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8.10.4 Maintenance of strainer (11)
Read section:
8.10.1 Safety
instructions.
1. Stop the system by pressing the [Stop] button on the HMI.
Warning
Danger from running system!
Make sure, that the Grundfos Eye has stopped
rotating before starting any work on the system
components or lines!
2. Put on chemically resistant gloves and tight-fitting protective
goggles.
3. Prepare a bucket with a 0.05 % sodium hypochlorite solution.
See section:
8.6.2 Sodium hypochlorite
The following steps refer to fig.: 7.
4. Close manual valves (64) and (67).
5. Place an empty bucket underneath manual valve (2).
6. Open manual valve (2) to drain strainer (11) until the water
level in the strainer reaches the lower union nut.
– If necessary, slightly open manual valve (58) until the
strainer is drained.
– The strainer body is transparent, so the water level can be
checked visually during draining.
– Do not drain too much water to avoid draining the feed
pump. A drained feed pump requires the whole system to be
deaerated by certified service staff.
The following steps refer to fig.: 18.
7. Unscrew lock nut (11.7) and remove it together with inner
strainer parts (11.2), (11.3), (11.4), (11.5), (11.6).
8. Remove retaining ring (11.6).
9. Remove screen (11.2).
10. Remove split ring (11.8) carefully, as it can easily break.
11. Remove lock nut (11.7) from bonnet (11.3).
12. If body (11.1) is dirty, open both union nuts (11.11) and
remove the body from the system to clean it.
– Be careful not to loose or damage the seal rings (11.9).
13. Clean all parts of the strainer thoroughly. See section:
8.6 Cleaning
agents.
– To remove organics, use a brush and a 0.05 % sodium
hypochlorite solution.
– To remove scaling, use household vinegar or citric acid.
– If screen (11.2) is damaged, replace it by a new one.
14. Check the O-ring (11.5) at bonnet (11.3) for wear or damage.
Replace it, if necessary.
15. Reassemble the strainer and reinstall it into the system in
reversed order.
16. To restart the system, press the [Start] button on the HMI.
8.10.5 Maintenance of strainer (27)
Read section:
1. Stop the system by pressing the [Stop] button on the HMI.
2. Put on chemically resistant gloves and tight-fitting protective
3. Prepare a bucket with a 0.05 % sodium hypochlorite solution.
solution.
The following steps refer to fig.: 7.
4. Close manual valve (64).
5. Place an empty bucket underneath strainer (27).
6. Cover all electrical components around and below the working
The following steps refer to fig.: 18.
7. Unscrew lock nut (11.7) and remove it together with inner
8. Remove retaining ring (11.6).
9. Remove screen (11.2).
10. Remove split ring (11.8) carefully, as it can easily break.
11. Remove lock nut (11.7) from bonnet (11.3).
12. If body (11.1) is dirty, open both union nuts (11.11) and
13. Clean all parts of the strainer thoroughly. See section:
14. Check the O-ring (11.5) at bonnet (11.3) for wear or damage.
15. Reassemble the strainer and reinstall it into the system in
16. To restart the system press the [Start] button on the HMI.
8.10.1 Safety
instructions.
Warning
Danger from running system!
Make sure, that the Grundfos Eye has stopped
rotating before starting any work on the system
components or lines!
goggles.
See section:
8.6.2 Sodium hypochlorite
area with water-tight foil, so that no water can ingress and
damage those components.
strainer parts (11.2), (11.3), (11.4), (11.5), (11.6).
remove the body from the system to clean it.
– Be careful not to loose or damage the seal rings (11.9).
8.6 Cleaning
agents.
– To remove organics, use a brush and a 0.05 % sodium
hypochlorite solution.
– To remove scaling, use household vinegar or citric acid.
– If screen (11.2) is damaged, replace it by a new one.
Replace it, if necessary.
reversed order.
solution.
37
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