291/327
Building Technologies Basic Documentation LMV5... CC1P7550en
20 Flue gas recirculation (FGR) function (LMV50/LMV51.3/LMV52) 22.05.2018
20.2 Parameter for the flue gas recirculation (FGR)
function
Parameter Operating mode FGR defines the way and the point in time auxiliary
actuator 3 is driven to the ratio control curve or to the positions calculated from the flue
gas temperature and the ratio control curve.
FGR-Mode Description
LMV50
LMV51.3
LMV52.2
LMV52.4
Aux3onCurve
Flue gas recirculation (FGR) function is deactivated.
Auxiliary actuator 3 is driven along its parameterized ratio control
curve
● ●
deactivated
After the ignition position, auxiliary actuator 3 is always held at
the minimum position for flue gas recirculation (indicated with #)
and the flue gas recirculation temperature is not evaluated
(display XXX).
This ensures that the system is operated in a safe state if the flue
gas recirculation setting could not be fully realized.
We recommend performing burner startup using this setting prior
to setting the flue gas recirculation curve
●
time
Auxiliary actuator 3 maintains the ignition position until an
adjustable time is reached
● ●
temperature
Auxiliary actuator 3 maintains the ignition position until an
adjustable temperature is reached
● ●
temp.contr.
The position of auxiliary actuator 3 is determined depending on
the flue gas temperature and the ratio control curve.
In addition, the actuator can maintain the ignition position until an
adjustable time (parameter DelaytimeFGRGas /
DelaytimeFGROil) is reached
●
TCautoDeact
Same manner of operation as temp.contr., but the function is
automatically deactivated should the flue gas sensor become
faulty.
The actuator is driven to the minimum flue gas recirculation
(FGR) position and a warning is issued
●
deactMinpos
After the ignition position, auxiliary actuator 3 always maintains
the minimum flue gas recirculation (FGR) position (indicated by #)
and the flue gas recirculation (FGR) temperature is not evaluated
(display of XXX).
The system can thus be driven to a secure state, if it was not
possible to fully complete the flue gas recirculation (FGR)
settings.
It is recommended to use this setting for commissioning the
burner before adjusting the flue gas recirculation (FGR) curve
●
auto deact
Flue gas recirculation (FGR) with temperature compensation was
automatically deactivated. Same operation mode as
deactMinpos, but a warning is issued
●
Caution!
Do not use this setting.
To deactivate the flue gas recirculation (FGR)
function, use deactMinpos.
To Next Page
Loading...
Need help?
General
