Siemens LMV 5 Series, Technical Instructions, Page: 139 / 374

LMV Series Technical Instructions
Document No. LV5 ‐ 1000
SCC Inc. Page 21 Section 4
o. Find and record the %O
2
wet corresponding to the fuel lean limit ( O2 MaxValue ) for
Point 1 and Point 10 by probing or according to burner OEM recommendations.*
p. Find the target %O
2
. For these burners, the target %O
2
for each point will be the %O
2
wet corresponding to emissions compliance (typically CO, NOx). After the target %O
2
is
found, increase the %O
2
and leave the point at least 0.5% O
2
leaner than the target %O
2
.
Record this as the saved value for each curve point.
* NOTE: This information will be needed to commission the O
2
trim, and it is convenient to
obtain this information when commissioning the Ratio Control Curve. When probing the fuel
rich limit, it is not recommended to exceed 200 ppm CO (dry basis) or less than 1.0% O
2
(wet
or dry basis) for any point. When probing the fuel lean limit, it is not recommended to exceed
200 ppm CO or adversely affect flame stability for any point. The LMV52 with the QGO20 O
2
sensor reads %O
2
on a wet basis, while most external exhaust gas analyzers read %O
2
on a dry
basis.
11. After Point 10 values have been saved, press “Esc” to exit CurveParams.
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