... ℃,open the magnetic valve to feed water;stop when T1,T2≤40℃.When H1 to 100%,T1,T2≥T3 to 10 ℃ to start the heat ... , anti-freezing circulation.5.T5 pipe circulation,there is three ways:1.Time circulation.2.Temperature control circulation.3.Temperature differences ... . When T3>T4 to 10℃ start, T3≥ T4 to 2℃ stop. Note: H2≥50% as forced to 6% water level to ensure the electric heater ...