23
R1K 75 - RAD - ING - Man.Inst. - 1901.1_
SK.2
_con_PA_AHS
1 Riempimento
dell'impianto_MIAH4_R1K
100_v
.2_EN
1. INSTALLATION
INST
ALLER
Hardness
The filling and make-up water hardness brings
a certain amount of limestone into the system.
It attacks the warm parts of the exchanger, thus
creating load losses and thermal insulation losses
on the active parts. This phenomena can cause
damages.
The filling and make-up water of the system, if
it does not fall under the values indicated below,
should be softened. Moreover, additives can be
added in order to maintain the limestone into
the solution. The hardness must be periodically
checked and registered.
Acidity
7 < pH < 8.5
Conductivity
< 400
μs/cm (at 25°C)
Chlorides
< 125
mg/l
Iron
< 0.5
mg/l
Copper
< 0.1
mg/l
If the above indicated limits are exceeded, a water
must be chemically treated.
The type of treatment to be performed will be
chosen based on the characteristics of the water
to treat, of the type of system and on the requested
purity limits.
