Air separator placement

[huffdawg]

I am currently piping the near boiler and one end of my primary loop . The top of my primary loop will be higher than the top of my boiler circ loop . I will be tieing in my boiler circ loop to the bottom of my primary loop via closely spaced tees. I moved the air separator/expansion tank inlet that came with the EKO to the middle of highest spot in the primary loop.

My question is do I need another air separator on the top of the boiler circ loop ? or will the air eventualy find its way out to the primary loop xtractor

Thanx Huff

 

[RobC]

The best placement is just before a circulator with an expansion tank. This is hard to do because of WB mixing valves. So the default location is on the WB supply ( hot out ) pipe.
So by moving it higher and in the primary loop, where all the water will circulate seems logical.
Can you place it before your primary circulator so you get the point of lowest pressure too ?
https://www.hearth.com/econtent/index.php/forums/viewthread/40804/
Here is a reply from HR that addresses the situation.