Operating The Product; Setting The Start Levels - Grundfos UNOLIFT Series Installation And Operating Instructions Manual

7. Operating the product

The lifting station is designed to operate
automatically according to the liquid level in the tank.
With a controller, you can easily change settings,
monitor the system or perform fault finding.
You can download the installation and operating
instructions of the controller with the following links
and QR codes.
LC 220
http://net.grundfos.com/
qr/i/98503252
Start
level
500
450
350
250
180
Start
level
500
450
350
250
180
Fig. 25 Recommended start levels in relation to the inlet height and pipe configuration
20
LC 221
http://net.grundfos.com/
qr/i/98503253

7.1 Setting the start levels

The optimum start level is closely related to the
chosen inlet height and pipe configuration. The start
level must be as high as possible to increase the
effective tank volume and reduce the number of
start/stops of the pumps. A too high start level,
however, may increase the backflow in the inlet pipe
and thus increase the risk of deposits in the inlet
pipe.
The figures below show the recommended start
levels in relation to the inlet height and pipe
configuration.
You can select all the values with LC 221. With LC
220, you can select the lowest or highest value.
Start
level
500
450
350
250
180
Start
level
500
450
350
250
180