I have Alpha pumps and valves on the outlet of my heat loads, based solely on your posts.
I run three Alpha's. One on the boiler, one on the DHW and Air water heat exchanger, and one for the radiant floor in the garage.
The DHW and AWHX are on a 3 way zone valve. When call for house heat, the valve sends water just to the AWHX. I throttled that back with a valve to the point where I get 170* in, and about 130* out. When no call for heat, the water circulates through a sidearm, then plate for DHW. I have that choked off so I'm getting 140* return. Alpha reads from 0 to 1 GPM when running through DHW, between 1 and 2 GPM for AWHX.
The Alpha for the garage radiant runs all the time. It circulators water just through the outer edge of the concrete via a manifold with zone valves. When a call for heat, the other three zones open. This was to keep the outer loop from freezing, since I did not insulate the perimeter of the concrete or foundation.
So I have two problems with this setup personally, I'm sure there are lot more for the people in the know. One problem with using a manual valve to throttle water flow, as the storage cools, so does the output of the AWHX. I figured if could have a set return temperature, I can better tune the blower speed to make sure I am getting a good heat output, plus extracting as much useable heat as I can before sending it back to storage. The other problem is I am not getting as good of performance with my sidearm and plate setup as I was with full flow. My logic was that I'm not moving the water through them quick enough. I don't know if that is even the case. I am getting better stratification but, seemed to have sacrificed performance at the heat loads.
In regards to my DHW, I lost 20 degrees of heat by throttling the flow back. I have never been able to get the DHW up to the same temperature of my storage. With 180 water, the DHW would get to 160. Now the best I can get is 130 to 140 and recovery time is much worse.
That's exactly what I was looking for, just wasn't sure how to hook it up to make it work. Now that I see it, it makes sense. I ordered the AM101R, will try to get it hooked up this week and report back. With my setup, I'm fighting a losing battle. I have my returns going in the top of the tanks. The return pipes extend down into the bottom of the tanks but, I have some heat transfer between the hot water at the top, and the cooled water getting pumped to the bottom. I never considered stratification when I was putting everything together. At this point, I'm trying to salvage a flawed design.Thermostatic mixing valves work well to control the return water temperature back to the storage tank(s). I use the Honeywell AM10R mixing valve to control the water temperature back to my storage for my in duct heating coil. I have 4 loops on my storage system which all incorporate a mixing valve to maximize the storage tank stratification.
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Thanks for sharing your setup. It's working better than anything else I've tried so far. Fire finally went out around 2. So far, I've lost 5 degrees at the top of the tanks, and 30 degrees at the bottom. Before, the most I would see is a 20 degree difference, usually less.Good to hear you are getting the results you wanted, These little valves are a cost effective way to control return water temperatures back to the storage
It was a bit of a compromise... I originally had an oil boiler only with supply and return headers zoned with circulators.It would be interesting to see flow meters on those "P" circulators. It looks like they go in and out of series with C-1? It's not a primary secondary piping according to the way the returns tie back to the loop?
It seems if C-1 and P-1 were running, there would be some high flow and velocity. As P2 and P3 power on what does the flow rates in P1 look like?