7.3 How to Check Hardness
To measure water hardness with the analyser (code 271800)
follow the instructions below:
1. Fill the clear recipient with the water you want to analyse
until the checkmark.
2. Add two drops of A reagent and shake carefully.
2 A-DROPS
3. If the sample turns blue, it means that water is fully softened,
but if it keeps a red colour, it means it has some hardness.
4. Slowly add more drops of B reagent until water turns blue.
The quantity of used drops corresponds to the hardness in
ºHF of the sample.
DROPS UNTIL TURNING BLUE
8. MAINTENANCE AND
HYGIENISATION
YEARLY
In order to guarantee the proper operation of the system, the
following verifications must be carried out as frequently as in-
dicated:
VERIFICATION
Check the salt level in the tank:
Check inlet hardness:
Check treated water hardness:
Hygienisation:
Anti-scaling:
Cleaning the salt tank:
Technical Service verification:
FREQUENCY
Monthly.
Monthly.
Monthly.
Yearly.
Yearly.
Yearly.
Yearly.
It is very important to carry out the hygienisation and anti-scaling tasks
separately, since the chemical products used for this purpose could have a bad
reaction when mixed. The hygienisation and anti-scaling tasks must be carried
out by turns, according to the indicated frequency.
SALT FILLING
The salt level in the tank must be frequently checked. The mi-
nimum salt level must be kept, which corresponds to a third of
the tank volume. If salt runs down before filling it up again, the
system will produce hard water. After the verification, check
that the salt deck is properly closed.
NOTE: For humid areas, it is recommended to keep a lower
salt level, filling it up more frequently.
RECOMMENDED SALT: Thick salt in tablets or balls contai-
ning less than 1% of impurities.
NOT RECOMMENDED SALTS: Salt stones, salt with impurities,
in blocks, granulated, in bars, or that used to cook.
HOW TO BREAK A SALT BRIDGE
Sometimes a salt bridge can get formed inside the salt tank.
This is due to a high level of humidity or to the use of an
inappropriate salt. When there is a salt bridge, there is an
empty space left between water and salt which prevents it
from dissolving. This means that the water softener will not
regenerate properly and supply hard water.
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