We want use the ADC thermostat in a demo where we have a panel, a few accessories, the t-stat, and a small computer fan.
T-stats normally control 24V AC. I wonder if I could use batteries, and get the unit to control 12VDC? It would make running the fan a lot easier.
Do you think the thermostat could handle the amperage of a small computer fan or would I need to add another relay after the T-Stat?
My plan is to use Rc/Rh, and G
Where do the batteries come in? Are you trying to run the whole thing off of batteries or just specific components?
Converting to DC for the fan is the easy part. Altronix has plenty of options to convert 24VAC to to DC 12V or 5V, so you could use pretty much whatever low voltage fan you want.
I think a small fan would probably run fine through the thermostat, but I haven't tried it. Is it the Smart Thermostat? That one says 1A load max.
One other note: you are probably going to have to connect 24VAC to C and Rh/Rc to get the thermostat to power up. I actually have had to use external power supplies for all my thermostats, because I have no common wires run, unfortunately, so I've done it three times. Just connecting 24VAC to the Rh/Rc and G terminals won't do it (at least not that I've tried).
Yes Smart Thermostat
The unit holds 4 AA batteries and the directions say the unit can be powered by the batteries or 24V AC. Now that I think about it. Maybe the batteries only do backup or allow you program without a transformer?
Since the demo is portable, we would put batteries in it.
I just want to trigger the thermostat via phone and have a visual of it turning on, hence the small fan. My concern was converting the 24VAC to DC because a quick google showed more expensive options.
So a 24V ac power supply, the Altronix VR1 and a 12V fan should do it.
Thanks, helpful info
The batteries on that thermostat provide total device power if no C wire is present. If 24 VAC is present, the batteries do nothing. If 24 VAC is not present, the device does everything it would if the C wire was there.
Ask questions and get answers to your physical security questions from IPVM team members and fellow subscribers.
