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).

Installation Wire Question . Just purchased my first ecobee thermostat. Did the Compatibility check, but there 2 wires on my current lennox setup that I don't know what to do with. ... Based on that, the Tc and To wires are for the outdoor temperature sensor, ecobee receives the outdoor weather from the internet so you do not need to connect ...ecobee was named an ENERGY STAR Partner of the Year award winner ; Integrates seamlessly with your preferred smart home system. Connectivity - Wi-Fi, 802.11 b/g/n @ 2.4 GHz ... PTACs, and fan coil units (3 fan speeds). Includes Power Extender Kit for C-Wire-less homes, ensuring easy installation. DHCP (dynamic) or static IP addressing 168 bit ...In this video, I show to install the ecobee SmartThermostat with voice control in homes with multiple zones. This video was sponsored by ecobee. Learn more a...Go back to the location of the old thermostat, and install the four wires into the ecobee wall mount as follows: R wire -> Rc or Rh terminal, G wire -> C terminal, Y wire -> PEK terminal, and W wire -> W1 terminal. Snap the ecobee in place. Restore power and check that the ecobee is working correctly. Installing the ecobee PEK to an HVAC …Installing Ecobee With Only 2 Wires 02 Dec 2023. Need c-wire for installing an ecobee smart thermostat My heat-only system only has two or three wires connected to the Thermostat ecobee installing wire smart need. Installing your ecobee thermostat with a C wire. Ecobee install, wiring tips (skill level = 1 beer) Ecobee lite boiler Ecobee3 wiringFIRST TIME SETUP. I have a new Ecobee3 I'm looking to hook up to a Beckett/Honeywell R7841B heat only furnace that uses a two wire setup. I've reviewed the wiring diagram options on the ecobee3 - Heat only 2-wire boiler/furnace installations site, and hoping to get a bit more info on the installation. Here's a pic of my furnace wire setup: http ... 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 ...

When wiring an ecobee thermostat for a multi-speed fan system, specific wiring terminals on the ecobee will need to be repurposed to accommodate for the lack of dedicated G2/G3/S1/S2 terminals:. The low-speed fan wire (typically G, Gl, or G1) will go to G The medium-speed fan wire (typically G2 or Gm) will go to Y2 The high-speed fan wire …Connectivity: 2.4 and 5GHz Wi-Fi. The Ecobee Enhanced Smart Thermostat's design features a rounded body with a simple touch interface. The physical interface and app controls have a similar design, and the app is available on both iOS and Android. The device has built-in sensors to monitor for temperature, humidity, and motion.But before purchasing the thermostat, you must check the pump you got with the Ecobee wiring compatibility. During the installation period, wiring the thermostat with the heat pump must get the highest priority. The Process to Follow for Ecobee3 Heat Pump Wiring. A small misconnection of any wire can make the whole wiring process go in vain in ...Now, you are ready to install the ecobee mounting plate. Connect the four wires into the ecobee wall mount as follows: R wire -> Rc or Rh terminal, G wire -> C terminal, Y wire -> PEK terminal, and W wire -> W1 terminal. Snap the ecobee unit into place. Restore power and confirm that the ecobee is working properly.3 Wire Installation . Hello, I recently installed the ecobee lite with 3 wires. I had an old Honeywell thermostat in before, controlling the fan and central air. ... When I press the icon to turn it on there is an off option only. I read on the ecobee site that I would have to install the Pek but I was wondering if there was a work around by ...Installing Ecobee With Only 2 Wires 02 Dec 2023. Need c-wire for installing an ecobee smart thermostat My heat-only system only has two or three wires connected to the Thermostat ecobee installing wire smart need. Installing your ecobee thermostat with a C wire. Ecobee install, wiring tips (skill level = 1 beer) Ecobee lite boiler Ecobee3 wiringThe triangles represent how the wires are capped together. Now, my confusion comes from examining this diagram from the ecobee site. 3-WIRE INSTALL W/ TACO ZONE VALVE AND T&T AQUASTAT. Our wiring looks VERY similar to this diagram except the R wire from our transformer goes to the W for the thermostats and the R from the thermostats …

