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Building Technologies
Basic Documentation LMV5...
CC1P7550en
20 Flue gas recirculation (FGR) function (LMV50/LMV51.3/LMV52)
22.05.2018
Parameter
Description
Active with flue gas
recirculation (FGR)
without
temperature
compensation
with
temperature
compensation
FRG On Time Gas
or
FRG On Time Oil
Setting of delay time for auxiliary actuator 3 to be kept in the
ignition position after entering phase
OPERATION
●
●
FRG On Temp Gas
or
FRG On Temp Oil
The adjustment of the temperature to be achieved so that
auxiliary actuator 3 moves from the ignition position to the flue
gas recirculation position.
●
FGR sensor
(
X86 PtNi1000 /
X60 Pt1000 /
X60 Ni1000)
Selection of temperature sensors for temperature-compensated
flue gas recirculation (FGR)
●
●
FGR factor gas
or
FGR factor oil
Readjustment of calculated temperature-dependent position of
auxiliary actuator 3.
The setting is made in steps of 1%.
100% means no readjustment.
Settings <100% reduce the amount of recirculated flue gas
(moving the damper toward the fully closed position).
The factor has an impact only when there is a deviation from the
learned flue gas recirculation (FGR) temperature.
This means that when reaching the initially acquired flue gas
recirculation (FGR) temperature, the stored position is
approached, independent of the flue gas recirculation (FGR)
factor.
See the
Examples of tables showing the damper positions with
FGR
●
FGR Minpos
Minimum limitation of position of auxiliary actuator 3 for
temp.comp.
and
TCautoDeact
modes.
The setting is made as an absolute value and ensures that flue
gas recirculation (FGR) always operates with at least a
minimum amount of flue gas.
The position is also used to ensure a defined damper position
for emergency operation or automatically deactivated flue gas
recirculation (FGR)
●
FGR Maxpos factor
Maximum limitation of the required position of auxiliary actuator
3 calculated from the current temperature and the warm
position.
The setting is made in steps of 1% and refers to the relevant
curvepoint.
Interpolation between the curvepoints is linear
●
Β
Note!
Parameter
FGR sensor
:
The configuration of the selected sensor must be correctly made!
Example of X60 Pt1000:
Select suitable measuring range from the load controller menu. If not observed, an
error message due to Pt1000 sensor line interruption might appear!
