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  1. Did they check your static pressure? If so then...

    Did they check your static pressure?
    If so then post the numbers and you may get some insight to the howling noise as well as other potential issues.
    Key1
  2. Not sure if this has been mentioned...but if it...

    Not sure if this has been mentioned...but if it were me, I'd ask them to check my ESP (external static pressure) when they are done. That info will provide you quite a bit of insight on your install...
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    Apparently the few days I was in New Orleans, the...

    Apparently the few days I was in New Orleans, the summer vanished in NJ. It is currently 63F out and the forseeable future has lows in the upper 40's at night and high's in the 70's during the day. ...
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    Good insights. I am out of town a couple a days...

    Good insights.
    I am out of town a couple a days but will make some observations when I return...
    Key1
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    I ran a test this evening. We had the windows...

    I ran a test this evening. We had the windows open most of the day and closed them all just before sunset. About 8:30 PM the temp in the living room was 78F and the Humidity was 62%. I cut on...
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    OK?? Care to elaborate? Key1

    OK??
    Care to elaborate?

    Key1
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    Did Robo mention how he keeps the plexiglas (if...

    Did Robo mention how he keeps the plexiglas (if that is what he uses) from fogging up during operation so that he is able to see what is going on?

    Key1
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    Consider it clarified. Beenthere is correct. My...

    Consider it clarified. Beenthere is correct.
    My dips are set for 350 CFM/ton and I am slowed to 80% for humidity control....which is 280 CFM/ton.
    Key1
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    I am not clear on how I am outside of design...

    I am not clear on how I am outside of design parameters. I did not know there were parameters for the supply air temp other than don't let the coil freeze...that is why I asked if 41 is to low for...
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    My original plan was to bring it back to...

    My original plan was to bring it back to 320CFM/ton once we get through this spell of low heat load and high humidity (70F at night with 90+ percent humidity). However, it works so well this way,...
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    Not sure what you are saying that I should check...

    Not sure what you are saying that I should check from the statement quoted above....It appears to have been altered by the moderator.....but I assure you that the temperature measument is acurrate. ...
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    To reduce in-home Humidity from more than 65% to...

    To reduce in-home Humidity from more than 65% to less than 45% (it worked) and to reduce static pressure from 1.2 to 0.57...

    Key1
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    Thanks for the quick response... the comfort R...

    Thanks for the quick response...

    the comfort R feature is not enabled. It seems to get cooler and cooler the longer it stays on and it bottoms out at 41F. It used to bottom out at 43F...then...
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    Is supply temperature of 41F to low?

    The supply temp inside the trunk duct about 3 feet after the coil sometimes drops as low as 41 degrees.

    So far I have seen no indication of the E-coil freezing.

    Some Background: In April 2008...
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    In a nut shell, (to save reading of dozens of old...

    In a nut shell, (to save reading of dozens of old posts) My system was not sized properly or installed properly and I am uncertain if it was charged properly from the begining. For all I know the...
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    That's good to know. Thanks for the quick...

    That's good to know. Thanks for the quick feedback

    Key1
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    What about a drop from 400 cfm/ton down to...

    What about a drop from 400 cfm/ton down to 280CFM/ton for a 4 ton Trane XL15i??

    The installers originally left me set up on 400 CFM/Ton but esp was ~1.2.

    Now 1 year later....I run at 280CFM/ton...
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    What you may be calling an "AC" is the unit that...

    What you may be calling an "AC" is the unit that sits outide. However the "AC" requires some way of distributing the cooled air throughout the house. That way is typically a blower (fan) and the...
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    I think 3 cph idealy would correspond to 10...

    I think 3 cph idealy would correspond to 10 minutes on and 10 minutes off. Which makes 1 cycle and takes 20 minutes to complete. Since 1 hour is 60 minutes.....3 of these "cycles could occur in 1...
  20. I'm interested in the response you get on this...

    I'm interested in the response you get on this topic as I have a 4 ton XL15i outside and a 5 ton E-coil inside. I was told the larger indoor coil increases the efficiency. As far as the AC being...
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    I have posted that site in the past and was...

    I have posted that site in the past and was scolded for doing so since it is a DIY dite........

    P.S. you have no contact info in your profile....

    Key1
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    I do not beleive you will be provided a simple...

    I do not beleive you will be provided a simple answer.
    In my case for example, a new 5-inch General-Air media filter Merv 10 has a pressure drop of 0.14 at about 1450 CFM in my system while a new...
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    you both will probally have to list your model...

    you both will probally have to list your model numbers of your equipment and one of the knowledgeble people here that knows your brand will be able to tell you if it will work or not on your specific...
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    What type of Tstat do you have? Do you have one...

    What type of Tstat do you have? Do you have one where the cycles per hour can be adjusted? My Tstat allows for a setting of 1 - 6 CPH for cooling. I have mine set on 1cph to maximize humidity...
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    I read the OP's total square footage as...

    I read the OP's total square footage as 3000......but I get your point on 6 tons of cooling.
    Key1
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    To preview what added return may potentially do...

