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Thread: r12 drop ins

  1. #1
    Join Date
    Nov 2003
    South Carolina
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    How do you guys determine what r12 alternative is being used when there is no lables on the system. Got a call from a chinamen restraunt..walk in freezer holding at 25 degrees. Condensing unit only has r12 listed. Condensing unit only has r12 on lable. Im assuming its probably 409a in this thing since its a lower temp evap or am i wrong. Pressures were 15 low side and 150 on high side. High side pressure seems a bit low to me. Sight glass is filled. I couldnt take a good look at the expansion valve because these guys had meat stacked on both sides of the coil. I told them to make sure that stuff was outta there in the morning and i would be back. Evap and condenser are clean. I have a suspicion ive got a expansion valve problem to deal with.

  2. #2
    Join Date
    Oct 2002
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    If it's not labelled your guessing. I see this alot went on one today R12 txv new compressor (less than 3 months) no damn tag pisses me off to no end. Recover it and start over. I have been using 416 for a 12 drop in with good success.

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