Advanced Evacuation w/ Jim Bergmann

<p>Jim Bergmann returns to the HVAC School podcast to cover some advanced topics in evacuation, including rig setups and triple evacuation.</p> <p>To increase the speed of evacuation, you need two large-diameter vacuum hoses to overcome the limitations of pressure. Core removal is also critical, as Schrader cores are a significant restriction. It's also unwise to use a manifold for evacuation; a manifold will double your hose length, provide a restriction, and serve as a leak point.</p> <p>The vacuum pump is full of opportunities to expand your advanced evacuation knowledge. The pump oil needs to stay...