Is the thermostate made for 2 or 3 wire installation?
267268
I used it for a two wire installation for my hot water boiler. Easy to install. Instructions are thorough.
267269
I never received the item, I thought you ran out of them, I will have check to see if If I paid for it and how it was shipped,thanks Joan Purdy!
661456
The one I have is 2 pads on one wire and another 2 pads on another wire. There are 2 spots in the unit to plug in 2 wires. One to the left side and one to the right side Hope this helps
292764
Yes it is. It has to be calibrated (instruction s includede) and will operate 2 AC and 2 furnace s. If you have 5 button unit already you can use this. If you have more or less buttons you don't want this. If your looking at new install you don't want it either.
761772
I have two live wires and two dead wires does the hot wires go to the top or bottom of thr thermostat
755288
As the wires are sealed I did not pay close attention. However when installing it, I do believe that it was a 4 wire plug. Hope that helps
161537
It depends on your existing thermostat. This unit requires 5 wires, with the 5th blue wire requiring 24V. If you have a modern 5 wire thermostat, it should work by hooking it up as you say. If you are currently hooked up to only 4 wires, I suggest getting an HVAC person to help out.
1567993
No, not a problem at all. The thermostat has inputs (places for wires) for heat, fan, AC, heat pumps and sensors. See the install manual here: http://www.venstar.com/Support/Manuals/T5800ManualRev5b.pdf
1212411
What they didn't say was that there is a 4 wire and 3 wire thermostat. That said, just turn the thermostat down to shut off the heat.
1789634
Jeff is correct. Only two wires (conductors) are needed. If you have thermostat wire with more than two conductors, no problem, just use two of them and ignore the rest.
2064235
It is wires, and it only comes with 2 but you can buy 2 more on here for cheaper.
302219
i dont think so !this thermostat creats its own currant milovolt through the pilot thermocoupler !. and it only uses 2 wires, it sounds like you need a outside power source for the third wire
991961
what jumper? Look at the wiring diagrams of your thermostat. The power to the thermostat is only to be used if your furnace/thermostat connection doesn't use a 24vac power source. My thermostat needed the extra and I was able to to simply determine that the two wires from the power supply should be on The 3M-50 can be externally powered with a power source rated from 12V to 24V, AC or DC, at connect to the C and RH terminals (no polarity). Look at your thermostat wiring diagram to determine the correct connections. My system is very happy with this arrangement, but be careful not to mis-wire your connections. If you cannot find the correct placement, I recommend calling to your thermostat or furnace manufacturer to be sure of the placement, most 'high-efficiency' units are very computer oriented and please do not risk damage to the control unit on your furnace by mis-wiring. Dee
2223213
Just got this yesterday and it has 4 wires. Just like the one off my 2003 tundra.The O2 sensor is the one with 2 wires. That one is also about 50 bucks
302302
I have baseboard heat and it works just fine. Yes, it is a two wire system. Hope this helps.
2000357
I do not have the installation instructions handy, but YES it does work with a 2 wire system. However I am speaking of ONLY with a gas fired furnace / heater. That is all I have it hooked up to. It works very well. As I remember, for a two wire installation you jumper two of the terminals that are indicated in the install sheet. You hook ONE of your wires to this junction. You hook up your other wire to whichever terminal is indicated. If you order this you will get complete instructions. Is this one you are ordering OR do you already have a used one you want to utilize?
1368889
it is a 3 wire and for heater/furnace only. you need to jump up to a 5 wire if you have air conditioning as well..... Google told me to tell you that.
398608
I know this is an old question, but two people answered Yes and that is not correct. I bought two of these units (for a multi-unit property) and my thermostat wire bundle only had 2 wires- red and white. This thermostat requires a C (Common) wire for continuous power, else it will run off the batteries and they will die every two weeks. I had an electrician run a new line of 5 wire cable and pulled out the 2 wire run. If you buy this thermostat, you need 3 wires for heat only, or 5 wires if you have heat and a/c.. either way, you need a C wire for continuous power.