The lines should be brazed with Phosco (phosphorus copper braze rod) or better. http://www.made-in-china.com/china-products/productviewIeqxHjvMAQWh/Harris-Phosphorus-Copper-Brazing-Alloys.html I've seen soft solder connections on compressors blow oil up the wall three stories when a 300 psig line pulls the solder loose. www.heatpro.us energy businessmen's knowledge Yes, you really have to find out the MAKE and MODEL to get good answers. There IS more than one machine made.
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