▲ Explosion proof equipment for pipe. ▲ Air blowing amd return water function(optional). ▲ Return water temperature gauge. ▲ Start-up automatic exhaust function. ▲ Heating power change-over function. ▲ Hot water BY-PASS pressure relief loop. ▲ Instant cooling shut-down function. ▲ Multi-point temperature controlunit(optionally ordered). ▲ Water pump horse power and heating power(optionally ordered). ▲ Electrical equipment made in OMRON. FUJI.TE.LG. ▲ Temperature control rarnge:water temperature at inlet:+15℃-180℃. ▲ 304stainless steel pieline to reduce pipe resistance and rust deposit. ▲ Disconnecting control box for electrical equipment to prolong service life of the electrical equipment. ▲ Rs485communication fumction to realize autoimmunization management(optional). ▲ Control method:imported microcomputer or PLC control. ▲ Improved safety protection,fault indication,maintenance and service without professiomnals.