G - Physics – 05 – D
Patent
G - Physics
05
D
341/32.1
G05D 23/20 (2006.01) F23N 1/08 (2006.01)
Patent
CA 1292535
87/355 HOT WATER HEATER CONTROLLER ABSTRACT OF THE DISCLOSURE A system is described for use with a hot water supply for hotels, apartment buildings and similar multi-unit structures, which controls the temperature T1 of water at the outlet of the water tank that circulates past the units and back to the tank, to make the actual temperature T1 close to a desired temperature DTEMP. The desired temperature at the tank outlet, DTEMP, is adjusted according to the measured temperature T3 of recirculating water prior to its reentry into the tank. In cold weather, when T3 decreases below a preset limit such as 105°F, indicating there is a considerable temperature drop along the pipeline before water reaches the last unit, the desired tank outlet temperature DTEMP is raised to more than it would otherwise be. As T3 increases back toward the limit such, as 105°F, the temperature DTEMP is lowered. The system therefore automatically adjusts for changes in temperature drop along the pipeline such as may be caused by seasonal or other environmental temperature changes or heavy demand for hot water.
590474
Pro-Temp Controls Inc.
Smart & Biggar
LandOfFree
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