Arkansas HVACR NewsMagazine March 2019

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system. The copper is then deposited in the high pressure/temperature environment of the compressor.

EVER HEAR OF COPPER PLATING INSIDE THE COMPRESSOR? Article Furnished by Bryan Orr,

Why does this happen?

The presence of any acids in the system can cause this to occur but the most likely causes are the combination of air and moisture reacting with the refrigerant oil (most prevalently POE) to create an environment in which the copper is dissolved internally and redeposited on the steel in the compressor. The result inside the compressor is reduced clearances and ultimately locking, overheating and even short circuits if the mechanical failure results in winding damage as is fairly common. So for a technician, what we can do is ensure we are properly evacuating the system and installing appropriate filter driers to reduce or eliminate the presence of air and moisture. — Bryan Article was originally printed in HVAC School For Techs by Techs. Bryan Orr offers a daily article on a plethora of issues that are important to our industry. You can find him at https://hvacrschool.com/ The link for this article is https://hvacrschool.com/ever-hear-of-copper- plating-inside-the- compressor/?utm_source=TechTips&utm_campaign=576c94e33e- RSS_EMAIL_CAMPAIGN&utm_medium=email&utm_term=0_6 08fe06f1d-576c94e33e-64230413

First, I want to thank Ulises Palacios for taking these photos. He is in the habit of cutting open the compressors he replaces to see why they failed (when possible). I think that’s pretty boss. So why would the compressor have copper plating on the inside? They certainly aren’t manufactured that way. The short answer is that acids inside the system can eat away at the copper and brass components in the