Three-way CH Boiler Valve Monitor

摘要

In the author's homeland natural gas powered combination boilers are the standard source of central heating (CH) in private homes. These highly effi- cient apparatus not only provide heating via the radiators, but also take care of the hot water for the kitchen and the bathroom. When a hot water tap is turned on, a three-way valve diverts the hot water from the normal central heating circuit to the heat exchanger/tank for the hot water. This valve can sometimes leak during the normal heating cycle, with the result that water with a lower temperature is fed to the hot water tank, which therefore cools down the hot water. This increases the number of hot water heating cycles, which leads to a higher gas usage than necessary.