Ecobee 2 wire installation

Works with most 24VAC HVAC equipment, including conventional furnaces and air conditioners (2H/2C), heat pumps (2H/2C + 2 stage AUX heat), boilers, and PTACs or fan coil units with up to 3 fan speeds. One 1-wire accessory or one 2-wire accessory support for humidifiers, dehumidifiers, and ventilators (HRV/ERV).

Aug 24, 2021 · How to install your ecobee smart thermostat with a Power Extender Kit. This video includes step-by-step instructions (including wire labeling) for installing... Here is what Ecobee website says. " In a conventional system, W/W1 controls your heating system and, where applicable, W2 controls your heating system's second stage, which helps warm the home faster. If you have a heat pump system with auxiliary heating, you'll normally connect the AUX/AUX1 or W2 wire to the ecobee's W1 terminal.Why We Chose It. The ecobee Smart Thermostat Enhanced is the most integration-friendly option on the market. It’s compatible with Apple HomeKit, Amazon Alexa, Android, iOS …Would this wiring work with the ecobee3 lite : ecobee Ecobee3 wiring Moving from nest to ecobee 3-wire install. My heat-only system only has two or three wires connected to the. ... Sale > ecobee 2 wire thermostat > in stockHow to install an ecobee3 smart thermostat : hellotech how Thermostat ecobeeThermostat install lite ecobee3 smart wiring ... These accessories can be connected using 2-wire or 1-wire setups depending on their configuration. . Ventilators are usually connected using 2 wires. Humidifiers and dehumidifiers can be connected with either 1 wire or 2 wires. Accessories are available on the following ecobee thermostats: Smart Thermostat Premium; Smart Thermostat Enhanced* Forum Rules. I have the Ecobee 3 lite installed and this will be the first I've used it with my 2-stage variable speed gas furnace. When the furnace was installed the installer set it up so that the furnace would control the staging but I would rather have the Ecobee control the staging. I have everything on the furnace and Ecobee physically ...noonelives520. 2 wire install - adding a common. Hey all, purchased an ecobee3 not to long ago and need some assistance with adding a common so we can finally use it. Our …Identify the wires: Locate the appropriate wires from the humidifier and the Ecobee thermostat. The humidifier should have two wires, typically labeled "HUM" and "C.". The Ecobee thermostat will also have a humidifier connection, usually labeled "HUM" and "C" as well. Connect the wires: Strip the ends of the wires and connect ...

As a result, you'll need to completely redo the wiring in order to install your Ecobee; the only good news is that your indoor unit does support a 24VAC thermostat interface, ... with a Bryant supplied T-stat and a 2-wire interface. I found out the hard way when I tried to install a donated Nest T-stat. - SteveSh.Step 5: Install the ecobee thermostat. Following the manufacturer's instructions, attach the base plate of the ecobee thermostat to the wall using screws. Make sure the base is level. Then, connect the labeled wires to their corresponding terminals on the ecobee thermostat, ensuring a secure connection.I was visiting a friend's house and they asked me to install a smart thermostat! Upon inspection, the cabling was missing the C wire. Even worse there was no...A little bit of background info: We had a Bryant 2 stage furnace installed in our home in 2021. We have a dual zoned hvac system w/ 2 ecobee thermostats controlling each zone. After the new furnace was installed, I was told by the hvac techs that we don't need a W2 wire running to our ecobee thermostats b/c the "newer 2 stage furnaces are ...I have a 2-stage heat pump and 2-stage aux gas furnace with a Ecobee (4). Yes, your Ecobee 3 should be able to control your system fine. I found a few good YouTube videos that showed how to set up a dual fuel, 2 stage system. This may be the answer to my question (3rd row in the table).Ecobee Installation Without C Wire: Smart Thermostat, Ecobee4, Ecobee3. Ecobee is a leading manufacturer of smart thermostats that are designed to make your heating and cooling systems more efficient and convenient. One of the main challenges that homeowners face when installing a smart thermostat is the lack of a C wire, also known as a common ...16 May 2019 ... Learning what each wire is used for can help you when installing a smart thermostat like an Ecobee or Nest smart thermostat. Learning what each ...

