Siemens LMV 5 Series, Технические инструкции, Страница: 189 / 374

LMV Series Technical Instructions
Document No. LV5 ‐ 1000
SCC Inc. Page 17 Section 6
b. Make the burner drive to Point 2 immediately after light off. This can be done by setting
parameter StartPointOp to 2 using the following menu path:
Params & Display > RatioControl > Gas Settings > StartPointOp = 2
18. If the burner needs air temperature compensation after light off (most ultra ‐ low NOx mesh
burners), activate air temperature compensation. Multiple modes of temperature
compensation are available; the most often used mode is “IgnPtWithTC”. This mode will enable
temperature compensation after light off and at Point 2 before the O
2
trim engages.
Temperature compensated light off can be activated using the following menu path:
Params & Display > O2Contr/Alarm > Gas Settings > Startmode > Startmode
NOTE: Air temperature compensation requires an air temperature sensor wired to the
LMV52.440.
See “
O
2
Trim Configuration (Parameterization) Before Commissioning” above for
more information.
19. The O
2
trim can now be activated in one of two modes. Mode “conAutoDeac” allows the O
2
trim to work as long as the measured %O
2
does not exceed the rich limit ( O
2
Alarm ) or the lean
limit ( O
2
MaxValue). If either of these limits is exceeded, the O
2
trim will deactivate and the
burner will run on the normal Ratio Control Curves. Mode “O2 Control” also allows the O
2
trim
to work, except that if the limits are exceeded a lockout will occur. Mode “conAutoDeac” is
typically used. To set the O
2
control operating mode, use the following menu path:
Params & Display > O2Contr/Alarm > Gas Settings > OptgMode
20. The O
2
trim is now commissioned and activated. Some additional tuning may be required
depending on the application. See "Post Commissioning Tuning" later in this section for more
information.
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