Siemens SITRANS LUT400 - Saving Energy

General Operation
7.7 Pump Control
SITRANS LUT400
Operating Instructions, 07/2019, A5E33329501-AC
115
A range of 0.5 meters is used to vary the setpoint. The randomly-selected setpoints are
always inside the ON and OFF setpoints.
①
Random setpoint range
②
ON setpoint
③
Level setpoint variation
④
OFF setpoint
7.7.6.5 Saving energy
Pumps can use different setpoints at different times of the day to account for variable energy
costs.
The following example illustrates high energy cost usage reduction and/or elimination by
using the SITRANS LUT400 Energy Savings function on a wet well (pump down application)
using pump 1.
Pre-requisite: enable Energy Savings function (set Enable (2.7.2.2.1.) (Page 189) =
Enabled)