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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
Line no. Operating line
2528 Swi diff output red
Here, the switching differential for limiting the output is set. The switching differential
defines the working range of output limitation from 100% (no limitation of output) to 0%
(limitation to minimum output = low-fire).
Output limitation becomes active when the boiler flow temperature reaches a level lying
this switching differential below the threshold for output limitation (Boil temp out red
(2527)). The more the boiler temperature rises, the more the output is limited. When the
boiler flow temperature reaches the threshold for limiting the output (Boil temp out red
(2527)), the output is limited to the minimum.
Note!
Output limitation works with absolute values. This means that with a limitation set to
50% absolute output, for instance, the resulting relative burner output differs from
50%.
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Figure 48: Limitation of output – switching differential output reduction
Swi diff output red
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