Hi BSH3239, If you do not understand Ammonia systems go with NH3LVR and call in a specialized NH3 contractor. I have not seen a compressor actually blow up in 24 years working with Ammonia, Have seen the damage from liquid from the surge drum as we call it over here, e.g. discharge valves and piston damage in piston compressors and rotor and main bearing damage in screw compressors. For removing liquid go with USICEMAN one of the best for infomation on Ammonia.
Arthur.