When it comes to low voltage systems, a 2 wire thermostat is usually known as a “heat only thermostat” and is used for systems like a gas furnace (with only heating option). Green – The green wire connects to the fan. The Nest Generation 3 thermostat can be used with heating only and cooling only systems and requires only wires. If you want to check to make sure the HVAC configurations are correct after installation, refer to this article for instructions on how to configure thermostats. The yellow wires terminate at your compressor contactor via an air handler. Refer to our system compatibility checker to see if Sensi Thermostats will work for you. If you have a jumper wire on your old thermostat, discard it and input only the wires from the wall into the Sensi app when prompted during installation. Connect the white wire to the "W" terminal on the furnace and thermostat. Sensi Multiple Thermostat Manager lets you remotely monitor and control all your Sensi Wi-Fi Thermostats in one intuitive portal; Simply install your Sensi thermostats using the step-by-step instructions in the free mobile app, then go to our website to sign up for Sensi Multiple Thermostat Manager (monthly and yearly subscription plans available) We use cookies and similar technologies to improve our website, to personalize website content to you,  and to deliver advertising messages and offers on content that are relevant to you. See for yourself why Sensi Smart Thermostats consistently receive outstanding reviews for its simple installation, intuitive app design and highly-rated customer support. Sensi thermostat is rated for 20-30 VAC. WE COLLECT PERSONAL INFORMATION SUBJECT TO THE CALIFORNIA CONSUMER PRIVACY ACT. For more specific information on how we use cookies and to change your cookie preferences, see our Cookie Notice. A jumper wire does not originate from behind the wall, but is unique to each thermostat. •Sensi Touch Smart Thermostat has a built in RC/RH jumper, no need to field install a jumper •If you have separate wires to RC and RH terminals (two transformer systems) –Label the wires RC and RH separately and then clip the jumper wire on the Sensi back plate. Sensi thermostats are designed to work on most heating and cooling systems. WE COLLECT PERSONAL INFORMATION SUBJECT TO THE CALIFORNIA CONSUMER PRIVACY ACT. Repeat this for the red wire, connecting it to the "R" terminal on both the furnace and thermostat. The Nest Thermostat is not only the best 2 wire wifi thermostat but it is one of the best wifi thermostats you can get for your home. Please enable JavaScript to use this website. Strip the red and white wires back about 1/4 inch at both the thermostat and the furnace ends. Yellow – The yellow wire connects to your compressor. ©2021 Emerson Electric Co. All rights reserved. If you have a jumper wire on your old thermostat, discard it and input only the wires from the wall into the … A wiring diagram is a streamlined traditional pictorial depiction of an electrical circuit. Orange – This wire connects to your heat pump (if you have one). Leave the wire that comes out of the wall attached to either RC or RH. Connect one end to RC and the other end to RH on the wall plate. Yellow Wires. Click our page to learn more. Access Sensi smart thermostat from a smartphone or tablet to control your home environment even when you’re far from it. We use cookies and similar technologies to improve our website, to personalize website content to you,  and to deliver advertising messages and offers on content that are relevant to you. Follow the in-app instructions to wire the thermostat. The problem with a C wire transformer is, you need to have a plug in outlet near to your thermostat location. Sensi thermostat does not use jumper wires. Click the X to close this notice. Our customer support is available 7 days a week. The white wire underneath your thermostat connects to your heating system. If the wires … Sensi thermostat has a built-in RC/RH jumper wire on the back of the thermostat face plate. The jumper wire connecting terminals RC and RH are most common, and this jumper wire is not necessary on Sensi thermostat. A line voltage thermostat will typically have wires larger than 18 gauge and may not have terminal labels. Understand and don’t want to see this message again? Check thermostat compatibility for Sensi Smart and Sensi Touch Smart. You can also learn more by downloading the Sensi Installation Guide which walks you through wiring and connecting to Wi-Fi. They control your air conditioning system. This indicates you have a two-transformer system. Some users have commented that the Wi-Fi has a tendency to drop out from time to time. Check your wires To view the wires connected to your existing thermostat, first remove the thermostat cover from the baseplate. (Android users) (Android users) If your thermostat firmware version is 6004970500 or later, you will use the code that dynamically populates on the thermostat screen during the Wi-Fi connection process. Most two-wire thermostats wire have a red and white wire encased in a brown insulated coating. ST75, Sensi Touch Smart Thermostat (Black), ST75W, Sensi Touch Smart Thermostat (White), University Multiple Thermostat Management, Troubleshooting Sensi Thermostat Wi-Fi Connectivity, article for instructions on how to configure thermostats. Our customer support is available 7 days a week. Red – … Mount the thermostat using the supplied screws, drilling holes if necessary. What is a Thermostat Jumper Wire and What do I do if I Have One? A thermostat jumper wire is a short piece of wire connecting two terminals on the thermostat base. ©2021 Emerson Electric Co. All rights reserved. Please enable JavaScript to use this website. Click the X to close this notice. •Sensi Thermostat has a jumper built in on the back of the thermostat Sensi thermostat does not use jumper wires. The … ** The common wire could be labeled "C" on your old thermostat, or it could be labeled "B" or "X". Make sure all wires are screwed in tight C and secure. Sensi thermostat is not compatible with line voltage systems. The white wire connects to terminal W in industry-standard thermostats. If you’re unsure of your system voltage, you or a contractor should measure voltage using a multimeter. Conventional systems include: boiler, gas furnace, radiant heat, electric heat and air conditioning, Heat