Modulating Operation; 2-Stage Operation - Siemens LMV27.100x2 Basic Documentation

Basic unit with integrated air-fuel ratio control for forced draft burners
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12.2 Modulating operation

Actual value
Voltage
Off
DC 0 V
Ignition load
DC 1 V
Low-fire
DC 2 V
High-fire
DC 10 V
The values between low-fire and high-fire are interpolated in a linear manner.

12.3 2-stage operation

Actual value
Voltage
Off
DC 0 V
Stage 1
DC 5 V
Stage 2
DC 10 V
12.4 3-stage operation
Actual value
Voltage
Off
DC 0 V
Stage 1
DC 3 V
Stage 2
DC 5 V
Stage 3
DC 10 V
Basic Documentation LMV27...
12 Load output X74 pin 3
Curvepoint
Display / output
value
---
Off
P0
10%
P1
20%
P9
100%
Curvepoint
Display / output
value
---
Off
P1
P1
P2
P2
Curvepoint
Display / output
value
---
Off
P1
P1
P2
P2
P3
P3
CC1P7541en
17.12.2018

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