White Rodgers Thermostat 1F95-1291 - Page 2
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  1. #14
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,584
    All VS blowers can accept a signal from a stat to slow down for dehumidification.
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    How many times must one fix something before it is fixed?

  2. #15
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,131
    Will the Goodman VS go over the "standard" 400cfm/ton if dehumidification is not needed? Say the day is dry and hot and the unit runs a runs a lot. Humidity is set at 50%, but since the unit has run so much that day the indoor humidity is actually 40%. Assume 2 ton condenser and a "3 ton/1200cfm" blower. Can the Goodman be set up to run the blower at the full 1200cfm (600cfm/ton) to maximize sensible capacity since dehumidification is not needed? How about running the blower @ 600cfm (300cfm/ton) on really muggy days or when the cycles are relatively short? It seems like the HVAC industry could really improve real world SEER ratings while maintaining comfort by dynamically adjusting CFM/ton depending on load conditions.

  3. #16
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,584
    Nope, none of them will do that. And at 1200 CFM, even when its low humidity in the house, you would lose capacity from the air moving through the coil too fast.

    Don't try to reinvent the wheel.
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    How-to-apply-for-Professional

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  4. #17
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,131
    Can somebody help me understand this about how the internal humidity control works? I'm not clear by reading the description what the difference between OC and OD is. OD can reduce the temperature by up to 3 degrees to dehumidify but OC cant? Neither mode will start the AC for dehumidification unless there is a call for cooling?

    Programmable Dehumidification Optimal Comfort
    Mode (OC) or Optimal Dehumidification (Od)
    – This
    item can be selected to OC (Optimal Comfort mode), Od
    (Optimal Dehumidification), or OFF.

    When Optimal Comfort (OC) is enabled, this feature automatically reduces
    indoor humidity with a call for Cooling if humidity is 2%
    above humidity setpoint. Humidity is set by pressing the
    Humidity key when in the appropriate mode, in this case
    Cooling, and pressing the up or down keys to set desired
    humidity (range 40% to 95%) level followed by pressing
    Humidity key again. This dehumidification feature uses
    less energy by maintaining temperature and dehumidify-
    ing only when a call for Cooling is required.

    Optimal De-humidification (Od) when enabled, this feature automatically
    reduces indoor humidity with a call for Cooling if humidity is 2% above setting.
    Humidity is set by pressing the HUMIDITY key when in the appropriate mode, in
    this case Cooling, and pressing the up or down keys to set
    desired humidity level followed by pressing Humidity key
    again. This dehumidification feature may use more energy
    by making dehumidification a priority initiating a call for
    cooling if humidity is 2% above desired setting. This
    feature may also over-cool the condition space by up to 3
    degrees to achieve the desired humidity level.

    (Note: Both dehumidification modes operate in Cooling mode only
    with a call for cooling)

  5. #18
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    4,872
    Quote Originally Posted by 54regcab View Post
    Can somebody help me understand this about how the internal humidity control works? I'm not clear by reading the description what the difference between OC and OD is. OD can reduce the temperature by up to 3 degrees to dehumidify but OC cant? Neither mode will start the AC for dehumidification unless there is a call for cooling?

    Programmable Dehumidification Optimal Comfort
    Mode (OC) or Optimal Dehumidification (Od)
    – This
    item can be selected to OC (Optimal Comfort mode), Od
    (Optimal Dehumidification), or OFF.

    When Optimal Comfort (OC) is enabled, this feature automatically reduces
    indoor humidity with a call for Cooling if humidity is 2%
    above humidity setpoint. Humidity is set by pressing the
    Humidity key when in the appropriate mode, in this case
    Cooling, and pressing the up or down keys to set desired
    humidity (range 40% to 95%) level followed by pressing
    Humidity key again. This dehumidification feature uses
    less energy by maintaining temperature and dehumidify-
    ing only when a call for Cooling is required.

    Optimal De-humidification (Od) when enabled, this feature automatically
    reduces indoor humidity with a call for Cooling if humidity is 2% above setting.
    Humidity is set by pressing the HUMIDITY key when in the appropriate mode, in
    this case Cooling, and pressing the up or down keys to set
    desired humidity level followed by pressing Humidity key
    again. This dehumidification feature may use more energy
    by making dehumidification a priority initiating a call for
    cooling if humidity is 2% above desired setting. This
    feature may also over-cool the condition space by up to 3
    degrees to achieve the desired humidity level.

    (Note: Both dehumidification modes operate in Cooling mode only
    with a call for cooling)
    OC only slows the blower.
    OD slows the blower, and turns the ac on if there is a call for dehumidification.

    "operate in cooling mode" means if you have the thermostat set for "heat" then it doesn't work at all.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  6. #19
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,774
    Twilli told me he accomplished this by swapping his 4 legged hamster, with a 3 legged one in the blower wheel and it worked great for humidity control.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  7. #20
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    I installed 2 of these thermostats along with Evergreen ECM motors. The Evergreen has the advantage of using low voltage signals to control speed rather than the high voltage motor leads so "rigging" up a relay to slow the blower is simplified.

    Overall it seems to work pretty well. I like the thermostat interface better than my VP IAQ and it seem to control temperature just as tight without all the additonal installed settings the VP has.

    The furnaces are only 7 years old, so it could be a while to wait for it to fail.

  8. #21
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,774
    Quote Originally Posted by motoguy128 View Post
    I installed 2 of these thermostats along with Evergreen ECM motors.
    Your words in red is why you made this conversion, if a home owner with limited knowledge had to hire a service company to perform this for them, the amount a service company would have to charge, you could almost buy a new VS furnace.
    Those Genteq motors are not cheap.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  9. #22
    Join Date
    Sep 2010
    Location
    miami,fl.
    Posts
    602
    Quote Originally Posted by Mr Bill View Post
    Twilli told me he accomplished this by swapping his 4 legged hamster, with a 3 legged one in the blower wheel and it worked great for humidity control.
    hahahaha.

  10. #23
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,131
    Got my 1F95-1291 installed, awesome thermostat so far. As an added bonus I love the big blue display, it just looks cool.

  11. #24
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Quote Originally Posted by 54regcab View Post
    Got my 1F95-1291 installed, awesome thermostat so far. As an added bonus I love the big blue display, it just looks cool.
    It makes a great nightlight too!

    I continue to like how it operates better than my VP IAQ. Very quick and easy to get to the installer settings and the systm keeps running while you makes changes.

  12. #25
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,131
    Quote Originally Posted by motoguy128 View Post
    It makes a great nightlight too!

    I continue to like how it operates better than my VP IAQ. Very quick and easy to get to the installer settings and the systm keeps running while you makes changes.
    As an added bonus you can even take it off the wall to do programming. Could be handy in some situations.

  13. #26
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Very handy. You can find a nice comfy chair and a cup of coffee to do the programming. then just calibrate the themp and humidty readings as needed and you're good to go.

    The first unit I was sent had some inconsistent humidity readings so I returned it. the new one is better. Part of it is the location. I still haven't gotten around to addign the remote indoor sensor for my upstairs unit.

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