Carrier 58MVP continuous fan speed adjustment needed..
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  1. #1
    Join Date
    Sep 2005
    Posts
    21
    i have a carrier 58MVP infinity heat/cool unit that has been on line for two months and i want to lower the continous fan speed similar to that which a friend has on his five year old 58MVB unit....when my unit is on AC, the blower really rolls and cools the house....when it hits the set point, it switches to coninuous fan as it is set up to do....but, the drop in air movement is like from 100% on AC down to 85% on continuous fan....my friend's unit goes from 100% on AC down to 15% on continuous fan....the local Carrier Distributor put both in and does has looked at my unit and says that he does not know how he could lower the fan speed or if it can be done.....thinks that maybe my friend's unit drops so much because it is a larger unit and house....both seem very comparable air movement, speed and noise on AC....i guess the big question is..."Can the 58MVP continous fan speed be adjusted?????,,if so, how?????..."....any inf on this would be appreciated...if the continuous fan speed could be lowered similar to my friends unit, this would be a very good system.

  2. #2
    Join Date
    Jul 2006
    Posts
    19

    Thumbs up

    Do you have the Infinity control?

    I thought my sales guy was handing me a line when he said he wouldn't purchase the furnace without the upgraded thermostat. After I thhought about it, I figured it wasn't too big of a price to pay for the added comfort I'd get.

    After 9 months with it, I highly recommend it.

    I can adjust my humidity in both winter and summer. It allows me to adjust the constant-on fan speed. It obviously has the usual set-back features. Plus, you can see fault codes, run times, cycle counts and static pressure. It tells you when to change your air filter based on static pressure. A feature I really like is the Smart Recovery. I tell it I want my home to be 72 in the winter when my family comes home and it measures the current temp and adjusts the time it will come on so it will be 72. No guessing by me, just pure comfort.

    If you already shelled out the bucks for the furnace and maybe even the AC, do yourself a favor and get the T-stat.

    -Lunk

  3. #3
    Join Date
    Jun 2003
    Location
    Hell Hole Swamp
    Posts
    4,180
    Stop running the fan continuously, especially in the cooling season, you are bringing a lot of the moisture that gets removed from the air right back into the home during the off cycle.

  4. #4
    Join Date
    Jul 2006
    Posts
    19
    Sorry, but air moving doesn't create water.

    The only way your air can be humid, is if it is actually already humid. Or are you saying that the fan is pushing water off the coil back into the house? If that's the case, why wouldn't it just drip down the condensate line like it does when the unit is on? The coil isn't cold forever, the time it would take it to cool down and not be an issue would be relatively short. No?

    Where would the additional water vapor come from?

  5. #5
    Join Date
    Sep 2005
    Posts
    21
    i don't understand how it generatres more moisture either...can you explain????.....as for the T-stat, my guys don't understand it yet...they just ordered one in to try to learn it....yes, i live in the sticks.....but i had heard that the new T-stat would give me control over "a lot of things" and will see if my guys have the new one in and if that is a way to be able to control the speed...especially if it generates humidity....

  6. #6
    Doesn't the fan button give you low, medium and high speeds to choose from?



  7. #7
    Join Date
    Jul 2006
    Posts
    19
    Mine is in the upper right hand corner of the Infinity control. Small button. Low/Med/High/Auto

  8. #8
    Join Date
    Jun 2003
    Location
    Hell Hole Swamp
    Posts
    4,180
    When the system shuts off the evaporator is still wet, and there is water standing in the drain pan, with the fan on this moisture evaporates quickly and is carried back into the conditioned space.

  9. #9
    Join Date
    Jul 2006
    Posts
    19
    In a properly installed system, how much water sits in the pan? Seems like you'd have more left in the bathroom, in the tub and on the walls and mirror than in the pan.

    But, I'm not a pro, just a homeowning guesser.

  10. #10
    Join Date
    Aug 2004
    Location
    Los Angeles, CALIFA
    Posts
    1,134
    If you do not have an Infinity Control And just a standard thermostat, you could toggle the fan off then on three times. You should hear the fan start to ramp up.
    Do as I say, not as I do

  11. #11
    Join Date
    Apr 2003
    Posts
    248
    xgpcer,

    I have the 58MVP as well. There are dip switches in the furnace that need to be set correctly for continuous fan speed. Did your installer look at them?

    What size of furnace is yours? Mine is a 58MVP-060 (60,000 BTUs). Different size furnaces have different settings available on the dip switches.

    The dip switch settings can often be overlooked. Mine was not set correctly by my installer, so I adjusted them myself.

    Also, if you have a more recent MVP furnace (70 series or higher), I really recommend getting the Infinity Control. I used to have the Thermidistat control on mine, but the Infinity is SO much better. You can adjust the fan speeds very easily from the control. Absolutely get the Infinity Control, believe me, you'll love it! You don't have to worry about the dip switches either as everything is setup from the control and the dip switches aren't used anymore.

    Regards,
    Ken

    [Edited by seadragon on 07-18-2006 at 09:21 PM]

  12. #12
    Join Date
    Feb 2006
    Posts
    108
    Not sure if this will work but I think some Carrier furnaces like the STA MXA or CVA you can change the cont fan speed by switching the fan switch at the Thermostat from ON to Auto and Back to on and tis will change cont fan speed. You need to do it quickly or the speeds will not change. Not sure if it works with a digital thermostat.

    Also check your furnace manual you will find plenty of info in there.

    The Carrier MVB is a newer model that replaced the MVP about a year ago. If you have the newer furnace board in your MVP you should look into getting the
    Carrier Infinity Controler, its a nice upgrade and works well with the furnace.

  13. #13
    Join Date
    Sep 2005
    Posts
    21
    OOPS...i have the 58MVB-060 and my friend has the 58MVP100...my themostat is not an infinty....but did follow-up on the manual and the on/off fan and did reduce my continuous fan speed tho i don't know that i got iy all the wat down....no hi,med,low settings tho, just fan on or fan off....i have heard of the famous "dip switches" but been scared off of trying them and expected my installer to know and adjust...he has been installing them for 16 years.....when initially choosing the furnace, the Bryant guy stated that he would show me how to adjust them if i went with his Bryant...still sounds like something i should try to get my Carrier HVAC guys to do...thanks ...appreciate the help from all...

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