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Thread: Air Handler ?

  1. #1
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    Air Handler ?

    I've got a 4 ton Trane xl16i 2 stage system with zone dampers so we are able to have 2 zones, upper and lower. I have a variable speed Trane AH and thermostat by honeywell.

    3 Q's

    My AH keeps the same speed if 1 or both zones are calling for air, thus resulting in a jet engine sound if only 1 zone is calling for air, but sounding fine when both zones are calling for air. Shouldn't the A/H speed change based on whether 1 or both zones are calling for air?

    the tech also told me to always leave the fan in the "on" rather than "auto" positions...does this make sense with 2 zones? wouldn't that by default cause both zones to get cooled air if 1 zone is calling?

    Lastly, a friend has the same unit (but only 1 zone) and his tech told him he must use the trane t-stat to work properly. I noticed that trane has a t-stat for 2 stage cooling...would that make a diff?

    Thanks in advance

  2. #2
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    Quote Originally Posted by njhusky View Post
    I've got a 4 ton Trane xl16i 2 stage system with zone dampers so we are able to have 2 zones, upper and lower. I have a variable speed Trane AH and thermostat by honeywell.

    3 Q's

    My AH keeps the same speed if 1 or both zones are calling for air, thus resulting in a jet engine sound if only 1 zone is calling for air, but sounding fine when both zones are calling for air. Shouldn't the A/H speed change based on whether 1 or both zones are calling for air?

    the tech also told me to always leave the fan in the "on" rather than "auto" positions...does this make sense with 2 zones? wouldn't that by default cause both zones to get cooled air if 1 zone is calling?

    Lastly, a friend has the same unit (but only 1 zone) and his tech told him he must use the trane t-stat to work properly. I noticed that trane has a t-stat for 2 stage cooling...would that make a diff?

    Thanks in advance
    let's assume you have a zone controller

    1.do you have a bypass damper, sounds like you need one, or the one you have needs adjustment

    2.depending on how your controller is wired it should go to low speed when 1 zone is calling provided the stat is not set too low

    3.dont leave fan to "on" unless if you want to bring up humidity level in your house which would be odd

    4.many different t-stats can be utilized with most zone controllers, so most likely you dont need a Trane t-stat



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  3. #3
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    The Trane stat is a rebranded Honeywell stat.

    Your zone panel and 16i are probably not wired right.

    Running the blower in the on position has no effect on the not calling zone when the other zone is calling. After the call though, both zones will even out in temp.
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  4. #4
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    I do have a bypass damper and zone controller (at least they are on my quote)

    Appreciate the help---I wish my Hvac co that I pay was as responsive as you guys here that provide me better info gratis...

    Note to any homeowners that read this site...get your referrals from people here...if they are willing to help people that don't pay them, imagine what they do for people that actually pay them. I wish I did

  5. #5
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    Quote Originally Posted by njhusky View Post
    IAppreciate the help---I wish my Hvac co that I pay was as responsive as you guys here that provide me better info gratis.

    donations are gladly accepted!

    see if you can post your invoice for the work done, blank out the name of the company and any prices!

    initially it sounds like you have a wanna-be zone system

    i am not trying to scare you but;

    an improperly installed wanna-be zone system can damage your equipment



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  6. #6
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    Airmechanical-here is the quote (without info)

    Here is the quote...appreciate any comments/suggestions/issues you or others see
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  7. #7
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    I don't see where it says anything about a bypass damper.
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  8. #8
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    Quote Originally Posted by njhusky View Post
    I wish my Hvac co that I pay was as responsive as you guys here that provide me better info gratis...
    I second that - we wish they were as responsive AND knowledgeable as the free help we get here!

    Dennis

  9. #9
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    Dwynne--looks like air mechanical is a Vol too.

  10. #10
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    Beenthere...good point--we did talk about it..i will double check

  11. #11
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    ya, you have a zone controller, but no bypass damper installed, unless they just installed it and did not list it!

    explain to your installing company about your jet sound coming out of the grills

    maybe they can adjust the controller so that if only 1 zone is calling then only low speed will run

    or they may decide either to adjust the bypass damper or install a bypass damper and set it up properly!

    also ask them to explain to you the operation of your 2 speed system

    mistakes are probably made daily on zone system's, it's complicated and only gets easier after each install

    there is 100 different ways to install and set-up zone system's, unfortunately only a few ways will work properly



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  12. #12
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    Quote Originally Posted by dwynne View Post
    I second that - we wish they were as responsive AND knowledgeable as the free help we get here!Dennis
    hey D, where you at in middle tenn. i am in cookeville



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  13. #13
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    [QUOTE=Airmechanical;1919843]
    explain to your installing company about your jet sound coming out of the grills

    you're funny...you mean you actually call your clients back after they pay you for a job...must be a southern thing

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