Wilo Yonos MAXO Instrucciones De Instalación Y Funcionamiento página 61

DANGER
Risk of fatal injury from magnetic field!
When dismantled, the permanent magnet rotor inside the pump can pose a risk of fatal injury
for people with medical implants (e.g. pacemakers).
• Never remove the rotor.
– If the unit consisting of impeller, bearing plate and rotor is pulled out of the motor, per-
sons with medical aids, such as cardiac pacemakers, insulin pumps, hearing aids, im-
plants or similar are at risk. Death, severe injury and damage to property may be the re-
sult. For such persons, a professional medical assessment is always necessary.
• There is a crushing hazard! When removing the rotor from the motor, it can be pulled back
into its original position by the strong magnetic field.
– If the rotor is outside the motor, magnetic objects may be attracted very suddenly. This
can result in injury and damage to property.
• Electronic devices may be impaired functionally or damaged by the strong magnetic field
of the rotor.
When assembled, the rotor's magnetic field is guided in the motor's iron core. However, there is no magnetic
field outside the machine that is harmful to health or has a negative impact.
9.2.1 Dismantling/installation of the motor
Take into account the "Shutdown" chapter before dismantling/installing the motor!
• Close the existing shut-off valves in front of and behind the pump!
• If no shut-off valves are fitted, drain the system!
Dismantling the motor
1. Loosen motor fastening screws and remove the motor from the centring on the pump housing.
CAUTION
Damage to property!
If the motor head is separated from the pump housing during maintenance or repair work:
• Replace O-ring between motor head and pump housing!
• Mount the O-ring, untwisted, in the angled end of the bearing plate that faces the im-
peller!
• Ensure correct position of the O-ring!
• Perform leakage test for maximum permissible operating pressure!
Installing the motor
The motor is installed in reverse order of dismantling.
1. Insert the motor into the centring of the pump housing and insert the four motor fastening screws into
the threaded holes.
2. Tighten motor fastening screws diagonally. Observe tightening torques! (see table "Tightening torques
for motor fastening screws" [} 53]).
For commissioning of the pump, see the "Commissioning" chapter.
Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08
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