6
– MAINTENANCE (ROUTINE AND SPECIAL)
COD.150Z230.B.2021
EN
THE PRESENT MANUAL BELONGS TO -
Schenker Italia
- ALL RIGHTS RESERVED
40
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 litres.
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 litres 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.
6.
Start the watermaker.
7.
Leave the unit running for approx. 5 minutes.
8.
Stop the unit and connect the original hoses. The
antifreeze solution must stay in the system. Take care
to not empty the system when reconnecting the hoses.
HYDRAULIC SCHEME FOR
WINTERIZING PROCEDURE
FIG. 6-2
ATTENTION
Before proceeding with any kind of service it is strongly recommended to read carefully the
instructions contained in this manual.
