Maintenance; Safety Instructions; Warning; Maintenance Intervals - Grundfos DDA Instrucciones De Instalación

10. Maintenance

10.1 Safety instructions

Warning

Cleaning and maintenance must only be carried out
by authorized and qualified staff.
Wear the stipulated personal protective equipment
(protective clothing, goggles, respirator etc.) when
handling chemicals.
Observe the chemicals manufacturer's safety data
sheets and safety instructions of the chemicals used.
Warning
Shut down the entire installation before starting any
work on the system components and lines.
Before starting maintenance work, disconnect the
DSS system from the power supply.
Before starting maintenance work, depressurize the
outlet line.
Drain and flush dosing head, valves and pipes.
Warning
Safety devices, which have been deactivated during
maintenance, must be activated again immediately
after maintenance.
Note
Note
Store important spare parts close to the DSS system.

10.2 Maintenance intervals

10.2.1 Daily checks
• Inspect the tightness visually.
10.2.2 Regular checks
Carry out regular checks weekly or monthly, depending on the
type of dosing pump and dosing medium. See the installation and
operating instructions of the dosing pump and characteristic of
the dosing medium.
• Check the dosing performance.
• Check the strainer
– clean the strainer, if necessary.
• Maintain the dosing pump
– see installation and operating instructions of the dosing
pump.
• Maintain the back pressure and pressure relief valve
– see installation and operating instructions of the back
pressure and pressure relief valve.
• Check all accessories such as pulsation dampeners and level
switches to ensure they are functioning properly.

10.2.3 Annual checks

• Check the entire installation
– replace gaskets, O-rings, diaphragms and other wear parts,
if necessary.
After maintenance, check the proper functioning and
Note
Note
tightness of the entire installation.
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11. Long-term shutdown

Warning
Some chemicals react with water, which can lead to
explosions. If the dosing medium can react with
water, the DSS system must be flushed with a
medium compatible with the dosing medium.
1. Flush the dosing tank, lines, pipes, connections and pumps.
– The flushing can be done with water if the dosing medium is
compatible with water.
– In case of danger of frost, remove remaining medium from
tanks, lines and connections with compressed air.
2. Disconnect the DSS system from the power supply.

12. 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.