So, you’ve got your chiller. You’re ready to recover. What’s the move? First, locate the liquid line—it’s usually the smaller, warmer pipe. That’s where the liquid refrigerant is twiddling its thumbs, waiting to be collected.
Connect your recovery machine to the liquid service valve. Use a high-pressure hose because liquid is thirsty and will try to push its way out like a kid at a candy store. Open the valve slowly—like you’re opening a soda can that’s been shaken, but with more career consequences.
Then, watch the sight glass. You’ll see a steady stream of clear liquid slide into your recovery cylinder. It’s oddly satisfying, like watching a lava lamp, but with physics and regulations. Once the liquid stops flowing, you know the chiller is now mostly gas—and that’s when you switch to vapor recovery.
The Sneaky Bonus: Oil Management
Here’s a secret that makes you look like a wizard to your boss. When you recover liquid first, you also grab most of the oil that’s hiding in the refrigerant. That oil is worth its weight in gold (or at least in not-getting-fired).
After recovery, you can drain that oil from your recovery cylinder and reuse it. Or, at the very least, you won’t have to explain why a compressor failed because it ran dry of lubrication. You become the hero who saves both the chiller and the budget.
Liquid Refrigerant Should Always Be Recovered First From Chillers | Gas
Plus, it makes the next step—weighing the recovered refrigerant—so much easier. No guessing, no “is this 20% oil?” drama. Just pure, honest, liquid-cold refrigerant numbers on a scale.
