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  1. #14
    Join Date
    Jun 2008
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    13
    When you say have them check system operation are you talking about refrigerant charge (has 410a)?

  2. #15
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,564
    Yes, system charge. Plus verify correct air flow. Not just slow the blower and say see if that works.
    He should check to make sure the coil is basically the same temp from one end to the next.
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  3. #16
    Join Date
    Jun 2007
    Location
    Logansport, IN
    Posts
    20
    Did the installer do a load calc? Maybe the unit is over sized? Is the unit short cycling????

  4. #17
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
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    6,058
    i don't get it. Ever since VS became such a high demand item I have never heard so many complaints about high humidity.

    Both White Rodgers and Honywell and some stats available at HD and Lowes
    have a selectable humidity level control as part of the configuration.

    Ain't nobody smart enough to offer them at the time of sale?

    I push the hell out of the W/R stats. And on top of that the equipment I sell has a fifteen minute dehumidy selection that slows the fan down.

    Some body ain't doing their job.

  5. #18
    Join Date
    Feb 2008
    Location
    Western NC
    Posts
    2,504
    Quote Originally Posted by hvaclover View Post
    i don't get it. Ever since VS became such a high demand item I have never heard so many complaints about high humidity.

    Both White Rodgers and Honywell and some stats available at HD and Lowes
    have a selectable humidity level control as part of the configuration.

    Ain't nobody smart enough to offer them at the time of sale?

    I push the hell out of the W/R stats. And on top of that the equipment I sell has a fifteen minute dehumidy selection that slows the fan down.

    Some body ain't doing their job.
    What equipment do you speak of with a 15 minute dehimidify selection???
    I fully support the military and the War on Terrorism.


    If you don't know, then don't do. If you don't know and still do, then be prepared to pay someone else a lot to undo what you did and then do it right.

    If you do know, then do. But do it right. Otherwise, you may not be doing it long.

  6. #19
    Join Date
    Jun 2008
    Posts
    13
    He installed a Honeywell VisionPRO IAQ touchscreen thermostat, hvaclover do you know if it has the fifteen minute dehumidify selection that slows the fan down?

  7. #20
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,564
    Hold it, you have an IAQ stat.

    If you have a VS blower, it can slow the blower. It can also do cool to dehumidify.
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  8. #21
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
    Posts
    6,058
    Quote Originally Posted by upmike View Post
    He installed a Honeywell VisionPRO IAQ touchscreen thermostat, hvaclover do you know if it has the fifteen minute dehumidify selection that slows the fan down?
    The dehumidifying feature , if your stat has it (some do some don't0 should be wired in to your VS blower assuming it is set up up for it.

    I sell Westinghouse and and with a W/R stat I can set up a TXV system to maintain a certain level of humidity in the home, as well as control humidity
    for winter heating.

  9. #22
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    68,564
    Quote Originally Posted by hvaclover View Post

    I sell Westinghouse and and with a W/R stat I can set up a TXV system to maintain a certain level of humidity in the home, as well as control humidity
    for winter heating.
    Yea. well I sell York, and with a Honeywell IAQ thermostat, I can make it turn on the dishwasher weather or not the customer has a VS blower. ROFL
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  10. #23
    Join Date
    Jul 2006
    Location
    NW burbs of Detroit
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    Quote Originally Posted by beenthere View Post
    Yea. well I sell York, and with a Honeywell IAQ thermostat, I can make it turn on the dishwasher weather or not the customer has a VS blower. ROFL
    Give it a couple more years and all the York Mods will be for sale on EBay just Like the Triathlons.

    Boy I am glad I did not pay the buy in cost on THAT program.

  11. #24
    Join Date
    Nov 2004
    Location
    Austin, TX
    Posts
    886
    Many times the furnace or airhandler can be used with different capacity condenser units.
    It needs to be set according to the capacity of the condenser unit.
    Most furnaces are set to run on high to cool, this may be too fast for the capacity of the air conditioner. The installer must set the speed of the furnace or airhandler to match the condenser. If he doesn't, it won't dehumidify well. He should measure the amount of static pressure in the ductwork to make sure it's set correctly. Ductwork that is too small or has problems will increase the static pressure and modify the required speed setting required by a multispeed motor. A variable speed (VS) motor will move enough air once it has be been set by the control board. A VS motor will have a shortened lifespan if used in a system with excessive static pressure.
    Just slowing the blower speed down may correct the humidity problem but won't detect future problems created by undersized ductwork.

    You paid someone to put it in, let them fix it. If it has ductwork issues, they can document them and you can budget to get them fixed in the near future. I
    “I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.”
    ― Benjamin Franklin

  12. #25
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    68,564
    Quote Originally Posted by hvaclover View Post
    Give it a couple more years and all the York Mods will be for sale on EBay just Like the Triathlons.

    Boy I am glad I did not pay the buy in cost on THAT program.
    hey, I think theres still 2 Triathalons running.
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  13. #26
    Join Date
    Apr 2005
    Location
    Kingston Ontario Canada
    Posts
    1,221
    Quote Originally Posted by hvaclover View Post
    i don't get it. Ever since VS became such a high demand item I have never heard so many complaints about high humidity.

    Both White Rodgers and Honywell and some stats available at HD and Lowes
    have a selectable humidity level control as part of the configuration.

    Ain't nobody smart enough to offer them at the time of sale?

    I push the hell out of the W/R stats. And on top of that the equipment I sell has a fifteen minute dehumidy selection that slows the fan down.

    Some body ain't doing their job.
    I agree, hvaclover, I have a Carrier Thermidistat with seperate dehumidification and humidification set points with VS and I get terrific dehumidification. Last night it was 81 degrees F at 10PM inside my home and I fired up my heat pump in cooling mode and within 45 mins the RH dropped from 56% to 43% and sensible temp went from 81 to 73 in 4 hours. I have a selection called "super dehumidification" which slows the blower down further. I noticed last night the blower ran quite slow untill the RH was under control and then blower speed increased to tackle the sensible load.

    thorton
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