boiler expansion tank location?

Uni R_2

They don't care, but they do emphasize that it needs to be properly supported if in the horizontal position.

Randall Hill

BOILER EXPANSION TANK POSITION

Does it matter which direction a hot water heat expansion tank is mounted, Horizontal or upright with the water inlet @ the top?
Any advise appreciated

GW

any way

is fine (the pressure can't tell direction), but when the thing gets water logged and falls on the ground because it's installed in some goofy manner, don't complain too much!

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Randall Hill

expansion tank direction

Thanks for the advise everyone.......
Hope ya all have a nice holiday....

Alan R. Mercurio_3

According to the IBR 2000 Manual it states that you should always mount the tank with its system tapping
UP- never on its side or upside down. This ensures the diaphragm will always be wet, avoiding cracking due to drying out of the elastomer.


Your friend in the industry,
Alan R. Mercurio

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Cosmo_3

always confused by that

What about the floor standing models, like say the SX-30V from Amtrol?

Does make sense, though. Thanks for the research Alan.


Cosmo

Alan R. Mercurio_3

You’re very welcome my friend. And as for your question regarding the SX-30V that’s commercial and a bit out of my league however you inspired me to go to their web site and take a look. I might be wrong but it appears that the way that one is piped the elastomer would still be covered with water.That's if that model actually has an elastomer type blatter? Just for the record though I would not take that to heart without confirming it with the folks at Amtrol.

The link below is to the pdf I found for the SX-30V check out Page 6.

SX-30V


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Alan R. Mercurio

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Cosmo_3

SX-30V

Piped from the bottom, air valve on top


Cosmo

Alan R. Mercurio_3

Cosmo, please forgive my ignorance to commercial applications. I believe I understand what you’re saying. However in the pdf it appears as though the tank is piped from the top??

Both my heart and mind are very open to being educated what say you?

Your friend in the industry,
Alan R. Mercurio

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brucewo1b

I think the reasoning there is

That any air in the drop pipe to the tank will rise out of the piping and out the vent, if you put the expansion tank off the top of the piping it acts as an air trap and that is where the concern lies.

Cosmo_3

no problem Alan

Lately with residences that are big enough to be labeled "Light Commercial", the SX series has become a staple of mine.
The SX series is basically the same as the standard tanks, except they are floor mounted. Not ASTM rated, they are used for larger systems that fall just under the ASTM tank requirements for larger BTU boilers here in PA.

http://www.amtrol.com/pdf/extrolsubmit.pdf

check out the link, it shows that the tank is piped from the bottom.

Cosmo

Alan R. Mercurio_3

That's interesting same web site showing two different sets of instructions? I guess asking the folks at Amtrol would be the best thing to do.

Thanks for sharing.

Your friend in the industry,
Alan R. Mercurio

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