My thermostat has just two cables. Am I appropriate for ecobee?

ecobee thermostats require a C (popular) wire to energy on. In case the current thermoregulator utilizes just two cables (R and W, or T and T), you can find an installation that is few available, dependent on the application.

Prior to getting started, take note the annotated following:

    You simply will not manage to install the Power Extender Kit (PEK) with heat-only systems that are 2-wire. The PEK can just only be properly used on furnace or temperature pump systems which do not have C cable — it is because the PEK calls for R (power), G (fan), and Y (compressor) cables to use, and these 2-wire systems that are heat-only n’t have these G and Y cables

To find out compatibility, you will have to access both the wiring at your thermoregulator along with the wiring at your home heating in which the thermoregulator wiring concludes.

If you’re unpleasant doing so, you’ll touch base to ecobee help for guidance, or employ a technician to assist in installation

  • Based on what number of free cables you’ve got behind the wall surface during the thermoregulator, many of these choices will demand extra elements which are not added to the ecobee, including operating brand brand new cables and/or buying an external transformer that is 24VAC SP/NO isolation relay, or Fast-Stat Common Maker

    For those who have one thermostat managing your heating system, continue to step two below.

    Action 2:Determine how many additional cables you have actually behind your wall surface during the thermoregulator

    Eliminate your thermoregulator from the wall surface to see any unused cables which are maybe perhaps maybe not presently linked to your thermoregulator. Be sure to always check behind the wall surface during the thermoregulator also. The wire bundle at the thermostat will contain more than two wires total, with numerous unused wires available for use in some cases.

    Note this true quantity down and continue to Step 3.

    Action 3:Determine just what wiring terminals you have got in your home heating

    The step that is next confirming exactly what your thermostat cables connect with at your heating equipment.

    Put in writing the wiring tints at your thermoregulator while the kinds of terminals they have been linked to. Next, find your thermoregulator wires at your heating gear. You’ll want to find the part of that the two low-voltage thermostat wires join up together with your gear.

    With regards to the make and model of the gear, your thermoregulator wires may hook up to the immediate following:

    • Wiring terminals such as for instance R, W, and C at your furnace
    • A gas valve with terminals such as for example Th, Tr, and Th-Tr
    • T/T connections, frequently attached to an Aquastat


    In case your thermostat cables connect to terminals marked R and W, installation is really as straightforward as linking a 3rd cable into the common in the furnace or boiler’s low-voltage typical point. brightbrides reviews According to your furnace, this can be either a terminal marked “C” or “Com 24V”, or perhaps you might have to find where in actuality the popular may be attached to.

    Every furnace and boiler which has had a 24vac transformer will have a standard terminal—just trace the 2 low-voltage wires to see where they hook up to. When there is a current connection point, then touch the C cable from the thermostat as of this point. Often cutting/stripping the wire that is common splicing the thermostat’s C cable are often needed.


    Merely link the free cable into the typical connection point.

    IF NO EXTRA is had by you WIRES

    You have two options if you do not have any additional wires:

    • Run a wire that is additional your thermoregulator down to your gear
    • Buy and install a Fast-Stat Common Maker


    Another solution is always to power the ecobee with a outside plug-in transformer that is 24VAC. This transformer could be attached to a wall surface, and could be wired the following:

    • The transformer that is 24VAC would hook up to RC and C regarding the ecobee
    • The 2 cables on your own old thermostat would connect with RH and W1 in the ecobee

    NOTE: Ensure the transformer can perform 24V AC production ( perhaps maybe not DC production)

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