights 20 mA Current loop
Flame off < ca. 25 mVAC keine < ca. 5%
2 times threshold response 50 mVAC ca. 2. (yellow) ca. 25%
3 times threshold response 75 mVAC ca. 4. (green) ca. 50%
4 times threshold response 100 mVAC ca. 5. (green) ca. 85%
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