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INSTALLATION ON AN OPEN EXPANSION
INSTALLATION ON AN OPEN EXPANSION
VESSEL CIRCUIT
VESSEL CIRCUIT
•
The appliance and circuit must be filled with the
expansion vessel open, with the water fed by
gravity via the charging line (dia. at least 18 mm).
While this is being done, all radiator bleed cocks
must be open to prevent air bubbles forming in
the circuit and preventing the water circulating
properly.
•
The open vessel must be at least 3 m higher than
the highest point of the primary circuit, and 15 m
lower than the product's delivery. The height of the
vessel must in any case be such as to generate
greater pressure than that of the circulation pump.
•
Never fill the circuit directly with mains supply
pressure, since this may be in excess of the
appliance's pressure rating and result in damage
to the appliance itself.
•
The safety line to the expansion vessel must be
able to vent freely without cocks and insulated to
prevent water freezing inside it, which can damage
the union.
•
The loading pipe must be free, without taps or
bends.
22
•
Do not exceed an operating pressure of 1.5 bar.
•
It is recommended to add antifreeze to the water in
the circuit (refer to UNI 8065).
INSTALLATION
INSTALLATION ON A CLOSED EXPANSION
INSTALLATION ON A CLOSED EXPANSION
VESSEL CIRCUIT (supplementary instructions to
VESSEL CIRCUIT
those for the closed vessel installation)
The pressure upline of the cooling circuit must be at
least 1.5 bar (UNI 10412 in Italy).
The thermal discharge valve (VST - not supplied)
must be connected to the cooling circuit (AL) with a
pressure of at least 1.5 bar.
S = discharge
INSTALLER
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