Honeywell AM100 onto domestic hot water coil

Hello
Looking for advice on installing a Honeywell AM100 series thermostatic mixing valve 70 – 140f. It includes union check valves.

My plumbing system is a well pump with a pressure tank that runs at 40 to 60 psi.

I am Installing it onto a domestic tankless coil in boiler.

If anyone has a drawing on how to plumb it into this system it would be much appreciated.

I’m Confused if I should be adding an expansion tank, pressure relief valve, heat trap, and what height the mixing valve should be installed in regards to domestic coil??

Any help would be appreciated. thanks