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  1. #1
    Join Date
    Jul 2004
    Posts
    253
    I have been watching my Evolution system for a couple of days now. A few observations: it does run for long periods of time at low-speed (a good thing, I preceive). It hasnt been able to get the RH down below 56% even with long, low-speed runtimes - it has been taking the temperature to 3 degrees below the set point (as it is suppose to ) but still cant get the RH down below 56%. The CFMs per zone are interesting to watch. I have seen it ramp down to 250 CFM (3 ton unit) total for just air circulation (no compressor ) and down to about 500 CFM in low-speed. My HVAC guy is still not sure whether the R-410a charge is OK. The lineset is 71 feet but he didnt have to add any R-410a based on the sub-cooling numbers - he doesnt think that sounds right and is working with tech support.

  2. #2
    Join Date
    Mar 2001
    Posts
    285

    try leaving the fan on AUTO while in cooling mode.

  3. #3
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    71 feet and how many elbows?


    Sorry ,I don't remember,was this new construction or a change out,and you location.

    And yes in mild weather leave the fan on auto,it seems to make a difference in our home.

  4. #4
    Join Date
    Jul 2004
    Posts
    253
    Originally posted by dash
    71 feet and how many elbows?


    Sorry ,I don't remember,was this new construction or a change out,and you location.

    And yes in mild weather leave the fan on auto,it seems to make a difference in our home.
    Hi Dash,

    There arent any real elbows - several sweeping curves perhaps. This is new construction in southeast GA (just north of Jacksonville). I have been leaving it on "auto" - tried setting the fan to a couple of different speeds when the compressor was off to see how the zoning algorithms behaved.

  5. #5
    Join Date
    May 2005
    Location
    toronto canada
    Posts
    25
    I don't deal with zoning very often so i have limited knowlege there,however i would find it hard to believe that the charge is ok if no refrigerant was added as i believe that the manufactures charge is only sufficient for 15 ft.Then .6 oz/ft required over that.thus approximately 33 oz should have been required!I would make sure the suction line is sized propperly.

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