Ecobee 3 Lite Installation - No C Wire, only 3 labeled wires on Furnace board. Ask Question Asked 2 years, 7 months ago. Modified 2 years, 2 months ago. Viewed 863 times 1 Trying to install an Ecobee 3 Lite thermostat. The old thermostat had a W, G, R, and Y wire connected, but no C cable which is needed. ...West Shore > Homewood > McBride Cabin > Notes > Ecobee > 2 wire install Option 4 from Heat only 2-wire boiler/furnace installations for ecobee thermostats - ecobee Support. ... Below is a diagram illustrating how the ecobee would be wired with the common maker in this scenario. 3. Use 2 #6 pan-head screws or double-sided adhesive to attach the wiring harness to a flat surface (for example, the furnace casing) Step 2. Install diode. The diode is designed to be installed behind the thermostat, within the thermostat’s back panel wire opening. 1. Use your fingers to gently pry the thermostat away from its base. 2. Traveling to a casino and uneasy about carrying a lot of cash with you? You can ease that concern by sending your money ahead through a wire transfer. The casinos will welcome your...

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7 Mar 2021 ... Comments11 ; 2 Wire Thermostat Installation With Nest Thermostat 3rd Generation. One Hour Smart Home · 268K views ; Ecobee Smart Thermostat, Common ...Chime requirement FAQs. ecobee Smart Doorbell Camera (wired) requires an existing home Wi-Fi network and a smart device (phone or tablet) to operate. The doorbell camera is compatible with 2.4 GHz and 5 GHz Wi-Fi networks and uses Bluetooth during the initial pairing process. To learn more about wireless specifications, view the detailed specs ...Getting Started with your ecobee Smart Doorbell Camera (wired) Start here if you have a new ecobee Smart Doorbell Camera (wired) or if you’ve removed your doorbell from the app and want to add it back. This article includes information on installation and setup, plus installation best practices and basic troubleshooting tips. An alternative solution is to power the ecobee with an external 24VAC plug-in transformer. This transformer can be plugged into a wall and the transformer wires would connect to RC and C on the ecobee. The original wiring would be connected to Rh + W1 on the ecobee. Good to Know: Ensure the transformer is capable of 24V AC output (not DC output). Apr 16, 2023 · The C Wire adaptor is a crucial component of your Ecobee Smart Thermostat installation, as it allows your thermostat to receive continuous power from your HVAC system. Without a C Wire adaptor, your thermostat won’t be able to function properly, and you’ll experience issues with temperature control and connectivity. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides, wiring diagrams, troubleshooting tips and more. Check compatibility with your HVAC. Download the ecobee app to install your thermostat. Download the ecobee app.

Works with most 24VAC HVAC equipment, including conventional furnaces and air conditioners (2H/2C), heat pumps (2H/2C + 2 stage AUX heat), boilers, and PTACs or fan coil units with up to 3 fan speeds. One 1-wire accessory or one 2-wire accessory support for humidifiers, dehumidifiers, and ventilators (HRV/ERV).How to install ecobee3 lite. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides and videos, wiring diagrams, troubleshooting tips and more. Check compatibility with your heating (and cooling) system. Download the ecobee app to install your ...Ecobee Thermostat: https://amzn.to/35uLwRhFavorite Smart Home Devices: https://www.amazon.com/shop/onehoursmarthomeIn this video we …STEP 13. Gently press your ecobee into the backplate until it ‘clicks’ into place. TIP If the thermostat ‘rocks’ or is not flush with the wall, be sure the excess wires are pushed all the way into the wall. STEP 14. Turn the power to your HVAC system back on using the master switch or at the circuit breaker box.This videos is for the installation of the Ecobee 3 thermostat with a pek adapter to an AC unit without a control boardhttps://support.ecobee.com/hc/en-us/ar...Getting Started with your ecobee Smart Doorbell Camera (wired) Start here if you have a new ecobee Smart Doorbell Camera (wired) or if you’ve removed your doorbell from the app and want to add it back. This article includes information on installation and setup, plus installation best practices and basic troubleshooting tips.There are five steps to installing the ecobee Smart Thermostat Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart Thermostat. Step 4: Connect the Smart Thermostat to the Equipment Interface. Step 5: Power up both devices. Installing the Equipment Interface To install the Equipment Interface: 1.Hooking up single wire humidifier to Ecobee. Control internal humidity and manage frost buildup using the smart thermostat.Contents hide 1 Ecobee EB-STATE6 Voice Control Smart Thermostat 2 Download the ecobee app 3 Important Information 4 WHAT IS IN THE BOX 5 TOOLS REQUIRED 6 INSTALLATION 6.1 Install your ecobee with a C wire 6.2 Install your ecobee without a C wire 7 Troubleshooting 8 Still need help? 8.1 LEGAL 9 3-Year …6. Compare the wiring at your control board with the wiring at your thermostat. Open the image of your thermostat wiring on your phone. Using the color of the wires as a guide, compare the wiring on your thermostat to the wiring on your system control board. Look for the wire connectors unknown wires attach to.

