Grundfos CR Instructions D'installation Et D'utilisation page 7

The foundation length and width must always be 200
mm larger than the length and width of the pump.
See fig. 4.
Fig. 4 Foundation, horizontal mounting
The mass of the foundation must be at least 1.5
times the total mass of the pump. The minimum
height of the foundation (hf) can then be calculated:
Mpump × 1.5
hf =
Lf × Bf × δconcrete
The density (δ) of concrete is usually taken as 2200
3
kg/m .
In installations where noise-less operation is
particularly important, we recommend that you use a
foundation with a mass up to 5 times that of the
pump.
The foundation must be provided with anchor bolts
for fixing the base plate. See fig. 5.
Fig. 5 Bolt in foundation
When the anchor bolts are in position, place the
pump on the foundation. Then align the base plate
using shims, if necessary, so that it is completely
horizontal. See fig. 6.
Fig. 6 Alignment with shims
3.1.4 Vibration dampening
Elimination of noise and vibrations is best achieved
by means of a concrete foundation, vibration
dampers and expansion joints.
If you use vibration dampers, install them under the
foundation. For pumps with motor size below or
equal to 30 kW, you can use vibration dampers as
shown in fig. 7.
For pumps with motor sizes equal to 37 kW or above,
®
use a Sylomer plate as shown in fig. 8.
Vibration dampers
Fig. 7 Pump on vibration dampers
Shims
7