Installation Examples - Grundfos SCALA Installation And Operating Instructions Manual

3.4.2 How to reduce noise in the installation
Vibrations from the pump may be transferred to the surrounding
structure and create noise in the 20-1000 Hz spectrum, also
called the bass spectrum.
Correct installation using a vibration-damping rubber pad, flexible
hoses and correctly placed pipe hangers for rigid pipes can
reduce the noise experienced by up to 50 %. See fig. 4.
Place pipe hangers for the rigid pipes close to the connection of
the flexible hose.
Pipe hanger for rigid pipe
Flexible hose
How to reduce noise in the installation
Fig. 4

3.5 Installation examples

Fittings, hoses and valves are not supplied with the pump.
3.5.1 Mains water pressure boosting
2
7
10
5
3
Mains water pressure boosting
Fig. 5
Pos. Description
1 Highest tapping point
2 Pipe hangers and supports
3 Isolating valves
4 Flexible hoses
5 Bypass valve
Optional pressure-reducing valve on the inlet side if the
6
inlet pressure can exceed 10 bar (145 psi)
Optional pressure-relief valve on the outlet side if the
7 installation cannot stand up to a pressure of 6 bar (87
psi)
Drip tray. Install the pump on a small stand to avoid the
8
ventilation holes from being flooded.
9 Pressure gauge
10 Mains water pipe
4
Rubber pad
1
3 9 4
6 2
8
3.5.2 Suction from a well
1
3
4
Suction from a well
Fig. 6
Pos. Description
1 Highest tapping point
2 Isolating valve
Inlet filter.
If the water can contain sand, gravel or other debris,
3
please install a filter on the inlet side to protect the pump
and installation.
4 Foot valve with strainer
H1 Maximum suction lift is 8 m (29 ft)
H2 Inlet pipe must be submersed at least 0.5 m (1.64 ft)
3.5.3 Suction from freshwater tank
min1
7
6
Suction from freshwater tank
Fig. 7
Pos. Description
1 Highest tapping point
2 Pipe hangers
3 Isolating valve
4 Flexible hoses
5 Drain to sewer
6 Foot valve with strainer
7 Freshwater tank
2
1
2
3 4
5