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Re: Follow directions if possible


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Posted by HeatPro on July 31, 2006 at 13:03:00:

In Reply to: Re: Follow directions if possible posted by Ruth on July 31, 2006 at 12:46:28:

Where the expansion tank is located is the point of no presure change in the larger system whether the circulators are on or off. With their internal pump pumping into the boiler, they are starting with whatever pressure is in the system at the inlet to the boiler, then providing some pressure until the water leaves the boiler. It is a complication that isn't good practice if you don't put the second circulator pumping away from the expansion tank. That is why they also say to PUT ANOTHER CIRCULATOR IN THE SUPPLY pumping away from the expansion tank in the supply side of the boiler. That is then the true 'pump away' idea to make up for NOT HAVING USED THEIR PIPING DIAGRAM.

In other words, no matter whether you use their diagram which is the BEST way to do it, or you allow the system to be piped as an often-used in-line series piping method, you still wind up with two circulators. So you may as well have the system repiped to how the factory instructions say - to the loop-subloop according to their drawings.


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