characteristic Temperature control range: inlet water temperature +15 ℃ ~ 120 ℃ Return water temperature display Heating power switching function Automatic exhaust function after startup Hot water by-pass pressure relief circuit Stainless steel integrated pipeline reduces pipe resistance and rust scale Siemens Omron Fuji Abb Schneider Isolated electrical control box to extend the service life of electrical appliances Multi point temperature control can be customized Pump horsepower and heating power can be customized Explosion proof device (optional) Air blowing and water return function (optional) Negative pressure system operation (optional) Instant cooling shutdown function (optional) RS485 communication function to realize automatic management (optional) PLC control, system dynamic flow chart display (optional) Perfect safety protection, fault display, repair and maintenance without professional personnel