Siemens LMV51 Series - Page 288

288/301
Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 19 Addendum 4: LMV52... with O2 trim control and O2 module 13.08.2004
•
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 O
2
value. If the progression is not linear, additional curvepoints should be set and the
O
2 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
7550d32e/0903
•
Checking the transfer range between damper and VSD
When using several air-influencing actuators (e.g. air damper or VSD), it should be
made certain that the curves are as smooth as possible. Irregularities should be
avoided.
O
2
(%)
Load (%)
7550d36e/0903
VSD
Damper
____
Good
------
Poor