Siemens LMV 5 Series, Технические инструкции, Страница: 135 / 374

LMV Series Technical Instructions
Document No. LV5 ‐ 1000
SCC Inc. Page 17 Section 4
Suggested Ratio Control Curve Commissioning
1. The procedure below assumes the following:
a. Pre ‐ requisites for Basic LMV51 systems or LMV52 systems (from above) are met.
b. Procedure for Configuring (Parameterization of) an LMV5 has been done (from above).
c. This is a first ‐ time commissioning of the LMV5 and the combustion control curve is blank
(no points entered).
d. The burner has been lit off, and is at ignition position.
e. A calibrated stack gas analyzer is sampling the stack gas and can read %O
2
and ppm CO.
f. The boiler has been warmed up to operating temperature / pressure.
2. If activated, set parameter ProgramStop to deactivated. This will permit the ratio control curve
to be commissioned. The ratio control curve can be found under the menu:
Params & Display > RatioControl > GasSettings > CurveParams
3. Go to Point 1. Point 1 is automatically set to ignition position values. When Point 1 is entered,
the AZL will prompt to “change” or “delete” the point. “Change” should be selected. Next, the
AZL will prompt for “Followed” or “Not followed”. “Followed” should be selected. All actuators
and / or VSD that have been activated should show up on this screen. If more than one Aux
actuator or VSD are activated, the screen may need to be scrolled down to show the other
actuators. If an O
2
sensor is being used and is activated, the O
2
reading will also be displayed.
NOTE: Using the “Not followed” option is possible but not recommended for most situations
since the results of changing the actuator positions in “Not followed” mode cannot be seen
real time on a combustion analyzer. When “Followed” is selected, a carat (>) is shown when
the actuators / VSD are moving to the displayed position. A colon (:) is shown when the
indicated positions are reached. A pound (#) is shown when the Aux 3 FGR actuator is being
held at position due to a time or temperature ‐ based FGR hold.
4. If the low fire point is not known (maximum burner turndown), adjust the Point 1 actuator
positions until maximum safe burner turndown is achieved. Record the fuel flow. If the fuel
flow is not available, burner head pressure can be used as a last resort.
Figure 4 ‐ 5: Point 1 on the Ratio Control Curve
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