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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Example:
For a load range of 2.1…22 kW and a speed range of 1,250…6,000 min
-1
(rpm), the
resulting slope is 239 and the y-axis section 742. This means that at a load of 12 kW,
for instance, the speed is 3,610 min
-1
(rpm).
y=m*x+b
12 P[kW]
3610
n[min
-1
]
7471d44/1209
Figure 113: Fan parameters settable as load values via QAA75…/AVS37…- load range
Key
Figure Meaning
3610 Speed value in 1/min
12 Output value in kW
y y coordinate
x x coordinate
m Slope of the line
b y-intercept of the line
P Output [kW]
n Speed [1/min]
The load parameters must be limited by the OEM.
For this purpose, menu Burner control includes parameters that serve as limits for the
following load parameters:
Fan speed heating max (2441)
Fan speed full charging max (2442)
Fan sp start value inst WH (2443)
Fan speed DHW max (2444)
Controller delay speed (2452)
Req speed prepurging min (9505)
Required speed ignition max (9513)
Required speed LF min (9525), and
Required speed HF max (9530)
The following parameters included in the Burner control menu are to be determined
and entered by the OEM:
PrepurgOutpLimOEM ([4777.1])
IgnitionOutpLimOEM ([4778.1])
PartialLoad OutLimOEM ([4779.1])
HF outp OEM limit ([4780.1])
Max output OEM limit ([4781.1])
Min output OEM limit ([4782.1])
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