Operation; Minimum Flow Rate; Pumped Liquids; Frequency Of Starts And Stops - Grundfos SP Serie Instrucciones De Instalación Y Operación

8. Operation

Check the pump and system periodically for
water quantity, pressure, drawdown, periods of
cycling and operation of controls.
If the pump fails to operate, or there is a loss of
performance, refer to section
9. Troubleshooting.

8.1 Minimum flow rate

To ensure the necessary cooling of the motor, do
not set the pump flow rate so low that the
cooling requirements specified in section

6.2.2 Pumped liquids

cannot be met.

8.1.1 Frequency of starts and stops

Motor type
MS 402
MS 4000
MS 6000C
PVC windings
MMS6
PE/PA windings
PVC windings
MMS 8000
PE/PA windings
PVC windings
MMS 10000
PE/PA windings
24
Number of starts
• Minimum 1 per year is recommended.
• Maximum 100 per hour.
• Maximum 300 per day.
• Minimum 1 per year is recommended.
• Maximum 100 per hour.
• Maximum 300 per day.
• Minimum 1 per year is recommended.
• Maximum 30 per hour.
• Maximum 300 per day.
• Minimum 1 per year is recommended.
• Maximum 3 per hour.
• Maximum 40 per day.
• Minimum 1 per year is recommended.
• Maximum 10 per hour.
• Maximum 70 per day.
• Minimum 1 per year is recommended.
• Maximum 3 per hour.
• Maximum 30 per day.
• Minimum 1 per year is recommended.
• Maximum 8 per hour.
• Maximum 60 per day.
• Minimum 1 per year is recommended.
• Maximum 2 per hour.
• Maximum 20 per day.
• Minimum 1 per year is recommended.
• Maximum 6 per hour.
• Maximum 50 per day.