Push Pull Recovery - Short 119
HVAC School - For Techs, By Techs
Bryan Orr
4.9 • 1K Ratings
🗓️ 8 June 2021
⏱️ 7 minutes
🧾️ Download transcript
Summary
In this short podcast episode, Bryan discusses push-pull recovery, how it works, and what we need to know about it.
Push-pull recovery is a somewhat counterintuitive method of recovering liquid rapidly. We simply do that by pulling refrigerant out of the system and pushing it into the tank. However, when we pack refrigerant into a tank, the tank pressure and temperature increase. So, it can be more difficult to get refrigerant into the tank as the job goes on.
When we recover liquid refrigerant on large systems (20+ pounds of charge), you connect a line from the liquid line or receiver and attach it to one side of the tank. Then, you pull from the system the other side of the tank should lead into the recovery machine. Attaching to the recovery machine helps depressurize the tank.
When pulling out of the tank, you'll want to make sure the refrigerant is a vapor. The recovery machine should be pulling only vapor refrigerant out of the tank. While you're depressurizing your tank, you will be pressurizing your system to push the liquid refrigerant out of the system and into the recovery tank. (Short hoses with a large diameter are usually best for quick recovery.)
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Transcript
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| 0:00.0 | Hey, this is Brian with the HVAC School Podcast, and today we're going to be talking about |
| 0:09.2 | push-pool recovery, how it works, where and why you may want to use it, and so on and so forth. |
| 0:16.2 | But before we do that, got to thank our excellent sponsors and partners. |
| 0:20.6 | Refrigeration Technologies at Refriger tech.com. |
| 0:25.0 | Field Piece and Field Piece. |
| 0:27.0 | Make so many great tools that it's hard to mention them all, but they do have a new large pipe |
| 0:31.6 | clamp that you're definitely going to like. |
| 0:33.0 | It goes up to four inches and it works great if you are in the more industrial sides of our |
| 0:39.1 | industry. |
| 0:40.1 | Very, very accurate, great form factor. We tested it out at Kailos and we really love it. |
| 0:45.6 | Find out more by going to fieldpiece.com and our good friends over at speed clean |
| 0:50.8 | and speed clean.com carrier and Clean.com. |
| 0:53.8 | Carrier and carrier.com |
| 0:55.8 | Zoa at TZOA. |
| 0:59.1 | Zoa. com. |
| 0:59.7 | All right, so pushpool is really a method for rapidly recovering liquid and one of the |
| 1:07.8 | advantages of pushpool is that you recover liquid without your tank heating up as quickly. And so how you do it is actually pretty simple, but it's counterintuitive. |
| 1:18.0 | We do this by pulling refrigerant out of the system and pushing it into the tank. That's the typical way. So you're pulling it out of the system and pushing it into the tank. |
| 1:23.1 | That's the typical way. |
| 1:24.0 | So you're pulling it out of the system |
| 1:25.3 | and pushing it into the tank. |
| 1:26.3 | So that would be pull push rather than push pull. |
... |
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