Manual
GWP3  PEREL 
4
operation is not guaranteed if the gap is too small. 
•  When you set the float switch, make sure that it does not touch the base before the pump switches off. Caution: 
risk of dry-running. 
Maintenance Guidelines 
This submersible pump is an approved high-quality product which is subject to severe final controls. We recommend 
regular inspection and maintenance to ensure long equipment life and uninterrupted operation. 
•  Remove the mains plug before all maintenance work. 
•  In the event that the pump is often transported in the course of operation, it should be cleaned out with clear water 
after every use. 
•  In case of stationary installation, the function of the floating switch should be checked every 3 months. 
•  All fibrous particles which may have built up inside the pump housing should be removed with a water jet. 
•  Remove deposits on the floater with clear water. 
Cleaning the impeller 
If excessive deposits collect in the pump case you must dismantle the bottom part of the pump as follows: 
•  Remove the intake cage from the pump case. 
•  Clean the impeller with clear water. 
Important! Do not put down or rest the pump on the impeller! 
•  Assemble in reverse order. 
Troubleshooting 
Problem  Possible Cause  Suggested Solution 
Pump does not start  - No mains supply 
- Floater does not switch 
- Check mains supply 
- Bring floater in a higher position 
No flow  - Inlet sieve is clogged 
- Pressure hose is bent 
- Clean inlet sieve water jet 
- Reset hose 
Pump does not switch off  - Floater cannot sink down  - Place pump properly on shaft 
ground 
Insufficient flow  - Inlet sieve is clogged 
- Reduced pumping capacity by dirty 
and abrasive water 
- Clean inlet sieve 
- Clean pump and replace worn out 
parts 
Pump switches off after short 
operating period 
- Thermal cut-out stops pump due to 
dirty water 
- Water is too hot; thermal cut-out 
stops pump 
- Remove mains plug, clean pump 
and shaft 
- Make sure the water temperature 
of 35°C is not exceeded 
Technical Specifications 
Power Supply  max. 230VAC / 50Hz 
Power Consumption  max. 750W 
Max. Flow Rate  13000l/h 
Max. Height  9m 
Max. Grain Size  35mm 
Power Cord  3 G1.5, 10m 
IP Rating  IP68 
Use this device with original accessories only. Velleman nv cannot be held responsible in the event of 
damage or injury resulted from (incorrect) use of this device. For more info concerning this product, please 
visit our website www.perel.eu. The information in this manual is subject to change without prior notice. 










