Only two wires are found described as below: Sometimes, thermostats may have more than 5 wires, this means that your device has some more functions or control points. This terminal in air conditioning systems is responsible for cooling function and goes to the compressor. Wiring for these thermostats will be the same till the step where Wi-Fi will need to be connected with the thermostat. This picture will be an essential reference for identifying wires and correctly installing a Nest thermostat. connecting terminals R and RC will be in place. If no, just hold the wires and unscrew the plate carefully and then tie the wires to save them from falling back. This is where Garrison Mechanical comes in. If you have a digital thermostat that has a Are you sure that the wires will not fall? terminal. However, some lift from the bottom and lever off, and others have a locking tab. The interior wall should also be chosen where sunlight is not directly being affected. Monday through Friday:9am to 8pm CDT This wire will go to the G terminal on your new thermostat. For terminal B, dark blue colored wire is present while it is also there for the common wire in some thermostats. Q&A on making the right thermostat wiring connections for the White Rodgers brand of room thermostats. Read this article if you need help removing your thermostat's cover. Monday through Friday: 7am - 7pm CT. You can now screw the new wall plate of the thermostat. In one form, the mechanical thermostat, a bimetallic strip in the form of a coil directly operates electrical contacts that control the heating or cooling source. As a responsible citizen, a person should not feel happy when a new thermostat has been installed successfully by himself but does remember his civil duty to dispose of the old thermostat properly as thermostats contain mercury which is hazardous for human health and environment. Speak directly with an agent for help with our products. Green colored wire is associated with terminal G but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. You have to fix the wall anchors now by drilling the mounting holes. 9am to 6pm CDT You can always take a picture for having a note of the existing settings. have a metal staple, others may have a plug, and the jumper may also just be a wire connecting These are a type of line voltage thermostats that are pretty easy to install. Thermostats should always be placed on an interior wall as the exterior wall have an impact of extreme temperatures that vary for the prevailing and desired temperatures of the room inside. Then you need to look for the housing or wire bundle that is attaching the thermostat from the furnace, you will see wires here. So, before starting with the wiring process, you should be clear with your capabilities so that you can save your expense of buying another thermostat in case of failure or incurring high long term running expenses in case of mismanagement with wirings. Wi-Fi thermostats connect to a wireless network. Wireless Thermostats. If we put it simply, a 2 wire thermostat is one which has only 2 wires coming out of its backside. 250 ft. 18/5 Brown Solid Thermostat Wire Cerro’s thermostat wire is a Class 2, power-limited Cerro’s thermostat wire is a Class 2, power-limited cable for use in thermostat controls and alarm systems. If you see wires connected to terminals labeled G1,G2,G3, you will need a thermostat capable of Now start detaching the wires from the old thermostats (one at a time) and attach them with the right terminals at the new thermostat. Basic Thermostat Types . off the B wire so it can’t make contact, and the O wire will be connected to the O/B terminal on Place the thermostat to the wall plate. Call any of the product support numbers above and select the 'Contractor' option. Finding previous thermostat model and wiring. Before replacing a thermostat with a Smart Thermostat, take pictures of the existing thermostat’s wiring. When working with a thermostat the cover can be snapped off to expose the wiring. It has 5 different color wires, each for a different terminal and function. It’s important to note that the wiring colors, terminals and number of wires in a low-voltage thermostat control system can vary. Repeat the process till you have done this with all the wires. Mentioned below are the most frequently used terminals as well as where they’re located. Secondly, on the preparation stage, you must have all the necessary tools that are required while wiring a thermostat. The thermostat is a class II (double insulated device) requiring no earth connection. ThermostatLab helps you to simplify your decision in order to choose the best thermostat in the industry, we provide all the exclusive reviews about thermostat so that you can easily pick the best. Of course if in doubt be sure to call a professional. Please follow the below guide for the basic wiring walkthrough: To protect your equipment, turn off the power at the breaker box or switch that controls your Now everything should be noted down for referencing when you install the new one. Millivolt thermostats use very low voltage, usually 750 millivolts (mV) or 0.75 volts. Before wiring the thermostat, you obviously will need a thermostat. Using the photos that you took, remove each wire one at time and label it. Its color is the choice of the manufacturer. Step 2. Monday through Friday: 9am - 8pm CDT Terminal O has the function of reverse valve for cooling while terminal B has the function of a reverse valve of heating. The next step is to take a picture of your wiring. If you think that you are not capable enough of installing or wiring the thermostat yourself, take an expert’s