11
Long term preservation (mothballing) of the plant 1
Description:
Prior to a longer period of shutdown, the Aquatec has to be preserved
with chemical no. 3 (Biocide). After mothballing, the plant can be shut down for 6
months, depending on the environmental conditions.
Caution
: The conservation chemical no. 3 is a Biocide. Please consider the hazard
notes on the canisters.
Working with chemicals, please wear protective glasses,
breathing protection and rubber gloves for your own safety.
Follow instructions below to avoid that chemical get into your fresh water tank.
Attention
:
If there is the risk of frost, the entire pressure pipe with internal membrane in the pipe
should be dismounted (after necessary preservation) and be stored frost-proof with
closed hose connections. Can the membrane not be removed alternatively 20%-
50% glycerin in food quality can be added as an antifreeze to the biocide at
preservation. The plant has to be drained (filter housings, pumps, hoses). Remove
filter cartridges.
Instruction for mothballing of the Aquatec. Working pressure 0 bar!!!
Attention:
Make sure that you follow the following instructions carefully so that no cleaning
chemical gets into your fresh water tank.
1) Close the sea water intake valve.
2) Open the
pressure control
valve entirely, turn the product water three-way valve
(no. 2) to position
test-outlet
to avoid that chemicals get into the drinking water
tank.
3) Rinse the system with fresh water as described in “Fresh water flushing”.
4) Turn the three-way valve (no. 4) according to the flow diagram “Long term
preservation (mothballing) of the plant”. Open valve (no.1).
5) Dissolve the stated amount of biocide (no. 3) completely in 10 litres of water and
pour it into the tank for conservation. (To avoid negative pressure, do not close the
cap tightly) As a result of the water already in the system, (each pre-filter= 1 litre,
each membrane= 1.5 litres) together with these 10 litres, the result will now be the
maximum permitted concentration of 0.5% by weight. A level teaspoon corresponds
to 5 grams Biocide (Natriummetabisulfit).
AC 65/ 75
67,5 gr.
AC 190
82,5 gr.
AC 110- 150
75,0 gr.
AC 240
90,0 gr.
Note:
For preservation times of approx. 4 months, half of the chemical is sufficient.
6) Switch on the feed pump and the high-pressure pump. Let the Biocide circulate
through the system for about 2-3 minutes. Perform possibly exiting the test outlet
liquid back into the preservative tank.
7) The Biocide in the tank can be discharged overboard after turning the three-way
valve (no. 4). It should be noted that the system gets no air.
Hint:
To prevent any sediment remaining in the pumps after storing the system, it is
recommended to remove the high pressure hose from the HP pump output and to
wash out the system with fresh water again, this time
without
the membrane.