CT87A,B,J ROUND® THERMOSTAT Wire the thermostat 1. Repeating: DO NOT RELY ON THE WALL WIRE COLORS ALONE TO FIND EXACT WIRE FUNCTION. In electric heating furnaces, this lead turns on the heating elements. Posted by 1 year ago. Wire Configuration: 2-Wire. 9am to 6pm CDT The basic installation / quick start guide is included with your thermostat (Touch here for a digital copy). We are working on it. Started by cgiben, 07-18-2019 09:43 AM. 2019-05-18: Tuned the targeting for ‘Honeywell Thermostat Wiring Color Code’, deleted ad scripts, added more related posts links, and added tags. 9am to 5pm CDT. 1 year ago There is the rare case the the thermostat is wired for a 3 wire valve but the valve is actually 2 wire. Saturday and Sunday Also, this thermostat cannot operate with a “communicating” system. Disconnect the wires and remove the old wall plate, Bundle and insert the wires through the new back plate, Insert the jumper loop below the R and Rc terminals if you only have one R or Rc wire. Monday through Friday: 9am - 8pm CDT The control box is a THM5421C and the wiring is set up as a 3 wire control which is what is required on the TH9421C1004 and it is marked 1,2,3. See Fig. Allows the fan to be run independently of whether or not actually heating or cooling is called for by the t-stat. 2017-03-08: Originally published. – A C-Wire is required to power up the thermostat. Message us on Twitter for help with our products. Connect the other end of the unused wire to the C terminal on your heating/cooling system (or the zone panel if your home uses more than one thermostat to control temperature). 1-800-633-3991 Use a screwdriver to loosen screws, insert wires into hole, then tighten screws. m1295a t834f l1 (hot) l2 temp. Connected Smart Home Products If you see thick, black or red wires then you have a line voltage system. Honeywell Aube 7 Day Programmable Thermostat works with fan-forced heaters, electric baseboards and convectors; 7 day programming; Precise temperature control; Accuracy of +/- 15°C (27°F) Up to 2500 W at 240 V - 10.4 A resistive max; 2-wire non-polarized connection; Easy to use, 3-button programming; Slim compact design with a white clean finish use either "w" or "y" terminal, but not both. 2. Honeywell TH6320WF2003/U Lyric T6 Thermostat, 3 Heat / 2 Cool Heat Pump Or 2 Heat / 2 Cool Conventional, 4.09" x 4.09" x 1.06" 4.4 out of 5 stars 132 $101.50 $ 101 . Learn more about Resideo's response to COVID-19 >, See current discounts, promotions and bundles, Get more back and more out of your products. 24 volts AC supply to cooling relay in HVAC system. See the diagram below for what each wire controls on your system: We’ll use this information to improve our help and support content in the future. 2. 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Y – Compressor / cooling (yellow). 1-800-664-2751 At left the thermostat wiring diagram illustrates use of a Honeywell T87F thermostat in a 3-wire application as a spdt (single pole double throw) switch such as used to control low voltage motors, electric radiator valves, zone valves. View Profile View Forum Posts Private Message 07-18-2019, 07:19 PM. It reveals the parts of the circuit as streamlined shapes, and also the power and also signal links in between the gadgets. Malfunction alert lamp. With so many new functions appearing on today’s modern thermostats (t-stats), there is of course, many more wires to connect up nowadays, when installing a new or replacement t-stat. 9. Speak directly with an agent for help with our products. So here, we show examples of Honeywell Thermostat wiring color code for these higher wire count t-stats. Check your wires – Your thermostat cannot operate with line voltage systems. Align the two brackets on the top of the thermostat with the corresponding slots on the top of the wallplate. Took the wires for the thermostat (1,2,3,4) stripped 2 more wires for W2 and C from the bundle and connected directly to the furnace terminals. The thermostat uses 1 wire to control each of your HVAC system’s primary functions, such as heating, cooling, fan, etc. Monday through Friday: 9am - 8pm CDT For each wire, jot down its color. The most “meaty” part of following the wiring instructions for a new Honeywell thermostat, is correctly connecting it to the HVAC system. In gas systems, this triggers the lighting process; opens the valve, turns on the ignitor, and fires up the burners in the furnace. Also, this thermostat cannot operate with a “communicating” system. So again, if putting in a new t-tat, DO NOT rely on the wire colors alone! Learn how much a Wi-Fi Thermostat could save you on your energy bills. Option A - Finding the C-Wire: There might be an extra wire pushed into the wall or wrapped around the wire bundle. Wiring Nest from 3 wire honeywell thermostat. Operates 2nd heating stage, or when controlling a heat pump, the emergency heat stage. If you have an unused wire, connect that wire to the C terminal on your new thermostat. Further, wrong wiring can break the t-stat or furnace. Take a picture of your wiring – be sure to be able to clearly see each wire and the terminal markings they connect to. The Lyric T6 PRO WIFI Thermostat Wiring Diagrams show you how to properly wire the different versions of the Lyric T6 PRO Thermostat. 