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Building Technologies
Basic Documentation LMV5...
CC1P7550en
20 Flue gas recirculation (FGR) function (LMV50/LMV51.3/LMV52)
22.05.2018
20.3 Setting electronic fuel-air ratio control in
connection with flue gas recirculation (FGR)
20.3.1 Settings in
Time
or
Temperature
mode (without
temperature compensation)
The curve of auxiliary actuator 3 can be set the same way as fuel-air ratio control.
Recommendation:
Commission the plant with no influence from flue gas recirculation (FGR).
This enables the fuel-air ratio control system to be set as if the plant operated without
flue gas recirculation (FGR).
For that purpose, in flue gas recirculation (FGR) mode
Time,
set the switch-on time to
its maximum or parameterize it at such a level that auxiliary actuator 3 will not be
positioned until the curve settings become active.
Analogously, in flue gas recirculation (FGR) mode
Temperature,
set the
switch-on
temperature
to a level that cannot be reached.
After completing the settings of the fuel-air ratio control curves without flue gas
recirculation (FGR), the actual settings with an active auxiliary actuator 3 can now be
made.
Since this might have an impact on the combustion settings, the fuel- and air-regulating
actuators may have to be readjusted.
Select the required curvepoint, then continue by pressing
Enter
.
⇒
P
o
i
n
t
I
P
o
i
n
t
:
3
I
c
h
a
n
g
e
?
H
a
n
d
I
d
e
l
e
t
e
?
I
The pointer position can vary between
change
and
delete
. To edit the curvepoint, select
change
here.
- Continue by pressing
Enter
⇒
New:
Select whether the actuators shall follow the adjustment (only during operation).
A
c
t
u
a
t
o
r
-
P
o
s
i
t
i
o
n
s
F
o
l
l
o
w
e
d
N
o
t
f
o
l
l
o
w
e
d
- Continue by pressing
Enter
⇒
P
o
i
n
t
I
P
o
w
e
r
:
2
3
.
5
:
3
I
F
u
e
l
:
2
3
.
2
H
a
n
d
I
A
i
r
:
4
1
.
6
I
A
u
x
3
#
3
3
.
3