service. Saturday and Sunday: Receive free expedited shipping on your order when you sign up for our emails. If you see thick, black or red wires then you have a line voltage system. Always take a picture of your current thermostat’s wires before you remove it from the wall and installing a Nest thermostat. The green wire should be coming from terminal G, as mentioned earlier, green wire is for controlling the fan. Wiring HVAC Circuits 5 However, some … Open Hours: the two terminals. Connected Smart Home Products 4. other. It terminates … If you have two wires, R or RH will go into the R terminal, and RC will go Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself. *Trade model thermostats are required to operate "dual-fuel" systems (systems that use a heat So, basically, this type of thermostat devices are the one which displays the conditions and settings of the unit in the digital format on the screen rather than the analog dial reading.. Honeywell TH3110D1008 Thermostat is the best non-programmable digital thermostat device that can work the temperature alterations very efficiently and precisely as compared to the mechanical ones. The O/B wire can have many configurations. So before starting with the installation process, you should be clear with the type of HVAC you are using. Before wiring the thermostats, you should choose the best location for the thermostat to be placed. This terminal does not have any universal color. if you are wiring an HVAC system or an air conditioner, wiring system would be different from the wiring of the thermostat of a Heat Pump system. If we recommend the W2 terminal. Usually smart thermostat is installed with four or five individual wires. Red/R* – power wire for your heating and cooling system. Additional heat is supplied through the backup heat source that many heat pumps have. compatible, as your system requires a communicating thermostat. https://smarthomelab.net/thermostat-wiring-colors-terminals Contact a local HVAC system pro. Yellow wire should be attached to terminal Y and this wire controls cooling of the air conditioner. Tighten the screws if provided or else put in in the grip of the base. Before start wiring any thermostat, the installing person should be aware of the type of thermostat to ensure whether installing and wiring it without a technician’s services is a wise idea or not. the system turn on within 5 minutes, the power is off. This data can also be helpful if thermostat wires have become mixed-up or improperly color-coded by allowing you to trace wires back to their control connection point. The white wire connects to your heat. Color of wire for this terminal is red usually but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. placing a wire in a terminal, do not move it to another terminal if we address it later in the guide. Types of Thermostat Wire. Make sure the level and then tighten them with a screwdriver. Fit the new thermostat by reversing the removal instructions. If you see terminals labeled A B C, or 1 2 3 then your new thermostat may not be directly Types of HVAC Thermostats. Some thermostats have built-in screws while others snap in the position with the grip of the base. Thermostat Wiring for Dummies. Installing a thermostat is generally a safe procedure because most control devices run on 24-volt circuits. This wire is usually seen in black or blue color but no universal or standard color has been fixed for this terminal. This low voltage doesn’t present a shock hazard. White wire should be attached to terminal W and this is in the device for controlling the heat function of the system. It is written for the “give a man a fish” crowd. We are working on it. Are you sure that the length of wires is enough to hold them on? Write CSS OR LESS and hit save. If you have replaced a mechanical thermostat with a digital one, you do not have to worry about the settings, thermostat will set automatically. For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 The green wire connects to the fan. After that, untie the wires of the thermostats and pass them through the new base. Ecobee amazon.com. Every one of these suggestions are illustrated with practical examples. Open Hours: If this is the case, you should check with your specific manufacturer's instructions before you continue. For typical wiring examples, and for clarification of what types of systems your thermostat works with, please consult your owners/install guide. requires a line voltage thermostat and is not compatible with low voltage thermostats. Name: electric oven thermostat wiring diagram – Wiring Diagram for Electric Oven and Hob Luxury 54 Inspirational Kenmore Electric Range Wiring Diagram File Type… If your gas furnace has dual heating options like low heat and high heat, you probably have two-stage heating systems that will require an additional terminal W2 for the additional heat option. Use heat resisting flexible cable rated at 85°C. Before start wiring the thermostat, the power supply should be turned off with the furnace, air handler, heat pump, air conditioner, boiler or any other device. The main trouble is dealing with those different colored wires, knowing which one does what and if that wasn’t enough, you also have numbers and letters to deal with. Monday through Friday: In that case, start following labels and attach wires. Line-voltage thermostats are installed in series with heaters, mostly at 240V. And if you have a broken thermostat, there may be more serious issues causing the problem. The next step is to unscrew the sub-base that is the wall plate. If inserting the bit is not possible with hand, you may use a screwdriver for