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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 8 Connection to load controllers 01.12.2009
Multistage operation X5-03 (stage 2, terminal 3 / stage 3, terminal 2)
In multistage operation, one 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/1109
X5-03
Load controller (LR) (ON / OFF)
L
ON / OFF
Figure 34: 2-stage operation X5-03
LMV...
Bild 318e/1109
X5-03
L
Load controller (LR) (OPEN)
Load controller (LR) (CLOSED)
Load controlle r (LR) (ON / OFF)
ON / OFF
Figure 35: 3-stage operation X5-03
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