Electrical Question: My current wiring only has 4 wires but I understand I can use the fan wire and make it a common wire. It's simple wiring. For use with electric baseboards, convectors and fan forced heaters, this thermostat is a practical option. Any suggestions are greatly appreciated, and you can’t hurt my feelings or ego if you point out something easy that I am clearly missing :(). Becasuse i have these two heating units running on a same open space. It's economical, yet rugged. You could even attach duct work to it to vent more efficiently. Or Red to the thermostat R terminal which is shared with both the heating and cooling. Thermostat Wiring and Installation Advisory……….If you decide to install your own thermostat you do so at your own risk. A) Temperature sensor with a human set trip temperature point      Changes an impedance (lowers) to indicate when the set point occures B) The energy to operate the system is 24VAC from a small transformer. Khaled. Use the screwdriver to remove the cover of the thermostat. It's simple wiring. Pull the sub-base off the wall and wrap the wires around the pencil or pen. Additionally, there are state and federal laws that are explicit about properly disposing of hazardous waste, including products containing mercury. All these things are important to know before buying a new thermostat. In any case, be it gas or electric, the fan relay is usually delayed to turn “off” to give the blower time to get rid of the excess heat in the heat exchanger. or the transformer at the boiler? Step 8 Install the thermostat box cover, and use the screwdriver to set the thermostat so that the fan … I would like to install a new thermostat that is a WIFI unit. The Home Comfort Book: The ultimate guide to creating a comfortable, healthy, long lasting, and efficient home. Insert the wall anchors and push them hard with your thumb. Of course W1 would be low, W2 would be medium, and W3 would be high. It’s very difficult to get these wires pushed back flush so I can feel confident that the connections are proper. Finally, once you have made the thermostat selection you can proceed to the next step. I’m thinking I must be missing something obvious. Dual electric cooling fans have several benefits over single fans — Dual fans can pull (or push) more CFM between the two fans versus a single fan, and dual fan setups allow for more clearance for front of engine accessories. Click the image to the right for purchase options of the UV light to protect your family. If this is the case the only benefit you will get from a programmable thermostat or thermostats is at night. Connect the second wire to the heater wires, following the instructions that came with the heater. Often, I find that the only thing people know about their AC and Heating systems is how to turn the thermostat on and off. What does the old thermostat wiring mean? I do think I need to use a 24VAC transformer (Honeywell Aube Technologies RC840T-120 Electromechanical transformer with Built In Relay from amazon) to convert line voltage to 24v which is compatible with these newer Tstats but I am totally lost how the wiring should look like. C) The fan control is a small 24vAC relay that can open and close contact       to run a pump or fan that use 120VAC. (See our thermostat wiring color page for help). 30 (other red wire) needs constant 12-volt power from the battery. These components will energize the fan, heating, or cooling depending on the selection. Thank you in advance. Most two-wire thermostats wire have a red and white wire encased in a brown insulated coating. That is your heat anticipator. See our detailed instructions below. Blue – This is your common or “C” wire. After doing that, make sure the power is off by turning the thermostat to the on position. Undo the wires from the pencil or pen and run them through the center of the sub-base. I have a new York electric furnace and to wire it up for 220 volt I only see L1 and L2, that are the black and red wires. For example, if the Red wire is connected to W on the thermostat … A boiler with an air conditioner? Answer 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. My current wiring only has 4 wires but I understand I can use the fan wire and make it a common wire. Do you have an air conditioner with a gas furnace? I would love to help you however, without being there and looking at the system myself and for liability reasons I cannot. Just a gas furnace? That is why I say call the manufacturer or a professional to make sure this won’t (or will) be a problem and find a solution to fix that problem. When you are sure that it is level, tighten the screws. This electrical wiring question came from Christie in Phoenix, Arizona. Proper settings ensure you will get the best out of your heating system and your thermostats. The simplest setup for a heating system is a two-wire thermostat. These thermostats are available from most electric fan suppliers, as well as Summit Racing. 24 volts is the most common but in your case, it could be different. It is important in this step to have the proper drill bit size. The furnace also has a switch on it for heat or cool. Resource to color codes to make it easier for installation. For both the condensing unit and the air handler/furnace/or boiler. Thermostats act as the control hub of your heating and cooling system, giving you access and easy control from one central location. 