Can I use an existing refrigeration coil when replacing the outdoor equipment?
It’s possible, but not likely. With the industry switching to the R410-A freon, the pressures would rupture a coil that was designed for R22 freon. Also, old coils were designed to work with the less efficient outdoor units that were made years ago, so it would be like putting a governor on an engine. An old coil will not let the new outdoor equipment reach the potential efficiency or capacity it is designed to achieve.
