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Thread: one shot....

  1. #1
    Join Date
    Feb 2004
    Location
    southern illinois
    Posts
    5,534
    has anybody used this from icor international,...says that it is replacement for 22..

  2. #2
    Join Date
    Nov 2003
    Posts
    501
    One Shot is a replacement for 502/404/408, etc. and LOW TEMP 22 applications. ICOR makes a 22 replacement called Nu-22 for other applications.

    Anyway, I haven't tried it yet, but I'm really happy with their 12/134a replacement, Hot Shot.

    You'd probably have better luck asking this in the refer section though.

  3. #3
    Join Date
    Apr 2004
    Posts
    7,680
    So you have it....

    Nu-22 on a 5 ton system tested at ASHRAE "A" conditions has 83% of the capacity of R-22. This reduces the unit to a 4.1 ton system.

    In a 10 ton chiller, (100 degree condesner with 4 degree evaporator secondary coolant temperature) you now have 78% capacity or a 7.8 ton Chiller.

    Mineral Oil is miscable with Nu-22 technically but it is far from a good match. You should use POE oil with Nu-22. Mineral oil and any HFC have potential oil return issues.

    Because it is a blended refrigerant with significant glide, you have a seperation issue in the event of a leak.

    And as far as I can tell Nu-22 (r417A) is not appoved for use by ANY compressor mfg as a retrofit refrigerant.

    You are far better off looking at R407C, R404A, R507 as acceptable retrofits but.... Why?

  4. #4
    Join Date
    Feb 2004
    Location
    southern illinois
    Posts
    5,534
    just curious doc,....thanx for reply.

  5. #5
    Join Date
    May 2003
    Location
    Dixie
    Posts
    1,344
    does one shot require oil change or txv adjustment?

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