Installation and electrical connection
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Installation and operating instructions Wilo NL-HE
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NOTICE
Three-phase motors are equipped with a thermistor depending on the manufacturer.
• Observe the wiring information in the terminal box.
• Observe the documentation from the manufacturer.
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Establish an electrical connection via a stationary mains connection cable.
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In order to ensure drip protection and strain relief on the cable connections, only cables
with a suitable outer diameter may be used and the cable feedthroughs must be firmly
screwed.
Cables must be installed with a drip loop to avoid accumulation of water.
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Unused cable feedthroughs should be sealed with the sealing plates provided, and
screwed tight.
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Reinstall any uninstalled safety devices, such as terminal box covers!
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Check the direction of rotation of the motor while commissioning!
6.8.1
Fuse on mains side
Circuit breaker
The size and switching characteristics of the circuit breakers must conform to the rated cur-
rent of the connected product. Observe local regulations.
Residual-current device (RCD)
Comply with the regulations of the local energy supply company! The use of a residual-cur-
rent device is recommended.
If persons come into contact with the device and conductive fluids, secure the connection
with
a residual-current device (RCD).
6.8.2
Protective devices
WARNING
Risk of burns from hot surfaces!
The spiral housing and the discharge cover assume the temperature of the fluid during
operation. It may cause burns.
• Depending on the application, insulate the spiral housing.
• Provide corresponding guards.
•
Allow the pump to cool down at ambient temperature after switching it off!
• Observe local regulations.
CAUTION
Risk of property damage due to incorrect insulation!
The discharge cover and the bearing bracket must not be insulated.
