Foundation; Mounting The Product; Permanent, Vertical, Submerged Installation On Auto Coupling - Grundfos SE Serie Notice D'installation Et De Fonctionnement

6.1 Foundation

Foundations for pumps above 15 kW
The rotating equipment generates vibrations when an impeller or
rotor is turning at high speed. Proper installation and anchorage of
the pumps and accessories are crucial to limit vibrations and
achieve reliable installation:
• The foundation and concrete must 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 minimum 3-5
times heavier than the weight of the supported equipment and
must have sufficient rigidity to withstand the axial, transverse,
and torsional loads generated by the pump.
• The foundation must be 5.9 in (15 cm) wider than the baseplate
for pumps up to 469 hp (350 kW) and 9.8 in (25 cm) wider for
larger pumps.
• The concrete used in the foundation must have a minimum
2
tensile strength of 362 lbf/in
• Always use epoxy grout to fasten the baseplate to the
foundation.
Pumps with A100 or A120 (DN 250 or DN 300) flanges
must be installed on a concrete foundation. See the figure
below.
Dry, vertical installation on vertical base stand (left) and on
concrete foundation (right)
2
(250 N/cm ).

6.2 Mounting the product

Installation
Description
type
Sewage pump without
cooling jacket for
S
vertical, submerged
installation
Sewage pump with
cooling jacket for
C
vertical, submerged
installation
Sewage pump with
D cooling jacket for
vertical, dry installation
Sewage pump with
cooling jacket for
H
horizontal, dry
installation
6.3 Permanent, vertical, submerged installation on auto
coupling
Pumps for permanent, vertical installation in a pit can be installed
on a stationary auto coupling and operated completely or partially
submerged in the pumped liquid.
Make sure that the pipes are installed without the use of
undue force. No loads from the weight of the pipes must
be carried by the pump. Use loose flanges to ease the
installation and to avoid pipe tension at the flanges.
Do not use elastic elements or bellows to connect the
pipes.
In some installations, a plinth is required beneath the auto
coupling to ensure correct installation of the pump.
Consider this during the design of the installation.
The guide rails must not have any axial play as this may
cause noise during operation.
Proceed as follows:
1. Drill mounting holes for the guide-rail bracket on the inside of
the pit and fasten it provisionally with two screws.
2. Place the auto-coupling base unit on the bottom of the pit. If the
bottom is uneven, the auto-coupling base unit must be
supported. Use a plumb line to establish the correct positioning.
Fasten the auto coupling with expansion bolts.
3. Connect the outlet pipe in accordance with the generally
accepted procedures. Avoid exposing the pipe to distortion or
tension.
4. Place the guide rails on the auto-coupling base unit and adjust
the length of the rails to the guide-rail bracket at the top of the
pit.
5. Unscrew the provisionally fastened guide-rail bracket. Insert the
expansion dowels into the holes. Fasten the guide-rail bracket
on the inside of the pit. Tighten the screws in the expansion
dowels.
6. Clean out debris before lowering the pump into the pit.
7. Fit the guide shoe to the pump.
8. Slide the guide shoe along the guide rails and lower the pump
into the pit by a chain secured to the lifting bracket (fig.
Lowering the pump between the guide rails). When the pump
reaches the auto-coupling base unit, pull the lifting chain
Installation and
accessories
Permanent installation on
auto coupling
Temporary installation on
ring stand
Permanent installation on
auto coupling
Temporary installation on
ring stand
Permanent installation on
base stand
Permanent installation on
baseplate
Permanent installation on
base stand for horizontal
installation.
11