Single Pole No "Off" Feature: Two electrical wires If the thermostat is set to 40 degrees, as soon as the temperature in the room drops below 40 degrees, it will signal the heater to turn on. Finally, the transformer is commonly installed in the air handler. Use this option to replace virtually any two-wire or four-wire line voltage wall-mounted electric heating thermostat. All other wires, except the common wire, controls a specific relay or contactor. This additional terminal is labeled ‘G’ in the thermostat. However, I do not know if this would be proper for your situation because of how the 3 stage thermostat will work. If not, what tells the air handler fan to run in a split system with gas heat? And not just a dial on the wall that adjusts the temperature when they are not comfortable. This electrical wiring question came from Christie in Phoenix, Arizona. It must be level, or the mercury switch will not keep the proper temperature settings in the house. (and more about thermostats, thermostat wire, and installing a new thermostat). Whether it is with your thermostat or HVAC system. This wire will go to the G terminal on your new thermostat. These are the four wires that you need to control the heat, cooling, and the blower or fan. Next, get the new sub-base and compare it to the old one. You probably want to do this now before you proceed further. If the temperature keeps falling below the set point then W2 would kick on and the same between W2 and W3. The standard setup involves a low-voltage loop (24V or less) through the thermostat, so that when the thermostat switch closes it activates a relay which in turn controls the circuit which powers the actual heating/cooling/fan/whatever There probably are self-contained plug-in thermostats, but I couldn't tell ya where to get one without websearching... and you can do that as easily as I could. If you can build it for less than $22 then you have a well stocked junk box. look at this image and see the little holes on the pliers? You can use a level to do this. The thermostat interrupts the circuit like a wall switch interrupts a light circuit. Gas Heating Troubleshooting and Repair Index, Questions You Need To Answer Before Changing the Thermostat, How to Wire a Thermostat – Selecting the Proper Tstat, Before You Begin Replacing the Old Thermostat, Steps and Procedures for Installing the new Thermostat, How to Wire a Thermostat – The Colors and Terminals, How to Wire a Thermostat – Removing Wires, The Colors and Terminals on the New Tstat, How to Wire a Thermostat – Thermostat Wiring Diagram, UVC Light to Kill Viruses and Other Airborne Harmful Things that Affect Health, Successful Thermostat Installation Advice Article, Helpful Page to help you select the right thermostat, HVAC Products Containing Mercury and Proper Disposal,, Blank Display Problem – Screen Disappeared, Honeywell Heat Pump Thermostat Troubleshooting, How Can I Tell 1 or 2 Transformers for Heating Cooling System, How to Wire an Air Conditioner for Control – 5 Wires, Thermostat Wiring Instructions not Matching New, What Temperature Should I Set My Programmable To, Wiring a Programmable for Geothermal Heat Pump, the most common trouble call by service and repair HVAC companies, about thermostat wire with a resource for more information, the best advice for changing your thermostat, the most common mistakes made by DIY thermostat changers. Thermostats for electric-baseboard heaters operate at the same voltage as the heater—usually 240 volts. Additionally, If you have a multi-zone system, a high-efficiency heat pump or even just a heat pump, a regular split-system AC and a boiler for heat (and you have one thermostat), or an Apollo-based system (hot water heated in a water heater) with a split AC system……. The delay can be either a special relay, a sequencer, or through the electronics in the control board. The forums are retiring in 2021 and are now closed for new topics and comments. Start with taking both of the positive wires from the fans and run it to the yellow wires on each relay. Competency is important especially in a matter such as this. Guide to line voltage thermostats 120V or 240V room thermostats for electric heat, fan heaters, radiant floor heat, convector heaters. Copyright© 2020 |. Using the Blue Female Connector, Blue Wire Tap Connector and Wire provided, attach the remaining Thermostat Switch Lead to a Positive (+) switched ignition source. A toggle switch can be wired into the system to manually override the cycling of the fan. No, the thermostat does not work with electric baseboard heating, which is a high voltage (120V or 240V) heating system. some thermostat wire diagrams at the end of the article. When the thermostat for the third zone is turned up the zone does get heat. The red wire is the source hot wire from the transformer. The thermostat may need to be configured to your heating system. If you have a phone number for the manufacturer of the furnace I would call them and ask them about it. For detailed wiring explanations, see our thermostat wiring colors chart or page. The bit should match the size of the wall anchors you have. Using a smart thermostat we want to be able to toggle the fan heater to come on and off. Additionally, emergency switches do not always function. Some are successful at changing the thermostat and some are not. W1 would kick on when the temperature need to turn to satisfy the set point. The manufacturer did not install the transformer in the condenser. Approximately 1/16th of an inch on the lip of the anchor will remain to stick out of the hole. The problem with the staging thermostat is that W1 would still be energized when W2 calls and your controller may not allow that. A small paper bag and some masking tape. Clean hands (don’t do a great job changing the thermostat and leave all those prints all over the wall). First you need to figure out if it is line voltage (120+) or control voltage (24V). If you cannot get it to work correctly then it is best to call an HVAC tech who is good with control wiring. Refer to our pages about heat pump wiring on how to wire a heat pump thermostat or our thermostat wiring color page to see the additional control points for your thermostat. Insert the wall anchors and push them hard with your thumb. It covers the same control or color features as the 5-Wire thermostat wiring above except for heat only. You can pick up multiple bundled thermostat wire at your local hardware store. An attic fan is an electric exhaust fan that mounts in your home's attic. The thermostat will open or close (depending on the model) when a temperature is reached, allowing power to flow through the fan. It was replaced in the condenser rather than the air handler. Setting the heat anticipator is important for your heating system. If it is a mechanical thermostat, there should be a little adjuster tab in the center of it. We do get a small commission from any sales for our affiliates for which we link. Furthermore, an improperly set anticipator will cause your furnace or heater to run improperly. I have an electric fan forced air heater at 2000 watts powered by 240 volt wiring, hot/hot. It is also possible you only have one thermostat. Also how would I go about instaling a thermostat in the greenhouse. Furthermore, here is a list of possible thermostat wiring combinations beginning with the most common first: This is the most common and covers many central air conditioners with an air handler or gas furnace. And the possibility exists that the thermostat will fall off the wall. These controls can be very complex. Finally, these newer thermostats allow you to have a smart home by offering precise temperature control. Here's how I replaced it with a digital thermostat quickly and easily. Finally, they will be happy to accept your old thermostat and dispose of it properly. Just a gas furnace? 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