Instruction
Membrane cleaning of the RO-system with iSave unit
3
180R9214 / 521B1165 / DKCFN.PI.003.G2.02 / 03.2011
Starting up the system
P&ID no. 1
7. Feed the cleaning solution at high flow into the “full flow cleaning” adapter (7). The high flow rate
flushes out the foulants removed from the membrane surface by the cleaning.
8. Flush RO permeate or deionised water into the “full flow cleaning” adapter (7).
Flush out the cleaning solution.
It is essential that the water used for the final pre-flush is pre-filtered to a level described in the
datasheet.
9. Open valve (9) and flush trough the iSave. The iSave may start to rotate backward – this is OK.
10. When flushing is finalised – assure that no foulants remain in the piping or valve (9).
11. Close the high pressure “full flow cleaning” valve (7) and close valve (16).
Below procedure is according P&ID no 2.
1. Stop the high-pressure pump (4), and stop the iSave (11).
2. Stop the seawater supply pump (1).
3. Disconnect pipe in joint (9) and connect the pipe to low pressure “Full flow cleaning” joint (16).
4. Plug pipe in joint (9).
5. Open valve (16)
6. Pump mixed cleaning solutions to the vessel at conditions of low flow rate and low pressure to
displace the process water. Use only enough pressure to compensate for the pressure drop from
feed to concentrate. The pressure should be low enough that essentially no or little permeate is
produced. A low pressure minimizes re-deposition of dirt on the membrane. Dump the brine/
concentrate to prevent dilution of the cleaning solution.
7. Recycle: After the process water is displaced, cleaning solution will be present in the concentrate
stream. Recycle the cleaning solution from the piping to the cleaning solution tank.
8. Turn of the pump and allow the elements to soak.
9. Feed the cleaning solution at high flow into the “full flow cleaning” adapter (7) on the feed side of
the membrane. The high flow rate flushes out the foulants removed from the membrane surface by
the cleaning.
Summary of Contents for iSave 21
Page 5: ...User manual iSave 21 5 180R9221 521B1174 DKCFN PS 003 A1 02 1 CE Declaration of conformity...
Page 32: ...User manual iSave 21 32 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 38: ...User manual iSave 21 38 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 43: ...User manual iSave 21 43 180R9221 521B1174 DKCFN PS 003 A1 02 10 3 Data sheet...
Page 44: ...User manual iSave 21 44 180R9221 521B1174 DKCFN PS 003 A1 02...
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Page 59: ...User manual iSave 21 59 180R9221 521B1174 DKCFN PS 003 A1 02 10 4 iSave part list...
Page 60: ...User manual iSave 21 60 180R9221 521B1174 DKCFN PS 003 A1 02...
Page 61: ...isave danfoss com iSave 21 Parts list 180R9209 DKCFN PC 003 A2 02 Parts list...
Page 66: ...Parts list iSave 21 Parts list 6 180R9209 DKCFN PC 003 A2 02 03 2011 Exploded view Vane pump...
Page 68: ...Parts list iSave 21 Parts list 8 180R9209 DKCFN PC 003 A2 02 03 2011 Exploded view iSave...
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Page 71: ...User manual iSave 21 71 180R9221 521B1174 DKCFN PS 003 A1 02 10 5 iSave overload protection...
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