Operation; Maintenance; Disposal - Grundfos Unolift Series Installation And Operating Instructions Manual

5. Operation

Unolift (one pump)
Two control switches in the control panel activate
a magnetic motor contactor to turn the pump on
and off as water in the basin rises and falls. If an
alarm condition occurs, such as too high water
level, an additional alarm switch will activate the
audio/visual alarm system. An alarm will be reset
automatically once the alarm condition has been
cleared.
Duolift (two pumps)
The control panel alternately controls two pumps,
thus equalizing pump wear. The system provides
override control, should either pump fail. If an
alarm condition occurs, such as too high water
level, an alarm switch will activate the audio/
visual alarm system. An alarm will be reset
automatically once the alarm condition has been
cleared.
See installation manual for SJE
Note
Rhombus simplex/duplex panel.

6. Maintenance

Warning
Flush the lift system with clean
water and disconnect discharge pipe
before carrying out maintenance.
The lift system contents are wastewater or
sewage water containing toxic or harmful
substances. Before carrying out maintenance on
the lift system, make sure that the lift system has
been thoroughly flushed with clean water and
that the discharge pipe has been drained.

7. Disposal

This product or parts of it must be disposed of in
an environmentally sound way:
1. Use the public or private waste collection
service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
10
Subject to alterations.