CAUTION
Crushing hazard
Minor or moderate personal injury
‐
Do not put your hands or any tool into
the pump inlet or outlet port after the
pump is connected to the power supply
unless the main switch is locked in po-
sition 0.
‐
Make sure that the power supply can-
not be switched on unintentionally.
Always use Grundfos accessories to en-
sure correct functioning.
If the installation has to be tested at a
pressure higher than 1.3 times the maxi-
mum pump head, isolate the pump from
the installation before the test to avoid
damage to the pump.
4.2 Foundation
To ensure minimum vibration levels, all parts of the
system must be sufficiently stiff and firmly anchored:
•
The foundation and concrete must be adequate to
support the weight of the pump, including
accessories, the weight of the liquid passing
through the pump and the forces generated by the
pump.
•
The mass of the concrete foundation must be a
minimum of three to five times the mass of the
supported equipment and must have sufficient
rigidity to withstand the axial, transverse and
torsional loadings generated by the pump.
•
The foundation must be 15 cm wider than the
base plate or base stand for pumps up to 350 kW
and 25 cm wider for larger pumps.
•
The concrete used in the foundation must have a
minimum tensile strength of 250 N/cm
2
.
•
Always use epoxy grout to fasten the pump base
plate to the foundation.
Pull-out strengths for anchor bolts
Installation type H and D.
Dry installation
Bolts
Pull-out strength
[kN]
DN 400
6 x M24
25
DN 500
DN 600
DN 800
The pull-out strengths stated are without
safety factor. The required safety factor
may depend on the materials and the
methods used for anchoring.
4.3 Mounting the product
4.3.1 Installation on auto coupling
Lowering the pump onto auto coupling
The pump can easily be pulled out of and lowered
into the pit by the guide rails. The stop level is lower
for installation type C than for installation type S. See
fig. Stop levels for auto-coupling installations.
TM033066
Upper guide-rail bracket
TM033068
Intermediate guide-rail bracket
Correct plinth height for installation on auto coupling
is important to obtain the best efficiency of the pump.
17
English (GB)
Summary of Contents for ST-55-520
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