Siemens LMV50 Series Manual page 296

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Building Technologies
If auxiliary actuator 3 still maintains the ignition position (recirculation duct CLOSED), it
is marked with #.
The position value of auxiliary actuator 3 can be changed, but the actuator will not
follow the readjustment for that period of time!
The changed value can also be stored.
If auxiliary actuator 3 is not marked with # when making the setting, it is already on the
ratio control curve, in which case it also follows the readjustment of the position value. If
marked with # or in case of selection without driving, the curve position can be
readjusted without having the actuator following the position value.
Note!
During the time the curve menu is used, the state of the flue gas recirculation (FGR)
function does not change. This means that if auxiliary actuator 3 is still at the Flue Gas
Recirc. position (ignition position) when activating the parameterization of curves, and
it maintains that position until parameterization is completed.
Basic Documentation LMV5...
20 Flue gas recirculation (FGR) function (LMV50/LMV51.3/LMV52)
CC1P7550en
22.05.2018