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Building Technologies Basic documentation LMV37.4... CC1P7546en
9 Connection to load controllers 17.12.2018
Multistage operation X5-03 (stage 2, pin 3 / stage 3, pin 2)
In multistage operation, 1 or 2 thermostats can be connected to activate the different
burner stages. Multistage operation is possible only when firing on oil.
If neither input «Stage 2» nor input «Stage 3» is active, the burner switches to
«Stage 1».
If input «Stage 2» becomes active, the burner switches to the second stage.
If input «Stage 3» becomes active, the burner switches to the third stage. In that case,
input «Stage 2» can be active or inactive. The third stage can only be activated with 3-
stage operation.
LMV...
Bild 317e/0913
X5-03
L
ON/OFF
Load controller (LR) (OPEN)
Load controller (LR) (CLOSED)
Load controller (LR) (ON/OFF)
Figure 70: 2-stage operation X5-03
LMV...
Bild 318e/0913
X5-03
L
ON/OFF
Load controller (LR) (OPEN)
Load controller (LR) (CLOSED)
Load controller (LR) (ON/OFF)
Figure 71: 3-stage operation X5-03
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