I currently have a zoned system with a fresh air "ventilator" (actually just a fresh air damper) and I want to install an ecobee thermostat. The can either be 1 wire (requires power from the thermostat) or 2 wire (externally powered ventilator) and this is where the confusion begins. On my current thermostat I have two wires going to my fresh ...When you register your new ecobee to your account, you will be able to access it in the mobile app and through the Web Portal. From there, you'll be able to control and manage all of the thermostats linked to your account. Good to know: You can add up to 16 ecobee smart thermostats to a single account.Short Answer. To install an ecobee thermostat with two wires, you will need to connect the red and white wires to the R (24VAC) and W (Heating) terminals on the thermostat. Then you will need to power up the thermostat by connecting the remaining wire to the C (Common) terminal.This was not recommended by ecobee support and did solve the problem as I could then run the setup as a 2-wire installation. Other info I found out: the ecobee3 has about 3.5W power consumption. Each contact can handle up to 2 amps. I also originalloly had the low voltage issue that Hfly1 talks about.Ecobee Smart Thermostat Installation with DHUM/G Wire Hey all, Been following this page to stay afloat of this first time homebuyer journey and DIYing, and appreciate the insight! I recently got a Ecobee Smart Thermostat and followed the proper instructions of taking off my old thermostat, taking pics, and shutting HVAC on circuit board, etc.

Honeybaked escondido ca.

The triangles represent how the wires are capped together. Now, my confusion comes from examining this diagram from the ecobee site. 3-WIRE INSTALL W/ TACO ZONE VALVE AND T&T AQUASTAT. Our wiring looks VERY similar to this diagram except the R wire from our transformer goes to the W for the thermostats and the R from the thermostats goes to the ...Use the New Backplate as a Template. Use the new thermostat's backplate and a pencil to mark the wall. Using a small bit, drill holes at the marks for the backplate screws. (Install wall anchors ...Advertisement Connectors are critical to today's cars. Without them, it would be nearly impossible to build or service a car. Whenever a bundle of wires passes through or attaches ...Ecobee install air voice control Wiring ecobee Ecobee4 wiring diagram. Ecobee install, wiring tips (skill level = 1 beer) Ecobee 3 lite heat only 2-wire boiler w/oil primary control & aquastatEcobee3 lite smart thermostat install and review Found these two wires, could it be for the humidifier? : r/ecobeeEcobee installing boiler transformer wiring.Share. firestorm_v1. • 3 yr. ago. Pretty much that's it. Kill power, pull old thermostat, install Ecobee, wire Ecobee, slap thermostat on wall mount, turn on power, get phone and finish setup. When you pull off the old thermostat front (but the base is still on the wall), take a photo with your camera.

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 ...Also 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.Option 3: Choose a thermostat that includes an adapter. Pictured: ecobee3 lite, one of our favorite thermostats. Even though it comes with an adapter for missing c-wires, ecobee is what we'd pick even for systems with a c-wire. If you've got a 24v HVAC system but no C-wire, check out the ecobee product line. Every ecobee ships with an ...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. ... Installation for 2-wire systems. Installation for dual-transformer systems. Installation, Setup and User guide. French Installation ...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:Unscrew the two wires from the terminals. Remove the motherboard of the old 2 wire thermostat and put the new 2 wire thermostat in its place. Reconnect the red and white wire, tighten down the set screw, and put the control panel back on. Test the 2 wire thermostat wiring by turning the furnace on.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 …Guide 1: Install with a C-wire Guide 2: Install without a C-wire Extras 5 7 14 29 54. First things first. Here's what you'll find in the box. PEK W2 W1 Rc RH G Y1 Y2 O/B C ... 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.Close the ecobee app and restart. iOS: depending on your iPhone model, either swipe up from the bottom or double-click the Home button, then swipe right or left to find the ecobee app, then swipe up to close it. Android: long-press the ecobee app icon on the home screen and select Force Stop. 2. Power-cycle the Smart Doorbell Camera (wired) by ...The short green wire above connects the R/H terminal on the Ecobee's EI (the lettering is hidden by the wire) down to the ACC1r terminal. This provides 24V power from the R/H terminal to the ACC1r terminal. 2. Connect the ACC1 terminal on the Ecobee Equipment Interface to one of the humidifier leads. The slightly darker red wire (on the right ...

