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  1. Join Date
    May 2010
    Posts
    18
    #1
    Newbie lang dito , Ask ko lang kung ano proper conversion from r12 to 134 ng 1996 sentra lec. Yung napagtanungan ko na A/C shop sabi flushing lang daw at palit ng oil, drier ok na daw sa 134. Di ba masira ang compressor, ano kaya effect sa lamig, hihina kaya o pareho lang ng lamig ng R12. By the way, original p lahat ng nkakabit sa aircon. advice naman sa A/C shop na mahusay at di tsambahan ang gawa. please kindly post all suggestions, thanks in advance.
    Last edited by amateur37; May 5th, 2010 at 09:49 AM. Reason: wrong spelling

  2. Join Date
    Jan 2006
    Posts
    2,105
    #2
    as far as from my research. dapat din yung o-ring palitan.

    have no idea to the effect to the compressor and effectiveness of the conversion.

    natawa lang ako, when my father asked the mechanics about the costs. 25k daw sa convertion. lol

  3. Join Date
    Aug 2008
    Posts
    65
    #3
    Quote Originally Posted by amateur37 View Post
    Newbie lang dito , Ask ko lang kung ano proper conversion from r12 to 134 ng 1996 sentra lec. Yung napagtanungan ko na A/C shop sabi flushing lang daw at palit ng oil, drier ok na daw sa 134. Di ba masira ang compressor, ano kaya effect sa lamig, hihina kaya o pareho lang ng lamig ng R12. By the way, original p lahat ng nkakabit sa aircon. advice naman sa A/C shop na mahusay at di tsambahan ang gawa. please kindly post all suggestions, thanks in advance.


    Kung original na R12 yung system, hindi mo na kailang pang inconvert sa R134a, dahil available pa naman dito sa atin sa Pinas ang R12, just unless na may ibang dahilan, e.g. sabi ng LTO kailangan R134a na para marenew mo yung registration ng sasakyan, IMHO other than that hindi mo na kailangan magconvert.

    May ilan kasing requirements na kailangan para sa conversion. Bukod doon sa flushing at oil change, as rion suggested, dapat lahat ng o-ring palitan, kailangan palitan din yung service port ng pang R134a, in some extreme cases baka kailangan mo ring palitan ang iyong condenser to achieve the best performance.

  4. Join Date
    Nov 2007
    Posts
    164
    #4
    Quote Originally Posted by amateur37 View Post
    Newbie lang dito , Ask ko lang kung ano proper conversion from r12 to 134 ng 1996 sentra lec. Yung napagtanungan ko na A/C shop sabi flushing lang daw at palit ng oil, drier ok na daw sa 134. Di ba masira ang compressor, ano kaya effect sa lamig, hihina kaya o pareho lang ng lamig ng R12. By the way, original p lahat ng nkakabit sa aircon. advice naman sa A/C shop na mahusay at di tsambahan ang gawa. please kindly post all suggestions, thanks in advance.
    sir nakapagkonver na ho tayo ng ganyan..kaya nagpalit ako ng compressor(kaya ko lang pinalitan dahil maingay na,parang merong kumakalansing),drier at expansion valve..sa condencer ay hindi..ang comprsor na para lang sa r12 ay design sa para lang dito..mas mataas kasi ang ipapasok na freon dito tulad ng r134a..in the long runsisibakin din nya ito o wawasakin..ang mangyayari ay back to square one ulet ang trabaho..salmat

  5. Join Date
    Jan 2006
    Posts
    2,105
    #5
    how about the freon/oil ratio. same lang po ba? since 134a uses less freon if I am not mistaken.

  6. Join Date
    Nov 2007
    Posts
    164
    #6
    Quote Originally Posted by rion View Post
    how about the freon/oil ratio. same lang po ba? since 134a uses less freon if I am not mistaken.
    hindi marami hindi sobra..ang technician na nakakaalm..

  7. Join Date
    Mar 2006
    Posts
    607
    #7
    Quote Originally Posted by rion View Post
    how about the freon/oil ratio. same lang po ba? since 134a uses less freon if I am not mistaken.
    sa r12 to r134A conversion ,maglagay ka ng 70% r134a .
    sa lubrication naman use ESTER synthetic oil , kung ano ang recommended oil capacity yun ang ilagay mo.

  8. Join Date
    Feb 2009
    Posts
    5,130
    #8
    Quote Originally Posted by bambino View Post
    sa r12 to r134A conversion ,maglagay ka ng 70% r134a .
    sa lubrication naman use ESTER synthetic oil , kung ano ang recommended oil capacity yun ang ilagay mo.

    this is something else. all the textbooks, manuals and conversion instructions prescribe poly alkyl glycol lubricant (PAG), similar to tf39 aircraft engine oil and not polyol ester (POE)

  9. Join Date
    Mar 2006
    Posts
    607
    #9
    ^^ all cars manufactured w/ r134a systems use PAG oil ,we use PAG oil manufacturing Chrysler vehicles here in Canada and I once stationed at AC department working w/ ac systems.

    i use ester to convert r12 to r134a systems its because of the compatibility of the old capella oil and ester oil .

    we don't have to flush the whole system as once believed .

    i have been using ester oil strictly for conversion only.

    if working with original r134a systems i always use PAG oil.

  10. Join Date
    Apr 2008
    Posts
    35
    #10
    charge with refrigerant R-134a that's it, pareho lang ng standing pressure r12/r134a. cost 1000 pesos....

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What's the proper conversion from r12 to 134 of 1996 sentra LEC aircon