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-   -   Settings for using Honeywell TH8321 thermo on Trane XL14i (https://www.askmehelpdesk.com/showthread.php?t=520562)

  • Oct 26, 2010, 05:06 PM
    ebgwd
    Settings for using Honeywell TH8321 thermo on Trane XL14i
    I bought a Honeywell Th8321 u1006 for my Trane XL14i heatpump. It has worked fine this summer and works great for this fall. The option I would like to figure out and change is the heat strips. They come on when the unit demands heating mode. They come on about 2 or 3 minutes after the heat pump comes on. Even with outside temp 60 degrees and indoor temp deviation of 1 degree from indoor target temp. If someone is familiar with the function settings, I can list what I have set, currently.

    Any ideas on what to try?
    Thanks
  • Oct 26, 2010, 05:11 PM
    Joshdta

    Do you have it set for econome or comfort?
  • Oct 26, 2010, 06:19 PM
    ebgwd
    There are "Functions" that can be set. The owner's manual has a small list of Functions. The install manual has a more complete list of Functions.
    Which Function is the econ or comfort function? Here is a list.
    0120 Set Year
    0130 Set Year
    0140 Month
    0150 Date
    0160 Schedule Format
    0170 System type
    0180 N/A Fan control
    0190 Changeover value
    0200 Aux heat type
    0210 Ext fossil fuel kit
    0220 1st stage comp cycle rate
    0230 2nd stage comp cycle rate
    0240 1st stage heat cycle rate
    0250 2nd stage heat cycle rate
    0260 3rd stage heat cycle rate
    0270 Emerg heat cycle rate
    0280 backlight
    0300 Manual/Auto changover
    0310 Auto changeover deadband
    0320 Temp display (F or C)
    0330 daylight savings
    0340 Remote sensor **** could this be a answer (short circuit?)
    0350 Heat pump comp lockout
    0360 Heat pump aux lockout
    0380 Dehumid control
    0500 Furn filter reminder
    0510 Humid pad change reminder
    0520 UV lamp change reminder
    0530 Adap Intelligent Recovery
    0540 Program periods
    0580 Comp protection
    0600 Heat temp range stop
    0610 Cool temp range stop
    0640 Clock format
    0650 Extended fan timer - heat
    0660 Extended fan timer - cool
    0670 Keypad Lock
    0680 Heat temp control
    0690 Cool temp control
    0700 Temp display offset
    0710 RESET
    REF: Honeywell Installation Guide for VisionPRO TH8000 Series
    My thermostat is the TH8321U 1006
  • Oct 26, 2010, 06:22 PM
    Joshdta

    360 locks out the heat strips,
    And then 240 threw 270 is how many time a hr the heat strips will come on.
    530 adaptive int may also make the heat strips run more.
    Do you have a out door temp sencer?
    And is 200 set to electric?
  • Oct 26, 2010, 07:01 PM
    ebgwd
    Comment on Joshdta's post
    I do not have the optional outdoor temp sensor. 200=0=electric The unit knows I don't have the sensor, so Function 360 is not available. Getting the wires to the thermostat will be a pain.How about a small switch on thermo
  • Oct 26, 2010, 07:02 PM
    ebgwd
    Comment on Joshdta's post
    I tried cutting the 220v breakers to the heat strips off but apparently the control circuit is there too. Unit did not work with heat strip breaker off.
  • Oct 26, 2010, 07:04 PM
    ebgwd
    Comment on Joshdta's post
    There are 2 contacts on the thermostat where the opt outdoor temp sensor hooks up. Could I put something there to fool the thermostat to think the strips should not be on? I am in SC where it seldom get really cold.
  • Oct 26, 2010, 07:06 PM
    Joshdta

    No way to jump the wires as it just read ohms. You can take the 24 volt wire off the t-stat going to the heat strips if you like.

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