SmartSensor for doors and windows ($79.99 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 - $249.99) Your thermostat automatically turns off your HVAC system to save money and energy. Learn more about thermostats.

[email protected] 1.877.932.6233 (North America) 1.647.428.2220 (International) Compatible systems ecobee3 works with most centralized residential heating and cooling systems. Heating: up to 2 stages Cooling: up to 2 stages Heat pumps: 1 or 2 stages + up to 2 stages auxiliary heat Accessories: Dehumidifier, humidifier or ventilation deviceMy ecobee came with an adapter that allowed me to use one of the existing wires as a c wire. I believe the adapter comes standard with most of their thermostats. It was fairly easy to install. You will need to have some understanding of wiring diagrams so that you can identify the appropriate wire to use.Same Ecobee style. The Ecobee3 Lite looks identical to the brand's existing $249 Ecobee3 Wi-Fi Smart Thermostat. Both have a 3.5-inch glossy black digital display with a touchscreen interface ...At my thermostat/ecobee I have two unused wires. Can I use them to directly connect the ACC +/- Ports at the Ecobee to the solenoid for my evaporative humidifier. This would completely bypass the old Trane unit. I believe I still have to configure the ecobee to tell it that it is controlling a humidifier.Install your ecobee with a C wire If you have a C wire, it will power your ecobee. You won't need the Power Extender Kit (PEK) included in the box. /W1 /Y1 c RC RH 12 STEP 5 Carefully disconnect and label the wires from your old thermostat one at a time, using the labels provided.Installation. Have an old school oil furnace, with a 1970's Honeywell mercury switch. Simple 2 wire - the mercury just touches two wires, and completes the circuit to turn heating on. The wires are labeled "T/T". I am now aware that not all 2 wire furnaces are the same, others are labeled "TH/TH" or "R/W", and the distinction is important....Installation guide; Wiring diagrams. Conventional heating/cooling; Heat pump with auxiliary heat; Boiler radiant system; Wiring with the Power Extender Kit; …Learn about its installation, design and features. Save up to $180 per year and streamline your heating and cooling system with the ecobee SmartThermostat. Search for:

John f kennedy blvd houston tx.

Craigslist locust grove.

1 2 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. Important Information Look out for these icons at the bottom of each step. They indicate useful tips and important reminders. TIPS ...Trying to install ecobee, but ran into a wiring issue. : ecobee Wiring confusion with ecobee 4 : r/ecobee Wiring for ecobee 3 lite : ecobee Ecobee only turns on if I manually do it. : r/ecobee Installing your ecobee thermostat with a c wire Smartthermostat with voice control and ecobee4 wiring diagrams Wiring diagram pump …Ecobee Smart Thermostat Enhanced: https://amzn.to/3QIlpvuFavorite Smart Home Devices: https://www.amazon.com/shop/onehoursmarthomeIn this video we teach you ...Find out if an ecobee thermostat is compatible with your 2- or 3-wire heat-only boiler/furnace system, and what you can do to make your system compatible if it isn't directly compatible. ... thermostat wires connect to your heating equipment and then verify those wiring connectors as this determines how to install your ecobee.Everything you need to install ecobee thermostats is in the box, including a Power Extender Kit to replace the common (C) wire if missing. Also comes with an ...Find out if an ecobee thermostat is compatible with your 2- or 3-wire heat-only boiler/furnace system, and what you can do to make your system compatible if it isn't directly compatible. ... Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup.The yellow Y at the ecobee thermostat is still connected to C on the control board (the AC compressor relay is wired inline with the Y terminal back to the common on the control board). The blue wire is now basically a common, and the ecobee3 powered right up and has been working as expected since. Thanks Tester101 for pointing this out!Now my 2 wire system is a 3 wire system with a C wire that I can wire up to the thermostat as shown in the picture below: Wiring after adding the blue C wire I connected at the transformer. After that, I just popped the Ecobee in. The Ecobee has a couple of different mounting options. You can just use the backplate.Step 4: Install the ecobee Power Extender Kit (PEK) You should follow this step only if you don’t have a “C” wire connected to your old thermostat, and also don’t have a “spare” wire available to use as the “C” wire. The most common example of this would be if you only had R, G, Y, and W wires at your 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. Step 5: Power up both devices. Installing the Equipment Interface To install the Equipment …Guide 2 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. Continue to the next page Return to step 1 ….

