The invention relates to a self-control preheating central
water supply system for gas water heaters. The
system mainly comprises a
water heater main body, hot / cold water inlet / outlet pipes connected with the main body, and
control valves arranged on the pipes. Two or more
water consumption branches are connected on the hot water outlet
pipe. The central
water supply system is characterized in that: the
water heater main body is also connected with a circulating device via pipes, a
master controller and a flow meter are arranged inside the main body; the
master controller is also connected with a
remote manipulator, the circulating device is provided inside with a controller, a temperature-sensitive probe electrically connected with the controller, a water
circulating pump and a flow meter, a one-way valve is arranged on the loop of the circulating device, the remoter
manipulator, the
master controller and the controllers are connected with one another by means of two-way non-polar safety
voltage carrier
waves, the main controller receives information from the controller of the circulating device and the
remote manipulator and collects temperature and
water flow data of the main body for further analysis and treatment, thereby forming the
automatic control system of central water preheating. The system has the advantages of multiple functions, full-automatic
intelligent control and good application effect.