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Building Technologies Division
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
output/speed slope
(9626) and
defined by the OEM.
For that, as described in chapter Burner control, flag Release QAA fan param [4337.1]
must be set to On.
Figure 112: Fan parameters settable as load values via QAA75.../AVS37...- presetting load values via
the operator terminal
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
User Manual LMS14...
6 The settings in detail
Fan output/speed Y-section
Fan
(9627). It must be
CC1U7471en
28.01.2015
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