Riello SC SUN 300, Manual

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11
ENGLISH
possible! The recommended pipe material is steel or copper. When assembling pipelines and fittings, always observe the
installation sequence indicated, so as to avoid electrochemical corrosion.
a
The product must not be installed in natural circulation heating systems!
The collector circuit expansion vessel must be installed using a direct connection. The installation of isolating valves (ex-
cept for pressure regulators such as sealable closure valves) is not permitted! Tighten the fittings only when the pipelines
are hermetically tight. In any event, be careful not to tighten or apply any forcing action to preassembled components
and couplings of the module! Check also that the collars of all screw-threaded flat seal fittings are secured at the correct
tightening torque, as these connections can work loose during transport.
ELECTRICAL CONNECTIONS
Electrical connections must be entrusted to persons qualified under current statutory regulations. Connect the power ca-
ble of the electronic controller to a two pole switch complete with fuses (power supply 230 Vac 50 Hz). It is indispensable
that the system be properly connected to earth.
b
The control unit must be connected on the upstream side to the mains supply by way of a main differential switch in
accordance with current regulations. The manufacturer acknowledges no liability for improper use of the equipment.
b
Electrical connections must be made by a qualified technician.
b
Never under any circumstances dispose of the controller with ordinary household refuse. Dispose of the controller
only at designated collection points or return it to the dealer or manufacturer.
b
The manufacturer declines all responsibility for damage caused by failing to ground the appliance adequately or by
failure to respect the wiring diagrams provided in this manual.
USE
The SC SUN 300 module has stand-alone control capability.
To ensure correct operation of the module, the following parameters must be observed for each of the components indi-
cated:
b
Deviation from these specific values could result in the
SC SUN 300
being damaged, and consequently invalidate
the manufacturer’s warranty.
COMPONENTS
UNIT OF
MEASURE
MAX/MIN PERMISSIBLE VALUE FOR COPPER-BRA-
ZED HEAT EXCHANGERS
pH 7-9 (considering saturation index)
Saturation Index (ΔpH) -0.2<0<+0.2
Total hardness °Fr 15-30
Conductivity μS/cm 10…500
Filterable substances mg/l <30
Free chlorine mg/l <0.5
Hydrogen Sulphide mg/l <0.05
Ammonia mg/l <2
Hydrogen Carbonate mg/l <300
Hydrogen Carbonate/Sulphide mg/l >1.0
Sulphide 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 Carbon Dioxide mg/l <20