Install the jumper between ON and RED. Then wire the Ecobee ACC wires to HI and ON. The HRV will run in high speed when it's turned on. You could also use low speed instead. Just connect the ACC wire to LOW instead of HI. The Ecobee can only control one speed and not both. image.jpg. 1.84 MB, 3264x2448.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 ...How to install Smart Thermostat Enhanced. 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 system. Download the ecobee app to install your thermostat.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).May 17, 2022 · The ecobee Smart Thermostat Enhanced and Smart Thermostat Premium can be installed in homes with Air to Air or a Geothermal Heat Pump. Watch this video for h... SmartSensor for doors and windows ($79.99 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 - $249.99) Your thermostat automatically turns off your HVAC system to save money and energy. Learn more about thermostats.ecobee Switch+ comes with 4 wire connectors in the box. To use them hold the wires you're connecting parallel to one another so that the ends are aligned. Holding the wires together and parallel, insert them into a wire nut. Twist the wire nut clockwise until secure. Double-check by tugging on the wires gently.The Ecobee3 automatically handles the Rh vs Rc thing, so just connect your R wire to either Rh or Rc. You can connect Y to Y only on the Ecobee3 and configure it for heat pump operation. W2 connects to W1 on the Ecobee -- this is your axuiliary heat. Yes, O on your old 'stat does connect to O/B on the Ecobee. Ecobee 2 wire installation, FIRST TIME SETUP. I have a new Ecobee3 I'm looking to hook up to a Beckett/Honeywell R7841B heat only furnace that uses a two wire setup. I've reviewed the wiring diagram options on the ecobee3 - Heat only 2-wire boiler/furnace installations site, and hoping to get a bit more info on the installation. Here's a pic of my furnace wire setup: http ... , The Ecobee turns on but it says "To use W2 you must have the W1 wire installed. If only one W wire is installed it must be connected to the W1 terminal". I'm guessing the solution is just to connect the wire currently in W2 to W1 but I'm inexperienced with this kind of thing and I didn't want to risk shorting something or otherwise ..., 2. Install the wire from your 24 volt adapter to the "C" terminal and the other wire to the "RC" terminal. You need to use included jumper and connect from "RH" to "RC" terminals，if HVAC system has a cooling. 3. Plug the power adapter into the socket and turn on the power of the circuit breaker. 4., 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 current heating system is a boiler with only 2 wires going to the thermostats and the thermostats connect to the taco valves. ... then I wired the ecobee in with the blue being common, other ..., Connect your thermostat C wire to the air handler B terminal along with the wire that is already there. Appreciate your help! Thermostatic Controls - Ecobee add a C wire - Hi guys, i am replacing my old thermostat (Robertshaw 9600) to the Ecobee, and I didn't even realize that I need an extra c cable to power the unit until I hook up all the ..., With the old thermostat removed, you're one step closer to installing the Ecobee3 Lite Smart Thermostat. The next step is to install the Ecobee backplate, which serves as the connection point for the new thermostat. Step 3: Install the Ecobee Backplate. With the old thermostat removed, it's time to install the Ecobee backplate., 1 2 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. Important Information Look out for these icons at the bottom of each step. They indicate useful tips and important reminders. TIPS ..., Short Answer. To install an ecobee thermostat with two wires, you will need to connect the red and white wires to the R (24VAC) and W (Heating) terminals on the thermostat. …, Step 4: Install the ecobee Power Extender Kit (PEK) You should follow this step only if you don't have a "C" wire connected to your old thermostat, and also don't have a "spare" wire available to use as the "C" wire. The most common example of this would be if you only had R, G, Y, and W wires at your thermostat., 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 jumper between the Y2 and Y3 terminals on your