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Old 10-06-2021, 14:22   #1
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Type of Refrigerant

I have an older Alder Barbour refrigerator on my boat and I'm trying to identify what type of refrigerant is used in it. Attached is a picture of the refrigerator compressor and the fill valve. The refrigerator is still cooling, but the evaporator plate isn't frosting completely. It still cools the space sufficiently (e.g. freezes stuff at the bottom of the refrigerator).
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Old 10-06-2021, 14:45   #2
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Re: Type of Refrigerant

Most likely R-134a, but you really need to find out for sure. Should be label someplace.
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Old 10-06-2021, 15:08   #3
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Re: Type of Refrigerant

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Originally Posted by JimsCAL View Post
Most likely R-134a, but you really need to find out for sure. Should be label someplace.

I found this label on the bottom. It looks like it takes R12-3.5oz. Not sure if it is possible to get this type of refrigerant anymore.
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Old 10-06-2021, 15:24   #4
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Re: Type of Refrigerant

You have a Danfoss BD 2 or BD2.5 Freon R12 unit unless there there is a Blue sticker on the other side stating 134a refrigerant. Around 1995 there were a Few BD 3 compressor conversion to 134a that also changed oil from mineral to ester oil comparable with 134a refrigerant.
My advice do not use 134a refrigerant as there is plenty of R12 around and you only need around 3 ounces. Your problen then is this a one year loss of refrigerant or a one month loss.
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Old 10-06-2021, 15:24   #5
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Re: Type of Refrigerant

That is really an old unit, as R12 has been phased out for a long time. You can get R12, but it is expensive. Luckily you don't need much.

Note it's not possible to read your pic, so taking your word for what the label says.
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