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  1. #1
    Join Date
    Jun 2006
    Location
    midwest
    Posts
    126

    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
    Posts
    677
    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
    Location
    Chicagoland Area
    Posts
    4,830
    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
    Posts
    528
    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
    Posts
    126
    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 .

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