Aquatec Watermaker AC 110, Technical Manual

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8
Switch off the system, fresh water flush.
1) Open the pressure control valve until the plant runs without pressure.
2) Run the Aquatec several minutes to remove the concentrated salt from the membranes.
3) Turn three-way valve (no. 2) to position test-outlet.
4) Switch off the high-pressure pump first and then the feed pump.
5) Close the sea water intake valve.
6) Open valve (no. 3). The fresh water pressure pump of the boat should turn on now flush the system.
Duration of flushing time see
below
“flushing time”.
7) Close valve (no. 3) to finish the fresh water flush.
Description fresh water flush
The fresh water rinse is activated by opening valve (no.3). For this, the seacock must be closed. When
that valve is open, fresh water could drain to the sea.
At least 10-15 liters of fresh water is required per membrane A charcoal filter removes any existing
chlorine inside the fresh water tank which destroys the membrane.
Attention!
The carbon filter ensures a chlorine separation up to 4 litres/minute. If necessary,
the performance of the on-board pressurized water system must be reduced to
avoid damaging the membranes by prevent chlorine. This note only applies
when chlorine is used in the drinking water tank.
Membrane and HP pump reduce the flushing rate by their internal resistance.
Flushing time:
The time needed for the fresh water rinse depends on the board-side performance of the fresh water
pump and the condition of the membranes and therefore cannot be stated on factory side.
Please find out the required amount of flushing water by discharging the rinsing water into a bucket
once after a normal operation (take off the hose at the thru-hull fitting) and check the salinity
constantly by tasting. During the process, stop the time to find out the time requirement of future
flushes. By collecting it in a bucket, you also find out the needed amount of flushing water.
Hint:
If there is no chlorine present in the fresh water tank, running the feed pump and HP-pump can
accelerate the fresh water flushing. Thanks to the well-known pump performance of the HP-pump, the
necessary flushing time can be precisely adjusted. Note: the onboard fresh water pump must provide
sufficient flow. Performance of AC 65- 110 / 6 liter/ minute, AC 75- 135 / 11 liter/ minute, AC 150- 240 /
14 liter/ minute.
Attention!
Fresh water flushing of the Aquatec is recommended after each operation. It
reduced biological growth in the membrane and preserves the life span and the
reliability of the entire system.
After each operation, the Aquatec should be rinsed with fresh water. After fresh
water flushing, the system may remain unused for 7-14 days. This process can
be repeated as desired to avoid the use of chemicals.
Attention!
Prior to a longer period of shutdown (without flushing), the Aquatec has to be
preserved with the chemical no. 3 (Biocide). For instructions, see “Long term
preservation (mothballing) of the plant”.