furnace’s control board., As you can see, I do NOT have a C wire at my thermostat, but I DO have a C wire on my furnace control panel. I have a brand new Goodman furnace and Goodman AC, both of which were installed with the last 3 years. Here is my furnace. Here is my AC. I tried myself to install the Ecobee and undid everything. I followed the app's directions., Advertisement Connectors are critical to today's cars. Without them, it would be nearly impossible to build or service a car. Whenever a bundle of wires passes through or attaches ..., Find out if an ecobee thermostat is compatible with your 2- or 3-wire heat-only boiler/furnace system, and what you can do to make your system compatible if it isn't directly compatible. ... Read this article to find out if you have a dual-transformer system and learn how to install an ecobee thermostat in your setup., The Ecobee3 automatically handles the Rh vs Rc thing, so just connect your R wire to either Rh or Rc. You can connect Y to Y only on the Ecobee3 and configure it for heat pump operation. W2 connects to W1 on the Ecobee -- this is your axuiliary heat. Yes, O on your old 'stat does connect to O/B on the Ecobee., Ecobee3 lite wiring diagramEcobee3 lite ecobee thermostat smart Easy ecobee3 install with c wire. this mom shows you how.Wiring ecobee3 ecobee pump thermostat hvac ecobee4 confirmation. Wires ecobee3Ecobee thermostat installing lite ecobee3 Wiring diagram ecobee3 hvac unique ecobee wire wifi thermostatEcobee support. Reddit - Dive into anything, Installation And Setup. Installing your ecobee thermostat with a C wire. If your current thermostat has a C wire, please follow the directions below., 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. , 14 Nov 2020 ... In trying to figure out how to hook up this Ecobee 3 Lite to an in-floor, heating system that only uses a red and white wire for each zone ..., support.ecobee.com, 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 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 without c wire Ecobee4 ecobee humidifier ventilator dehumidifier Ecobee thermostat extender pek furnace. Ecobee3 wiring. How to install ecobee with 'add-a-wire' system : r/ecobeeSale > ecobee 2 wire thermostat > in stock How to install your ecobee smart thermostat and power extender kitEcobee thermostat wiring blowing boiler., Adjust the temperature on your ecobee smart thermostat. ecobee smart thermostats balance comfort and savings like magic by adjusting your temperature automatically—but you can also change it manually on the thermostat itself or in our intuitive app. Get to know your Smart Thermostat >., The ecobee Smart Thermostat Enhanced and Smart Thermostat Premium can be installed without a C wire by using the Power Extender Kit, or PEK, included in the ..., When it comes to installing or troubleshooting a Goodman furnace thermostat, proper wiring is essential for optimal functionality and performance. However, there are some common mi..., Ring is the only one of our picks to offer both 24/7 monitoring and 24/7 customer service, which is available over the phone. In contrast, SimpliSafe customer service is available only from 8:00 a ..., Match each labeled wire to its corresponding terminal on the base plate. Use a screwdriver to secure each wire properly. If you have an extra wire, you may need to install the included PEK (Power Extender Kit) to provide additional power. Configure the Ecobee 3 Lite Thermostat, 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 ..., 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., 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., 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 current heating system is a boiler with only 2 wires going to the thermostats and the thermostats connect to the taco valves., The red wire is used on a ceiling fan installation when the wiring includes two wall switches, in which case one switch operates the light and the other switch operates the fan. If..., The R wire will go into the Rc terminal, the G wire into the C terminal, and the Y wire into the PEK terminal on your new thermostat's backplate. Note: There's no need to install the new PEK. You can continue to use your ecobee3's PEK unit with your new thermostat. 7) Remaining wires will go into the respective terminals.