Taking The Product Out Of Operation - Grundfos DMX 221 Installations- Und Bedienungsanleitung

6. Taking the product out of operation

1. Flush the dosing head with water, if possible.
2. Stop dosing:
3. Close the vent plug.
4. Depressurise the pressure side of the dosing system.
5. Close the isolating valves on the inlet side and outlet side, if installed.
6. Make sure no dosing medium can flow back from the outlet side.
7. Make sure the returning dosing medium is safely collected.
8. Disconnect the inlet line and the outlet line.
9. Disconnect the pump electrically.
WARNING
Chemical hazard
Death or serious personal injury
● Observe the material safety data sheet of the dosing medium.
● Wear protective clothing when working on the dosing head, connections or
lines.
● Before relieving the pressure from the outlet side, make sure escaping dosing
medium cannot cause any harm to persons or equipment.
● Collect and dispose of all chemicals in a way that is not harmful to persons or
the environment.
DANGER
Electric shock
Death or serious personal injury
● Electrical disconnection must be carried out by qualified persons.
● Do not open the pump housing.
● Switch off the power supply before making any electrical connections.
Close the vent plug when taking the pump out of operation for transport, storage
or service.
• For pumps with AR control unit, press the start/stop button on the AR control unit and
switch off the power supply to the pump.
• For pumps without AR control unit, switch off the power supply to the pump.
• For pumps with a mains plug, remove the mains plug from the power socket.
• For pumps without mains plug, proceed as follows:
a. Open the terminal box on the motor.
b. Disconnect the motor.
c. Close the terminal box on the motor.
The pump is now ready for storage or transport.
DMX 221 | Taking the product out of operation | 29