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Posted by Heatpro on November 22, 2005 at 00:08:53:
In Reply to: Re: 3 wire stat with 75F limit posted by VY on November 21, 2005 at 23:31:53:
Right. You want your cake and to eat it too. The thermostat has to have stops for the temperatures, be for three-wire systems and be cheap too. The aforesaid comes close to what you asked; but it cost some money.
You can use an Accustat fixed temperature thermostat
with a 24 volt SPDT relay.
When the thermostat calls for heat, the normally open terminals close. When the heat is satisfied, the relay calls back to close the valve closing circuit.
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