Suggested O 2 Trim Commissioning - Traditional Nozzle Mixing Burner With No Or Low Percentage Fgr (Typically Lmv52.240) - Siemens LMV5 Series Technical Instructions

LMV Series
Suggested O Trim Commissioning ‐ Traditional Nozzle Mixing Burner with No or Low
2
Percentage FGR (Typically LMV52.240)
1. The commissioning procedure assumes the following:
a. All Pre‐Requisites for an LMV52 system with O
according to Section 4 of this literature.
b. The Ratio Control Curves have been commissioned according to Section 4 of this literature.
c. Section 6 of this literature has been read and understood up to this point.
2. As was the case for the Ratio Control Curves in Section 4, the same free spreadsheet can also be
used to assist in the commissioning of the O
curves as well as provides an orderly way to record the details of how the burner was set up.
3. The key to commissioning the O
Specifically, the following must be achieved for each point on the Ratio Control Curves (as
paraphrased from Section 4 of this literature):
a. Safe, efficient combustion as verified by a calibrated stack gas analyzer
b. The % load matching the fuel flow within +/‐ 3%
c. Emissions compliance
d. Smooth Ratio Control Curves (no sharp peaks or valleys)
e. VSD speed should increase with load in a linear fashion (if equipped)
f. Find and record the %O
by probing.*
g. Find and record the %O
Point 10 by probing.*
h. Last but not least, leave the curve points so that the %O
(O2 Alarm value). Record this as the "saved" value for each curve point.
* NOTE: When probing the fuel rich limit, it is not recommended to exceed 200 PPM CO (dry basis)
or less than 1.0% O (wet or dry basis) for any point. When probing the fuel lean limit, it is not
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recommended to exceed 200 PPM CO or adversely affect flame stability for any point.
SCC Inc.
trim (and VSD if equipped) have been met
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trim. This spreadsheet graphically illustrates the O
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Figure 6‐3: LMVx Curves Spreadsheet
curves quickly and easily is contained in the Ratio Control Curves.
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wet corresponding to the fuel rich limit (O2 Alarm value) for each point
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wet corresponding to the fuel lean limit (O2 MaxValue) for Point 1 and
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Technical Instructions
Document No. LV5‐1000
wet is 2% higher than the fuel rich limit
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Section 6