Mechanical Installation; Installing The Pump; Positioning; Control Box Positions - Grundfos MAGNA3 Montage- Und Betriebsanleitung

3. Mechanical installation

3.1 Installing the pump

The MAGNA3 is designed for indoor installation.
The pump must be installed in such a way that it is not stressed
by the pipework.
The pump may be suspended direct in the pipes, provided that
the pipework can support the pump.
Twin-head pumps are prepared for installation on a mounting
bracket or base plate.
To ensure adequate cooling of motor and electronics, the
following must be observed:
• Position the pump in such a way that sufficient cooling is
ensured.
• The temperature of the ambient air must not exceed +40 °C.
Warning
Observe local regulations setting limits for
manual lifting or handling.
Step Action
Arrows on the pump housing
indicate the liquid flow direction
through the pump. The liquid
1
flow direction can be horizontal
or vertical, depending on the
control box position.
Close the isolating valves and
make sure that the system is not
2
pressurised during the
installation of the pump.
Mount the pump with gaskets in
3
the pipework.
Fit bolts and nuts. Use the right
4 size of bolts according to system
pressure.
14

3.2 Positioning

Always install the pump with horizontal motor shaft.
• Pump installed correctly in a vertical pipe. See fig. 7, pos. A.
• Pump installed correctly in a horizontal pipe. See fig. 7, pos. B.
• Do not install the pump with vertical motor shaft. See fig. 7,
pos. C and D.
A
C
Fig. 7

3.3 Control box positions

Illustration
To ensure adequate cooling, the control box must be in horizontal
position with the Grundfos logo in vertical position. See fig. 8.
Fig. 8
B
D
Pump installed with horizontal motor shaft
Pump with control box in horizontal position