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Building Technologies
Basic Documentation LMV5...
CC1P7550en
19 O2 trim control with LMV52 and PLL52
22.05.2018
∂
Linear progression of O2 value between the curvepoints
The O2 value between the curvepoints should progress in a linear fashion. To
make checks, approach load positions between the curvepoints and check the O2
value. If the progression is not linear, additional curvepoints should be set and the
O2 progression should be appropriately corrected.
1
2
3
4
5
6
O
2
(%)
100 %
Load (%)
Linear (good progression of O
2
)
O
2
ratio control
Nonlinear (poor progression of O
2
)
Set additional curvepoints
75
50
d3
2e
/0
90
3
Figure 124: Linear progression of O2 value between the curvepoints
∂
Checking the transfer range between damper and VSD
When using several air-regulating actuators (e.g. air damper or VSD), it should be
made certain that the curves are as smooth as possible. Irregularities should be
avoided.
90°
100%
Load (%)
VSD
Damper
7
5
5
0
d
36
e
/1
0
1
2
Figure 125: Checking the transfer range between damper and VSD
____
good
------
poor
