Just installed my CT100. Configured for a 5 wire system. RC, RH, G, Y and W. I have 24VAC bwt. the RC and W. Do I still need the C wire for power?
340542
C is needed if you want to power the device and use it as a repeater. Otherwise you'll be on battery.
1961642
Need the C wire for wifi. I had an electrician run a new thermostat wire so that I could do it. If you are the owner, you may be able to rerun it yourself. Mine went through the heat flashing and was compressed by a support post and my electrician had the tools to fish a new line.
619875
don't know why but if you want to use something like more than 700watt i recommended you use both of them, because 1 wire might get hot and burn, i just dont know why they don't give 4 gauge wire with this unite.
728796
It's been a while since I installed, but I think if you don't install the common wire you will have a battery operated thermostat. If you have the complete 24 volt circuit, (Common installed), batteries will be the backup, in case of AC power failure.
1294740
For a WiFi thermostat, the 24v pair of wires connect to C and RH (or R) according to this video. http://www.youtube.com/watch?v=8a_f2_iAW1U
1185078
I personally wouldn't use this particular kit for a system that size. The wire is CCA stranded. The kit shows for up to 1500 watt systems. That's about all I would use it for. Take a look some OFC stranded kits. Stinger makes a couple options. It does cost more but with a system that size it's certainly worth the expense.
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
2266789
Yes, wire to inside unit is included. #12 wire is sufficient for outside unit power, it can handle 20 amps. Some local codes require a fourth white (neutral) wire in 230 volt appliances. It acts as a backup ground and safer should something happen to the copper ground wire.
770474
I see three other answers to your question. They are correct, but something else I would like to mention is the high surge current of motors, which may exceed the continuous rated power of 2000 watts. Something to keep in mind when choosing wire size, fuses, etc.
1191906
I didn't have a C wire when I installed my thermostat. From what I can figure, the C wire is used for power, and the batteries will kick in when the power goes out. My previous thermostat was programmable with batteries. The batteries lasted a long time in that thermostat.You can set the temperature range where you want and leave it. For some reason, my Vera 3 set up 3 thermostats. 2 are like ghost thermostats, and 1 is the real one. But, I can access and control that thermostat from anywhere. I also set the poling time lower so that it checks the temperature on the thermostat more often. I think I set it at 1/2 hour. I didn't have a C wire when I installed my thermostat. From what I can figure, the C wire is used for power, and the batteries will kick in when the power goes out. My previous thermostat was programmable with batteries. The batteries lasted a long time in that thermostat.You can set the temperature range where you want and leave it. For some reason, my Vera 3 set up 3 thermostats. 2 are like ghost thermostats, and 1 is the real one. But, I can access and control that thermostat from anywhere. I also set the poling time lower so that it checks the temperature on the thermostat more... » Read More I didn't have a C wire when I installed my thermostat. From what I can figure, the C wire is used for power, and the batteries will kick in when the power goes out. My previous thermostat was programmable with batteries. The batteries lasted a long time in that thermostat.You can set the temperature range where you want and leave it. For some reason, my Vera 3 set up 3 thermostats. 2 are like ghost thermostats, and 1 is the real one. But, I can access and control that thermostat from anywhere. I also set the poling time lower so that it checks the temperature on the thermostat more often. I think I set it at 1/2 hour. « Show Less
138271
This does not need a C wire. It uses two AA batteries. Honeywell (and others such as Trane) use a C wire on models that use WiFi or voice recognition or Z-wave so they can have a 24V connection. All thermostats use low voltage from the other connectors and typically use the batteries as a backup when there's no C wire. For this thermostat, you can take it off the wall, hold it in your hands and program it. You can't do that on models that don't use batteries. However, those other models can be programmed from a computer or phone app so it's less necessary.
