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  1. #14
    Join Date
    Jun 2007
    Location
    Round Rock
    Posts
    3,660
    Quote Originally Posted by beenthere View Post
    There is no true max.
    Yes, my unit is over sized by many peoples standards.
    But with some tweaking. It works the way I like it, and keeps my humidity under 50%.

    The amount of time I have setting it up. Most people wouldn't want to pay for.

    Not to rub it in too much.
    But if it was 100 out, I could get my place down to 70. I'd have to bring my blower speed back up, past 400 CFM per ton though.
    I barely do 320 per ton now.
    I tweak on mine too, depending on what the outside temp is. Right now I'm running at about 1100 CFM for a 3 ton. It's 100 everyday here. When its in the low 90's and 80's. I'll get it down to about 900 cfm for my 3 ton. It works great, lowers the bill substantially and controls humidity great. It's a Trane 80 furnace, variable speed with 3 ton coil matched to a 10 year old Janitrol. Runs like a champ. I know its mismatched, but I do it for a living and it works great.

  2. #15
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,789
    I'm at 800CFM for 2.5 ton.
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    How many times must one fix something before it is fixed?

  3. #16
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,789
    Quote Originally Posted by Clorox View Post
    1) I should have gone to 3.5 tons.

    2) I should have added a return vent in my hallway, right above my thermostat. (suck the trapped heat out)
    Matbe the return.
    But doubtfull on teh 3.5 ton.

    Just call your contractor so he can come out and fix whats wrong.

    I have 2.5 tons for 1650 sq ft. But I got shade.
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    How many times must one fix something before it is fixed?

  4. #17
    Call the contractor......it's their problem. And 73 for the cooling is about perfect.....wonder what Mr. Bill keeps it at during heating season?...80?

  5. #18
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Quote Originally Posted by Clorox View Post
    A difference of 26 degree's? How? Oversized? Too much freon?

    I thought a differential of 20 was the max?
    20 is the norm,but what it's designed to do is the max,down to a point.

  6. #19
    Join Date
    Jun 2008
    Posts
    34

    Unhappy

    5:00pm 2nd floor, bedroom doors open
    outside = 87
    inside = 74 (lowest possible)
    difference = 13


    7:00pm 2nd floor, bedroom doors open
    outside = 84
    inside = 72 (lowest possible)
    difference = 12


    9:00pm 2nd floor, bedroom doors closed
    outside = 80
    inside = 72 (lowest possible)
    difference = 8


    10:30pm 2nd floor, bedroom doors closed
    outside = 74
    inside = 71 (lowest possible)
    difference = 3


    Looks like regardless of outdoor temp, inside will not drop below 72?

  7. #20
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,789
    I hope you already placed your service call.
    You don't want to be running it with a low charge and damaging and voiding your warranty.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  8. #21
    Join Date
    May 2005
    Location
    Lake County,Illinois
    Posts
    38

    68 in dead of summer

    There are two customers who keep their t-stat set to 68 in the summer cause they like it cold whn we did the install we went to a five ton from a four ton added more return and supplies i cant believe it when ive gone there program set to 68 and customer has no concern friggin thing must never shut off!

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