11-01-14, 09:34 AM | #1 |
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Newbie Question on copper tubing
Looking at a modern mini-split heat pump, it is obvious that different type of copper tubing is used. Soft (bendable) tubing for the line set and hard tubing (pipe) for various "plumbing" inside the interior and exterior units.
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11-01-14, 10:32 AM | #2 |
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It's all about the pressure ratings of the pipe, the requirements of which are application specific. Also, you might have to clean "regular" pipe before using it, while ACR pipe comes precleaned.
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11-01-14, 11:26 AM | #3 | |
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Quote:
The "Copper Tube Handbook" says Air-Conditioning and Refrigeration Systems — Copper is the preferred material for use with most refrigerants. Use Types L, ACR or as specified.ACR is available on both annealed (soft) and drawn (hard) tempers. Annealed is available in coils or straight length s. Drawn is only available in straight lengths. Drawn has a much higher working pressure than annealed. The short answer is, use ACR, annealed or drawn as the application requires. The bummer for DIYers, is that this is probably not available at your favorite home center. |
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11-01-14, 12:16 PM | #4 |
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You can get by with Type L or flexible copper (given enough pressure rating) for most applications. Just use an air duster to remove any dust inside.
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