The indirect heating unit control system monitors the operation data of the primary, secondary side temperature, pressure and electrical equipment, the purpose of controlling the heat change and the secondary cycle is achieved by adjusting the opening of the backwater electric regulating valve and changing the frequency of the circulating pump transducer, realizes the heating demand of high efficiency and high quality. System has the incremental fuzzy PID control, self-learning control function, fault detection and security protection, automatic climate compensation control, time control model and maximum flow restrictions, fixed value control function.

The system can be independently operated by single thermal station, and can be connected to the heating monitoring system through CDMA/GPRS/ADSL public communication platform to realize the coordinated operation of multiple heat sources and multi-thermal stations.