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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
6.16.3 Setpoints
Line no. Operating line
4110 Setpoint min
The boiler pump is put into operation only when the boiler temperature reaches a
minimum level, in addition to the required temperature differential.
T
4110
0
1
Q10
8560
t
7471d35/0910
Figure 65: Setpoints – setpoint minimum
Key
Line no. Meaning
4110 TFsMin Minimum setpoint
4130 SdTFEin Temperature differential On
4131 SdTFAus Temperature differential Off
8560 TFx Solid fuel boiler temperature
Q10 Solid fuel boiler pump
t Time
T Temperature
The boiler pump is deactivated if the boiler temperature lies below the minimum
setpoint: Temperature of solid fuel boiler < temperature differential Off.
The boiler pump is activated if the boiler temperature exceeds the minimum setpoint by
the switching differential (temperature differential On – temperature differential Off):
(Temperature of solid fuel boiler > minimum setpoint + (temperature differential On –
temperature differential Off).
The criterion of the minimum setpoint is always taken into account, which means that
the function cannot be deactivated.
Note!
If pump overrun is parameterized, the boiler pump will not be deactivated until the
Pump overrun time (4140) has elapsed.
Line no. Operating line
4110 Setpoint min
4130 Temp diff on
4131 Temp diff off
Setpoint min