Device Protection Features; Hydraulic Connection - Italtecnica Sirio SR23251 Serie Instrucciones Para El Uso

 DEVICE PROTECTION FEATURES
Dry running
Undervoltage on power line (activation at approx. 200 Volt)
Overvoltage on power line (activation at approx. 260 Volt)
Output terminal short circuit
 Motor output amperometric control
Internal overheating in inverter
Significant leakage with continuous motor pump restarts
 INSTALLATION
HYDRAULIC CONNECTION:
The Sirio must be installed on the pump delivery side, either upright or horizontally and respecting the
flow direction shown by the arrow on the cover. The pump outlet water flows through the device before
being distributed to the various appliances connected.
The water that enters the Sirio unit must not contain any impurities and/or other substances that could jam
up the check valve fitted inside it. To reduce this risk as much as possible, it is advisable to fit special
filters on the intake side of the pump.
Install a small expansion tank (1-2 litres) after the Sirio, to limit restarts caused by any small leakages
which are common in most systems. The pre-charge value of the tank must be suitable for the pressure
values set. This will also help to keep the operation constant in applications where water requirements are
greater (e.g. for dishwashers, toilet flushing systems, etc.).
On no account must a check valve be fitted between the Sirio and the motor pump or between the device
itself and the user appliances, as it could cause device malfunctions.
A check valve can be fitted on the motor pump intake pipe, though, to prevent it draining when the pump
stops.
It is recommended that you do not install the equipment in shafts or watertight casing where heavy
condensation can form.
CAUTION: when the pump stops, the conduits are still pressured so a cock must be opened to bleed
the system before any work is carried out.
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