O 2 Trim Configuration (Parameterization) Before Commissioning - Siemens LMV5 Series Technical Instructions
Linkageless burner management system
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LMV Series
The O
Ratio Control Curve reflects the %O
2
The O
Control Curve is the target for the O
2
transitioned from the O
Ratio Control Curve to the O
2
Value, the Lambda Factor will be learned and recorded at that specific point. A larger gap between the
O
Ratio Control Curve and the O
2
Lambda Factor of the burner, and thus yield the best pre‐control when the burner is modulating. A gap
of 1% O
or more is ideal, and it is typically achievable on nozzle mixing burners with no or low
2
percentages of FGR. A 1% gap is typically not achievable on premix mesh burners or on nozzle mixing
burners that use a high percentage of FGR. This gap also sets the available quantity of "lean" trim for an
LMV52.240, and that is why the minimum recommended gap for an LMV52.240 is 1%. The LMV52.440
uses a different O
trim algorithm for premix, mesh and high percentage FGR burners and can deal with
2
a minimum gap of 0.5%.
O
Trim Configuration (Parameterization) Before Commissioning
2
The procedure below assumes an LMV52 with default parameters for the O2 Contr/Alarm menu and the
O2 Module menu. If the LMV52 is mounted to a burner / boiler, the burner / boiler OEM may have
already changed the parameters from the default setting and parameterized the LMV52 for the
application. This procedure also assumes that all O
and that the O
trim will be commissioned on natural gas.
2
Section 3 gives a detailed explanation of all of the parameters in the LMV52 as well as highlights which
parameters must be set (marked with a double asterisk **) and which parameters are frequently used
(shaded).
This procedure gives a general guideline of what parameters need to be set on both a traditional nozzle
mixing burner with little to no FGR, and also for low and ultra‐low NOx burners that are pre‐mix mesh
type or high percentage FGR. Every burner is different, so it is likely that every burner will need a
somewhat unique parameter set to run correctly.
1. Log in at the OEM password level. From the factory, the OEM password for the LMV5 is "START".
2. If not done so already, activate the O
Params & Display > O2 Module > Configuration > O2 Sensor = QGO20
3. If being used, configure the appropriate temperature sensors for blower inlet air temperature and
stack temperature. This is done through the following menu path:
Params & Display > O2 Module > Configuration > SupAirTempSens
Params & Display > O2 Module > Configuration > FlueGasTempSens
Parameter SupAirTempSens activates and configures the blower inlet air temperature sensor.
Parameter FlueGasTempSens activates and configures the stack temperature sensor. Options are
Ni1000 or Pt1000 2‐wire sensors for both inputs.
SCC Inc.
that resulted from setting the Fuel‐Air Ratio Control Curve.
2
trim system when it is activated. When the burner is
2
Control Curve by increasing the Standardized
2
Control Curve will give the LMV52 the best opportunity to learn the
2
trim components are installed and wired correctly,
2
sensor using the following menu path:
2
Page 7
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Technical Instructions
Document No. LV5‐1000
Section 6
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