Hansen Technologies Auto Purger. Model: AP16. SN: N2725. Refrigerant: R-717 (Ammonia). For multiple purge points, up to 16 Points. The AUTO-PURGER is an automatic, electronically-controlled noncondensible gas (air) refrigerant purger for reducing condensing pressure. Power supply: 120V/60Hz, 3.0 amps. Inlets: 1/2 in. dia. water line. 1/2 in. dia. high pressure liquid line. 1/2 in. foul gas” line from high pressure condensers & receivers. Outlets: 1 in. dia. water drain. 3/4 in. dia. suction line to system. Overall Dimensions: 3 ft. 2 in. L x 2 ft. W x 4 ft. 6 in. H.