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21 thoughts on “How to Add Freon or Refrigerant to a Walk In Cooler or Freezer with Sight Glass

  1. bblazeff1 says:

    I like to front seat king valve and introduce liquid into the liquid line, after I've pumped the system down. It will minimize liquid pushing oil out of the compressor and slugging. Try it out. It charges alot faster as well

  2. OcRefrigeration , Hvac & Electrical Video's. says:

    Good Video. A Little tip for ya. Tighten the yELLOW hose onto the Refrigerant jug WHILE u are bleeding air out NOT after you purged a little air out. if u do like u did in the video it is possible to get air back into the yellow refrigerant hose when u stop bleeding air out. bUT, REMEMBER YOU STILL HAVE A SMALL AIR BUBBLE BETWEEN THE TANK AND HOSE NOW SO TO GET ALL AIR OUT U MUST CRACK TANK OPEN AT SAME TIME AS BLEEDING AIR OUT OF HOSE to Eliminate ANY AIR BUBBLES. This is Why i Use a 4 Valve Manifold Purging everything back through the manifold and out the vacuum Hole at the manifold elimanting all air from hoses through manifold. I'll Put up a video soon and show u What i Mean. Good Video besides that.

  3. The working man says:

    Charging a system with no high side reading is foolish. Becauseeeee you could have a restriction in the system and you could over charge a system and burn up a compressor and get a call back.

  4. 001tracker001 says:

    R22 is not an azeotropic (mixture) refrigerant. And charging as a vapor is perfectly fine and allows u to charge quickly. When a compressor kicks out on low pressure, I usually kill power and dump liquid to quickly add charge (allowing a few minutes before returning power) until the pressure switch is out of the picture. But that’s just me.

  5. John Golding says:

    I’ve charged liquid mostly for decades. Always for blended. Never slugged a compressor but was always careful to moderate fLow.
    The valves sounded rather loud on his. 🥴🤔

  6. K G says:

    Never forget to purge your hoses before opening the king valves. If you are checking a vacuum, vacuum your hoses before opening the king valves.

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