General Description; Product Drawing; Applications; Operating Conditions - Grundfos SEG Instrucciones De Instalación Y Operación

2. General description

Grundfos SEG pumps are designed with a grinder
system which grinds solid particles into small pieces
so that they can be led away through pipes of a
relatively small diameter.
SEG pumps are used in pressurised systems, e.g. in
hilly areas.
The pumps can be controlled via the Grundfos LC,
LCD 107, LC, LCD 108, LC, LCD 100 pump
controllers or the Grundfos CU 100 control box.
See installation and operating instructions for the
selected unit.

2.1 Product drawing

1
2
3
4
Fig. 1 SEG pump
Pos. Designation
1 Cable plug
2 Nameplate
3 Discharge flange DN 40 / DN 50
4 Discharge
5 Lifting bracket
6 Stator housing
7 Oil screw
8 Clamp
9 Pump foot
10 Pump housing

2.2 Applications

SEG pumps are designed for pumping the following
liquids:
• domestic wastewater with discharge from water
closets
• sewage from restaurants, hotels, camping sites,
etc.
The compact design makes the pumps suitable for
both temporary and permanent installation. The
pumps can be installed on an auto-coupling system
or stand freely on the bottom of the pit.

2.3 Operating conditions

The Grundfos SEG range are designed for
intermittent operation (S3). When completely
submerged, the pumps can also run continuously
(S1). See section
5
Installation depth
6
Maximum 10 metres below liquid level.
Operating pressure
7
Maximum 6 bar.
8
Number of starts per hour
Maximum 30.
pH value
Pumps in permanent installations can cope with pH
values ranging from 4 to 10.
9
Liquid temperature
0-40 °C.
10
For short periods (maximum 15 minutes), a
temperature of up to 60 °C is permissible (non-Ex
versions only).
FM
Note
Density and viscosity of pumped liquid
When pumping liquids with a density and/or a
kinematic viscosity higher than that of water, use
motors with correspondingly higher outputs.
9.2 Operating modes.
Warning
Explosion-proof pumps must never pump
liquids with a temperature higher than 40
°C.
For single-phase pumps of 1.5 kW working
at 10 % overvoltage, pumping 40 °C liquid,
the maximum continuous operating time is
six minutes. If the six minutes are
exceeded, the thermal switch inside the
motor windings might be activated and
cause the pump to stop.
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