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  1. #1
    Join Date
    Apr 2008
    Location
    Orange County, CA
    Posts
    42

    Carrier Infinity control lowest humidity setting 46%

    Well, I just had the complete Infinity system installed, AC, Furnace, and Control. The unit is communicating and reading correct outdoor temp. I have set the basic Himidity setting to one bar/one box on the left. In advanced, the lowest it will let me set it is to 46% which is also all the way to the left. The actual humidity reading is off, so it would be nice to use the setup option of off-set to correct this. But because of the off-set error on the high side, I can't even use it to get much below the reported target of 46%.

    So my question is why is the lowest target setting possible only 46%? I bought this system so I could at least try to get the condo down to 35% humidity, but this won't even let me set it that low. Am I missing something in the setup or configuration?

    Please help as this is very important to me and the reason I spent thousands extra...

    Thanks,

    Keith

  2. #2
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347
    Quote Originally Posted by OldSoCalCondo View Post
    Well, I just had the complete Infinity system installed, AC, Furnace, and Control. The unit is communicating and reading correct outdoor temp. I have set the basic Himidity setting to one bar/one box on the left. In advanced, the lowest it will let me set it is to 46% which is also all the way to the left. The actual humidity reading is off, so it would be nice to use the setup option of off-set to correct this. But because of the off-set error on the high side, I can't even use it to get much below the reported target of 46%.

    So my question is why is the lowest target setting possible only 46%? I bought this system so I could at least try to get the condo down to 35% humidity, but this won't even let me set it that low. Am I missing something in the setup or configuration?

    Please help as this is very important to me and the reason I spent thousands extra...

    Thanks,

    Keith

    are you trying to grow dust mites?

    35% is too low!



    .



    .

  3. #3
    Join Date
    May 2008
    Location
    newnan,ga
    Posts
    57
    45-50% good range

  4. #4
    Join Date
    Apr 2008
    Location
    Orange County, CA
    Posts
    42
    My Condo is at 50% now but in various places I get mold and mildew. I would be happy if I actually got the house down to 40%. I can ramp the humidity up once I get rid of the problem and I find the point where it doesn't return.

    But that is not the point. I can't even set it for 45%?!? So far I can only set it for 46% and because of the my other three humidity sensors say the carrier reading is wrong, I can't even hit 46%. So before Carrier Infinity 50%, after Carrier Infinity 50%. I feel I wasted my money. Although I am happy for the quieter fan, but...

    Anyway, can it not be set below 46%?

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,064
    One of the Infinity guru's will come along soon.
    Which Infinity system did you get, is it the 2 stage.
    Contractor locator map

    How-to-apply-for-Professional

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

  6. #6
    Join Date
    Nov 2003
    Posts
    100
    Quote Originally Posted by Airmechanical View Post
    are you trying to grow dust mites? 35% is too low!
    High humidity is needed by dust mites. Below 50% really inhibits them. The health problems associated with very low humidity are due to over-drying of respiratory epithelium.

    In order to keep some parts of the home below 50% it seems like the OP ought to be able to make the set point below 46%. In order to “cure” the existing mold problem OldSo ought to keep it pretty low for a few weeks.

    It is not clear to me if the control can not be set below 46%, which would be stupid, or the system can not achieve below 46% which would be understandable depending on the temperatures and heat gain of the condo.

  7. #7
    Join Date
    Mar 2008
    Location
    Northern Virginia
    Posts
    209
    Quote Originally Posted by sneezer View Post
    High humidity is needed by dust mites. Below 50% really inhibits them. The health problems associated with very low humidity are due to over-drying of respiratory epithelium.

    In order to keep some parts of the home below 50% it seems like the OP ought to be able to make the set point below 46%. In order to “cure” the existing mold problem OldSo ought to keep it pretty low for a few weeks.

    It is not clear to me if the control can not be set below 46%, which would be stupid, or the system can not achieve below 46% which would be understandable depending on the temperatures and heat gain of the condo.
    GO PRO

    Well said..the control will run the a/c at lower stage and fan speed to remove more humidity but it wont allow the system to cool past 70,, in the summer it is usually difficult to reach below 50% humidity in my area, and the tightness of your house and ducts must be addressed..you can have a carrier rep come to your home and inspect your equipment...dont worry, be happy you have one of the most advanced systems on market, make sure all other possibilities are checked out because ive seen this system in action and have several happy customers.


    and it doesnt go below 46% because thats extreme for summertime
    Last edited by acmanhoney; 05-21-2008 at 07:03 PM.