789649
No question is a dumb question. When in doubt, just ask, that is all. YES, you can tap into your existing 12 gauge wire without any problem. 12 gauge can carry lot of current, lot than you need for your 12 volt system and ,like you said, you are only at 52 watts -you can easily add more if you want. I am at 110 watts, no issues what so ever for the last 2 years. So relax and do what you want to do: add one more lights. Also look at your transformer, check it is designed for how many watts. They go anywhere from 50 watts to upward of 200 watts
1264983
I suggest you download the manual and wire it per the instructions in the manual. Important! The Wi-Fi thermostat requires a C wire to operate. The C, or common, wirebrings 24 VAC power to the thermostat. Many older mechanical or battery operatedthermostats do not require a C wire. If you don't have a C wire, try:* Looking for an unused wire that is pushed into the wall. Connect that wire to C andcheck that it is connected to the 24 VAC common at your heating/cooling system.Note: Not all heating/cooling systems label the 24 VAC common C. Check your systemmanual or contact the manufacturer to find out which terminal is the 24 VAC common.Or, call a qualify service company and have them solve the problem. I suggest you download the manual and wire it per the instructions in the manual. Important! The Wi-Fi thermostat requires a C wire to operate. The C, or common, wirebrings 24 VAC power to the thermostat. Many older mechanical or battery operatedthermostats do not require a C wire. If you don't have a C wire, try:* Looking for an unused wire that is pushed into the wall. Connect that wire to C andcheck that it is connected to the 24 VAC common at your heating/cooling system.Note: Not all heating/cooling systems label the 24 VAC common C. Check your... » Read More I suggest you download the manual and wire it per the instructions in the manual. Important! The Wi-Fi thermostat requires a C wire to operate. The C, or common, wirebrings 24 VAC power to the thermostat. Many older mechanical or battery operatedthermostats do not require a C wire. If you don't have a C wire, try:* Looking for an unused wire that is pushed into the wall. Connect that wire to C andcheck that it is connected to the 24 VAC common at your heating/cooling system.Note: Not all heating/cooling systems label the 24 VAC common C. Check your systemmanual or contact the manufacturer to find out which terminal is the 24 VAC common.Or, call a qualify service company and have them solve the problem. « Show Less
1211729
YOu really should use a 2500W model. The recommended power of the transformer should be 1.5 time the wattage of the appliance. Be careful with these transformers as they are wired incorrectly and could be dangerous if a fault occurs in your appliance. The manufacturers have wired the fuse and switch onto the neutral wire instead of the live wire. This means if the fuse blows due to a fault, the appliance plugged into it will still be live. The manufacturer also states that these are CE approved. There is now way they would be CE approved with this wiring. I am guessing that this is a false declaration of approval printed on the units by the Chinese manufacturer so as to look the part. YOu really should use a 2500W model. The recommended power of the transformer should be 1.5 time the wattage of the appliance. Be careful with these transformers as they are wired incorrectly and could be dangerous if a fault occurs in your appliance. The manufacturers have wired the fuse and switch onto the neutral wire instead of the live wire. This means if the fuse blows due to a fault, the appliance plugged into it will still be live. The manufacturer also states that these are CE approved. There is now way they would be CE approved with this wiring. I am guessing that this is a false... » Read More YOu really should use a 2500W model. The recommended power of the transformer should be 1.5 time the wattage of the appliance. Be careful with these transformers as they are wired incorrectly and could be dangerous if a fault occurs in your appliance. The manufacturers have wired the fuse and switch onto the neutral wire instead of the live wire. This means if the fuse blows due to a fault, the appliance plugged into it will still be live. The manufacturer also states that these are CE approved. There is now way they would be CE approved with this wiring. I am guessing that this is a false declaration of approval printed on the units by the Chinese manufacturer so as to look the part. « Show Less
1290663
No, this thermostat requires constant power - you will need a 24V "common" wire connected to the thermostat's "C" terminal. You would either need to run additional wires from your furnace to this thermostat, or there is an adapter you may be able to install into your current setup, but I'm not sure if you can make it work with only two wires. Either way you will need to modify your current configuration to include the common wire. See http://www.amazon.com/Venstar-Add-A-Wire-Wire-Adapter/dp/B0013LVDQA
737136
Absolutely, the red wire 24v cannot contact the blue common wire or you'll blow your 3-5a fuse in your air handler as well as a shock. Also some miscreant installer may not have used the correct color wire. I install hvac systems btw.
1336121
It does not come with a C-wire transformer. If you are sure you don't have power coming from you AC (mine did), then you will need a transformer. The wifi module slides into the back of the unit, and is why they say it "includes 1 ..."