Impeller clearance adjustment - in case of minor
maintenance when the pump remains in
application
Tighten the set screws carefully to avoid
bearing damage.
Contaminated pumps
CAUTION
Biological hazard
Minor or moderate personal injury
‐ Flush the pump thoroughly with clean
water and rinse the pump parts after
dismantling.
Troubleshooting
Observe all regulations applying to pumps
installed in potentially explosive
environments.
Make sure that no work is carried out in
potentially explosive atmospheres.
DANGER
Electric shock
Death or serious personal injury
‐ Before starting any work on the
product, make sure that the power
supply is switched off and it cannot be
switched on unintentionally.
DANGER
Electric shock
Death or serious personal injury
‐ The pump must be grounded.
Before diagnosing any fault, make sure
that all rotating parts have stopped
moving.
Technical data
pH value
Pumps in permanent installations can cope with the
following pH values:
Material
variant
Installation pH value
Standard
1)
All types
6-14
1)
1)
Cast iron impeller, pump housing and motor top.
Density and viscosity of the pumped liquid
Density: 1000 kg/m
3
.
Kinematic viscosity: 1 mm
2
/s (1 cSt).
When pumping liquids with a density
and/or a kinematic viscosity higher than
the values stated above, use motors with
correspondingly higher outputs.
Flow rate
Keep a minimum flow rate to avoid sedimentation in
the pipe network. Recommended minimum flow rates:
• in vertical pipes: 0.7 m/s.
• in horizontal pipes: 1.0 m/s.
Ambient temperature
The ambient temperature may exceed 40 °C, up to a
maximum of 60 °C for a short period (maximum 3
minutes).
Altitude
The product operates correctly up to 1000 m altitude
above sea level.
Liquid temperature
0 to +40 °C.
The liquid temperature may be up to 60 °C for a short
period (maximum 3 minutes).
Operating mode
The pumps are designed for continuous operation.
Installation depth
Do not use extended power cables. Only
use a single-piece power cable that is
longer than the depth of installation.
Maximum 20 m below liquid level. Custom variants
may be installed at maximum 30 meters depth, but
not explosion-proof pumps. Power cable length must
always be more than installation depth.
Enclosure class
IP68.
Sound Pressure
Use hearing protection when working
nearby an installation in operation with a
sound pressure level above 70 dB(A).
Motor liquid
The motor is factory-filled with Grundfos SML3 motor
liquid which is frost-resistant until -20 °C. The motor
liquid helps to transfer the heat generated by the
motor to the cooling chamber and to the pumped
liquid to pass on the outside of the pump.
Electrical data
The supply voltage and frequency are marked on the
nameplate.
26
English (GB)
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