  8. #8
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    HVAC systems are not engineered for the dehumidification that you desire. Thus, the Infinity UI does not allow 'overcooling' to dehumidify below 46%.

    Hopefully, you weren't sold this system with a promise of 35% RH.

    Unless you add a separate dehumidifier, it ain't gonna happen.

    You need to address the envelope leak issues in your home and duct system.

    Perhaps a stand alone dehumidifier to dry the home after the home and duct system are sealed properly.
    Perhaps you should have read the instructions before calling.

  9. #9
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    Quote Originally Posted by sneezer View Post
    High humidity is needed by dust mites. Below 50% really inhibits them.

    wrong!



    .

  10. #10
    Join Date
    Apr 2005
    Location
    Kingston Ontario Canada
    Posts
    1,211
    Quote Originally Posted by jrbenny View Post
    HVAC systems are not engineered for the dehumidification that you desire. Thus, the Infinity UI does not allow 'overcooling' to dehumidify below 46%.

    Hopefully, you weren't sold this system with a promise of 35% RH.

    Unless you add a separate dehumidifier, it ain't gonna happen.

    You need to address the envelope leak issues in your home and duct system.

    Perhaps a stand alone dehumidifier to dry the home after the home and duct system are sealed properly.
    JR Benny is right, "if" you have your control mode set to cool to dehumidify. This is where the dehumidification set point comes into play and does not allow ovecooling by more then 3 degrees while attempting to satisfy a dehumidify demand. If you use the "normal dehumidification operation" this will allow a lower cooling set point and you should be able to achieve a lower % dehumidification. I'm not stating that you can reasonably reach 35 % set point, though. But it's worth a try.

    thorton
    ____________________
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  11. #11
    Join Date
    Apr 2008
    Location
    Orange County, CA
    Posts
    42
    OK, I understand the system won't cool too much to reach the desired dehumidification. In fact the manual as much as states that when the talk about the two modes of dehumidification. The normal(off), and the humidification mode (on) where it will go up to five degrees past the set point to try to reach the target humidity level.

    If I set it to a low number and it doesn't make it, then I will say at least I tried the best. I mean they do sell this system as being able to control humidity. I forget the marketing term.

    I understand there is only so much the system can do. And obviously if I set it to 15%, it won't be able to do without a dedicated dehumidifier. The question and the point is that I can't even set it to 45%. Is even 45% too low to be able to set it to?

    So to answer the questions, it is a two stage two ton Infinity condenser, matched to a 80% Infinity Furnace, with Infinity control. The system was just installed brand spanking new. I tried the Dehumidify setting to On, which allows it to go up to five degrees past the set point, and the Off setting, which is like a normal setting. In both cases I can only set it to a target of 46%. As far as I know there are three places that control the setting. In basic there is the bar graph, no numbers shown, in Advanced there is a bar graph that shows numbers That go from 46% in steps of 2% to I think the high of 54%. And then in the initial system install mode there is a Off-set of plus or minus 10%. But I believe this is meant to calibrate the humidity reading to a correct or differential reading. Because the reading is off, I am able to use this but only to gain a few more lower humidity percentages. But this setting doesn't change the low set point of 46%. Does that all make sense?

    What doesn't make sense is that Carrier would say the lowest a home owner can or should set the Humidity level to is 46%. I mean why not 45%? I feel I have been very thorough, but I must be missing something???

    Thanks for the help.

  12. #12
    Join Date
    Mar 2008
    Location
    Northern Virginia
    Posts
    209
    the unit helps control humidity but its still an a/c, you could have a leaky pipe.

    when you set it at 46% does the unit cool past your set point and how much?

    if you wanted it below 46 it would not cycle off, so if you wanna try and get it below 40% your house will be very cold, its designed for cooling the humidity stuff are features.

  13. #13
    Join Date
    Jul 2007
    Posts
    122

    Talking humidity setting

    I have a Nordyne IQ Drive which has a humidity setting down to 30%. I keep it set at 40% and measure the RH at 43 to 44%. This keeps my home very cool, so I have not tried to set it any lower. It goes in 5 deg steps so I could set it at 35 or 30%, but don't know if it would drop any lower without dropping the temp to an uncomfortable degree. I live in SE Florida with very high humidity levels, so 30% may not be atainable. ibis

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