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Battery Powered Digital Thermostat for window unit

Discussion in 'Electronic Repair' started by Ethan, May 26, 2007.

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  1. Ethan

    Ethan Guest

    I currently have a 110 AC unit that I have in my bedroom. The
    thermostat in the unit is not digital and is effected by the outside
    temp. I have a Hunter 44260 battery powered digital thermostat
    http://www.hunterfan.com/pages/prod...hermo&model=44260&productId=18&pageID=7....Is
    there a way that I can set the thermostat up to an AC outlet that I
    plug the window unit into that would switch the power on and off to
    the outlet? The thermostat has the following connections G RC RH Y and
    W. Here is a website to a setup similar to what I am trying to do but
    it is not a battery powered thermostat. http://www.instructables.com/id/EU6DTW30N7EWYFGF10/?ALLSTEPS
    If anyone has any suggestions it would be much appreciated.
     
  2. Warren Weber

    Warren Weber Guest

    I had done that with our swamp cooler. However a mechanical relay raised
    problems with the TV set. So I used a solid state relay and built a 10 volt
    DC power supply to trip the SS relay. The programmable relay was the switch
    between power supply and SS relay W W
     
  3. R!

    R! Guest

    What you want to do can be done but it might be cheeper to do something
    different.

    1. You will need a control circuit usually 24v.

    a. a 120v to 24v transformer.
    b. a contactor rated for the maximum current expected.
    c. a sutiable electrically arrroved receptical and plug (or hardwire
    requires an electrician in most areas). d. a container / junction box
    large enougth for the above parts.

    2. Wire to wire the thermostat to the above constructed project.

    This could be very dangerous if done improperly.

    120v === Contactor ==== Air conditioner
    ||
    Control circuit ==== Thermostat

    The place you pointed to makes this more difficult than it needs to be.

    1. Get a standard control voltage transformer then none of the
    electronic parts will be needed. (diodes resistors and such).
    I reccomend a contactor not a relay because of starting an inductive
    load (motors). You would use the RC and Y connections on the thermostat
    for cooling.

    If you can't construct the control circuit you should let a professional
    help you.

    Your life your home and your health may depend on it...

    R!!
     
  4. mike

    mike Guest

    The short answer is, "don't do it."

    is effected by the outside
    Can you be more specific about the above statement?

    Take a shot at removing the cause of your problem with shading,
    insulation, etc.

    Aside from the legal and safety issues mentioned in another response,
    there are issues with compressors.
    If you switch it on and off without regard to internal pressure at the
    time of starting, you run the risk of eventually smoking your compressor.
    mike
     
  5. Ethan

    Ethan Guest

    I found a better solution
    http://www.hechinger.com/hardware/shop/99366-LuxPro-5-2-Programmable-Outlet-Thermostat--PSP300.html
     
  6. Gary Tait

    Gary Tait Guest

    You need a relay with contacts capable of controlling that unit, and a
    24VAC coil and a 24V trasnformer. You MIGHT be able to get a burner
    control from a furnace to operate it (short the eye). I have a typical
    24V electronic wall thermostat controlling a cooling fan that way (but
    not an A/C).

    I have mine connected to Brown (RC) and yellow, with red (RH) and brown
    (RC) jumpered.
    Check the manual for yours to be sure
     
  7. Al

    Al Guest

    There is an article in the March Issue of "Nuts & Volts" magazine which
    has a project that meets your need exactly. Check it in your library or
    order a copy on line.

    Al
     
  8. I saw plans today for just that. I think it's somewhere on Google.
     
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