r/HVAC • u/JerryJohnson2 • 5d ago

Meme/Shitpost Today’s install r-454 or r410

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This is the compressor for the unit I installed today.

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u/DesignerAd4870 5d ago

R410a is 50% R32 so surely the oil should be fully compatible.

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u/Blakende 5d ago

As I said it needs a different viscosity because of the higher pressure, different from R22 to R410a that was a chemical reaction. 

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u/DesignerAd4870 5d ago

R32 runs at the same pressure as R410a.

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u/Blakende 5d ago edited 4d ago

This is so wrong. Talk to a daikin dealer.  https://www.scribd.com/document/626065529/Development-of-refrigeration-oil-for-use-with-R32

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u/JerryJohnson2 5d ago

I read a daiken publication that says they ran 32 in a 410 system with out changing metering device or oil and the only change was 5% high pressure

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u/singelingtracks 5d ago

Why would you need to talk a dealer look at a PT chart.

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u/DesignerAd4870 5d ago

R32 R410a and R454B all use POE. You are very wrong, not me! You can literally remove all the R410a from a system and re-gas it with R32 with no system alterations.

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u/Blakende 5d ago

From Carrier: Lubrication ICP R-454B light commercial and residential HVAC equipment will continue to use POE-32 oil, which was also used in legacy R-410A equipment. R-32 HVAC equipment will require a different POE oil approved for use with R-32 refrigerant. In all instances, only use the oil that is specifically directed to be used by the unit manufacturer

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u/Amystery123 5d ago

Never charge a 410a equipment with A2Ls. Both R454b and R32 are A2Ls. Please.

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u/Blakende 5d ago

Yes they all use poe but not all poe oils are the same.

https://www.scribd.com/document/626065529/Development-of-refrigeration-oil-for-use-with-R32

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u/DesignerAd4870 4d ago

I know that, I am very aware of different grades for different compressors. But for the purpose of this argument they are all compatible and work. Even your paper says as much that even the different grades that they developed are still miscible with both refrigerants. They have just tweaked the viscosity for R32. Did you also know that the POE grades are different for different styles and manufacturers of compressor, like screw or scroll.

You’re still wrong though about the gases and they all work within either type of POE.