Wilo HC 20.1 E3 Series - Monitoring Devices; Operating Modes

en Product description
12 WILO SE 2019-01
ƒ Pump housing: EN-GJL-250 (ASTMA48 Class35/40B)
ƒ Impeller: EN-GJL-250 (ASTMA48 Class35/40B)
ƒ Motor housing: EN-GJL-250 (ASTMA48 Class35/40B)
ƒ Seal:
– Motor side:
• Version “G”: Carbon/Ceramic
• Version “K”: SiC/SiC
– Fluid side: SiC/SiC
– Static: NBR (nitrile)
The precise details of the materials are shown in the respective configuration.
4.2 Monitoring devices
Overview of possible monitoring devices:
HC 20.1 HC 20.1 ...-E3
Internal monitoring devices
Terminal room/motor compartment
• •
Motor winding
• •
Motor bearings
o o
Sealing chamber
− −
Leakage chamber
• •
Vibration sensor
− −
External monitoring devices
Sealing chamber
o o
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.
4.3 Operating modes
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: