I have a facility which has several AAON RTUs . The refrigerant is R410a . The past month two ( 2 ) liquid line filter driers have ruptured . One was OEM installed Sporlan and the other ( ALCO / Emerson ) was field installed by others due to compressor replacement by others. Has anyone else seen liquid line driers explode ? These RTUS are part of the package ; have to take these AAONS on as part of the contract . I was called in last night because a drier failed and released the refrigerant . There was 27 pieces of fire equipment on site when I arrived . It is a 1.2 million sq ft facility . Apparatus from neighboring counties plus everything from local county .