Siemens LMV51 Series Basic Documentation page 121

12. Actuator positions
during the prepurge
time
Menu level 1 Menu level 2
Params & Display
RatioControl
13. Ignition positions
Menu level 1 Menu level 2
Params & Display
RatioControl
14. Setting the curve
First setting
Note
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HVAC Products
The burner control stops startup during the prepurge phase (Phase 24).
The positions of the actuators for prepurging can thus be set very straightforwardly.
Menu level 3
GasSettings
After the settings have been made, the program stop in the prepurge position should be
replaced by the program stop of the ignition position in Phase 36.
The burner control continues the startup sequence until the ignition position (Phase 36)
is reached. Then, it stops again so that the actuator's ignition positions can be set.
Menu level 3
GasSettings
To verify the ignition positions again, the program sequence can be stopped in interval
phase 44 or 52 (interval with ignited flame on completion of the relevant safety time).
On deactivation of the program stop, the burner continues its program until the operating
phase (Phase 60) is reached.
If no point for the fuel / air ratio control system has as yet been predefined, the first
curvepoint «P1» to be adopted on a preliminary basis are the ignition positions of the
actuators.
The burner travels to the ignition load. The burner's output should now be increased
manually and in steps of the curve setting until the nominal capacity (100 %) is reached.
During the manual procedure, the actuators travel on the interpolated straight line to the
maximum position of 90° at 100 % output. The flue gas values and the stability of the
flame must be constantly checked.
It may be necessary to define provisional curvepoints, which can be canceled again
later.
As soon as the nominal capacity is reached, the burner should be optimized with regard
to flue gas values.
It is recommended to measure the gas throughput at each curvepoint in order to reflect
the real burner output on the display in relation to the maximum gas throughput.
· Press the ESC button to leave the curvepoint setting
· Store the point by pressing ENTER
· Now, select the second curvepoint. The settings of the previous curvepoint will be
adopted on a preliminary basis
· Store the second curvepoint like the first one
Basic Documentation LMV51...
7 Commissioning instructions for the LMV51... system
Menu level 4 Menu level 5
SpecialPositions
PrepurgePos
Menu level 4 Menu level 5
SpecialPositions
IgnitionPos
Menu level 6
PrepurgePosAir
PrepurgePosAux
Menu level 6
IgnitionPosGas
IgnitionPosAir
IgnitionPosAux
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CC1P7550en
29.05.2002