10-10-2008, 06:46 AM
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Re: DIY Thermostat
Quote:
Originally Posted by wonderfvl
Love the tutorial! But I'm confused on the relay. Is the relay normally open or normally closed? I'm assuming open....
and is this how it works?---> When the stat is adjusted to the desired temp the 24 volts from the stat is on and goes through the relay, the normally open relay closes and provides 120 vac current to the heat source. Once the desired temp is reached, the stat turns off the 24 vac to the relay. then the relay goes back to normally open state once it looses the 24 vac coil current and then the heat source is off. ???
Please help, I've everything except the relay.
Thanks!!!
Nels
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Thats exactly how it works. 
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