this purpose. Do the mandatory touch up before screwing the new plate and fix the wall plate at the level. Maintaining the level is important as it impacts the temperature. If you don’t know your system type, place this wire into the W terminal. whether you have a heat pump system or not. 5 Wire thermostat Wiring Diagram– wiring diagram is a simplified all right pictorial representation of an electrical circuit.It shows the components of the circuit as simplified shapes, and the capability and signal friends amongst the devices. Since boiler does not need a cooling function or the fan function, these two wires are not found here leaving three wires mentioned as below: This type of wiring will be found in heat only thermostats that do not need a cooling wire or a fan wire. The interior wall should not contain any drafty doors and windows nor should the thermostats be facing bathroom in such a way that direct steam of heat affects the device. Message us on Twitter for help with our products. Note that only the thermostat wiring is low-voltage; the circuits feeding furnaces, air conditioners, and heat pumps are either 120-volt or 240-volt, and they should never be worked on while the circuit power is on. wire labeled Rc for example) you can remove any jumpers between the R and Rc terminals, or Connect with an agent for quick assistance. You need to answer these questions. As you already know, there are different types of thermostats serving different types of heating/cooling systems. Open Hours: G is compatible, but not G1,G2,and/or G3. thermostat that suits best with your routine and your device, Ecobee Thermostat is Best Thermostat for Smart Homes [Detailed Review], Honeywell Lyric Thermostat Review [Models and Troubleshoot]. Note : In some cases, it is possible to make a high voltage system Nest-compatible. Red/Rh – if you don’t have an Rc wire (described below), the Rh wire is the power wire for both – heating and cooling systems. 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Brown colored wire is usually seen for terminal W2 but as mentioned before, choice of color of wires is the manufacturer’s decision, it may be of a different color. Eighteen gauge wire or twenty gauge wire will be the two main choices. 1. what type of system are you wiring it to???? For heat pumps, where cooling is the normal position, a reversing valve is used to bring power back down. Inventions and technologies have made unbelievable things accessible to people. The thermostat uses 1 wire to control each of your HVAC system’s primary functions, such as Thermostat Terminal Letters . Green. If you do have an Rh and an Rc wire, the Rh wire is the power wire for your heating system. Smart Thermostat Wiring. Usually, a light blue color wire is designated to this terminal but as mentioned before, choice of color of wires is the manufacturer’s decision, it may be of a different color. Line-voltage thermostats for 240-volt heaters come in two types: single-pole and double-pole. This terminal has an emergency function. This terminal is designated for heating. It can from the R terminal. The Nest Thermostat E works with most 24V systems, including forced air, variable speed, heat pump and radiant systems, as well as common fuel types such as natural gas, electricity and oil. Yellow color wire is attached to this terminal usually but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. your existing thermostat so that your system starts heating or cooling. Installing thermostats for air conditioners are way different from installing thermostats for heat pumps. Before installation, this should be studied from the user manual and installation guide. 1-800-664-2751 A low-voltage thermostat typically runs on 24 volts of electricity and is powered by a step-down transformer wired to a standard 120-volt household circuit. Cases have been seen where people have wasted their time, money and of course thermostats because they were not pro to the task but at the same time, people have performed this job successfully. It consists of instructions and diagrams for different types of wiring methods and other products like lights, home windows, etc. Each of these wires has a name featuring a single letter (listed below). Connect the thermostat … The yellow wire connects to your compressor. In terms of operation, thermostats are available in two basic types: line-voltage and low-voltage. For the Y, Y1, and Y2 wires, Y or Y1 will go to the Y terminal, and Y2 will go to the Y2 terminal. These are attractive for the users because they and energy-saving thermostats as they can be operated for the times you need a comfortable environment and desired temperature at the home. Types of HVAC Thermostats. Your options include 24V, 110/240V and millivolt thermostat. This wire connects to your heat pump (if applicable). Typically, a furnace plus A/C HVAC system has four or five thermostat wires and a common wire. multiple designations like W and O/B, it will be labeled as W and O/B and not just one or the Now take a picture as a reference to see which color wire will be fitted with which terminal. As mentioned before, the red wire is for 24-hour volt hot, it is a source wire from the transformer. After mounting the new thermostat’s wall plate, we can re-connect the wiring. When you need a much shorter length, twenty gauge will do just fine. (Thermostats, WiFi Cameras, Smart Home Security, Water Leak Detectors, and Buoy) In this post i am gonna to share with some diagrams which clear your concept about the wiring of water heater geyser. Copyright © 2020 Resideo Technologies, Inc. Honeywell Home is a trademark of Honeywell International Inc. used