7. Maintaining the product
7.1 Maintenance schedule
Maintenance interval
Task
Monthly
Check that dosing medium is not leaking out of
the pump.
Monthly
Clean the product with a soft cloth and pay spe-
cial attention to the fan cover.
With a counterpressure up to 10 bar
•
every 12 months
•
every 4000 operating hours
•
in case of fault.
Clean or replace the dosing diaphragm, inlet
valve and outlet valve.
With a counterpressure of 10 to 16 bar
•
every 6 months
•
every 2000 operating hours
•
in case of fault.
Clean or replace the dosing diaphragm, inlet
valve and outlet valve.
•
every 12 months
•
every 8000 operating hours
•
in case of fault.
Clean or replace the diaphragm of the integral re-
lief valve.
In case of fault
Check the diaphragm leakage sensor.
Every 5 years or every 20000 operating
hours
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 work-
shop.
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
DMX 221 | |
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