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4.
Maintenance
4.1 Shutdown procedure
It is necessary to perform the shutdown procedure before effecting standstills longer than 3
months, for instance before laying up for winter.
The purpose of the shutdown is to clean the unit of possible deposits of limestone, and to inhibit
the growth of microorganisms that may reduce the reverse osmosis membrane's efficiency.
The following equipment is necessary in order to perform the shutdown operation:
1 ea. recipient 20 liters minimum capacity (a bucket of such capacity could also be suitable).
Two 16 mm. linen hoses of a length that allow them to be fed into the same container
A prepared shutdown solution SCHENKER CLEANING 1.
Tools for de-assembling hoses (screwdrivers, pliers, etc.)
The shutdown procedure is:
1.
Replace both active carbon filter and 5 microns cartridges.
2.
Collect approx. 15 liters of unchlorinated fresh water into the bucket. The water
produced by the watermaker itself could be fine.
3.
Empty the entire content of the SCHENKER CLEANING 1 solution into the picked
water, and mix carefully following the indications on the pack. Wear a protection mask
in order to avoid inhaling product dusts. The water temperature doesn't have to be lower
than 25°C preferably. Disconnect the watermaker’s sea water inlet hose and discharge
hose.
4.
Insert the end side of the 2 hoses into the bucket, verifying that the hoses have been
properly dipped in the solution and that they don't inhale air.
5.
Open the depressurization valve at 45°.
6.
Start the watermaker (with both pumps, and bypass activated ) and leave the system on
for approx. 30-40 min., checking that the hoses are properly positioned in the container,
so as to avoid drawing air or spilling the liquid into the boat.
7.
Turn the watermaker off, and re-connect the hoses, without drain out the solution.
When the unit is restarted open the depressurization valve at 45° for about 10 minutes in order to
completely drain out the chemical solution.
Chemical Cleaning Kits:
Schenker No 1 is an acid based organic cleaner.
This is used for 'pickling' the watermaker when not in use and as part of the general cleaning
process. See 4.1 Shutdown procedure
Schenker No 2 is an alkaline base organic cleaner. If the watermaker has been left standing
without pickling or has a 'bag egg” smell, cleaning with Schenker No2 will remove this.
