Maintaining The Product; Maintenance Schedule; Maintenance Interval - Grundfos DMX 221 Instrucciones De Instalación Y Funcionamiento

7. Maintaining the product

7.1 Maintenance schedule

Maintenance interval

Monthly
Monthly
With a counterpressure up to 10 bar
•
•
•
With a counterpressure of 10 to 16 bar
•
•
•
•
•
•
In case of fault
Every 5 years or every 20,000 operating
hours
Related information
• 7.3 Preparing for maintenance of the dosing diaphragm or the valves
• 7.4 Cleaning or replacing the inlet and outlet valves
• 7.5 Cleaning or replacing the dosing diaphragm
• 7.6 Cleaning or replacing the diaphragm of the integral relief valve
• 11.1.5 Maintaining the diaphragm leakage sensor
• 7.7 Returning the product
every 12 months
every 4000 operating hours
in case of fault.
every 6 months
every 2000 operating hours
in case of fault.
every 12 months
every 8000 operating hours
in case of fault.
Task
Check that dosing medium is not leaking out of the
pump.
Clean the product with a soft cloth and pay special
attention to the fan cover.
Clean or replace the dosing diaphragm, inlet valve
and outlet valve.
Clean or replace the dosing diaphragm, inlet valve
and outlet valve.
Clean or replace the diaphragm of the integral re-
lief valve.
Check the diaphragm leakage sensor.
Have the gear grease changed.
Only qualified persons authorised by
Grundfos are allowed to change the gear
grease. Send the pump to Grundfos or an
authorised service workshop.
DMX 221 | | 30