hydronic system with a vent on the roof

[deon1116]

hi everyone
i recently ran in to a hydronic system with a open vent on the roof.
the customer's complainting the system is losing water every couple days.
on the top floor there's a container with a site glass and vent to the roof.
does anybody have a solution for this problem?

[hvac1000]

Is that a steam system? If it is it is an old one pipe with a condenser box. best to call one of the Dead Men who used to install those systems. OR has it been converted from steam to hot water?

[BobbyBJr]

Need more information. As hvac1000 asked, is it a steam or hot water system? Does it have a make-up water valve and is it manual or automatic? Does the vent to the roof tie directly to the container with the sight glass?

Bobby

[slimwoodie]

itsa gravity system

so find the leak

[beenthere]

Use to see alot of those systems.
Its hot water.
The vent on the roof isn't the problem.
As Slim said, you have a leak some where.
Check inside the boiler, see if the combustion chamber is wet.

[james mo]

http://www.heatinghelp.com/newsletter.cfm?Id=148

[hvac1000]

Great link for this problem. Like I said in my other post (get a dead man to fix it. ) :>)

[deon1116]

itsa gravity system

so find the leak

but the thing is, that the newer boiler has a circulator pump.
is it still consider a gravity system.
should the vent be cap off. because who ever change out the old boiler, added a expansion tank at the boiler too.

[markwolf]

but the thing is, that the newer boiler has a circulator pump.
is it still consider a gravity system.
should the vent be cap off. because who ever change out the old boiler, added a expansion tank at the boiler too.

The old expansion tank & vent should have been completely removed from the system.The installers of the new boiler goofed.

[beenthere]

Its not gravity anymore.
The vent should be capped off.

[deon1116]

thank for the help everyone.