    To preview what added return may potentially do for you.....take your positive and negative esp readings. Prop your blower door open by about 1/3 and take them again, prop the door open by about 2/3...
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    I did quite a bit to get my static pressure down...

    I did quite a bit to get my static pressure down on my 4 ton system from a high of 1.2 to the 0.5 it currently operates at (on heating). It is 0.60 for cooling. By far the largest impact was...
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    You liked that huh? ;) Well here is part 2....

    You liked that huh? ;)

    Well here is part 2.

    http://hvac-talk.com/vbb/showthread.php?t=175955&page=4


    there is also a part 3 and 4 to finish up the series if you require additional...
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    Read the thread I linked below from the begining....

    Read the thread I linked below from the begining. If you still have questions I will provide an additional link for further enlightenment.

    http://hvac-talk.com/vbb/showthread.php?t=172134&page=6...
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    Post 44 in the attached thread links you to a...

    Post 44 in the attached thread links you to a video illustrating static pressure testing.

    Key1



    http://hvac-talk.com/vbb/showthread.php?t=278462&highlight=upstairs
  31. In addition to what Mark said.....I've learned...

    In addition to what Mark said.....I've learned not to run the fan all the time if you have an open fresh-air-intake when it is humid outside as that humidity is pulled right into the home between...
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    The fresh air intake is simply a 6 inch metal...

    The fresh air intake is simply a 6 inch metal duct connected through the outside wall and into my return drop prior to the filter.



    Thanks for sharing your knowledge....and for the education ...
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    Success!!!

    Thanks for all of your help.

    I woke up this morning and the outdoor conditions were 73F and 96% humidity.....while the indoor conditions were 73 and 47% humidity. I left the AC set on 73 all...
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    That's quite enlightening....I would of thought...

    That's quite enlightening....I would of thought that if a home is leaky, it is leaky regardless of the outdoor temperature. I would not of guessed that the same gaps allow more infiltration in...
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    I have taken your advice and reconnected my fresh...

    I have taken your advice and reconnected my fresh air intake.




    I have also set the blower to auto....

    Hopefully the combination of the redcuced airflow (280CFM/Ton) and switching the...
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    His quote is below...

    His quote is below...
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    Too high of an airflow is not effective at...

    Too high of an airflow is not effective at reducing humidity. Said another way, the lower I can run my airflow the better humidity removal....something to do with the E-coil geting colder and...
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    One final piece of data and then I return you...

    One final piece of data and then I return you your thread. :)

    After leaving the system completely off for an hour, humidity jumped up to 52% from the 45% I had gotten it down to......after the...
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    I have now run the system this way for ~ 4 hours...

    I have now run the system this way for ~ 4 hours before shutting it off by turning the temp up on the tstat.

    The final humidity averages 45% throughout the 2-story 2800 sq. ft. house. The final...
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    I am one state down in NJ and for the first time...

    I am one state down in NJ and for the first time since my Trane XV95/Xl15i system was installed (2008)....I am struggling with indoor humidity also. I am accustomed to ~ 50% humidity but for the...
  41. Thread: ESP

    by key1cc
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    Thanks. Your answers are confirming what I have...

    Thanks.
    Your answers are confirming what I have learned but it does not hurt to get multiple opinions. I have already converted from a ~24x16 1" filter for my 4 ton system to a 25 x 20 5" media...
  42. Thread: ESP

    by key1cc
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    Thanks for elaborating. This seems to make since...

    Thanks for elaborating.
    This seems to make since to me for designing a sytem.

    I see from your profile that you are a HVAC Instructor so I will pose my specific question, then return the thread to...
  43. Thread: ESP

    by key1cc
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    Can you elaborate on what you mean by "crediting"...

    Can you elaborate on what you mean by "crediting" a bit?
    Thanks

    Key1
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    I actually went the "Dash suggested Route" and...

    I actually went the "Dash suggested Route" and modified my duct work. My return drop was originally 24 x 10 and I replaced it with a 24x 20 and added a horizontally mounted filter media cabinet. ...
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    Correct...no purging :o...I edited the post.......

    Correct...no purging :o...I edited the post....

    Key1
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    Great Video. My installers don't subscribe to...

    Great Video.

    My installers don't subscribe to the Nitrogen camp :(.

    I'll pass this link on to them..... maybe some future HO's can benefit..

    P.S. Is there anything that can be done after...
  47. My objective is to learn as much about my system...

    My objective is to learn as much about my system as I can, primarily driven by the lack of "correct" knowledge that I continue to encounter with the local contractors that I have had discusions with....
  48. Not sure what the PM feature is that you are...

    Not sure what the PM feature is that you are referencing...How would I turn it on?
    Key1
  49. Well, I finally got the follow up vist from my...

    Well, I finally got the follow up vist from my BPI anaylyst (yesterday). As impressed as I was in my first post....I am equally disapointed in this one. I was expecting a nice comprehensive report...
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    Is the underlined sentence in red above...

    Is the underlined sentence in red above referencing installs performed by "do-it-yourselfer's" or by homeowners hiring contractors or both? Do we know?

    Key1
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