06/2011 - Art. Nr. 13 018 118C
44
Choosing the power control type
The burner is three-stage. It offers
different possibilities for power
controlling
1. Two-stage regulating with 1
st
stage as an ignition stage and
power controlling between 2
nd
stage
(part-load) and 3
rd
stage (full-load)
Factory wiring, recommended if normal
use of power control ratio
(60-70%:100%), suits to 2-stage power
controllers.
The burner starts in 1
st
stage. After
regulator control release, burner moves
automatically to 2
nd
stage (part-load).
Burner then operates, as a function of
heat request from the boiler regulation,
between 2nd and 3rd stage. In manual
operation, the burner can be adjusted in
either of the three stages.
2. Two-stage regulating with 1
st
stage as ignition stage and
part-load and power controlling
between 1
st
stage (part-load) and
3
rd
stage (full-load), while 2
nd
stage
remains as a changeover stage.
Option "1" in wiring diagram,
recommended if a wide regulation
range is required (over 60% - 100%),
suits to 2-stage power controllers.
The burner starts in 1
st
stage. (Ignition
and part-load). If a higher heat request
comes from the boiler regulation, the
burner switches to 3
rd
stage (full-load).
For a smooth changeover between 1
st
and 3
rd
stage, the 2
nd
stage is used
during the power rise as a straight
through stage.
3. Three-stage regulating with 1
st
stage as both ignition stage and
part-load, 2
nd
stage as medium
high-load, 3
rd
stage as full-load.
Option "2" in wiring diagram, recom
-
mended if a wide regulation range is
required; a three-stage power control
-
ler is required.
The burner starts in 1
st
stage. (Ignition
and part-load) and switches to 2
nd
stage (medium-highload) if a higher
heat request comes from the boiler
regulation, and to 3
rd
stage (full-load) if
a further high heat request comes from
the boiler regulation.
Start-up
Choosing the power control type
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