Comfort without compromise. ecobee Smart Thermostat Enhanced learns your temperature preferences and your schedule, so your home is just the way you like it. Automatically lowers the temperature when you’re sleeping to keep you cool and comfortable. Pre-cools or pre-heats your home before you arrive, so it’s comfortable the moment you walk in.

All about the Chime Adapter for the ecobee Smart Doorbell Camera (wired) Warning: The Chime Adapter contains a lithium-polymer (LiPo) battery and can cause injury if damaged or improperly wired. Do not connect the device to a standard outlet or mainline power (120 VAC). Follow the instructions in the ecobee app to install.Wire 2: Detach/attach. Installation tip: Make sure all the terminal screws are snug - you don't have to overtighten them. Follow this procedure until you have attached all necessary wires to the new thermostat. Tip for extra wires: ... ecobee, nest and a few other smart/learning/WiFi thermostats also require 4 wire thermostat wiring.In my ecobee installation, it specifically mentioned that no Rc-Rh jumper is required, as this is done internally. ... Yellow common wire on each zone and blue wire going to Y. I wired up the ecobee and it works. The only problem I have now is that the humidifier doesn't work on all the zones now. It only works on the ecobee zone.The PEK cannot be installed with a heat only system. Do you have any extra unused wires behind your thermostat? If not, there is a product called "Common-Maker" from Fast-Stat, that will allow you to use your existing 2-wires without having to run a new C-wire. This solution will requirAlso known as the common wire, the C wire is what enables the continuous flow of 24V power that ecobee thermostats need to operate. To install an ecobee in an ecobee thermostat in a dual-transformer system, the C wire needs to be connected to the cooling system , not the heating system.Installing ecobee with 2 wire boiler system in basement air handler inSale > ecobee 2 wire thermostat > in stock Wires ecobeeEcobee ecobee3 diagrams humidifier ventilator dehumidifier. Check Details. Wiring help with new ecobee3 install : ecobeeG - Green: Fan - this is for the blower in the air handler. R - Red: 24 Volt Power - Your air handler is powered by 110V, but it is converted to 24V for the thermostat. C - Blue: Common wire for continuous 24 volt power from the thermostat to the air handler. E - White (optional): Emergency Heat.Option 2: Use a multimeter to measure the voltage. WARNING: To avoid the risk of shock, injury, or death, always use caution when working with electricity.Remember, if you're uncomfortable working with electrical wiring, we can help you Find a Pro to do it for you. The most accurate way to check your doorbell's wire voltage is to use a multimeter to measure the voltage directly.

