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Old 06-01-16, 09:57 AM   #1
DonT
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Default R22 to R290

how do I convert a R22 1-1/2 ton AC compressor from R22 to R290?
is R290 the same as the LP I have in my 500gal LP tank for the furnace?
isn't there a oil or something you have to add to make it work?
any and all info will be a big help

thanks Don

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Old 06-01-16, 05:09 PM   #2
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There are multiple threads open about this same topic, just do a quick search for R290 and be prepared to do some serious reading. ALL your questions will be answered.
I'm not trying to push you off either, there is SO much more info in those threads than I or anyone on here could possible type up.
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Old 06-01-16, 05:59 PM   #3
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Memphis speaks the truth.. It's all over this site.. Just cruise through the heat pump section..
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Old 06-01-16, 06:10 PM   #4
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Make and model? Do you plan on doing any other mods?
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Old 06-03-16, 11:34 PM   #5
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Short version:
how do I convert a R22 1-1/2 ton AC compressor from R22 to R290?
you don't have to do anything, can even mix with R22 left in system

is R290 the same as the LP I have in my 500gal LP tank for the furnace
close enough, you big tank may or may not have high levels of water that would freeze up an orifice or txv, so run thru filter dryer when charging. Most 1# cans of bbq propane are pretty dry, but no guarantee.
BTW, the filter/dryer will also REMOVE ALL of the mercaptan, so the propane will be ODORLESS. Don't rely on odor for safety.

isn't there a oil or something you have to add to make it work?
nope, same mineral oil as used for R22.

any and all info will be a big help
read the hundreds of other posts. Best to NOT use R290 for HP that is in a basement, propane is heavier than air.

Depending on the area of the country you live in, your big tank 'propane' may have appreciable amounts of butane, heptane, etc. Your supplier can tell you the composition.
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Old 06-17-16, 06:23 PM   #6
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In all the previous threads, did not see any discussion of alternatives to a filter/dryer to remove H2O from bbq propane.

I wonder if just removing the valve from an old propane tank, dumping a pound of dessicant, an then re-filling with propane would remove the water if one let it sit for a few weeks ?

Anyone tried that?
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Old 06-18-16, 11:45 AM   #7
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mejunkhound, I know some places have more problems with moisture in the mix, but I haven't have a single problem. I run mine through 2 larger driers that I keep vacuumed down while in storage.

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