Hansen Technologies Auto-Purger. Model: AP08. Refrigerant: R-717 (ammonia). Rated capacities: 1500 tons at positive suction pressures or 750 tons at suction pressures below atmospheric pressure. Power supply: 120 V. Evaporator chamber. Water bubbler. Hansen Technologies fluid float switch. Hansen Technologies liquid drainer. Hoffman control panel. The AUTO-PURGER is an automatic, electronically-controlled non-condensable gas (air) refrigerant purger used for reducing condensing pressure. Inlets: (2) 1 in. dia. NPT fittings. Outlets: (2) 1-1/2 in. dia. port. Overall dimensions: 4 ft. 10 in. L x 3 ft. 5 in. W x 2 ft. 1 In. H.(ACN95a).