Riello SC ACS 80 Manual page 10

WATER CONNECTIONS
CONNECTION TO THE WATER CIRCUIT
b
In case of recirculation, provide a suitably sized expansion tank in order to avoid overpressure due to thermal ex-
pansion and water hammer.
DHW water network must follow the prescriptions of the current legislation.
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
pH
Saturation index (PH
delta)
Total hardness
Conductivity
Solid substances
Free chlorine
Hydrogen sulphide
Ammonia
Bicarbonate
Bicarbonate/Hydrogen
sulphide
Sulphur
Nitrate
Nitrite
Sulphate
Manganese
Dissolved iron
Free, aggressive car-
bon dioxide
10
MAXIMUM
PERMISSIBLE
UNIT OF VALUE FOR
MEASURE COPPER-
BRAZED HEAT
EXCHANGERS
7-9 (indicative of
saturation)
-0.2<0<+0.2
°Fr 7-15
μS/cm 10...500
mg/l <30
mg/l <0.5
mg/l <0.05
mg/l <2
mg/l <300
mg/l >1.0
mg/l <1
mg/l <100
mg/l <0.1
mg/l <100
mg/l <0.1
mg/l <0.2
mg/l <20