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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
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