Decommissioning; Short-Term Decommissioning (Up To 2 Weeks); Long-Term Decommissioning (More Than 2 Weeks); Disposal - Grundfos DN 10 Installation And Operating Instructions Manual

10. Decommissioning

Warning
Decommissioning must be carried out by
authorised and qualified personnel.
Before dismantling, the entire system must be
switched off.
The system must be pressureless.
Danger of gas escape!
Put on the required protective equipment.
Note If possible flush the system with nitrogen.

10.1 Short-term decommissioning (up to 2 weeks)

1. Close the connecting valves of all drums or cylinders.
2. Start the system and stop it when the variable area flowmeter
indicates no more flow.
3. Close the adjusting valve at the gas dosing unit.
4. Stop the motive water pump or close the solenoid valve.

10.2 Long-term decommissioning (more than 2 weeks)

1. Close the connecting valves of all drums or cylinders.
2. Start the system and stop it when the variable area flowmeter
indicates no more flow.
3. Close the adjusting valve at the gas dosing unit.
4. Stop the motive water pump or close the solenoid valve.
5. Close the shut-off valves of the motive water pump.
6. Close the shut-off valves upstream and downstream of the
injector.
7. Close the shut-off valve of the injection unit.
8. Remove and dismantle the header line.
9. Use warm water to clean the parts that have been in contact
with chlorine.
10. Dry all parts completely.
Seal up the connections and valves to make sure,
Caution
that no moisture can ingress!
11. Store all components of the header line.

11. Disposal

This product or parts of it must be disposed of in an
environmentally sound way. Use appropriate waste collection
services. If this is not possible, contact the nearest Grundfos
company or service workshop.
Subject to alterations.
15