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  1. #1
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    CVHF oil pressure problem?

    I have a CVHF that the oil pump discharge pressure sensor reads around 9psi but at the pump im getting 18psi. Do you think it could be a sensor issue or a restriction in the oil line? Also Changed the oil filter and nothing changed. Oil level is good.


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  2. #2
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    Does it have an oil cooler?
    -----Stop, step back, relax and have another go at it.-----

  3. #3
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    Thread Starter
    Yes in the economizer.

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  4. #4
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    Prattville, Alabama
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    A quick and easy test to help determine sensor accuracy is to shut down the chiller and the oil pump, then compare the indicated pressure readings of all transducers at the control panel.

  5. #5
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    Thread Starter
    Quote Originally Posted by Nuclrchiller View Post
    A quick and easy test to help determine sensor accuracy is to shut down the chiller and the oil pump, then compare the indicated pressure readings of all transducers at the control panel.
    Well they all read the same, so should i pull the gas and check the oil line?

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  6. #6
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    Did you cut the filter open looking for silver?

  7. #7
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    Those numbers are fine. There will be a pressure drop across the oil cooler and yours seem to be within spec. If you're having oil pressure issues and not losing oil from the sump, you probably have a bad regulator.
    -----Stop, step back, relax and have another go at it.-----

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  9. #8
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    Thread Starter
    Quote Originally Posted by BennyD View Post
    Those numbers are fine. There will be a pressure drop across the oil cooler and yours seem to be within spec. If you're having oil pressure issues and not losing oil from the sump, you probably have a bad regulator.
    The sump was empty last week the chiller was idle for months 8+ . They wanted it running so i added 5 gallons of oil and got it running and all the oil came back after a day of running so I drained the 5 gallons back out. It ran fine for a few days.

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  10. #9
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    Quote Originally Posted by VanillaGorila80 View Post
    The sump was empty last week the chiller was idle for months 8+ . They wanted it running so i added 5 gallons of oil and got it running and all the oil came back after a day of running so I drained the 5 gallons back out. It ran fine for a few days.

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    If it's idle, they need to keep the oil heater on. I take it that it's a low sump under the condenser? That's a good sign that it all came back. I'm still pointing to the regulator.
    You're almost there to be eligible for pro membership. Apply and you can get more into the nitty-gritty.
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  11. #10
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    Aug 2009
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    Check out that oil sump heater. Not just that it's pulling some amps, but that it's pulling the correct amount of amps. That heater is actually a few smaller heaters inside a housing. They're wired in parallel, so a failure of one will still allow the others to operate, but it will not be sufficient. I don't recall what the full amperage is, but I'm sure somebody here will chime in.

  12. #11
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    Quote Originally Posted by Nuclrchiller View Post
    Check out that oil sump heater. Not just that it's pulling some amps, but that it's pulling the correct amount of amps. That heater is actually a few smaller heaters inside a housing. They're wired in parallel, so a failure of one will still allow the others to operate, but it will not be sufficient. I don't recall what the full amperage is, but I'm sure somebody here will chime in.
    6 amps give or take a few tenths.


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  13. #12
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    Quote Originally Posted by cperk View Post
    6 amps give or take a few tenths.


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    Thanks! I was going to pull a log but totally forgot!
    -----Stop, step back, relax and have another go at it.-----

  14. #13
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    Quote Originally Posted by cperk View Post
    6 amps give or take a few tenths.


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    Thanks, c! I trust y'all a whole lot more than I trust my memory, lol!


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