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  1. #1
    Join Date
    Jul 2010
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    40

    Where can I find this?

    Anyone know where I can find an actuator for the low ambient dampers on an old Trane CGAE-C40. The Robert Shaw model number is P020-2202?

    Here is a link to a cut sheet.

    http://www.icca.invensys.com/UNILINE/d/d109.pdf

    I got it from a google search, but I haven't found a place to order one.

    The Robert Shaw number crosses to a Uni-Line order number 3520-022

  2. #2
    Quote Originally Posted by kwaichang View Post
    Anyone know where I can find an actuator for the low ambient dampers on an old Trane CGAE-C40. The Robert Shaw model number is P020-2202?

    Here is a link to a cut sheet.

    http://www.icca.invensys.com/UNILINE/d/d109.pdf

    I got it from a google search, but I haven't found a place to order one.

    The Robert Shaw number crosses to a Uni-Line order number 3520-022
    Have you considered a vsd on the fan or a fan cycling switch those dampers are bad to leak refrigerant out of the bellows.

  3. #3
    Join Date
    Jun 2010
    Location
    U.A. (upper Alabama)
    Posts
    835
    Trane recommends changing it to an electric actuator. You have to add a sat. cond. temp. sensor and the module I think. I believe it's pretty expensive though. I found a similar actuator but the stroke was like an inch shorter, if I remember correctly, but I made it work. I don't think you can find that actuator any more.

  4. #4
    Join Date
    Jun 2003
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    in a tree looking in your window
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    1,158
    there is one on ebay for about 350.00
    If you dont stand behind our troops, please feel free...........to stand in front of them.

  5. #5
    Join Date
    Jul 2009
    Location
    In a mechanical room....
    Posts
    1,887
    Why oh why not go with vfd
    “It takes courage to grow up and turn out to be who you really are.”

    - E.E. Cummings

  6. #6
    Join Date
    Jul 2010
    Posts
    40
    Quote Originally Posted by cperk View Post
    Trane recommends changing it to an electric actuator. You have to add a sat. cond. temp. sensor and the module I think. I believe it's pretty expensive though.
    The Trane Parts Center quoted me @ $4000 for the parts to retrofit. The parts included KIT03939 and KIT03942. They say that everything I would need is in these kits.

    Add markup and labor and you are probably talking about a $10,000 retrofit.

    The chiller is a 1995 model, and is about worn out. If I was the customer I would not put that kind of money into it.

  7. #7
    Join Date
    Jul 2010
    Posts
    40
    Quote Originally Posted by SteveBelcher View Post
    Have you considered a vsd on the fan
    Can you reccomend one that does not require a motor change and works off of head pressure?

  8. #8
    Join Date
    Jun 2010
    Location
    U.A. (upper Alabama)
    Posts
    835
    Jack the dampers open and put a Penn press. switch on that fan.

  9. #9
    Join Date
    Jul 2010
    Posts
    40
    Quote Originally Posted by cperk View Post
    Jack the dampers open and put a Penn press. switch on that fan.
    That's how it is now. I get LPC trips when it's really cold. The "on/off" control of the fan seems like it's causing me problems. It seems like the TXV can't respond fast enough to the rapid changes in head pressure and my low pressure takes a nose dive when the fan cycles on.

    LWT setpoint is 40 degF.

  10. #10
    Join Date
    Jun 2010
    Location
    U.A. (upper Alabama)
    Posts
    835
    Quote Originally Posted by kwaichang View Post
    That's how it is now. I get LPC trips when it's really cold. The "on/off" control of the fan seems like it's causing me problems. It seems like the TXV can't respond fast enough to the rapid changes in head pressure and my low pressure takes a nose dive when the fan cycles on.

    LWT setpoint is 40 degF.
    What is your pressure settings on the Penn? Cut in and cut out.

  11. #11
    Join Date
    Dec 2009
    Location
    Southern US
    Posts
    504
    Since you said it has a TXV you might consider installing a Johnson Controls A350 and a 24v/0-10 actuator on the existing dampers. Strap the sensor that comes with the controller on the liquid line and set the controller to your desired liquid temp.

    I think the price would be reasonable and you have power for the controller readily availible. You would have to make a weathersheild for the actuator.
    I'm good at making things cold...You can ask my first two wives!

  12. #12
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
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    3,700
    Quote Originally Posted by kwaichang View Post
    Can you reccomend one that does not require a motor change and works off of head pressure?
    What kind of motors are on there now ? Figured that it was 3 phase. Call the manufacturer and find out.
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

  13. #13
    Join Date
    Jan 2008
    Location
    Dallas ,Texas
    Posts
    3,700
    Quote Originally Posted by chrishvacman View Post
    Why oh why not go with vfd
    WWJD I like that idea a lot!!!!!
    UA 100

    It takes three people to do anything around here. Two do the work, one explains to the crowd of people who showed up when they seen smoke and flames.

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