10
WATER CONNECTIONS
CONNECTION TO THE WATER CIRCUIT
b
The pipes between the product and the storage cylinder should be kept as short as possible.
b
Connect the product to the domestic cold water supply as instructed.
b
For domestic hot water production systems, provide a filter to collect impurities to protect the system itself. Provide
an expansion tank, suitably sized, in order to avoid over-pressure due to water hammer and thermal expansion.
If the water supply is harder than 15 °Fr, a suitable treat-
ment system should be installed upstream from the water
heating system to prevent corrosion and the formation of
limescale.
Bear in mind that, because of the low thermal conductivity
of limescale, even deposits of only a couple of millimetres
in thickness can significantly reduce the efficiency of the
water heating system.
The SC ACS 80 hot water mixer is made from materials
that conform to the requirements of Ministerial Decree
174/2004 (Italy) implementing Council Directive 98/83/
EC.
All fittings are assembled in the factory. It is nevertheless
advisable to check their tightness after installing the prod-
uct. It is also necessary to test the product for water tight-
ness at operating pressure when putting it into service.
b
Values in excess of those specified in the table
alongside can damage the product and automati-
cally invalidate the warranty. It is therefore important
to analyse the water to ensure that all values are
within the limits given in the table.
WATER PARAMETER
UNIT OF
MEASURE
MAXIMUM
PERMISSIBLE
VALUE FOR
COPPER-
BRAZED HEAT
EXCHANGERS
pH
7-9 (indicative of
saturation)
Saturation index (PH
delta)
-0.2<0<+0.2
Total hardness
°Fr
7-15
Conductivity
μS/cm
10…500
Solid substances
mg/l
<30
Free chlorine
mg/l
<0.5
Hydrogen sulphide
mg/l
<0.05
Ammonia
mg/l
<2
Bicarbonate
mg/l
<300
Bicarbonate/Hydrogen
sulphide
mg/l
>1.0
Sulphur
mg/l
<1
Nitrate
mg/l
<100
Nitrite
mg/l
<0.1
Sulphate
mg/l
<100
Manganese
mg/l
<0.1
Dissolved iron
mg/l
<0.2
Free, aggressive car-
bon dioxide
mg/l
<20
DHW water network must follow the prescriptions of the current legislation.
b
In case of recirculation, provide a suitably sized expansion tank in order to avoid overpressure due to thermal ex-
pansion and water hammer.
