... WaySingle stage compression refrigerationRefrigeraterFrench Tecumseh RefrigerantsR4O4A USA Dupont environmental protection refrigerant(R23+R404)Condensing WayAir-cooled or water-cooledHeaterNickel chrome heating wire ... fuses, 1 power line.Safety deviceNon- fuse-switch(compressor overload, refrigerant high low voltage,over-humidity and temperature protection,Protection switch ...