How to install refrigerant lines


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Old 12-12-10, 07:09 PM
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How to install refrigerant lines

I am installing a split A/C system. In connecting the refrigerant lines should I use teflon tape, pipe dope or nothing on the threads of the connectors. Thanks
 
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Old 12-12-10, 08:01 PM
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I haven't seen a system with mechanical joints in years how old is this system? What brand name?
 
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Old 12-12-10, 11:06 PM
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I assume he has one of the Chinese mini-splits that have flared connections.

Joey, if this is true then be forewarned that if that system uses anything but R-134a for a refrigerant it is unlawful for an unlicensed person to work with the refrigerant lines. Even if this doesn't bother you not having a vacuum pump to remove the air in those lines will likely lead to early failure or even an immediate lack of operation of your unit.
 
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Old 12-13-10, 04:06 AM
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It's a sanyo split system. Yes it has flare fittings. I am looking to connect the inside unit with the line set. The outside unit will be attached and flushed by a pro
 
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Old 12-15-10, 04:32 AM
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Use NOTHING on the flared connections; no Teflon tape, no Teflon paste, no RectorSeal, no Leak-Lok, nothing at all. If you had some of the special compressor oil for a R-410 compressor you could use a drop on the flare itself and on the threads IF it was a new container of oil and not contaminated by the air or anything else.

Do NOT leave the lines open any longer than necessary to make the connections.
 
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Old 12-15-10, 06:16 AM
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Thanks

Finishing the lineset install this weekend and the HVAC installer is coming to vacuum, pressure test and finish install during the week. Thanks for all of the help
 
 

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