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Posted by HeatPro on April 28, 2006 at 12:20:07:
In Reply to: adding pump delay posted by Dave on April 28, 2006 at 11:56:54:
The way you are explaining it, you have zone valves, a time delay that runs the pump against a closed zone valve won't do much for you. If you have circulators, then running the circulator to the zone off a boiler temperature sensor through a tank sensor could do that. You are looking for a time delay that senses all zones are closed so the one domestic zone can open to receive the extra boiler heat - quite complicated - the function of a System 2000 module.