Related information
6.1.2 Dry-running protection
If the pump is running and the liquid level in the
borehole, tank or basin is drawn below the level
sensor, the dry-running protection will stop the pump
to ensure that it is not damaged. A level sensor fixed
on the power cable ensures that the pump operation
stops before dry running occurs.
After a stop caused by dry running, the pump
is automatically reset when the level sensor is again
submerged in the liquid, and the pump will
restart after 5 minutes.
6.2 Intended use
This product is intended for the following applications:
•
groundwater supply for private households,
irrigation systems, and small waterworks
•
liquid transfer in tanks
•
pressure boosting.
Only use the product according to the
specifications stated in these installation
and operating instructions.
6.2.1 Drinking water
If the product is used for drinking water, the following
precautions must be taken to avoid contamination:
•
Before use, make sure that the product does not
come into contact with dust or with chemicals not
suitable for contact with drinking water,
for example lubricants, greases, or oils.
•
If the pump is used with potentially toxic liquids, it
can no longer be used for drinking water.
•
In case of maintenance, be sure to always use
original parts to maintain the initial hygienic
characteristics of the product.
6.3 Pumped liquids
The product is suitable for pumping clean, thin, non-
aggressive and non-explosive liquids without solid
particles or fibres.
Viscosity
Pumping liquids with a higher viscosity than that of
water will cause head loss and a higher power
consumption.
If liquids with a viscosity higher than that of water are
to be pumped, please contact Grundfos.
pH value
5 to 9
Liquid temperature
Observe the maximum liquid temperature of 40 °C
under all conditions to ensure sufficient cooling of the
motor.
Maximum sand content
Sand in the liquid will reduce the life of the pump and
increase the risk of blocking.The sand content of the
pumped liquid must not exceed: 50 g/m³.
6.4 Identification
6.4.1 Nameplate for SQF 3" pumps for EU
Nameplate for SQF 0.6, SQF 1, SQF 1.2, SQF 2.5.
The nameplate is engraved into the pump sleeve.
1
3
7
10
8
13
2
6
9
20.5
12
20.11
20.9
20.4
4
5
20.12
11
20.1
TM080052
Example of nameplate for a SQF 3" pump
Pos.
Description
1
Product number
2
Type designation
3
Pump generation
4
Pump net weight
5
Type and size of connecting thread
6
Pump unit
7
Year/Week
8
P1= Factory code
13
English (GB)