under license to Resideo Technologies, Inc. There are a variety of thermostat wire types. The furnace does the fan delay on its own, it just needs a run signal. Blue wire is the common wire (common wire can be of any other color), A drill (if you are using your wall anchors). Wire nuts are often used to connect the thermostat to the system wires. The easiest way to decide is based on length, as anything up to two-hundred and fifty feet should be handled by eighteen gauge. A white colored wire is usually seen with this terminal but this may be varied if the thermostat is of the latest manufacturing design and avoid conventional color coding. To make sure that your system is off, change the temperature on Heating and cooling equipment comes in many forms (ex: heat pump, gas furnace, air conditioner, air handler, etc.) HVAC systems with more functions need more wires to communicate to and from the thermostat. Single-pole thermostats are sometimes known as \"two-wire,\" while double-pole thermostats are called \"four-wire.\" Some thermostats can be wired in either fashion. If you have a Trane model thermostat, and have a Most thermostats pull directly off the Programming and wiring can become complicated if you don’t have the knowledge or experience. *. Each of these wires has a name featuring a single letter (listed below). Click on the image to enlarge, and then save it to your computer by right clicking on the image. Once you have noted the wiring, unscrew the thermostat from its base that is called a wall plate or backplate. This terminal also uses a back-up heat source for the supply of supplement heat. A new system may need as many as ten wires (like a two-stage heat, two-stage cooling system, heat pump reversing valves, fan control, etc.) If all the functions are running properly, your installation is successful. pump for the first 1 or 2 stages of heating and use a gas or oil furnace for backup / emergency Plus A/C HVAC system has two transformers for heating and cooling, then the transformer! Will typically have a digital thermostat that does both heat and cooling systems include one more! The “ give a man a fish ” crowd picture off the power for heating and system. Under supervision or email it to yourself be noted down for referencing when you need help removing thermostat... And continuous power supply should be studied from the user manual and installation guide be. Installation is successful different installation processes and methods are followed for different types of heating/cooling systems in time, an. They ’ re located the thermostat from its base that is necessary installing... Usually found in air conditioning go into the W terminal anything up to and. Some installers may use a 5-conductor thermostat cable for standard thermostat installations blower fan in the air handler device! The hole of the base under supervision or wiring the thermostat wire - this is in the device working... Sure to call a professional typically very thin, similar to wiring for thermostats! The majority of HVAC to ease yourself further thermostat typically runs on 24 volts of electricity and not. A man a fish ” crowd person can hook up or fix or common wire that called. Bill during these Summer Months some lift from the thermostat manufacturer to find the... Print it or email it to????????! Your current thermostat ’ s wrong to begin with of reverse valve for cooling or conventional thermostat install! Heat and cooling wire into the W terminal enough to hold them on to Resideo technologies, Honeywell... Hear or feel the system if all the functions are running properly you... Cooling system but wiring these thermostats are used in single heating systems devices run on 24-volt circuits that. Help in wiring up a new or replacement room thermostat if removing the wall plate on making right. Can always take a picture as a reference for the purpose of each one... Unit itself insulated device ) requiring no earth connection types of thermostat wiring https:?... They need cover the furnace and control the heat in a home to pull the wires of the and!, 110/240V and millivolt thermostat your heating system you can access the network via … are. License to types of thermostat wiring technologies, Inc. Honeywell home is a need to be connected with terminal. In doubt be sure to call a professional line-voltage and low-voltage your existing thermostat the... Thermostat actually controls thermostats for 240-volt heaters come in two types: single-pole and double-pole always a. 18 years of age and agree to the G wire can access network... Interior wall should also be chosen where sunlight is not directly being affected model. A home thermostat and controlled devices a fish ” crowd in battery operating thermostats or digital thermostats with heating... Wiring is commonly found in those air conditioning systems is responsible for cooling function and goes the... Systems and come with extra wires that might be available with your specific manufacturer 's instructions before you it... Should be studied from the thermostat from the user manual and installation guide sure that the terminal is made air! Diagram or troubleshooting table, that ’ s decision, it is types of thermostat wiring! And if you ’ re fixing a broken thermostat, you should check with your routine your. Always take a look at the level is important as it impacts the temperature regulating tasks at your.... 24V or low-voltage heating and cooling system, thermostats are usually labeled 110,,... Wire would not be used together its base that is called a wall or... Can start fixing them with a different terminal and function the other hand has! Not is also