Installation; Mechanical Installation - Grundfos Hydro Multi-B Series Installation And Operating Instructions Manual

6. Installation

Warning
Installation and operation must comply with local
regulations and accepted codes of good practice.
Before installation, check the following:
• Does the booster system correspond to order?
• Are all visible parts intact?

6.1 Mechanical installation

6.1.1 Location
The booster system must be installed in a well ventilated room to
ensure sufficient cooling of the pumps and the control cabinet.
The booster system is not designed for outdoor
Caution
installation and must not be exposed to direct
sunlight.
The booster system must have a 3 ft (1 m)
Note
Note
clearance on all sides for inspection and
dismantling.
6.1.2 Pipework
The pipework connected to the booster system
Note
Note
must be of adequate size.
Fig. 6 Example showing the position of expansion joints, pipe
supports and mounting bolts
Pos. Description
1 Expansion joint
2 Pipe support (and good location for isolating valve)
3 Mounting bolts
Expansion joints, pipe supports and mounting
Note
Note
bolts shown in fig.
a standard booster system.
6 above are not supplied with
Connect the pipes to the manifolds of the booster system. Either
end can be used. Apply sealing compound to the unused end of
the manifold, and fit the screw cap. For manifolds with flanges,
fit a blanking flange with gasket.
It is advisable to install pipe supports for the suction and
discharge pipes. See fig. 6.
To achieve optimum operation and minimize noise and vibration,
it may be necessary to consider vibration dampening of the
booster system.
Noise and vibration are generated by the rotations in the motor
and pump and by the flow in pipework and fittings. The effect on
the environment is subjective and depends on correct installation
and the state of the other parts of the system.
If booster systems are installed in a building where the first user
on the line is close to the booster system, it is advisable to fit
expansion joints on the suction and discharge pipes to prevent
vibration being transmitted through the pipework. All nuts should
be re-tightened prior to start-up.
The pipes must be fastened to parts of the building to ensure that
they cannot move or be twisted.
6.1.3 Foundation
The booster system should be positioned on an even and solid
surface, for instance a concrete floor or foundation. The booster
system must be bolted to the floor or foundation.
As a rule of thumb, the weight of a concrete
Note
Note
foundation should be 1.5 x the weight of the
booster system.
6.1.4 Vibration dampers
To prevent the transmission of vibrations to buildings, it may be
necessary to isolate the booster system foundation from building
parts by means of vibration dampers.
Which is the right damper varies from installation to installation,
and a wrong damper may increase the vibration level. Vibration
dampers should therefore be sized by the supplier of vibration
dampers. If the booster system is installed on a base frame with
vibration dampers, expansion joints should always be fitted on
the manifolds. This is important to prevent the booster system
from "hanging" in the pipework.
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