Mechanical Installation - Grundfos Hydro Multi-E Montage- Und Betriebsanleitung

6. Installation
6.1 Location
Observe the following to ensure adequate cooling of motor and
electronics:
• Position the Hydro Multi-E in such a way that adequate cooling
is ensured.
• Keep motor cooling fins and fan blades clean.
The Hydro Multi-E is not suitable for outdoor installation.
The booster system must have a 1-metre clearance in front and
on the two sides.

6.2 Mechanical installation

Arrows on the pump base show the direction of flow of water
through the pump.
The pipes connected to the booster system must be of adequate
size. Fit expansion joints in the suction and discharge pipes to
avoid resonance. See fig. 4.
Connect the pipes to the manifolds of the booster system.
The manifold comes with a screw cap fitted to one end. If this end
is to be used, remove the screw cap, apply sealing compound to
the other end of the manifold, and fit the screw. Fit a blanking
flange with gasket on flanged manifolds.
Tighten up the booster system prior to start-up.
If booster systems are installed in blocks of flats or the first
consumer on the line is close to the booster system, we
recommend to fit pipe hangers on the suction and discharge
pipes to prevent vibration being transmitted through the pipework.
See fig. 4.
Position the booster system on a plane and solid surface, for
example a concrete floor or foundation. If the booster system is
not fitted with vibration dampers, it must be bolted to the floor or
foundation.
Fasten the pipes to parts of the building to ensure that they
cannot move or be twisted.
1
2
Fig. 4 Installation example with expansion joints and pipe
hangers
Pos. Description
1 Expansion joint
2 Pipe hanger
The expansion joints and pipe hangers shown in fig.
included in the standard Hydro Multi-E.
6.3 Electrical installation, Hydro Multi-E with
6.3.1 Protection against electric shock - indirect contact
2
1
Protective earth conductors must always have a yellow/green
(PE) colour marking.
2
6.3.2 Additional protection
If the Hydro Multi-E is connected to an electric installation where
an earth leakage circuit breaker (ELCB) is used as additional
protection, this circuit breaker must be marked with the following
symbol:
4 are not
The leakage current of the Hydro Multi-E can be found in section
18.2 Leakage
single-phase pumps
Fig. 5 Hydro Multi-E with single-phase CRE pumps
Fig. 6 Hydro Multi-E with single-phase CME pumps
The user or the installer is responsible for the
installation of correct earthing and protection
Note
according to local regulations. All work must be
carried out by trained personnel.
Warning
Never make any connections in the Hydro Multi-E
breaker cabinet or in the terminal box of each
individual pump unless the power supply has
been switched off for at least 5 minutes.
Warning
The Hydro Multi-E must be earthed and protected
against indirect contact in accordance with local
regulations.
ELCB
When an earth leakage circuit breaker is
selected, the total leakage current of all the
Note
electrical equipment in the installation must be
taken into account.
current.
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