3. Tighten the screw at the bottom of the thermostat. If the system does not start, power is off (If your thermostat lost power when you turned off the breaker / switch, your power is off. Metal Jumper for … 8 through 13 wiring diagrams. my old honeywell thermostat three wires is number 1 2 3.number 1 wire is red, number 2 wire is white, number wire is blue. Call any of the product support numbers above and select the 'Contractor' option. Monday through Friday: Monday through Friday: 7am - 7pm CT. If your heating/cooling equipment does not have a C terminal, check the system manual or contact the manufacturer to find out which terminal is the 24 VAC common. Match each labeled wire with same letter on new thermostat. 1. (Thermostats, WiFi Cameras, Smart Home Security, Water Leak Detectors, and Buoy) Collection of honeywell thermostat wiring diagram 3 wire. Turns on the circulating fan in most forced air heating and cooling systems. We cannot assume responsibility for damages due to faulty wiring of any t-stat. The table above provides a more comprehensive list of Honeywell thermostat wiring colors and their uses. What should we do to improve this article? Open Hours: See "Setting Slider Tabs" on page 4. Then, find out which parts the various colors of wires attach to. Communicating thermostats typically have wires labeled DATA, or 1,2,3. The C wire connects to the C terminal on the HVAC systems’ 24VAC transformer. Supplies the high side of the 24 volt AC line from the cooling power transformer in an HVAC system. 5. Try using the … Connect with an agent for quick assistance. Push the thermostat against the wallplate. It is easy to read with a intuitive dial and is non-programmable. The Honeywell Store also features a number of Non-Programmable options such as the Honeywell RLV3150A Digital Line Volt Thermostat… Saturday and Sunday: 9am - 5pm CDT, Total Connect Comfort Thermostats Unscrew the screws or depress the clasps and pull the thermostat gently away from the wall plate. 24 volts AC. Honeywell RTH6580WF WiFi Thermostat C-Wire Connection. Shielded cable is not required. Monday through Friday:9am to 8pm CDT All furnace switched components have one side of their power connected to this lead. This wire … Heat pump monitor light. The temperature range can be set from 40 deg F … So my dad recently bought a Nest, and he went to install it but seemed to run into an issue. Get it as soon as Mon, Dec 14. This can result in costly repairs. Gone are the two-wire days, when all you needed was one wire from the furnace transformer, and the other to feed power to a gas valve or relay to turn the heat on and off. One useful feature about these t-stats, is that they generally use the same wire labeling as their older models. If the correct wire functions are still not clear, then trace the wires. For Wi-Fi thermostats that do not include the C Wire Adapter, go to https://shop.honeywellhome.com/category/Accessories to order. Saturday and Sunday: 9am - 5pm CDT, Indoor Air Quality and All Other Homeowner Products 59 Results Voltage Type: Line Voltage. Gently pull the wire bundle out of the wall to check for unused wires. This thermostat can control any of these systems if they have between two and five wires. Free Shipping by Amazon ... Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White. Communicating thermostats typically have wires labeled DATA, or 1,2,3. Each of these newer functions must have its own wire from the t-stat to tell it when to operate. fall h1 h1 anticipator r g w fan relay heat relay fan switch on auto 1 1 power supply. Line voltage systems have thick wires black or white wires with wire nuts. Check the Honeywell thermostat wiring diagram in your owner's manual for more details. Use the wiring cross-reference table below to match each old thermostat wire with its corresponding terminal on the CT87 wallplate or subbase. Thermostat. If you do not have a C or common wire, your thermostat screen will not power up. Archived. This is basic heat only thermostat, with only 3 buttons on the device. For heat pumps, activates the compressor in heat mode. 75 4. R – 24 VAC / R and Rc (red). On a heat-only system, one of the wires (usually red) goes on the R terminal, and the other wire (usually white) goes on the W terminal. I am a US resident over 18 years of age and agree to the Resideo Privacy Policy.*. Offering indoor climate control is the Honeywell Round 3-Wire Thermostat and its mechanical operation with a traditional circular housing. Open Hours: May turn on when emergency heat is operating. Learn how to wire your Honeywell Lyric T6 PRO Thermostat. Saturday and Sunday: 9am - 5pm CDT, Online Order Support and Customer Service Defrost operation in progress lamp; comes on when either the HVAC compressor outside has switched into defrost mode. Other wire ( S ) connected to the R connector, white wire with same letter on thermostat! Screen will not power up, Inc. 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