BIANCHI VENDING BVM972 Use And Maintenance Manual page 64

6.5 BRITA decalcifi cator fi lter
It performs water decarbonization, reduction of organic impurities
(such as free chlorine, its compounds and pesticides).
They remove the temporary water hardness , and some heavy
metals such as lead and copper.
They neutralize build up of bacteria through active carbon treat-
ment on Silver base.
The fi ltering compound of the Brita fi lter AcquaQuell 06-B
BRITA AquaQuell fi ltering systems (AquaQuell 33,1,2,3) contain
ionic-exchange resins and activated granular carbon with the pur
pose of optimizing drinkable water.
The cationic-exchange resin (IER) is an artifi cial polymer with
acrylic base. Groups are linked to the polymeric chains in their
H+ form.
In the whole exchange process,
copper and lead are exchanged with protons.
Since IER is a weekly acid resin, only the temporary hardness is
removed (The grade of acidity is given by the H+ concentration).
The granular active carbon (GAC) is produced by the coconut
shells which are charred and activated in oven.
The activation process gives an exchange surface whose GAC can,
by alloying organic impurities to it such as disinfectants, chlorine
and pesticides such as lindane and atrazine, etc.
Water hardness
°F
10,5
4,5
18,0
21,5
25,0
28,5
32,0
calcium cations, magnesium,
Capacity
lt
700
520
420
350
300
260
240
Water hardness detection systems
There are various systems to check water hardness level, from
immersion stripes sensitive to calcium hydrogenate dissolved in
water, to ortolidina kit which can make water colour change in
presence of given percentages of Ca and Mg dissolved in it.
Through the immersion strips the darker colour shows a lower
hardness of water, the lighter colour a higher hardness. (see
diagram)
Set BRITA fi lter duration through the kit supplied with the decalci-
fi cator. Then, enter the data in the programming software so that ,
after a number of selections, the maintenance operator is warne
No. of supplies
130 cc.
5300
4000
3200
2600
2300
2000
1800
64
HIGHER THAN 9°F
HIGHER THAN 18°F
HIGHER THAN 27°F
HIGHER THAN 37°F
HIGHER THAN 40°F
150 cc. 180 cc.
4600 3800
3400 2800
2800 2300
2300 1900
2000 1600
1700 1400
1600 1300