Ohio New Series 7 048 with IntelliZone2

Discussion in 'General Discussions' started by Greg Brockway, Jun 26, 2024.

  1. Greg Brockway

    Greg Brockway New Member

    I had a AT048 for 29 years that I installed myself. It was very reliable.

    I was told the dampers will modulate. IE: be part way open.

    I have 3 wire dampers. 90 second time.

    They are either opened or closed. I think I was told wrong.

    I am not complaining. I would just like to know if it is working right.

    The house is very comfortable. It usually runs at a low speed all day.

    The best EER the old AT048 2 speed could do was 15.

    The new Series 7 is 12 speed.

    Compressor Speed EER
    1 40
    2 42
    3 30
    6 17
    9 19

    On a 90° day it mostly stays at speed 4. 769 watts.

    Most of the time the compressor turns on once per day.
  2. SShaw

    SShaw Active Member Forum Leader

    It's working as intended. Dampers are open/closed. I don't think there's any reason for them to modulate, as the fan modulates airflow with the compressor stage.
  3. Deuce

    Deuce Member

    It might be that the installer used the word modulate when he actually meant operating from closed to open.

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