Domestic appliances furring indicator - has temp. sensor near through flow water heater or water delivery pipe

摘要

A temp. sensor is provided near the flow heater or the hot water delivery pipe. It responds to a temp. in excess of the normal heating at this point. A second sensor (30) is provided near the flow heater or the part of hot water delivery pipe near the heater, which suppresses the display (36). Its response temp. is set above that of the first sensor (30), but it is set below the lower limit of the warming plate.