... low pressure start gas water heater 2.Flame Failure Protection,big LED screen 3.Anti-freezing device 4 Gas water heater1.Auto-cut ... ignition is applied for the unit, double-ignition device with high rate, the flame is sensed by ion, this sensitive control can ... -dry combustion protection: once dry combustion occurs, the protection device will shut off gas supply automatically.4.Over-pressure protection ...