Electrical Installation - Grundfos MAGNA3 65-XX Notice D'installation Et De Fonctionnement

Step Action
Single-head pump.
Note: The gap of the clamp can
also be in position 6 o'clock for the
following pump sizes:
4b
• MAGNA3 65-XX
• MAGNA3 80-XX
• MAGNA3 100-XX.
Twin-head pump.
Position the clamps so that the
4c gaps point towards the arrows.
They can be in position 3 or
9 o'clock.
Twin-head pump.
Note: The gap of the clamp can
also be in position 6 o'clock for the
following pump sizes:
4d
• MAGNA3 65-XX
• MAGNA3 80-XX
• MAGNA3 100-XX.
Fit and tighten the screw holding
6 the clamp to minimum
6 ± 0.7 ft-lbs (8 ± 1 Nm).
Fit the insulating shells.
Note: For air conditioning and
cooling systems a silicone sealant
must be applied inside the
insulation shell to eliminate all air
gaps and prevent condensation
7
between the pump housing and
insulation shell. Alternatively, the
pump may be insulated manually
in accordance with standard
insulation practices for cooling
applications.
If insulating the pump manually, do not insulate
Caution
the control box or cover the control panel.
Fig. 13 Insulation of pump housing and pipework
12

5. Electrical installation

Illustration
Carry out the electrical connection and protection according to
local regulations.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
• If rigid conduit is to be used, the hub must be connected to the
conduit system before it is connected to the terminal box of the
pump.
• The pump must be connected to an external mains switch.
• The pump requires no external motor protection.
• The motor incorporates thermal protection against slow
overloading and blocking.
• When switched on via the power supply, the pump will start
pumping after approx. 5 seconds.
Note
Note
Warning
Never make any connections in the pump control
box unless the power supply has been switched
off for at least 5 minutes.
Warning
The pump must be connected to an external
mains switch with a contact separation of at least
1/8 inch (3 mm) in each pole.
The ground terminal of the pump must be
connected to ground. Grounding or
neutralization can be used for protection against
indirect contact.
If the pump is connected to an electric
installation where a Ground Fault Circuit
Interrupter (GFCI) is used as additional
protection, this circuit interrupter must trip out
when ground fault currents with DC content
(pulsating DC) occur.
The number of starts and stops via the power
supply must not exceed four times per hour.