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Location Requirements for Oxygen Concentrator Units

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  • Friday, February 09, 2018 8:06 AM
    Message # 5729357
    Al Moon (Administrator)

    NFPA 99 for the 2018 Edition


    I believe for this type system the answer is, indoors only in a room


    Via the following logic path.


    Step #1

    Wherever the name of a specific gas service occurs, the provision shall apply only to that gas.


    Step #2

    Review Section ( it clearly names a specific gas service ) 

 * Oxygen Central Supply Systems Using Concentrator(s). Any oxygen central supply system that includes one or more oxygen concentrator supply system(s) shall comply with through Location. Oxygen central supply systems using concentrator(s) shall be located per and as follows:

    (1) Indoors in a dedicated mechanical equipment area, ventilated, and with any required utilities (e.g., electricity, drains, lighting).

    (2)* In a room ventilated per

    (3) For air cooled equipment, in a room designed to maintain the ambient temperature range as recommended by the manufacturer.

    (4) Rooms containing oxygen central supply systems using

    concentrators(s) that do not have the concentrator purge gas vented to the outside shall be equipped with oxygen depletion monitors with alarm indicators at the entrance(s) that will indicate ambient oxygen levels in the room below 19.5 percent.

    (5)* Individual elements of the oxygen central supply system using concentrator(s) shall be permitted to be located in separate rooms or enclosures as necessary to meet through


    Step #3 

    In all five bullet points, the words indoors or room is listed.


    Yes, their is some small mention of oxygen concentrators in

    But ever time it does, the book has you referring back to ( see )


    To this end.


    I believe for this type system the answer is, indoors only in a room.   

    Last modified: Wednesday, October 10, 2018 9:31 AM | Anonymous
  • Saturday, February 10, 2018 11:26 AM
    Reply # 5730718 on 5729357

     It needs to be in an enclosure out of the weather but I’m not sure what your true point to this is? 

  • Sunday, February 11, 2018 9:56 AM
    Reply # 5731702 on 5729357
    Al Moon (Administrator)

    The point here is this is new type system for the life support gas Oxygen.

    Many new code requirements, in this case 5 items on its location.

    Its all about safety.


    Wow their are about 8 required alarm signals, to be at both master alarm panels.

    Can we all names them ?

  • Sunday, February 11, 2018 2:05 PM
    Reply # 5731972 on 5729357

      Oxygen Generator malfunction,  reserve cylinders in use,  reserve cylinders low,  hospital oxygen percent low,   Oxygen line pressure low,  oxygen line pressure high.  (Generator room oxygen percentage  unsafe.) depending on the system.  

     Six basic alarms. 

     That could replace:

     Liquid oxygen supply low,  liquid oxygen reserve in use, Liquid oxygen reserve low,  Liquid oxygen reserve head pressure low, Oxygen line pressure high,  oxygen line pressure low,

     Six basic alarms.  

    Last modified: Sunday, February 11, 2018 2:22 PM | Don Holden
  • Monday, February 12, 2018 8:17 AM
    Reply # 5732975 on 5729357
    Al Moon (Administrator)

    Plus: part (10)

    a oxygen concentration monitor on both the patient side and on the source side of the source valve shall be activate local alarm and master alarm panels.


    That 1 more.


    We may also need Oxygen Concentration Offline & Oxygen Concentration iIternal Pressure Low. 


    See (14) their are boat load of alarms 


  • Monday, February 12, 2018 10:17 AM
    Reply # 5733222 on 5729357

     I listed them already with oxygen generator malfunction and hospital oxygen percentage low.  

  • Monday, February 12, 2018 4:52 PM
    Reply # 5733881 on 5729357
    Al Moon (Administrator)

    code requires two oxygen monitors- so two monitors and two alarms signals 


    see: (14) part a & g

    & (10)


    Table A5.1.9.2

    is also helpful.

    (I do not see the listings of malfunction) 

    Last modified: Monday, February 12, 2018 4:55 PM | Al Moon (Administrator)
  • Tuesday, February 13, 2018 11:11 AM
    Reply # 5734920 on 5729357

     When the generator cannot produce 90% oxygen it will turn itself off and go into malfunction 

  • Tuesday, February 13, 2018 7:31 PM
    Reply # 5735903 on 5729357
    Al Moon (Administrator)

    All great test questions, for the up coming 2018 MGPHO CMGV Test. 

    Available at the annual MGPHO meeting In Atlanta GA Oct 3,4,5 - 2018

  • Wednesday, February 14, 2018 7:25 AM
    Reply # 5736558 on 5729357

    You're right Al - great test questions.


    Let me add a bit more - 


    On the low oxygen concentration it's a bit more complex.  Each train has to have a concentration monitor.  If oxygen falls to <91%, the train in question must be automatically closed off from the system to prevent contamination downstream.  The Supply Source Isolating Valve is BOTH manual and Automatic for this reason. That is unique to NFPA - it was not part of the ISO document.


    Your reading of the alarms is also correct - there are a LOT of them.  Because each train is equipped with a manual/automatic valve, the valve itself must be provided with an signal ( (5)).  If you close the valve manually, it will give an alarm e.g. "Oxygen Concentrator Supply Source Isolated" signal.  This is a Master alarm signal only - unusually it is not Local and Master, which is because Locally you will be able to physically look at the valve.  If oxygen falls below 91%, the alarm e.g. "Low Oxygen Concentration, Oxygen Concentrator Supply Source X" will be activated at Local and Master panels AND because the Supply Source valve will close automatically, the "Oxygen Concentrator Supply Source Isolated" alarm at the Master will ALSO be activated.    


    I've not updated my "Oxygen On Site" booklet yet, but I'll try to make the alarms clear when I do.  It's not a classic sequence like we are used to.

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