Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
3 Product description
83054802 1/2018-07 La
30-228
3.3.16 External load controller (X5-03)
For operation with load controller via contacts, parameter
LC_OptgMode
must be
set to
ExtLC X5-03
see [ch. 6.12.2]. The contact for heat demand is connected
to input X5-03:1 (burner ON/OFF).
2
3
4
X5-03
ON/OFF
1
3
2
L
Modulating operation with load controller
If input X5-03:2 (CLOSED) is activated, the burner capacity reduces.
If input X5-03:3 (OPEN) is activated, the burner capacity increases.
If none of the two inputs is activated, the burner capacity remains unchanged.
P
P
2
3
4
X5-03
ON/OFF
1
3
2
L
2
3
4
X5-03
ON/OFF
1
3
2
L
P
P
P
P
P
Modulating operation with thermostat
If thermostats or pressure regulators are connected to inputs X5-03, the modulat-
ing fuel can only be operated in sliding two stage operation.
At heat demand input X5-03:2 (CLOSED) is activated and the burner drives to par-
tial load. If the temperature drops below the value set, input X5-03:3 (OPEN) is ac-
tivated and the burner drives to full load.
Multi-stage operation (fuel oil only)
2
3
4
X5-03
ON/OFF
1
3
2
L
Two and three stage:
Input
Operating mode
two stage
three stage
X5-03:1
Stage 1
Stage 1
X5-03:2
Stage 1
Stage 2
X5-03:3
Stage 2
Stage 3
P
P
2
3
4
X5-03
ON/OFF
1
3
2
L
P
P
2
3
4
X5-03
ON/OFF
1
3
2
L
Low impact start:
At heat demand and with the bridge between terminal 1 and 2 the burner ignites in
stage 1 and then automatically drives to stage 2. If input X5-03:3 is also activated
the burner drives to stage 3.
Alternatively, low impact start can be carried using a change-over contact.
P
P
2
3
4
X5-03
ON/OFF
1
3
2
L
Change-over release:
A bridge connects terminals 2 and 3. At heat demand the burner drives to stage 1.
If inputs X5-03:2/3 are then activated simultaneously the burner drives via stage 2
to stage 3.
