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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Presetting load values via the operator terminal
For the extension to enter load variables, the sequence of phases necessitates a
conversion of load values to speed values. Internally, the sequence of phases
continues to make the calculation based on speed values. The load values are made
available via the operator terminal to be converted to speeds based on a linear
equation predefined by the OEM. The linear equation is predefined via
Fan
output/speed slope
(9626) and Fan output/speed Y-section (9627). It must be
defined by the OEM.
For that, as described in chapter Burner control, flag Release QAA fan param [4337.1]
must be set to On.
7471d41e/0111
Figure 112: Fan parameters settable as load values via QAA75…/AVS37…- presetting load values via
the operator terminal
Key
Line no. Meaning
9505 N_Vor Minimum speed required for prepurging
9513 N_ZL Maximum speed required for ignition
9525 N_TL Minimum speed required for low-fire
9530 N_VL Maximum speed required for high-fire
P_TL Output low-fire
P_VL Output high-fire
P_VL_Hz Output in heating mode
P_ZL Output ignition
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