[quote=“MullerBrau”][quote=“TeamTuna06”]MullerBrau: can you clarify the night light bulb’s purpose in your setup?
Awesome setup. Envious…very envious![/quote]The night light bulb merely generates a bit of heat (when turned on by the Johnson temp controller) which warms up the temp probe wire fom the AC unit. I pulled the probe out of the airflow and slipped it outside of the AC screen (faceplate). Without the light bulb, the AC unit will go no lower that its lowest set point of 62F.
Does that make sense? Maybe I should put a demo video on yotube???
EDIT: Look at the last two pictures on page one and see the temp probe attached to the light bulb. Also note the temperature that the AC unit thinks it is in the room. That should help.[/quote]
I thought I should add just a bit more. The reason Greg is doing it this way is because he is using a digital/remote Air Conditioner. Because of that he needs to have it powered on all the time and uses the temp controller to manage the light bulb. Hence, when the temp hits it’s upper limit in the room the bulb comes on, heats up the Air Conditioner sensor and causes it to run. Genius!!! With my application I used a analog/manual Air Conditioner so the settings remain static even after power loss so I use the temp controller to power the Air Conditioner on and off. I rerouted the Air Conditioner’s sensor that shuts it off @ 62F to the outside of the unit so it’s sensing the temp outside the Fermentation Box rather than inside. Without doing this it would shut off at 62F. By rerouting it I’m able to go much lower. I tested it at 32F and it worked fine. Haven’t tried any lower because, well, I don’t need it any lower. I hope this helps some. Cheers, and Happy Brewing!!!