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3.5. Specificities
a. If the water softener is fitted to the hot water system only, a check valve must be fitted between the water softener and
the hot water system.
b. If a booster is installed, we recommend that the water softener is placed after the booster and that the pressure reducing
valve is fitted between the booster and the water softener.
3.6. Connecting the salt tank
a. Monobloc: Insert the end piece of the salt tank in the brine valve and check that the 4 corners of the salt tank are properly
positioned in the lower housing. In other words, there should be no space between the salt tank and the lower housing.
b. Duo: Connect the salt tank to the body of the water softener. Push the hose correctly into the brine connection. You will
be able to push it in several millimetres.
a.
Vi50 Monobloc
4. FILTER ON THE PIPE
Where impurity levels are excessively high, a protection filter can be fitted to protect the water softener and your pipes.
Where a filter is fitted on a pipe that runs to a water softener with integrated bypass, a stop valve can be fitted after the
water softener so that the filter coil can be changed without draining the entire system.
5. OPERATING THE WATER SOFTENER
5.1. Water hardness
Hard water is water that contains a lot of dissolved salts, mainly calcium and magnesium salts, for instance calcium carbo-
nate (lime).
The hardness of the water is an indication of the level of calcium and magnesium ions.
The most common unit of measurement of water hardness is «French degrees» (°f).
1°f is equal to 4mg calcium (or 10mg lime)
and to 2.4mg magnesium per litre.
°TH = degré français, 10 mg CaCO3/l
°dH = degré allemand, 10 mg CaO/l
°e = degré anglais, grain CaCO3/gal(UK)
All manuals and user guides at all-guides.com
Vi30 - Vi50 Duo
French degrees
1 °f =
German degrees
1 °d =
English degrees
1 °e =
ENGLISH
61
b.
°d
°e
°f
0,56
0,702
1
1
1,253
1,78
0,798
1
1,43
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