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  1. #14
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,060
    Quote Originally Posted by Aaron_FL View Post
    I thought the XL16I in Comfort R mode ran 50% for the first minute, 80% for the next 8 or so, and then 100% until the call for heat is satisfied?

    This is not the case? I see in the post from second opinion it will go back and forth from first to second stage as needed?

    Thanks for the clarification.
    There is nothing mentioned about Comfort R in the post. You only get one ramp cycle per cooling or heating call from Comfort R, after that it will change to 80% for first stage and increase to 100% for second stage depending on what the Tstat is calling for.

  2. #15
    Join Date
    Nov 2007
    Location
    Olympia, Wash.
    Posts
    192
    Quote Originally Posted by Nordic View Post

    0350 - Heat pump compressor lockout. The value set by installer was 45F (or 40F), I changed it to 15F

    0360 - Heat pump auxiliary lockout. The value set by installer was 40F (or 45F), I changed it to 25F
    I live in Olympia so same climate.

    On mine I set the heat pump compressor lockout (350) to 25 and the heat pump aux lockout to 30. I had it set at 35 and am now trying 30.

    My heating contractor also gave me the same story about "the system was set correctly." I knew it wasn't.

  3. #16
    Join Date
    Dec 2007
    Location
    Clearwater, FL
    Posts
    92

    wiring

    checking the wiring to confirm it is wired exactly as the diagram in the OUTDOOR unit specifies is important for the XL16i. I have seen soo many times where an installer follows the wiring found in the air handler or thermostat instructions and those are NOT correct. Wiring this perticular unit for a standard two speed set up will result in improper air flow during low speed. That unit is not 50/100 for capacity, it is 75/100. If the unit is wired wrong then airflow doesn't meet capacity. Just curious but why is the IAQ thermostat installed? Do you introduce outdoor air or have a whole house filtration system? Love the VisionPro t-stat for all the installer settings you can config. Also where did they install your outdoor temperature sensor for lockout, hopefully its not at the bottom of your heat pump.

  4. #17
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,913
    Quote Originally Posted by speedymonk View Post
    On mine I set the heat pump compressor lockout (350) to 25 and the heat pump aux lockout to 30. I had it set at 35 and am now trying 30.
    Set the compressor lock out to-10.

    Most heat pumps are still providing twice as much heat per dollar of electric consumed at 17*F then what electric strip heaters do.
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    How many times must one fix something before it is fixed?

  5. #18
    Join Date
    Dec 2007
    Posts
    6
    Quote Originally Posted by second opinion View Post
    with the 16i if you listen carefully you can hear the fan speed increase and decrease as it changes from first stage to second and back to first.
    I'm pretty sure I can hear different stages of the fan speed (it's more of a switch from louder to quieter and vice versa).

    Quote Originally Posted by hivacjack View Post
    ....also if you have a 3 Ton heat-pump Air Handler system with BAYHTR1415BRKR and have doubts about a flaky installer I would recomend verifying that your air handler's dip switch minimim air CFM setting is correct. BAYHTR1415 needs 1300-1400CFM minimum with your air handler when the heat pump is operating with the strip heaters. Thats a pretty high CFM for a 3 Ton unit and might explain the installers strange logic
    of locking out the HP at such a ridiculously high temperature. Check to see that dip switches 7 and 8 on the air handler are both set to OFF. (Actually I'd be interested to know from a serious TRANE guy if you'd actually get 1400CFM with the 037AH set to operate with a 3 Ton ODU.)
    I'm afraid this is well beyond my capabilities... unless there's a way to do it for someone without much of a technical knowledge / skill / tools / equipment.
    I suppose I could call a pro to verify that.

    Does anyone know more or less what would something like that cost?

    Quote Originally Posted by Hacker4573 View Post
    We only set the comp lockout on duel fuel systems and even then we set it a 35 to avoid numerous defrost cycles, as for the unit running along time just imagine if you were cooling on a 95 degree day the unit would run just as long, don't sweat the run times its supposed to run.
    I suppose you're right - with summers being so mild here I haven't experienced the unit running for so long last summer, but I'm pretty sure that it would have to had the temps gone so far up.

    Quote Originally Posted by primecooler View Post
    checking the wiring to confirm it is wired exactly as the diagram in the OUTDOOR unit specifies is important for the XL16i. I have seen soo many times where an installer follows the wiring found in the air handler or thermostat instructions and those are NOT correct. Wiring this perticular unit for a standard two speed set up will result in improper air flow during low speed. That unit is not 50/100 for capacity, it is 75/100. If the unit is wired wrong then airflow doesn't meet capacity. Just curious but why is the IAQ thermostat installed? Do you introduce outdoor air or have a whole house filtration system? Love the VisionPro t-stat for all the installer settings you can config. Also where did they install your outdoor temperature sensor for lockout, hopefully its not at the bottom of your heat pump.
    I do have the "CleanEffects" whole house filtration system but I wasn't sure that the choice of the thermostat was related to it. As far as I remember that's the thermostat that the contractor recommended with the particular system/setup he was installing.

    Unfortunately I have no idea where they installed the outdoor temp. sensor. How would I check it, i.e. what does it look like so I know what to look for?

    It starts to sound as if I really need to get a pro in to verify the wiring and dip switches settings mentioned earlier by hivacjack.

    The question is how do I find a reliable pro?

    I thought that the company that installed the system was one; they were authorized Trane dealer and even held the Trane Comfort Specialist designation and as it has already been determined, at least their lockout settings were incorrectly set (or at least not from the economical standpoint).

    Also - how much a service call like that can cost? I suppose that if I had someone come in and determine that the original installer did the wiring incorrectly I could try to recover the cost of that visit PLUS get the original installer to fix the problem. On the other hand - I'm not sure I'd trust them with it...

    For know, I'm closely monitoring the system and the energy usage and it seems to be working really well with the new settings (i.e. the house is warmer and I'm using less energy).

    Thanks again for everyone's help and input!

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