Riello SC ACS 160, Manual

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14
The connection to the sanitary water network must follow the prescriptions of the current legislation.
b
The domestic cold water supply must be fitted with a safety valve conforming to DIN 4753 part 1. The operating
pressure of this valve must be equal to the unit’s maximum operating pressure.
b
If the pressure of the water supply reaches 10 bar, install a pressure reducer downstream from the water meter.
b
We recommend the installation of a suitably sized potable water expansion vessel.
b
The domestic cold water supply must be fitted with a suitable water filter. Provide an expansion tank, suitably sized,
in order to avoid over-pressure due to water hammer and thermal expansion.
WATER PARAMETER
UNIT OF
MEASURE
MIN/MAX
PERMISSIBLE
VALUE FOR
COPPER-BRAZED
HEAT EXCHANGERS
PH
7-9 (indicative of
saturation)
Saturation index
(delta PH)
-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
In presence of water with hardness above 15° Fr, is pre-
scribed an appropriate treatment of the heating water, in
order to avoid limescale problems. It should be noted that
even a small quantity of limescale, could reduce the per-
formances of the domestic side.
The materials of construction are in compliance with the
Directive 98/83 EC.
Despite the fittings are mounted at the factory, it is advis-
able to monitor all screw connections. Equally important
is to do a pressure test during the operation.
Exceeding above listed limits may cause damages to
module and impair warranty terms consequently
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.