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  1. #1
    Join Date
    Apr 2018
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    Texas
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    Carriers W7220 Economizer

    Today ran into an issue on a new install our company did. I walked past this unit and it was in heating, so I thought no problem(since it was cooler this morning). On the way off the roof, I hear the cooling kick on. So I walk over to the unit and both heating and cooling are running. So I open up this new TCCD012 unit and notice the white wire coming from the Honeywell w7220 is not connected to the low voltage terminal on the board. So I connect it and turn the unit back on and the same thing. So since I haven't had a chance to learn this new interface, I take a look at the settings. What I ended up doing was setting the AUX input to shutdown and so far the problem has gone away. What do I need to look for when I go back? I quickly looked over the wiring and it looked right. And I did check the low voltage from the tstat, so I know it is something internal to the unit. So is it the settings or the wiring?

  2. #2
    Join Date
    Nov 2014
    Location
    Philadelphia area
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    72
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    Not familiar enough to say definitively that it is not the control, but from the couple times ive wired and programmed those economizer controllers id say it’s most likely a wiring problem. Theyre pretty user friendly and the control probably wouldnt allow that to happen if you tried. Sounds like you might have “w” crossed with “y” somewhere between the board and the economizer control. Trace everything out.

  3. #3
    Join Date
    May 2014
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    Bay Area California
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    Isn't the W7220 the control module for the economizer? If so, any color of wire may be used.

    Plus, that control module never sees a signal from the heating side of the thermostat, it is for an economizer which only deals with cooling.


    Quote Originally Posted by robertmb3 View Post
    Today ran into an issue on a new install our company did. I walked past this unit and it was in heating, so I thought no problem(since it was cooler this morning). On the way off the roof, I hear the cooling kick on. So I walk over to the unit and both heating and cooling are running. So I open up this new TCCD012 unit and notice the white wire coming from the Honeywell w7220 is not connected to the low voltage terminal on the board. So I connect it and turn the unit back on and the same thing. So since I haven't had a chance to learn this new interface, I take a look at the settings. What I ended up doing was setting the AUX input to shutdown and so far the problem has gone away. What do I need to look for when I go back? I quickly looked over the wiring and it looked right. And I did check the low voltage from the tstat, so I know it is something internal to the unit. So is it the settings or the wiring?
    If you were a real tech, you'd solder a relay on that board and call it good to go.

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  5. #4
    Join Date
    Nov 2006
    Location
    Southeastern Pa
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    Quote Originally Posted by BBeerme View Post
    Isn't the W7220 the control module for the economizer? If so, any color of wire may be used.

    Plus, that control module never sees a signal from the heating side of the thermostat, it is for an economizer which only deals with cooling.
    Correct. We typically buy the Jade package as a retrofit for Carrier economizers, and once in a while, an older York Predator model. The newer Yorks use a JCI communicating module for their econ system.

    The only wires connected to the jade are the sensor inputs, the 24 volts input, which is usually tied to a call for fan on a Carrier, and the output wires going to the damper motor. Of course, 24 volt common is there as well.

    No W call wires.
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    2 Tim 3:16-17

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  6. #5
    Join Date
    Nov 2006
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    Southeastern Pa
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    How about the full model and serial, and a pic or two?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

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  7. #6
    Join Date
    Dec 2007
    Posts
    7,217
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    Quote Originally Posted by BBeerme View Post
    Isn't the W7220 the control module for the economizer? If so, any color of wire may be used.

    Plus, that control module never sees a signal from the heating side of the thermostat, it is for an economizer which only deals with cooling.
    Quote Originally Posted by timebuilder View Post
    Correct. We typically buy the Jade package as a retrofit for Carrier economizers, and once in a while, an older York Predator model. The newer Yorks use a JCI communicating module for their econ system.

    The only wires connected to the jade are the sensor inputs, the 24 volts input, which is usually tied to a call for fan on a Carrier, and the output wires going to the damper motor. Of course, 24 volt common is there as well.

    No W call wires.
    What they said!

    The newer 2 ton Carrier RTUs are a bit different than their others as far as wiring, but as stated no heat call is needed, just fan/occupied.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
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