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Posted by HeatPro on May 07, 2005 at 20:11:40:
In Reply to: Worcester 240 hot water problems posted by Ted Kirton on April 26, 2005 at 18:29:30:
As the heater gains more hours of use, it limes up and restricts flow, so it overheats. The liming and sticking of the diverter valve helps create an overheat condition. 1.5 bar (20 psig or so) is a low pressure minimum for operation, higher pressure would flow more water to counter the problem.
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