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Posted by Bisseti on April 05, 2011 at 00:09:34:
In Reply to: Re: triangle tube boiler and pump posted by HeatPro on April 04, 2011 at 10:39:06:
It is my understanding the the "central heating" circulator which Triangle Triangle tube puts on the 'primary loop', should be sized the same as the heating circulator. The 30 number then is the head loss for my heating circulator (longest (3/4" pex) circuit climbs 25 ft and requires 20k btus.
It is also my understanding that this primary loop circulator is a kind of an insurance policy / backup for the system circulator in addition to keeping the pressure in the primary loop.
The orange would be piping the domestic off the secondary loop before the heating circuits and/or cutting out this primary loop pump. At the very least cutting out this super $ pressure valve.
By the way, i'm a homeowner in deepish water. I'm trying to work out the design of this system with my old time plumber. I know this is not recommended but it's reality.