... set value,he circulation system will start work. It will transmit the solar energy from solarcollector to the tank.More ... funiction D. Multifunction: Bathing, washing, domestioc heating etc. E. Work at anytime and enjoyable F. Material of Model:1) the ... New trivalent element heat tube, borrosilicate glass 3.3 7) Solar working station: Controller, Circulation pump, expansion tank 5L-8L, manometer,flow ...