does this thermostat require a 24 volt power supply, or can it run strictly from batter power ?
1704629
Require a power supply: No; Batteries: My book says "to provide back up power". Others have mentioned that the batteries don't last to long
1704630
The battery is a backup in case of power interruption. From a practical viewpoint you need a low voltage power supply.
2049778
According to the specifications power supply requirements are 12to 24volts DC/AC
1697601
this unit requires 240 volts, which requires running a dedicated circuit from electrical panel and a line voltage thermostat to control temperature. I strongly recommend that this only be installed by a qualified electrician.
999073
Answer is to be found in other answers. However, the electronic thermostat needs to be energized all of the time (not the case for a "manual" thermostat) and so two of the wires going to the electronic thermostat need to be connected to 240 VAC. The other two wires are to be connected to the heating element. Thus you must determine/separate from the wires available two wires that run to the circuit breaker (supplying 240 VAC) and two wires that go to the heating element. Sometimes, two heating elements are involved. In every case that I have seen, you will see the mentioned pairs of wires entering through separate holes in the back of the box. When wired as intended, one result of using the new electronic thermostat is that no voltage will be present at the heating element when it is off - not now the case. Invest in a very low cost multimeter to use to measure voltage and resistance.
424602
You will need an electrician to run power to it from the thermostat. Mine was a replacement, so I installed it myself using the existing power line.
1266133
Yes. It will work from 12v or 24v. Use a momentary switch or a rocker switch with it so you can turn it on and off.. or just hardwired it in and it will be on the whole time.
1565068
No. It does not require batteries. It uses the 24 volt power from the HVAC unit.
731280
We believe this uses low voltage , 24 V and a transformer that is tied directly to our security system. Hope this helps.
1205473
I bought this one and it does require a 12vdc input voltage. It then thermostatically controls a 12vdc device you have plugged into it.
1259264
This is a line voltage (110/220) thermostat. It won't work as replacement for a low voltage system.
519620
24 volt ac. Used to power doorbell or to create a common for a digital thermostat
383570
P.S. You can power it off the R & C terminals where your thermostat ties into your furnace if your thermostat is 24V.
229678
This is usually not an issue because the half of the kit that needs 24V goes next to your furnace - and it's easy to find the 24V there. If your furnace doesn't have any 24V (?) then no, you'll need a transformer.
37275
No it does not. This unit is powered from the source just like the Thermostat in your home which is usually 24 v ac. This unit is basically a switch with no electronic parts inside. It does not care if it is AC or DC. The Temp controls the on and off of the furnace. This is basically a temperature sensitive spring inside the thermostat. This is as basic as it gets. It works for sure.
92822
I would say yes. The papers that came with it said it was to be used with an AC voltage supply. I put it in an RV with 12 v dc supply and it works perfectly. This is a basic thermostat. I would get a programmable unit to put in my home if i were you. My opinion only.
758782
Sorry for the delayed response. I actually got the thermostat for my parents as a gift, but did do the setup for them. I haven't heard any complaints about power outrages causing a system reset.
697308
As others have said, it requires 12v DC. You'll need a power supply for operating it from household power.