Page 1 of 2 12 LastLast
Results 1 to 13 of 16

Hybrid View

  1. #1
    Join Date
    May 2007
    Location
    Columbia, SC
    Posts
    61

    Motor noise from Carrier Power Open/Power Close Dampers

    I have a Carrier Comfort Maker zone system that was installed in my house when it was built in 1997. These are the three wire power open / power close style dampers. When I had the system replaced, I replaced the zone board with a Honeywell HZ432 to accomodate the dual fuel setup, but we left the existing dampers.

    In any case, I went into the attic today and heard one of the dampers making kind of a clicking or chirping noise. The system was not running, and hadn't been running for a while.

    When I put my finger on the motors in each of the dampers, it felt like they were both running. The noisy one got quiet after I touched the motor. My question is this... do the damper motors continue to run all of the time, or should they time out or have a limit switch, so that the motor isn't running while the system is off or after the damper is in position?

    Thanks!

    Heath

  2. #2
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Once closed or open completely they should quit running.

  3. #3
    Join Date
    Oct 2010
    Location
    Baton Rouge, LA
    Posts
    1,114
    Quote Originally Posted by ar_hvac_man View Post
    Once closed or open completely they should quit running.
    I am going to disagree with you but thank you for your comment.

    In my opinion, it complete depends on the type of motor.

    Motors that control dampers are normally referred to as damper actuators.

    While some actuators will run as ar_hvac_man said, some actuators use pancake motors. These motors may keep coils energized 24/7 to keep the same position.

    Some actuators have spring loaded fail safes. If it fails it fails closed. These actuators may need to stay energized to keep the position.

    I think it really depends on the type of actuator you have controlling these dampers.
    If you're too "open" minded, your brains will fall out.
    Artificial intelligence is no match for natural stupidity.

  4. #4
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Ive been wrong before. At any rate they are 15 yrs old Id have them checked out.

  5. #5
    Join Date
    May 2007
    Location
    Columbia, SC
    Posts
    61
    Finally got up in the attic with a camera. Here are some pictures of the damper actuators. Does anyone know if they're repairable, or am I going to need to have them replaced?

    A video, mostly to hear the noise
    http://www.youtube.com/watch?v=fbLkr...ature=youtu.be

    and a couple of pics




    Thanks!

    Heath

  6. #6
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by PHRoberts View Post
    Finally got up in the attic with a camera. Here are some pictures of the damper actuators. Does anyone know if they're repairable, or am I going to need to have them replaced?

    A video, mostly to hear the noise
    It's toast!

    The good news is that most brands of damper motors will work with the existing dampers, so no cutting into the duct.
    If more government is the answer, then it's a really stupid question.

  7. #7
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    The root of the problem is that those particular actuators were not specifically designed to be powered all of the time, so they don't have any internal circuitry to keep them from continuously driving against the range stop.
    The original zone control panel they were used with would only power them open or closed for a minute or 2, then stop powering them until the next time their position needed to be changed.

    Most of the newer add on zone panels power the damper actuator one way or the other continuously.
    The newer actuators typically have circuitry built into them to prevent them from driving against the range stop constantly.

    Specifically I've had complete success with retrofitting EWC damper actuators on those dampers.
    They also give a nice red light/green light indication that they are fully to the closed or open position.
    If more government is the answer, then it's a really stupid question.

  8. #8
    Join Date
    May 2007
    Location
    Columbia, SC
    Posts
    61
    Quote Originally Posted by mark beiser View Post
    The root of the problem is that those particular actuators were not specifically designed to be powered all of the time, so they don't have any internal circuitry to keep them from continuously driving against the range stop.

    ....

    Specifically I've had complete success with retrofitting EWC damper actuators on those dampers.
    I was wondering about that. It seemed like a bad design for them to be running continuously. Is there a particular EWC unit that you would recommend that I suggest to my HVAC guy?

    I'm thinking he would be more likely to swap the entire damper out, which I assume would cost more - but if I can suggest something to him he's usually open to it.

    Heath

  9. #9
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by PHRoberts View Post
    Is there a particular EWC unit that you would recommend that I suggest to my HVAC guy?
    It is the EWC "MRK" motor replacement kit. It comes with mounting hardware for a number of applications, including a bracket that will be needed to secure it to the body of the damper assembly.
    If more government is the answer, then it's a really stupid question.

  10. #10
    Join Date
    May 2007
    Location
    Columbia, SC
    Posts
    61
    Quote Originally Posted by mark beiser View Post
    Specifically I've had complete success with retrofitting EWC damper actuators on those dampers. They also give a nice red light/green light indication that they are fully to the closed or open position.
    Thanks for the recommendation Mark. The EWCs have been working great for a few days now!

    Heath

  11. #11
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by PHRoberts View Post
    Thanks for the recommendation Mark. The EWCs have been working great for a few days now!

    Heath
    Great!
    If more government is the answer, then it's a really stupid question.

  12. #12
    Join Date
    Dec 2009
    Location
    B.C.
    Posts
    26
    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread.

    You can find the rules for posting and qualifications here.

    Additional infractions may result in loss of posting privileges.
    Last edited by jpsmith1cm; 05-03-2013 at 06:34 AM. Reason: non AOP Pro Member

  13. #13
    Join Date
    Mar 2003
    Posts
    1,234
    The damper actuators that Carrier has been using for the past several years are modulating and not full power open/close. They take a 24v signal and drive the damper to the needed position and then the 24v is de-energized until another call to re-position. Some dealers have used them on other than Carrier zoning systems and they will work for a time and them burn out.
    I only refer to this to make others on here aware of that so they don't install a new actuator only to have it fail. Always be certain of the type of system and controls you are working with.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event