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Learn how to set up your ecobee3 lite with this tutorial video.In my ecobee installation, it specifically mentioned that no Rc-Rh jumper is required, as this is done internally. ... Yellow common wire on each zone and blue wire going to Y. I wired up the ecobee and it works. The only problem I have now is that the humidifier doesn't work on all the zones now. It only works on the ecobee zone.Wire Confusion - installation (2Y and 2 . Pictures attached. I am trying to install my new ecobee. It seems I require the PEK as I don't have a C wire on my thermostat. In the control board I have 2 wires going to Y and two wires going to R at my furnace. I cannot put both wires in the PEK as the hole is too small for two wires.How to install your ecobee. 1. Download the ecobee app. The ecobee app has instructions, step-by-step videos, and diagrams customized to your wiring setup. Register your ecobee after installation to unlock smart features like Amazon Alexa. 2. Important Information. Look out for these icons at the bottom of each step.How to install ecobee4. In most homes, installing an ecobee thermostat is an easy process that takes about 45 minutes. Follow the steps below or scroll down for installation guides and videos, wiring diagrams, troubleshooting tips and more. Check compatibility with your heating (and cooling) system. Download the ecobee app to install your ...%PDF-1.7 %âãÏÓ 288 0 obj > endobj xref 288 23 0000000016 00000 n 0000002153 00000 n 0000002369 00000 n 0000002405 00000 n 0000002846 00000 n 0000002883 00000 n 0000002997 00000 n 0000003109 00000 n 0000003844 00000 n 0000004607 00000 n 0000005219 00000 n 0000005734 00000 n 0000006457 00000 n 0000007205 00000 n 0000007815 00000 n 0000007906 00000 n 0000008447 00000 n 0000009077 00000 n ...What Happens When you Install Ecobee without a C Wire? As we moved on to installing the Ecobee without a c wire, you may contemplate the difference between the two alterations and the c wire. The simple answer is that these alterations are made to act as a c wire, as the customer could face problems when no c wires are hanging around. Therefore ...Help with wiring : r/ecobeeWiring help with new ecobee3 install : ecobee Wiring diagram ecobee3 hvac unique ecobee wire thermostat wifiMy heat-only system only has two or three wires connected to the. Ecobee wiring help: setup going from simple to complex. Check Details.Yes I have an extra wire in the bundle from furnace to thermostat that I can use for the C wire. Ok.. will try out the ecobee install today later in the evening and see how it goes. Save Share. Like. 0 Reply. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread. ….

Without a G wire: With a G wire: Using a Plug-in 24v Transformer. An alternative solution is to power the ecobee with an external 24VAC plug-in transformer. This transformer can be plugged into a wall and the transformer wires would connect to RC and C on the ecobee. The original wiring would be connected to Rh + W1 on the ecobee. Good to Know:Page 6: Installing The Ecobee Smart Thermostat. INSTAllING THE SMART THERMOSTAT There are five steps to installing the ecobee Smart Thermostat Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart Thermostat. Step 4: Connect the Smart Thermostat to the Equipment Interface.All about the Chime Adapter for the ecobee Smart Doorbell Camera (wired) Warning: The Chime Adapter contains a lithium-polymer (LiPo) battery and can cause injury if damaged or improperly wired. Do not connect the device to a standard outlet or mainline power (120 VAC). Follow the instructions in the ecobee app to install.Before starting the installation, please shut off the power to your HVAC equipment. Take photos of the wires at the current thermostat, furnace/Air handler control board along with any wire splice points before making any changes.. WARNING: If the wires are your control board are a different color than the wires at your thermostat, you have splice points, and …Wiring Diagram. A professional drawing. Please excuse the amateur iPad sketch, but this should give a good idea of how it's wired up. Here's a legend if any of the colors are ambiguous. Relay ...1-866-518-6740. Smart Thermostat Premium works with most centralized residential heating and cooling systems. Heat pumps: Air, Water, and Geothermal with up to 2 stages, and 2 stages of AUX heat. Accessories: Dehumidifier, humidifier, or ventilation device. Fan coil units: 2- and 4-Pipe with up to 3 fan speeds.Pull the wires through the hole in the middle of the backplate and then attach it to the wall using the drywall anchors and screws provided. W/W1. C. TIP: Use a 3/16” drill bit to drill a hole for the drywall anchors. Remove the Rc, C, and PEK labels from the label sheet and attach them to the wires as shown below:If two separate R wires come from the wall and attach to the Rc and Rh connectors on the base of your thermostat, you have a dual-transformer system. Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup.Identify the wires: Locate the appropriate wires from the humidifier and the Ecobee thermostat. The humidifier should have two wires, typically labeled “HUM” and “C.”. The Ecobee thermostat will also have a humidifier connection, usually labeled “HUM” and “C” as well. Connect the wires: Strip the ends of the wires and connect ... Ecobee 2 wire installation, You will need to connect W (W1) and W2 to the thermostat. G = (green) the wire that can turn on/off the blower independently of heat. Let's say you want to just circulate air …, Step 1: Disconnecting the dumb. Right from the start, Ecobee did a good job with the instructions. They made the process seem simple, which took a lot of the stress out of something that could otherwise seem like a major change to your home. First, we went into the garage to power off the HVAC system (heating, ventilation, and air conditioning)., The ecobee 2 wire installation procedure will either rely on this PEK installation guide or an alternative approach that uses the Fast-Stat common maker. How Does the Ecobee PEK Work? The Ecobee power extender kit uses the power stealing technology meaning that it will try to steal as much energy as it can from the HVAC control lines to ..., 2. Remove the top cover of the wiring harness by gently squeezing its sides. 3. Use 2 #6 pan-head screws or double-sided adhesive to attach the wiring harness to a flat surface (for example, the furnace casing) Step 2. Install diode. The diode is designed to be installed behind the thermostat, within the thermostat’s back panel wire opening. 1., Ecobee Thermostat Premium: https://amzn.to/3AmammEFavorite Smart Home Devices: https://www.amazon.com/shop/onehoursmarthomeIn this video we teach you how to ..., G - Green: Fan - this is for the blower in the air handler. R - Red: 24 Volt Power - Your air handler is powered by 110V, but it is converted to 24V for the thermostat. C - Blue: Common wire for continuous 24 volt power from the thermostat to the air handler. E - White (optional): Emergency Heat., The wiring is weird. One of the thermostat wire goes into the valve. The other wire is going into a transformer. The valve has a second wire going to the same transformer. Each valve also have 2 red wires, going nowhere. Just not connected. I have plugged the ecobee using the valve wire going to RC and the transformer wire going to C and W1., How to install your ecobee. 1. Download the ecobee app. The ecobee app has instructions, step-by-step videos, and diagrams customized to your wiring setup. Register your ecobee after installation to unlock smart features like Amazon Alexa. 2. Important Information. Look out for these icons at the bottom of each step., For 2 ecobee Smart Doorbell Cameras, ecobee recommends a 16VAC 30VA or 24VAC 20VA transformer. Do not follow the instructions in the ecobee app installation guide for multiple doorbell buttons. See the above wiring diagram for correct installation instructions: the rear doorbell wire must be connected to the BLACK wire of the Chime Adapter (not ..., Install Diode Step 1. Page 2: Product Specifications (wire taken from W) 3-Year Limited Warranty ecobee warrants that for a period of three (3) years from the date of purchase by the consumer ("Customer"), the ecobee Power Extender Kit (the"Product") shall be free of defects in materials and workmanship under normal use and service., Of course, this all presumes that the cable doesn't transition from 3-wire to 2-wire somewhere in the middle; if it does, then you need to use a PEK or add-a-wire device to handle the situation atop the aforementioned aquastat ... Ecobee 3 Lite Installation - No C Wire, only 3 labeled wires on Furnace board. 3. Installing Ecobee 3 Lite ..., If you see a wire connected to your current thermostat's W3 terminal, we recommend booking a pro near you to install your ecobee. Y3: A wire connected to the Y3 terminal on your current thermostat indicates that you have a three-stage cooling system. ecobee thermostats do not support three stages of cooling. One workaround is to place a ..., Step 3: Unbox Ecobee. Open your ecobee and verify you have everything pictured above. We won't be using the power extender for this tutorial. You will need the following items. 1 face panel. 1 backplate. 1 backcover. 1 instruction manual for help. 2 Phillips screws., An electrician is a tradesman whose job is to map out, install, manage and troubleshoot electrical wiring systems. The systems are suited in homes, industrial buildings and even ma..., If two separate R wires come from the wall and attach to the Rc and Rh connectors on the base of your thermostat, you have a dual-transformer system. Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup., Page 6: Installing The Ecobee Smart Thermostat. INSTAllING THE SMART THERMOSTAT There are five steps to installing the ecobee Smart Thermostat Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart Thermostat. Step 4: Connect the Smart Thermostat to the Equipment Interface., Install your ecobee without a C wire If you don't have a C wire, you'll need to use the Power Extender Kit (PEK) included to reliably power your ecobee. GUIDE 2 Guide 2. RC RH RC RH YES NO YES NO The Power Ext YES NO Continue to the next page ender Kit will work with your system!, An electrician is a tradesman whose job is to map out, install, manage and troubleshoot electrical wiring systems. The systems are suited in homes, industrial buildings and even ma..., Install ecobee products using our easy mobile guides, and if you need extra help just contact our dedicated customer support team. ... Hardware envelope containing 2× wire extenders (100mm length), 5× wire connectors, 2× long screws (M3 x 25mm, Phillips*) with 2x anchors (for brick or concrete only), and 4× short screws (M2.5 x 5.5mm, Hex*) ..., Locate where the thermostat wires connect to your heating equipment and then verify those wiring connectors as this determines how to install your ecobee. How to install the ecobee once you have verified the wiring connectors on my equipment. Once you have determined the connectors that the thermostat wires attach to at your heating equipment ..., Ecobee wiring diagram pekEcobee 3 not powering up after installation. c wire wasn't working so i Ecobee 4 wiring diagramEcobee wiring. Ecobee3 wiring install pek power wire ecobee extender kit air if heat pumpEcobee install air Ecobee 4 wiring diagramEcobee thermostat. 2 Ecobee 4 Thermostat Wiring to control board : ecobee. Check Details, The ecobee lite3 is replacing my old, round, analog thermostat with mercury inside it. The 24VAC transformer has two wires and one of them was connected to the Rc terminal of the ecobee lite3. The other wire, after being spliced together with the Brown relay wire (via a 22-gauge wire splicer), was connected to the C terminal of the ecobee lite3., SmartSensor for doors and windows ($99.99 per 2-pack) The sensor notices that your door or window is open. Learn more about ecobee's SmartSensors for doors & windows. 2. An ecobee smart thermostat. ($169.99 - $329.99) Your thermostat automatically turns off your HVAC system to save money and energy. Learn more about thermostats., Step 5: Install the ecobee thermostat. Following the manufacturer's instructions, attach the base plate of the ecobee thermostat to the wall using screws. Make sure the base is level. Then, connect the labeled wires to their corresponding terminals on the ecobee thermostat, ensuring a secure connection., If two separate R wires come from the wall and attach to the Rc and Rh connectors on the base of your thermostat, you have a dual-transformer system. Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup., 7 Mar 2021 ... Comments11 ; 2 Wire Thermostat Installation With Nest Thermostat 3rd Generation. One Hour Smart Home · 268K views ; Ecobee Smart Thermostat, Common ..., 1. Check the wiring at your ecobee. 2. Check the wiring at your furnace/air handler. 3. Check the equipment configuration on your thermostat. 4. Check your threshold settings. If you've followed all of the troubleshooting steps above and your air conditioner still isn't turning on, please contact Customer Support for further assistance., 16 May 2019 ... Learning what each wire is used for can help you when installing a smart thermostat like an Ecobee or Nest smart thermostat. Learning what each ..., Installing The Ecobee4 Without C Wire. The Ecobee 4 is an excellent device in the Ecobee thermostat lineup. Like the Smart Thermostat, it also has support for Alexa but lacks the Alexa calling feature. The installation process of the Ecobee 4 is described below. Remove your existing Thermostat. Ensure that it works properly, to check if all the ..., There are five steps to installing the ecobee SMART Thermostat: Step 1: Install the Equipment Interface. Step 2: Wire the Equipment Interface. Step 3: Install the Smart Thermostat. Step 4: Connect the Smart Thermostat to the Equipment Interface. Step 5: Power up both devices. , The old thermostat seems to have a jumper between R & Rc. I only connected the R wire to the Rc on the ecobee. The control panel has a jumper / wire connecting W to W2. Uneducated guess that this is because the old thermostat & wiring couldn't support the 2-stage furnace? On the Ecobee, it initially indicated it was sensing a wire connected on W2., The Ecobee smart thermostat is a popular choice for homeowners looking to optimize their energy usage and reduce their carbon footprint. With its advanced features and intuitive in..., Yes, that sounds right. There are a total of 4 wires coming out of the heater, 2 "L" wires , I presume my electrician will install the 240V wire and 2 "TH" wires, where it will lead to the thermostat. I seem to be missing a common wire. Don't worry about the L wires at all in the heater and follow the below diagrams: