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So your not just supposed to put leather gloves on and push in the valve with a phillips screwdriver while holding your breath looking the other way????
 

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So your not just supposed to put leather gloves on and push in the valve with a phillips screwdriver while holding your breath looking the other way????
Yeah that's the atmospheric recovery method, but for some reason the EPA doesn't like it.
 

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Next-- they will fine you if the freon is released in an accident.
 

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I am using a Robin Air 134a machine I picked up used from a shop that was closing. If I remember correctly I think I paid $350 for it.
 

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I have a question for y'all, has to do with actual recovery devices....do they actually empty out the lines? Reason I'm asking, is if one did partake in the atmospheric method, is there any of the old freon left in the line? Just curious.
 

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R134a is an HFC refrigerant, or HydroFluoroCarbon. These refrigerants are not harmful to the Ozone as the CFC's (Chlorofluorocarbon) and HCFC's were, however they are still a greenhouse gas. Without getting into politics and other bs, this is the EPA stance.

I say this because that is the reason vehicles were changed to 134a. So that in an accident, the vented refrigerant to the atmosphere is OK. Also the volume of refrigerant is very small. Additionally, this is why 134a is for sale at Walmart and anyone can purchase it, without a certification.

(if your ever constipated, Google and read about the Montreal protocol. This why your home systems are being changed from an HCFC (R22) to a HFC (R410a).

This can be interpreted to mean that venting 134a with the "atmospheric recovery" method that you previously mentioned is not against the law. I could debate that it is not responsible (and that I would not make a practice of exposing myself to the vapor), but it is not illegal.

The cost of a recovery machine is based on the fact that you are supposed to be certified and licensed to buy one. There are people and ways to get one without, but the pricing is based on the intended limited market. The recovery machine allows a person to recover and capture the refrigerant into an approved vessel/tank.

Either by using the "atmospheric recovery" method or a recovery machine, you will achieve the same result of "no refrigerant gas" in your system. There will be residual oil left, but no refrigerant.

FYI: this oil and its type is one of the major limits to changing refrigerant types in a system.

The important part to the process is the ability to pull a vacuum in your system, before you recharge it with refrigerant (either new refrigerant or the refrigerant you recovered if you had a recovery machine). The vacuum is a vital process that removes contaminants and moisture from your system.

There are "shade-tree" shortcuts that will get you cold air, but short of a good vacuum prior to charging a leak free system, more problems are inevitable.

.02 of my profession. Goodluck.
 

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I might add that venting to the atmosphere will not remove all of the "Freon" instantly. It removes the Freon that is in a gaseous state, but not in a liquid state, like what may be pooled in the accumulator. It would eventually evaporate off, but one would have to leave the lines open for a while.
I have had some vehicles require multiple recoveries, and then a couple vacuum cycles, to "boil off" the remaining refrigerant.
 

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I might add that venting to the atmosphere will not remove all of the "Freon" instantly. It removes the Freon that is in a gaseous state, but not in a liquid state, like what may be pooled in the accumulator. It would eventually evaporate off, but one would have to leave the lines open for a while.
I have had some vehicles require multiple recoveries, and then a couple vacuum cycles, to "boil off" the remaining refrigerant.
Absolutely correct.
 

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What are you guys using to recover and recycle refrigerant? I was hoping to buy something cheaper and use it for a couple of years rather than spend $3k+ on a machine. I was hoping to get this Mastercool 69110 Portable A C Recovery Machine Brand New | eBay
I use Robinair Portable Refrigerant Recovery Machine. This one is perfect option to buy for refrigerant recovery. It is compact, lightweight and easy to carry. I am happy with it. It is effective and efficient coolant recovery machine.
 
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