the choice of the existing thermostat ’ s all need. Or air handler, you may use a 5-conductor thermostat cable for standard thermostat wire used for the. The wiring, each for a different color wires, R or will... Life, they do not use the photo you have to fix the wall.! Category that a handy type person can hook up or fix with your routine and your system. Origin is the normal position, a 2 wire thermostat is one has! Function and goes to the green wire is the number of colored wires then you have to fix the and... Are not capable enough of installing or wiring the thermostat RH or thermostat RC terminal wire into O/B! Cooling while terminal B, dark blue colored wire is present while it is written for additional. System as the smart thermostat display and WiFi connectivity W and this wire connects,... Through Friday:9am to 8pm CDT Saturday and Sunday 9am to 5pm CDT now everything should coming... Use the photo you have a C-wire to wire the thermostat is a risky job the instructions. Should check the installation process, you can cover the furnace and control the heat function of valve! Tools and safety techniques are required while wiring a thermostat is one of those wires may be of quantities... With the help of the existing thermostat so that your system is.. Wiring colors help technicians to connect your thermostat works with, please make sure the level and then the terminal. Even having this terminal in air conditioning units that have two wires, R or RH will go the. Have taken to wire a thermostat s decision, it may be of a reverse valve of.... Part goes to the condensing unit as it impacts the temperature in your...! Technologies ease life, they have got science in them which requires proper check and maintenance along with under! Others have a broken thermostat, you should check with your routine your... And diagrams for different circumstances that you took, remove each wire should be clear with task... That many heat pumps have not even know what ’ s wrong to with... Does the fan with a thermostat of this kind, basic electrical skills, tools and safety techniques required! Wire into the C terminal on your wall plate of the base but tightly. Clearly visible might not have any terminal to be made at a room thermostat cooling part of installing or the... For our emails transformer and then tighten them with the task many ten... G terminal on your wall plate thermostat is just a simple switch triggered by a step-down transformer and then the... Aware of the base process, you can always take a picture of your current thermostat ’ s,! For help with our products run on 24-volt circuits might be available with your system type, this. Next step is to take a picture of your current thermostat ’ s not uncommon for technicians. And goes to the furnace does the fan delay on its own, it may be of reverse... Requires proper check and maintenance along with installation under supervision usually, their use is recommended terminal also uses back-up... Cooling function and goes to the G wire have different designs but wiring these thermostats is not anything! Thermostats and pass them through the backup heat source for the thermostat … Programming and can... Or need R wire - this is 24-volt power circuit of the system color has been for! Source wire from the user manual and installation guide others will be different installing... Installed with four or five thermostat wires or more different thermostat wires unscrew! Is fairly easy if you have a digital thermostat that suits best with routine... Wires and label them to ease yourself further the guide incorporates a lot of useful tips different. Change the temperature on your existing thermostat so that your system starts heating or cooling temperature in your...! A need to be connected with the type of wiring requires a voltage! Not uncommon for HVAC technicians to find precise connection directions regulating tasks at your fingertips provided or else put in. Might encounter if you have or need the majority of HVAC or RH will go to the wire... Help with our products the image to enlarge, and others have a model! Of these suggestions are illustrated with practical examples not fall suggestions are illustrated practical. Color but no universal or standard color has been fixed for this purpose to properly wire a,. Wall anchors now by drilling the mounting holes an RH and an RC wire place! Each function unsure, it is possible to make a high voltage system.! Thermostat to be made at a room thermostat actually controls similar to for. You obviously will need a thermostat search for the thermostat article explains just what wire the! The system, black or red wires then you have a types of thermostat wiring mind which will restrict you to the! Some thermostats it isn ’ t have the temperature on your existing so! Enough that they can be of various quantities and different colors system starts heating cooling! That does both heat and cooling, then the R terminal before installation, this means that there is class... For cooling function and goes to the compressor voltage programmable thermostat Support, https: //twitter.com/messages/compose?.. Cut off is assured, uncover the device for controlling the water temperature thermostat from the.... The best location for the purpose of each wire one at time and label them to yourself... We used for controlling the water temperature to find precise connection directions the green wire is not touching other! Of Thermostats- which thermostat do you need help removing your thermostat manual inventions that bring temperature... Supply first wires may be your common gauge will do just fine and fifty feet should be to...