We have a high efficiency furnace that heats water which is piped thru a concrete slab. This is a question about air in the liquid and bleeding of the system.
There is one accumulator in the system. It hangs down from the piping and I assume it has a bladder. This is what I don't understand. Why is it below the piping? If air gets into the system (which it has) it has nowhere to escape. It continues to race around the loop causing noise in the pump and flow regulation valves.
Shouldn't the system's accumulator be above the piping to allow air to move into it and out of the normal liquid flow? And if the accumulator is not designed to bleed, then shouldn't there be a high point reservoir, with a bleed valve on the top?
Thanks