1.High efficiency . 2.CED digital display 3.Rotary control, easy to operate 4.Steam boiler manufacturers 5.ISO9001 Features : Features: Rotary control, easy to operate, economical and practical. Microcomputer intelligent control, CED digital display, Water temperature, combustion power, failure code, combustion situation will be saw clearly. Unique 60 ° C limited temperature protection function. ...