1, the electric heaters of the auxiliary electric heaters should comply with the standards of JB / T4088-99 2, the auxiliary electric heater cylinder should be able to withstand 10 kg of water pressure detection, no leakage, no deformation 3, the auxiliary electric heater does not exceed +5% – 10% 4, and the overall anti-corrosion treatment of the auxiliary electric heater 5, auxiliary electric personal heater heatingThe cold-state leakage current should not exceed 0.5 mA, no more than 5mA 6, the auxiliary electric heater is not less than 100mΩ, should not be less than 10 mΩ 7, auxiliary electric heating when workingUnder the conditions of the operation current 10 mA, detecting voltage 2000V, maintained 1min free to wear flashing phenomenon 8, the water flow of the auxiliary electric heater passes throughout the water flow should not be less than 10.5 m3 / h