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Installation and operating instructions • Drive for Wilo-Helix2.0-VE / Wilo-Medana CH3-LE • Ed.01/2022-06
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CAUTION
Potentially fatal injury due to electronic module not being in-
stalled!
A life-threatening voltage may be present at the motor contacts! Normal
operation of the pump is only permitted with the electronic module in-
stalled.
Never connect or operate the pump without the electronic module
mounted!
CAUTION
Material damage caused by improper electrical connection! An
inadequate mains design can lead to system failures and cable
fires due to mains overload!
When designing the mains supply with regard to the used cable cross-
sections and fuses, pay special attention to the fact that, in multi-pump
operation, it is possible that all pumps operate at the same time for short
periods.
CAUTION
Danger of material damage caused by improper electrical con-
nection!
Ensure that the current type and voltage of the mains connection corres-
pond to the specifications on the pump rating plate.
Threaded cable glands and threaded cable connections
There are six cable bushings to the terminal room on the electronic module. In case of drive
is delivered with a fan, the cable for its power supply on the electronic module is mounted
at the factory. The requirements for electromagnetic compatibility must be observed.
NOTICE
Only the threaded cable gland M25 for the mains connection and M20 for
the cable of the pressure sensor are installed at the factory. All other re-
quired threaded cable glands M20 must be provided by the customer.
CAUTION
In order to ensure IP55, unoccupied threaded cable glands must remain
closed with the plugs provided by the manufacturer.
When installing the threaded cable gland, make sure that a gasket is in-
stalled below the threaded cable gland.
1.
Screw in threaded cable glands as required. Observe the tightening torque. See table
"Tightening torques".
2.
Make sure that a gasket is fitted between the threaded cable gland and the cable
bushing.
The combination of threaded cable gland and cable bushing must be made according to the
table "Cable connections":