We have a 1954 ranch house with hot water baseboard heating. The system is comprised of three zones with the heating pipes running under the slab of the house to each zone. The water is heated with an older Weil-McLain CGM boiler which is configured with the recirculating pump pumping through the boiler. A smaller pipe comes out the top of the boiler to the make-up connection and up to a steel compression tank. I've attached pictures to help illustrate.
I've had numerous problems with removing air from the system. I'm thinking about replacing the compression tank with an expansion tank and installing a B&G EASB-JR air separator. My question is how this should be configured? My thought is to cut the pipe running to the compression tank, north of the make-up connection, and install the auto air vent at this point (which is currently located at the suction side of the pump). I would then install an expansion tank vertically where the auto air vent was and install the air separator (with built-in auto air vent) in the horizontal run of 1" pipe before it turns down to the pump.
Are there any potential problems with this new configuration? Thanks in advance for any input or advice.