... swimming pool, industrial and mining enterprise domestic and industrial water. It is a wide range of uses, truly ... T1,T2≥50℃,open the magnetic valve to feed water;stop when T1,T2≤40℃.When H1 to 100%, ... T1,T2≥2℃(environment temp.),start the heat exchanger,stop after 8 minutes, anti-freezing circulation.5.T5 ... start, T3≥ T4 to 2℃ stop. Note: H2≥50% as forced to 6% water level to ensure the electric heater ...