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Final check
8
Electrical connection
66
NOTICE
Avoid flow cavitation!
• A settling section must be provided upstream and downstream of the
pump in the form of a straight pipe. The length of the settling section
must be at least 5 times the nominal diameter of the pump flange.
•
Remove the flange covers at the suction and discharge ports of the pump before attach-
ing the piping.
Check the alignment of the unit again according to the "Installation" section.
•
Tighten the foundation bolts if necessary.
•
Check all connections for correctness and function.
•
It must be possible to turn the coupling/shaft by hand.
Do not allow the coupling/shaft to turn:
•
Release the coupling and re-tighten with the prescribed torque.
In case this measure is not successful:
•
Remove the motor (see "Changing the motor" section).
•
Clean the motor centring and flange.
•
Reinstall the motor.
DANGER
Risk of fatal injury due to electrical current!
The use of a thermal overload protection is recommended!
Improper conduct when carrying out electrical work can lead to death
due to electric shock!
• Electrical connection may only be carried out by a qualified electrician
and in accordance with the applicable regulations!
• Adhere to accident prevention regulations!
• Before beginning work on the product, make sure that the pump and
drive are electrically isolated.
• Make sure that no one can turn on the power supply again before
work is completed.
• Electrical machines must always be earthed. Earthing must be appro-
priate for the drive and meet the relevant standards and regulations.
Earth terminals and fixation elements must be suitably dimensioned.
• Observe the installation and operating instructions for the accessor-
ies!
DANGER
Danger of death due to contact voltage!
Touching live parts will result in serious injuries or death!
Even when it is disconnected, high contact voltages can still occur in the
terminal box due to non-discharged capacitors. Therefore, work on the
terminal box module must not be started until 5 minutes have elapsed!
• Disconnect all poles of the supply voltage and secure against recon-
nection!
• Check whether all connections (including potential-free contacts) are
voltage-free!
• Never insert objects (e.g. nail, screwdriver, wire) into openings on the
terminal box!
• Reinstall removed safety devices (such as terminal box cover)!
Installation and operating instructions • Wilo-Atmos GIGA-I/-D/-B • Ed.01/2023-08
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