Control Box Positions; Pump Head Position - Grundfos MAGNA3 D Instrucciones De Instalación Y Operación

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4.6 Control box positions

To ensure adequate cooling, make sure that the control box is in
horizontal position with the Grundfos logo in vertical position. See
fig. 7.
Pump with the control box in horizontal position
Fig. 7
Twin-head pumps installed in horizontal pipes can
be fitted with an automatic vent, Rp 1/4" thread, in
the upper part of the pump housing if no venting
valve is installed in the system. See fig. 8.
Automatic vent
Fig. 8
10

4.7 Pump head position

If you remove the pump head before installing the pump in the
pipes, pay special attention when fitting the pump head to the
pump housing:
1. Visually check that the floating ring in the sealing system is
centered. See figures 9 and 10.
2. Gently lower the pump head with rotor shaft and impeller into
the pump housing.
3. Make sure that the contact face of the pump housing and that
of the pump head are in contact before you tighten the clamp.
See fig. 11.
Correctly centered sealing system
Fig. 9
Fig. 10 Incorrectly centered sealing system
Observe the position of the clamp before you
tighten it. Incorrect position of the clamp will cause
leakage from the pump and damage the hydraulic
parts in the pump head. See fig. 11.

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