Looking for photos of piping with Heat Exchanger for glycol

Brad White_24

but to your second question, how to fill a system with no direct domestic CW connection, I specify Axiom feeders. They come in a few sizes and pressures, but their residential line is limited to 18 psig which chould be fine for most houses.

http://axiomind.com

Kevin_31

I am adding a zone that needs freeze protection

so I am looking any pics of a similar system. I will be using a Taco Brazed Plate Heat Exchanger. I am considering not hooking up a water feed line so what's the best way to fill the system?
Thanks,
Kevin S.

Weezbo

you are speaking of auto fill.

may i make a suggestion that HX require some degree of maintinance and it may not be a requirement to auto fill it if it is being monitored and matained within a schedule. we have a guy here who sells Rhomar chemicals for all sorts of applications .there is plenty i dont know buh at least i have some idea as to where to find accurate information on some things,he would be a source for some of the whys and wherefores of various levels of quality installations. do you need something =2 or more than a 60% solution on the coil /emmiter side? if so i would like to know what his thoughts are on a small system of under a couple gallons...seeing 60 below temps...unfortunately i lost a group of his posts along with others that i had saved when my computer crashed...he may have completely answered my question, i honestly forgot... control of the pump in low "Water" conditions would be likely a valuable asset to the system as would a purge to the recovery tank. im thinking.

Ericjeeper

My manifold has a fitting

My Mr Pex manifolds have a fitting on the end. I mixed my antifreeze in a plastic trashcan. Then used a utility pump and pumped the mixture in and watched the pressure guage .You will need some sort of air elimintation valve. I like my spirovent. which is mounted on top of the expansion tank.
By all rights with no leaks once the air has bled out The system since it is a closed system will require no make up water.
As long as you have a pressure guage you will be able to monitor for leaks. Is that a double wall heat exchanger?

hr

A ball valve

with a boiler drain piped on either side allows you to pump in one side and purge via the other.

Webstone makes a valve ALMOST ideal for this. It is a ball valve with side taps on either side of the shutoff point.

Actually I prefer a ball valve with a hose connection. Pumping into a boiler drain can sometimes dislodge the washer. They hate reverse flow.

And yes you will need an air purger, expansion tank, and relief on the B side of the HX. A low water cutoff could protect the circ in the event of a loss fluid condition. On small systems really no need for a glycol fill system. If all the air is purged at fill time you should be fine.

hot rod

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David Sutton_6

David Sutton_6

Kevin_31

Thanks Hot Rod

It's a small zone so I will pass on the glycol fill system. As for the air removal, I am partial to Spirovent. I think the low water cut off is a great idea and will include it.
Thanks,
Kevin

David Sutton_6

David Sutton_6

David Sutton_6

David Sutton_6

here's one

this was a very old house with a 4 season porch, the only room with glycol, so i piped it in this way. hope this helps...David