Good day folks
First many thanks, especially to David, for your help in determining the needed BTU's to heat air. It was a very good discussion for me which forced me to defend (I believe successfully) to heat my domestic water with a Hybrid Heat Pump Water Heater.
Now that the decision has been made to go this route for the domestic, I was able to greatly simplify the space conditioning system. While I am not a professional and have never designed a system before, I do have a significant knowledge gained via a formal hydronic heating course, extensive review of Ziggy's Modern Hydronic Heating text, and through discussions on forums like this one.
I was hoping for some critique on the layout I have come up with. Be as brutal as you like as long as you explain your disproval - if there is any :-)
I would be interested in any recommendations for tweaks or additions to the diagram. For instance, do I have check valves in all of the recommended places.
I have tried to include ball and purging valves wherever there is equipment that may need to be serviced and also at the bottom of multi-story runs.
This system will be providing heating in the winter months and switch over to cooling in the summer months. There will be a significant portion of the year (shoulder months) when the system will be dormant due to internal heat gains and the high-performance building envelope it is being installed into.
Many thanks in advance for any guidance provided. I will be happy to answer any questions if more info is needed.
I have attached the circuit diagram as both a PDF and a JPG