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Mend Ferroli Optima 901 Expansion Find Boiler

ferroli optima 901 expansion vessel location?

Hi
I cannot find the expansion vessel,can anybody tell me where it is on the boiler?
I have taken of the covers and cannot see it,the manual says its capacity is 7 litres but the isnt anything that big in there.
The only thing that remotely looks like it is the air separator and automatic air vent.

ant help thanks

steve
March 2007
FerroliFerroli Optima 901Heating, Home Heating SystemsExpansion Find Boiler
thanks

steve
March 2007
standard they are set to 1 bar which is 14 psi.

hi-spec plumbing
March 2007
Found it,its at the back of the unit.What pressure should it be?
Read somewhere check when ch sys pressure zero and vessel pressure should be 10psi.

steve
March 2007
look up the right hand side

hi-spec plumbing
March 2007

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Ferroli Optima 901: Expansion Vessel Location