... control, heat cycle, the exhaust, pressure control, temperature display, the transfer liquid injection / discharge , ... Consumption< 4WAccuracy of temperature measuring±2oCRange of collector temperature measuring-10200oCRange of tank temperature measuring0100oC Suitable power ... function: a, heating return rising, b. temperature controling, c: high temperature reducing. d: by-pass pipeHoliday fucntionHND ...