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I have a Honeywell thermostat operating for a floor furnace with a 500 milllivolt powerpile which appears to have become nonfunctional. There are available replacement thermostats which operate with either 250 millivolts or 750 millivolts. Which of those would be a suitable replacement for my current thermostat, without doing damage to the unit or having to replace the existing thermopile?
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get the one for the highest voltage. typical thermopiles have an output of 600-750 millivolt. -
Thermopile systems
A thermopile should not be confused with a millivolt THERMOCOUPLE. The thermopile is a system of dissimilar wires that when, terminated in a junction and heated produce a DC voltage. A thermopile thermostat should not be used on a 24volt AC control system ONLY a thermopile output. Difference is the thermopile thermostat does NOT use a heating anticipator which is a resistance to the system. The thermopile thermostat is just a set of contacts that open and close according to temperature of the room.Comment
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