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  1. #1
    Join Date
    Jun 2006
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    midwest
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    OROAB 5-210 R407C on Liebert Remote Condenser.

    OAT 8*. head pressure control making a loud vibrating noise. Is this a sign of internal damage to the valve or diaphram or is it common at this low of ambients

  2. #2
    Join Date
    Jun 2009
    Location
    DFW, TX
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    I have no experience with that particular valve, but two of my supervisors have told me of instances where a ridiculously loud noise was found to be coming from a headmaster.

  3. #3
    Join Date
    Oct 2011
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    Chicagoland Area
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    I would say yes. Have seen it once on a Hoshizaki IM. Replaced valve, noise is gone.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  4. #4
    Join Date
    Nov 2009
    Location
    Richmond, working under tarps
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    i've heard noise come from them on start up or pump down, what is the discharge and liquid pressures at?

  5. #5
    Join Date
    Jun 2006
    Location
    midwest
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    Just shut down ckt 1, to dang cold out with windchill at -17* f. Will return at end of week to investigate. Customer happy and occupants in office below condenser happy with noise gone .

  6. #6
    Join Date
    Jan 2011
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    Quote Originally Posted by gwoner View Post
    Just shut down ckt 1, to dang cold out with windchill at -17* f. Will return at end of week to investigate. Customer happy and occupants in office below condenser happy with noise gone .
    Did you ever find a solution for this? We have the same problem going on. Replaced one valve without any success getting rid of the noise, and the valve has now failed (it seems as we got low suction pressure alarms the last two nights).

  7. #7
    Join Date
    Feb 2015
    Location
    STL
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    Name:  image.jpg
Views: 52
Size:  116.9 KBDid you happen to look inside the old valve? I found the unthinkable in one of these valves. A rubber plug. Instead of a steady screeching noise from hot gas being passed through the valve it was like a pulsating screeching noise. Good luck!

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