pump systems include: heat pump, dual fuel, geothermal, If your old thermostat has wires attached to the following sets of terminals, the Sensi thermostat is. I used the code on the Sensi welcome guide when installing my Sensi Touch Wi-Fi Thermostat, and now it’s not working. The terminals on a two-wire thermostat are labeled R and W. If you use a thermostat with more terminals, but you only have two wires, you can ignore all the other terminals except for these two. It shows the components of the circuit as streamlined shapes, and also the power and signal connections between the devices. For more specific information on how we use cookies and to change your cookie preferences, see our Cookie Notice. Installing the Sensi Thermostat 9 1011 Connect the Wires Attach the appropriate wires to the corresponding Sensi thermostat wire terminals. •Sensi Thermostat has a built in RC/RH jumper, no need to field install a jumper •If you have separate wires to RC and RH terminals (two transformer systems) –Label the wires RC and RH separately and then clip the jumper wire on the back of the Sensi face plate. * If the old thermostat has separate RC and RH wires coming out of the wall, clip the RC/RH jumper on the back of the thermostat above the battery compartment. 2 Sensi Wi-Fi Thermostat Key Features •Universal application (single-stage, multi-stage and heat pump) •Compatible with popular smart home platforms •Contractor-On-Call feature •Geofencing, flexible scheduling and remote access can save homeowner’s on energy costs. If there is no wire on “O”-label the wire “B”. The 2 wire thermostat for line voltage systems are technically known as single pole thermostat (and the 4 wire version is known as double pole thermostat). Please refer to the owner's manual of your old thermostat for clarification. Learn more here. Another issue is the long cable running inside the room (not hidden inside the wiring conduits), which tampers the visual beauty of your room interiors. Download the Sensi app on your smart phone or tablet. The Sensi Wi-Fi Smart Programmable Thermostat 1F86U-42WF works very well without a ‘C’ wire. † Two transformer systems (separate RC and RH wires), clip internal jumper located on back of Sensi above battery compartment. Clip the RC/RH jumper wire on the Sensi thermostat if you have two separate wires (one running to RH and the other to RC) on your old thermostat that are coming from the wall. ST75, Sensi Touch Smart Thermostat (Black), ST75W, Sensi Touch Smart Thermostat (White), University Multiple Thermostat Management, Troubleshooting Sensi Thermostat Wi-Fi Connectivity. The Sensi app provides all the installation instructions for wiring your new thermostat. •Smart alerts •Keypad lockout •Multi thermostat control. Save about 23% on HVAC energy 1. The colors associated with these terminals are red and white, so if the wires coming out of your wall are these colors, simply connect the red one to the R terminal and the white one to the W terminal. Sensi thermostat has a built-in RC/RH jumper wire on the thermostat base. If you’re unsure of your system voltage, you or a contractor should measure voltage using a multimeter. Either the heat wire and the power wire (W & Rc or Rh) or the AC wire and power wire (Y and Rc or Rh). The Nest learning, 2 nd Generation also claims to be able to work without a ‘C’ wire as it ‘borrows’ the power from the ‘D’ and ‘G’ wire. A 2 wire thermostat can not be used for hvac systems with cooling option, or … It terminates at your air handler or furnace. Below is a table of common jumper connections you may see on your old thermostat base. It should easily snap off. Assortment of sensi thermostat wiring diagram. Insert one wire into the unused “R” terminal on the thermostat (RC or RH) and the other wire into the “C” terminal. Learn more here. Some covers pull off while others need to be released using a screwdriver. The yellow wires underneath your thermostat connect to your compressor. A thermostat jumper wire is a short piece of wire connecting two terminals on the thermostat base. If you accidentally clipped the RC/RH jumper on the back of the Sensi thermostat and did not mean to, you will need to re-jumper those two terminals. A line voltage thermostat will typically have wires larger than 18 gauge and may not have terminal labels. †† Label “B” as “C” only if the old thermostat also had a wire in “O”. Strip the cord around the two wires to expose a small amount of the copper wiring inside, which will be inserted into terminals on the Sensi thermostat base. To create a new jumper for RC/RH, use a short piece of thermostat wire, strip the insulation off both ends of the wire and bend it in half. Sensi thermostat is not compatible with line voltage systems. Understand and don’t want to see this message again? The two wires on your old thermostat would connect to RH and W1 on the ecobee; NOTE: Ensure the transformer is capable of 24V AC output (not DC output) NOTE (2): Some T/T connections may not work reliably when connected directly to the Rh and W1 terminals of the ecobee. First stage outdoor cooling on conventional systems or first stage outdoor heat and cool on heat pump systems, Second stage outdoor cooling on conventional systems or second stage outdoor heat and cool, on  two stage heat pump systems or humidifier, First stage indoor heat on conventional systems or first stage indoor auxiliary / emergency, Second stage indoor heat on conventional systems or second stage indoor auxiliary, / emergency heat on heat pump systems or dehumidifier, Changeover (reversing valve) connection for heat pump or zone panel systems. A C wire transformer is quiet easy to setup as you just need to plug in the device and connect two wires to the thermostat. The jumper wire connecting terminals RC and RH are most common, and this jumper wire is not necessary on Sensi thermostat. Sensi thermostat is rated for 20-30 VAC. Sensi Smart Thermostat | INSTALLATION GUIDE 5 Turn Off Power Turn off the power to your heating and air conditioning system before handling your thermostat wires. A jumper wire does not originate from behind the wall, but is unique to each thermostat. •RC/RH jumper built-in on the back of the thermostat Remove Old Thermostat Cover Remove the cover using a screwdriver or by pushing the pressure latch.
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