Cover art for podcast HVAC School - For Techs, By Techs

HVAC School - For Techs, By Techs

466 EpisodesProduced by Bryan OrrWebsite

HVAC School is the ever growing online source for real training topics for technicians in the Air-conditioning, Heating and Ventilation Fields. In the podcast, we will share recorded training, tech ride alongs, share challenging diagnostic scenarios. All to help make the industry, your company, and … read more

10:44

Triple Evacuation - Short 121

In today’s short podcast, Bryan explores triple evacuation. Many people believe that we don’t like triple evac, but that’s simply NOT true. We’re here to set the record straight.

 

If the manufacturer tells you to follow triple evacuation processes, then it’s a good idea to do a triple evacuation. We won’t argue with that. However, our argument is that triple evacuation can be more time-consuming than it’s worth when it’s NOT necessary.

 

Deep vacuum technically counts as a vacuum pulled below 500 microns (in residential, that target is usually 200-300 microns). Most modern micron gauges and tools make it easy to achieve a deep vacuum. In a triple evacuation, you pull the vacuum three times (instead of once). Between pulling vacuums, you break with nitrogen before pulling the vacuum back down.

 

Triple evacuation originated in a time when micron gauges and vacuum pumps were less reliable. We did not take deep vacuum very seriously, especially since mineral oil (MO) typically did not break down inside the system. (Modern oils like polyolester/POE break down rather easily, so pulling a deep vacuum is much more vital nowadays.)

 

Instead of merely breaking with nitrogen, Bryan recommends flowing it. It’s best to flow the nitrogen with force to move the oil around more effectively. In turn, your vacuum will pull down more quickly and efficiently.

 

So, triple evacuation isn’t bad, but it can be time-consuming. Just be sure to follow all best practices if you perform a triple evacuation.

 

Join us as we cover:

 

  • Deep vacuum targets
  • Micron targets for triple evacuation
  • Triple evacuation and breaking with nitrogen
  • Flowing nitrogen during a triple evacuation
  • POE vs. mineral oil
  • Old manufacturer literature about deep vacuum
  • Microns


If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE.

Educational emoji reaction

Educational

Interesting emoji reaction

Interesting

Funny emoji reaction

Funny

Agree emoji reaction

Agree

Love emoji reaction

Love

Wow emoji reaction

Wow

Are you the creator of this podcast?

Verify your account

and pick the featured episodes for your show.

Listen to HVAC School - For Techs, By Techs

RadioPublic

A free podcast app for iPhone and Android

  • User-created playlists and collections
  • Download episodes while on WiFi to listen without using mobile data
  • Stream podcast episodes without waiting for a download
  • Queue episodes to create a personal continuous playlist
RadioPublic on iOS and Android
Or by RSS
RSS feed
https://hvacschool.libsyn.com/radiopublic

Connect with listeners

Podcasters use the RadioPublic listener relationship platform to build lasting connections with fans

Yes, let's begin connecting
Browser window

Find new listeners

  • A dedicated website for your podcast
  • Web embed players designed to convert visitors to listeners in the RadioPublic apps for iPhone and Android
Clicking mouse cursor

Understand your audience

  • Capture listener activity with affinity scores
  • Measure your promotional campaigns and integrate with Google and Facebook analytics
Graph of increasing value

Engage your fanbase

  • Deliver timely Calls To Action, including email acquistion for your mailing list
  • Share exactly the right moment in an episode via text, email, and social media
Icon of cellphone with money

Make money

  • Tip and transfer funds directly to podcastsers
  • Earn money for qualified plays in the RadioPublic apps with Paid Listens