Grundfos DUOLIFT Series, Installation And Operating Instructions Manual

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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.
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.
Fig. 25 Recommended start levels in relation to the inlet height and pipe configuration
LC 220 LC 221
QR
9
8
5
032
52
QR
9
8
5
032
53
http://net.grundfos.com/
qr/i/98503252
http://net.grundfos.com/
qr/i/98503253
TM0
6
6
49
1 1
5
1
6
TM0
6
6
48
9 1
5
1
6
TM
0
6
6
49
0 1
516
TM
0
6
6
48
8 1
516
180
350
450
250
500
Start
level
180
350
450
250
500
Start
level
180
350
450
250
500
Start
level
180
350
450
250
500
Start
level