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4 Design and Functions
The firing rate stages are defined in P531 ... P534 if firing rate controller is realised by the fol-
lowing options:
• Firing rate controller in LCM100
• TPS input at LCM100
•Bus
NOTICE
When using TPS input via X9.x P 531, P 532, P 533 and P 534 are not necessary.
Example for a 2 stage oil burner with firing rate controller by LCM100:
Situation:
• The burner has only one air flap at channel 1.
• The burner is ignited directly at an air flap position of 288 Digit.
This position is stage 1.
•The 2
nd
stage has an air flap position of 793 Digit.
• At air flap position of 520 Digit the valve for the 2
nd
stage is switched ON (P 527).
• At air flap position of 500 Digit the valve for the 2
nd
stage is switched OFF again (P 528),
when switching from the 2
nd
stage to the 1
st
stage.
• As soon as the firing rate request of LCM100 exceeds 430 Digit (P 531) the change over
from 1
st
stage to 2
nd
stage starts.
If the firing rate request of LCM100 drops below 350 Digit (P 532) the change over from
2
nd
stage to 1
st
stage starts.
Sequence:
• The burner starts and remains at the base firing rate of 200 Digit as long as LCM100 does
not request a higher firing rate than 430 Digit.
The air flap remains on a position of 288 Digit.
• If the firing rate request of the LCM100 is 430 Digit, the air flap actuator runs open.
• As soon as a position of 520 Digit is reached, the 2
nd
oil valve is switched ON and the air
flap runs to the operation position of 793 Digit.
The internal firing rate is 300 Digit.
• As soon as the firing rate request of LCM100 drops below 350 Digit the air flap closes
again.
• If the air flap drops below a position of 500 Digit the 2
nd
oil valve is switched OFF.
The air flap runs to a position of 288 Digit. The internal firing rate is 200 Digit.
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