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Verfügbare Sprachen
Verfügbare Sprachen
4.2
Monitoring devices
4.3
Operating modes
4.4
Operation with frequency con-
verter
Installation and operating instructions Wilo Motor HC 20.1 + EMU FA, Rexa SUPRA, Rexa SOLID
Product description
– Static: NBR (nitrile)
The precise details of the materials are shown in the respective configuration.
Overview of possible monitoring devices:
Internal monitoring devices
Terminal room/motor compartment
Motor winding
Motor bearings
Sealing chamber
Leakage chamber
Vibration sensor
External monitoring devices
Sealing chamber
Key: − = not available/possible, o = optional, • = as standard
All the monitoring devices fitted must always be connected!
Monitoring the terminal room and motor compartment
The terminal room and motor compartment monitoring protects the motor terminals
and winding from short-circuits. An electrode in both the terminal room and the motor
compartment measures the moisture content.
Monitoring of motor winding
The thermal motor monitoring protects the motor winding from overheating. Temper-
ature limiting with PTC sensor is fitted.
External monitoring of the sealing chamber
The sealing chamber can be equipped with an external pencil electrode. The electrode
registers fluid ingress through the mechanical seal on the fluid side. An alarm or deac-
tivation of the pump can therefore take place by pump control.
Leakage chamber monitoring
The leakage chamber is equipped with a float switch. The float switch registers fluid in-
gress through the mechanical seal on the motor side. An alarm or deactivation of the
pump can therefore take place by pump control.
Monitoring of motor bearing
The thermal monitoring of the motor bearing protects the roller bearings against over-
heating. Pt100 sensors are used for temperature measurement.
Operating mode S1: Continuous duty
The pump can operate continuously at the rated load without exceeding the permiss-
ible temperature.
Operating mode: Non-immersed operation
The "non-immersed operation" operating mode describes the possibility of the motor
emerging during the drainage pumping sequence. This allows a further lowering of the
water level as far as the upper edge of the hydraulics. Observe the following points dur-
ing non-immersed operation:
▪ Operating mode: Continuous duty (S1).
▪ Max. fluid and ambient temperature: The max. ambient temperature corresponds to the
max. fluid temperature shown on the rating plate.
Operation on the frequency converter is permitted. Refer to the appendix for the relev-
ant requirements!
HC 20.1
HC 20.1 ...-E3
•
•
•
•
o
o
−
−
•
•
−
−
o
o
en
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