Refrigerant recovery without a machine

Рет қаралды 4,376

event3horizon

24 күн бұрын

Can you recover refrigerant out of a car or truck with just a tank and no recovery machine? Let's find out!

Пікірлер: 15

@sc5015 21 күн бұрын

Dry ice can be bought in quite a few palaces, it can be a bit of money. Something to try in the future is add rock salt to your water bath. Its the way ice cream was made long before reliable refrigeration. Get a larger vessel, add more ice and a big scoop of the cheapest rock salt used for deicing roads and driveways. The rock salt will effectively make the ice melt faster and get the water bath to lower than the temperature of the ice alone. Interesting concept, thanks for sharing. Look forward to follow ups if you try this again.

@brcidd 22 күн бұрын

We used dry ice in our Factory- try putting a hairdryer to the accumulator that will help.. Dry ice made it pull a vacuum on the gages

@Bizija123 22 күн бұрын

Interesting. Thanks for the input!

@joeysantillo8977 21 күн бұрын

Stupid question. If you are replacing the compressor anyway, can you run the system to pump the remainder of the refrigerant out the high side into the tank.? You might have to jump the compressor clutch to keep it on for a few seconds until the system empties.

@Bizija123 21 күн бұрын

@@joeysantillo8977It sounds feasible. The high side will have higher pressure and push freon toward the tank. As you mentioned, the compressor will need to be jumped to bypass the cutoff switch. It will not be "good" for the compressor of course, but even if you're replacing it, you don't want to risk having it seize up and contaminate the system, which in itself opens a whole other set of problems.

@kevinsok3011 20 күн бұрын

@Bizija123 Honestly the chances of messing up the compressor in that scenario are pretty low. If the vehicle is at an idle, and you run the compressor until the gauges quit lowering, there will still be residual oil in the compressor keeping it lubricated. Same concept when draining trans fluid without a drain plug. Unhook a cooler line, idle the engine until fluid quits coming out, then immediately shut it off. Doesn't hurt the pump or starve it long enough to do any damage.

@charlesturner3265 19 күн бұрын

134a isnt that pricey, also pull from the liquid that way you get liquid volume not just vapor pressure. I also used to charge small refrigeration units through the liquid side before powering them up, then finish by vapor. If you are having problems with the system your refrigerant may be contaminated. Any oil pulled would be added back if you reused the refrigerant. hope this helps

@jumboegg5845 21 күн бұрын

Any reason why you didn't recover liquid refrigerant from the high side?

@Bizija123 20 күн бұрын

@@jumboegg5845 I was thinking about trying that however I read somewhere that it pulls out too much oil from the system.

@rusty81588 19 күн бұрын

Did you try doing it a second time to see if pulls the other half out? Maybe the tank just ran out of vacuum?

@Bizija123 19 күн бұрын

@@rusty81588 I tried from both low side and high side however once the tank equalizes in pressure with the car's system, it no longer pulled in any refrigerant. It appears that dry ice is needed to REALLY get the tank cold and lower the pressure enough to pull the freon in more. Someone also suggested having a second vacuumed tank to pull the rest in, but that is extra expense.