6
– MAINTENANCE (ROUTINE AND EXTRAORDINARY)
COD.60M12/24.A.2018
EN
THE PRESENT MANUAL BELONGS TO -
Schenker Italia
- ALL RIGHTS RESERVED
47
6.6 Antifreeze procedure (Winterizing procedure in cold climate - under 5°C)
It is recommended to first perform the normal shutdown procedure by using SC1 in order to clean the system
properly and prevent bacteria growth and inorganic material deposit.
After this operation, Then the system must be flushed and filled with an antifreeze.
The recommended antifreeze product is a solution of
propylene glycol and unchlorinated water
.
The ideal concentration of propylene glycol is
-
45% (for temperatures up to - 20°)
-
55% (for temperatures up to - 30°).
ATTENTION
Do not use ethylene glycol as this substance is toxic and non-degradable.
The total volume of the solution must be about 15-20 liters.
The procedure is similar to that used for chemical washing with SC1 and SC2 products:
1.
Prepare the solution carefully mixing the propylene
glycol with 15-20 liters of unchlorinated water
by
following the concentration suggested above.
2.
Disconnect the drain hose and the pumps suction
hose.
3.
Connect two hose pieces to the drain and to the pump
suction.
4.
Insert the end side of the 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 the by-pass activated.
7.
Leave the unit running for approx. 15 minutes, checking
that the hoses are properly positioned in the recipient,
so that to avoid inhaling air or spilling the liquid into the
boat.
8.
Shut the plant off and connect the original hoses
taking care of not empty the system daring out the
solution.
HYDRAULIC SCHEME FOR
WINTERIZING PROCEDURE
FIG. 6-2
ATTENTION
It is necessary to perform the first start-up procedure when restarting the plant after a shutdown
procedure, in order to purge the air and drain out board the chemicals in the systems.
Before proceeding with any kid of service it is strongly recommended to read carefully the instruction
contained in this manual.
