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How Should a ModCon Boiler Use a 1/25 hp ECM Pump with 160 Gallon 4-Coil Solar Assist Storage Tank?
This question pertains to how to utilize a pump. I have solar assist. I am using a modcon combination boiler with emitters.
I have two 80 gallon tanks that I was thinking of hooking up in series. They each have 2 heat exchange coils. I was planning on using the lower two on each tank for the solar loop and the top two for dhw water to a combination modcon boiler. The 160 gallons I was going to run thru 4 baseboard emitters. The tanks are in a full basement. Three of the home run loops are up 1/2 floor. (See later post for updated schematic on coil and tank use.)
I wanted to push the water mass from the cooler storage tank with a Delta P pump to the hot tank and take out of top to the modcon combination. The way I was thinking included placing the Delta P pump with check valve at the return into the bottom of the cooler tank. (See later post for updated circulation post.)
I was looking for the best combination of storage and HX use. If I can not easily push that water, then I would have to probably supply and return via the tops of the tanks.
The other would of course be to change the use of the top two coils and use the storage mass for dhw.
What do you guys think? I have experience in water pumps with equipment use and general plumbing.
I know the Delta P can be used for emitters thru a loop. But how about the lifting of this water volume???
Thanks for your input!