Good afternoon I’m having some trouble with plumbing my closed loop wood boiler into my indoor propane boiler. I have a 125 gallon buffer tank and my design is based on the simplest pressurized storage sticky. I think I piped my supply and return into poor location. I almost think I need to flip flop them. My wood boiler is 50’ away in an outdoor wood shed. The lines are 1 1/4” O2 barrier pex. I started with 300 gallons of storage but had issues so I now have 125 gallons and will be adding another 125 soon. I may have had an air lock issue but I couldn’t get my supply line to pump hot water into buffer tank. The return kept getting hotter and hotter and yes I triple checked my plumbing. My pictures will hopefully explain better. You will see my return for buffer is piped into my return manifold right before the pump, I think this is working against me! I appreciate all help
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