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4.4.2 Models with hydronic kit
In these models, the connections are positioned outside the unit.
• Remove the protection caps from the connections.
• Connect the pipes to the connections.
For threaded connections:
• Fasten by holding a part in order o tighten the other part.
• It is recommended to seal with hemp and green paste.
For Victaulic connections:
• Secure by using the appropriate coupling system (not supplied).
4.5 System fill-up
A Pump drainage shut-off valve
• Before performing any operation, make sure the main switch is off.
• If the hydronic kit is installed, make sure the pump drainage shut-off valve (A) is closed.
• Make sure that the drain valves are closed and the air vent valves are open.
• Open the shut-off valves of the water system.
• Start filling.
• When the water begins to leak from the vent valves, close them and bring the water pressure
to the value required by the system (1 - 1.5 bar). Keep in mind that safety valve calibration is
6 bar.
• When the water pressure has stabilised (read the pressure gauges installed on the upper side),
close the fill-up valve and check the tightness of the various joints.
It is advisable to periodically check the pressure in the water circuits to prevent
malfunctions.
The water circuits must always be topped-up with the pumps off.
4.6 Desuperheater connection
A
Rear panel
14
The connections are positioned inside the unit.
• Remove the inspection panels (A).
• Remove the protection caps from the connections.
• Connect the pipes to the connections.
For threaded connections:
• Fasten by holding a part in order o tighten the other part.
• It is recommended to seal with hemp and green paste.
For Victaulic connections:
• Secure by using the appropriate coupling system (not supplied).
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