Name: Grundfos MAGNA1 Series
Brand: Grundfos
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English (GB)

3.3 Positioning

Always install the pump with horizontal motor shaft.

• Pump installed correctly in a vertical pipe. See fig. 10, pos. A.

• Pump installed correctly in a horizontal pipe. See fig. 10,

pos. B.

• Do not install the pump with vertical motor shaft. See fig. 10,

pos. C and D.

Fig. 10 Pump installed with horizontal motor shaft

3.4 Control box positions

To ensure adequate cooling, the control box must be in horizontal

position with the Grundfos logo in vertical position. See fig. 11.

Fig. 11 Pump with control box in horizontal position

If the pump head is removed before the pump is installed in the

pipework, pay special attention when fitting the pump head to the

pump housing:

1. Gently lower the pump head with rotor shaft and impeller into

the pump housing.

2. Make sure that the contact face of the pump housing and that

of the pump head are in contact before the clamp is tighened.

See fig. 12.

Fig. 12 Fitting the pump head to the pump housing

Fig. 13 Automatic air vent

TM05 5518 3812

TM05 5519 3812

TM05 5520 3812

TM05 5521 3812

TM05 5522 3812

TM05 5837 4112

Caution

Twin-head pumps installed in horizontal pipes

must be fitted with an automatic air vent (Rp 1/4)

in the upper part of the pump housing.

See fig. 13.

TM05 6062 4412

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