Weil-Mclain #AHE-45 - Ted Punskovsky

Ted Punskovsky

I am installing a Weil-Mclain #AHE-45 wall hung type boiler for a radiant heat system in a penthouse in NYC. The pump for this boiler is integral and has a built in mixing valve as part of thepump housing.

How can I use the pumping away arrangement with this type of boiler. By the way, i am installing a four waymixing valve and using primary and secondary type piping.

Where do I put the expansion tank and Spirovent so that i do not have any air problems.



Thanks,


Ted

Alan(CaliforniaRadiant)Forbes

Great boiler

Primary loop the boiler and then pipe to a secondary (closely spaced tees); this seconday loop is where you'll install your purge assembly, air eliminator, circulator, etc. for pumping away.

All the best,

Alan

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Ted Punskovsky

Alan,

Thanks for reply. Isnt this particular boiler its own primary loop?

Alan(CaliforniaRadiant)Forbes

You need to pipe

the primary loop; there is a mixing valve, but that is only to protect the boiler from low return water temperatures.

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