9 years ago. Never reading any thermostat installation directions, they proceed to change the thermostat. These split systems include an air conditioner with a gas furnace, oil furnace, or electric furnace. It was replaced in the condenser rather than the air handler. Selecting the proper thermostat.If you are retired or if someone is at home during the day you likely do not need a programmable thermostat. The current control is a single push-button switch with 2 indicator lights. I've had a look at fancy, expensive thermostat controllers but just need the most basic, cheapest option for this. It uses a 40-Amp Electric Relay and Electric Fan Sensor. some thermostat wire diagrams at the end of the article. Other questions about a Honeywell thermostat, Honeywell thermostats, programmable Honeywell thermostats are found at the Honeywell Thermostat website. In one of the videos they push the wire into the receptable with one finger, and tighten easily. A relay kit, our part number CCFKRL, will include everything you need to properly wire up your electric cooling fans, with the exception of additional wiring needed to complete all of the circuits. thermostat wiring instructions are good for most low voltage room thermostats including a smart thermostat. Additionally, emergency switches do not always function. Importantly, turn the power off to the air conditioning and heating unit at the circuit breaker or the emergency cutoff switch. One for the cooling and one for the heating. My only last ditch idea, which I’m not crazy about, would be to cut a small square where the backplate goes (currently the round hole is exactly the size of the cord), with the hopes that having more room to push the wire around would help???? Drill the mounting holes you made for mounting the sub-base. For detailed wiring explanations, see our thermostat wiring colors chart or page. Run NM cable from the attic fan thermostat to the attic light. and what would I ask for? I have a separate boiler and AC unit. Wyze Thermostat was made to control low voltage (24V) heating systems only. Thanks. I already have power in the workshop, so that's all there already. How to wire a thermostat. Those that are most likely read some thermostat installation directions or had someone read the thermostats installation directions for them. I am trying to rewire a 5 wire Honeywell thermostat. I want to add a 5/2 programmable in line thermostat. Some are successful at changing the thermostat and some are not. Typical colors for such wiring would be green, black and white. Finally, cooling anticipators are often on the sub-base and are non-adjustable. Yellow to the thermostat Y terminal. A line-voltage thermostat is for a simple heater or cooler, and it has only one function: to turn the device on and off. Try pulling the wires a bit to see if there is more wire behind the wall. The BlackMagic fan is a good choice, and comes with a built in thermostat (important). Run a live circuit cable from the panel to the box and another cable from the box to the heater. For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 terminal. Round thermostat? There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. Four electrical wires: If the thermostat is turned all the way to the left, in the off position, it will not signal the heater to turn on. However, only if you are replacing a mechanical thermostat with another mechanical thermostat. You can save energy for your heating and cooling system by installing an energy saving 7 day programmable thermostat or a setback thermostat. I would like to know how to wire two heating Finally, factor this into your decision and if there is any doubt call a professional. It should have numbers ranging from 1.5 to .1. It is possible you could have two different transformers in that system so you would need a thermostat with an RC/RH termination in the thermostat. Connect the thermostat's “load” wires to the wires that run to the heater. Using the color code of the thermostat wires, attach each wire to their proper terminal. Now take the power wire from your fan and connect it to the wire that is going through the firewall. Connect the black wire from the fan to the red wire from the thermostat. How do you hook up a thermostat? An attic fan is an electric exhaust fan that mounts in your home's attic. Thanks so much,,. The white wire connects to the W terminal, the yellow wire connects to the Y terminal and the common wire is used with digital thermostats and is usually black or blue. I’ve used ones that you pushed the wire in, applied pressure to the end piece and it was locked in. Now easily tape the wires and butt connection to hold it in place. It really depends on how the system was installed and wired. Before you begin to install your new thermostat turn the power off. That way the house is at a comfortable temperature when you get out of bed. Or perhaps the wiring color combination was not available for the new installation. Not sure without looking at a wiring diagram of the system. The delay can be either a special relay, a sequencer, or through the electronics in the control board. If they still won't stay in place, tape them to the wall. I’d like to convert from the push-button switch to a thermostat, preferably a programmable but at least the “new round” Honeywell (not the digital). A large majority of homes today have an HVAC system containing a Furnace (Oil, Gas or Electric) and An A/C Unit. All other wires, except the common wire, controls a specific relay or contactor. Most of the time, there is some slack, and you can pull the wire out more. Additionally, make sure the heat anticipator is set properly. 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