thermital MODEX ACS 40 E, Instruction Manual

Page: 10 / 28

10
WATER CONNECTIONS
CONNECTION TO THE WATER CIRCUIT
K
6
2 2
1
5 4
3
7
1 Safety valve
2 Shut-off valve
3 Pressure gauge
4 Non-return valve
5 Pressure reducer valve (necessary for K>=6 bar)
6 Fine mesh filter
7 Expansion vessel (accessory)
K Fitting for domestic cold water supply
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
Install a filter in the domestic hot water circuit to capture impurities and protect the circuit. Also install a non-return
valve and an expansion vessel along the domestic cold water supply.
If the water supply is harder than 25 to 30 °Fr, a suitable
treatment system should be installed upstream from the
water heating system to prevent corrosion and the forma-
tion 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 ACS 40 E 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 neverthe-
less advisable to check their tightness after installing the
product. It is also necessary to test the product for water
tightness at operating pressure when putting it into ser-
vice.
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 15-30
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