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    ike609's Avatar
    ike609 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jul 22, 2008, 03:09 PM
    ASYSTAT655A to White Rogers iThermostat
    I am changing from an ASYSTAT655A to a White Rogers iThermostat from TXU I have a heatpump system that was in the house when I purchased it.

    I am just trying to switch to the new thermostat is all!

    Original ASYSTAT655A


    New White Rogers iThermostat from TXU Similar to model: 1F85-275
    Manual for 1F85-275



    Thanks, Gary
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jul 22, 2008, 03:39 PM
    Quote Originally Posted by ike609
    I am changing from an ASYSTAT655A to a White Rogers iThermostat from TXU I have a heatpump system that was in the house when i purchased it.

    I am just trying to switch to the new thermostat is all!

    Original ASYSTAT655A


    New White Rogers iThermostat from TXU Similar to model: 1F85-275
    Manual for 1F85-275



    Thanks, Gary

    Here are some old wiring codes that may help you. You can see what the change overs are from old to new style. Everything you need should be on these. Since I am not there to help you figure it all out this is the best I can do. If you have any doupt as to the wiring test all circuits with a meter or follow them to where they land in the unit to verify what each wire is actually used for. I could guess but If you fried your new thermost or any other problems came up I do not want to be blamed.
    Attached Images
  1. File Type: pdf Older%20systems%20and%20base%20signals%20on%20newer%20ones.pdf (21.4 KB, 335 views)
  2. File Type: pdf heat pump wiring.pdf (13.3 KB, 328 views)
  3. File Type: pdf psp722e_heatpump.pdf (10.2 KB, 396 views)
    4. ike609's Avatar
    ike609 Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Jul 22, 2008, 04:58 PM
    Here is the book for the new thermostat I still can't seem to get it to do anything
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Jul 22, 2008, 05:48 PM
    You have two white wires. One of them usually is orange that goes to the O or orange for the reversing valve and I see that is not hooked up.

    BTW did you label the wires or just write down the color code because you have two white wires that I see and that could be part of the problem IF they were interchanged.

    This si why it is so important to label them exactly before removal. The only diagrams is what I have provided.

    How about a real model number for this White Rogers iThermostat
    ike609's Avatar
    ike609 Posts: 3, Reputation: 1
    New Member
    		  
    #5

    Jul 22, 2008, 07:11 PM
    Got it! Blown 5A fuse on the ac unit...

    I knew which white wire was which because one was longer than the other by quite a bit. After replacing the fuse the only thing was the blower was not blowing. I had 2 green wires as well swictched them and it worked perfect!

    Model # is 1F88-270

    Manual is located here! http://mythermostatonline.com/pdf/SuperStatSpecs.pdf

    Thanks for the help!

    Gary
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