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  1. #1
    Join Date
    Apr 2017
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    York YS Style B Oil Heaters Burning up.

    This is my first post so please bare with me and I want to thank you for the opportunity to speak here.

    I have 2 - 200 Ton York YS Style B Chillers and 1 - 200 Ton York YS Style D in one building.

    These Chillers have had poor maintenance over their live spam and I've been set on the path to correct them.

    This post only pertains to YS Style B

    I have read over the PDF files pertaining to this issue that I am having and electrically there is no issue.

    The micro switches that turn on and off the heaters are a well style mounted in the bottom of the oil separator with heat transfer paste.

    These are 500w well style heaters.

    First time I inherited this issue. Year 2015
    The oil heaters were installed with heat transfer paste but still burn up due to over heating / poor heat transfer. I was only a HVAC mechanic that this point was only helping replace them.

    After first replacement. Year 2016
    Replaced heaters with new heat transfer paste made sure the wells were full of heat transfer paste. Was promoted to technician and now train mechanics on our campus

    After 2nd replacement. Year 2017
    Heat transfer paste was rock hard had to dig out heaters/ welded screw to the end of a Philips screwdriver for extraction. Installed new heaters wrapped with copper tin to fill gaps and filled with 100% copper anti seize.

    Lasted 2 months and failed again.

    Currently I've pulled both micro switches Installed in 1995 and removed both heaters.

    Is there a TSB bulletins or different method that I am missing? Thanks for your help and time.

    M# YSBBCAS1 - CGB
    S# SMDM - 806180


    Sent from my Pixel XL using Tapatalk

  2. #2
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
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    A few things...

    1. Are you using the OEM part and not some generic "pretty close" part?
    2. What are your voltages and amperages?
    3. Does your oil separator liquid level sensor work and is it wired in properly to turn off the oil heater?
    4. Stop using heat transfer paste. It isn't needed.
    5. Use a copper tube cleaning brush to make sure that the heater well is clean.
    6. Do you have the metal spacer insert for the heater and well? It is used to push the heater fully into the well and keep it there when you install the cap on the well.
    Don't step on my favorite part of the Constitution just to point out your favorite part.

    Political Correctness is forced on you because you have forgotten decency.

  3. Likes CHILLERSVCMAN liked this post
  4. #3
    Join Date
    Oct 2010
    Posts
    615
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    Lookup katz engine block heaters add them up till you match wattage plus some.They have integral stats , kind of hacky but works.The OEM ones don't last.

  5. #4
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
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    Interesting. I haven't had any issues with the heaters.
    Don't step on my favorite part of the Constitution just to point out your favorite part.

    Political Correctness is forced on you because you have forgotten decency.

  6. Likes CHILLERSVCMAN liked this post
  7. #5
    Join Date
    Dec 2014
    Location
    New Mexico
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    Quote Originally Posted by jayguy View Post
    Interesting. I haven't had any issues with the heaters.
    Ditto on both his answers


    Sent from my iPhone using Tapatalk

  8. Likes CHILLERSVCMAN liked this post
  9. #6
    Join Date
    Apr 2017
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    Thread Starter
    1. Are you using the OEM part and not some generic "pretty close" part?

    Yes they are OEM from Johnson controls. P# 025-29119-000

    2. What are your voltages and amperages?

    115 Volts can't test amps yet waiting for new parts.

    3. Does your oil separator liquid level sensor work and is it wired in properly to turn off the oil heater?

    The sensor is original so I plan on replacing it since it's over 20 years old and they were installed correctly.

    4. Stop using heat transfer paste. It isn't needed.

    Ok but the heaters feel loose.

    5. Use a copper tube cleaning brush to make sure that the heater well is clean.

    It was thoroughly clean each time.

    6. Do you have the metal spacer insert for the heater and well? It is used to push the heater fully into the well and keep it there when you install the cap on the well.

    All of the spacers are present and accounted for.

    Sent from my Pixel XL using Tapatalk

  10. #7
    Join Date
    Apr 2017
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    Thread Starter
    247 views and only a few responses?

    I did verify that the micro switches are good.

    Sent from my Pixel XL using Tapatalk

  11. #8
    Join Date
    Dec 2014
    Location
    New Mexico
    Posts
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    Pull the well and see if the wet side is not coated with carbon/ burnt oil. The wells may be insulated and the heaters are getting to hot.


    Sent from my iPhone using Tapatalk

  12. Likes Temp tech 77 liked this post
  13. #9
    Join Date
    Apr 2017
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    Thread Starter
    It won't let me add a picture to this forum. Am I doing something wrong it acts as if it will send but doesn't

    Sent from my Pixel XL using Tapatalk

  14. #10
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
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    Quote Originally Posted by IndustrialTech View Post
    247 views and only a few responses?...
    Some are lurkers. Some are learners. I often read without posting. No need in just adding commentary that may have already been said.
    Don't step on my favorite part of the Constitution just to point out your favorite part.

    Political Correctness is forced on you because you have forgotten decency.

  15. Likes CHILLERSVCMAN liked this post
  16. #11
    Join Date
    Jan 2012
    Location
    Dallas
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    Quote Originally Posted by IndustrialTech View Post
    247 views and only a few responses?

    I did verify that the micro switches are good.

    Sent from my Pixel XL using Tapatalk
    Rest assured with the exception of the one that said add up some heaters ( no offense to him just haven't seen much of his posts) the two posting are some the mot on point guys for the machines you described

  17. #12
    Join Date
    Apr 2017
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    Thread Starter
    One of the heaters and both micro switches

    Sent from my Pixel XL using Tapatalk

  18. #13
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
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    The micro switches (temperature sensors) can be wired up in reverse...make sure yours are wired correctly (I wouldn't think you would have a burned up heater if you did though).

    uou said that you were going to replace the oil level switch...sidntou check its operation and wiring before doing that?
    Don't step on my favorite part of the Constitution just to point out your favorite part.

    Political Correctness is forced on you because you have forgotten decency.

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