Improved flow control and improved heat rise control device for water heaters

摘要

#$%^&*AU2011213724B220160324.pdf#####ABSTRACT Disclosed are systems and devices for controlling the amount of water passing through a heat exchanger and the amount of water that by-passes the heater without passing through the heat exchanger. In some embodiments, the system includes a by-pass valve assembly having means for sensing a time-varying characteristic of fluid adjacent the inlet, means for sensing a time-varying characteristic of fluid adjacent the outlet, and a valve that alters the amount of fluid by-passing the fluid heater in response to differences in the timevarying characteristic of fluid adjacent the inlet and fluid adjacent the outlet.FIG.1I HEAT EXCHANGER BYAS ATER 1/11 RETURN TO POOL FROM POOL FIG. 2