Ariston CLAS X - 4.12 EXPANSION VESSEL.

Training manual CLAS X
Pag. 37 di 69
4.12 EXPANSION VESSEL.
The expansion vessel absorbs primary circuit water expansion when there is a boiler temperature raise.
It is constituted by two parts separated by a SBR rubber membrane. On one side nitrogen on the other water
of the primary circuit. The nitrogen chamber (which can be compressed) absorbs the water volume increased
because of temperature raise.
Technical features
Capacity
8 litri
Maximum operating temperature
90°C
Nitrogen pressure
1 bar
Maximum operating pressure
3,0bar
INER
gas
WATER
Maximum water content in the system
(litres)
Heating circuit pressure (bar)