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Efficient Replacement of Vehicle Condensers: Charge Level Adjustments Explained

When replacing vehicle condensers, it’s crucial to understand that most vehicles use flat macro or micro tube designs that are challenging to flush after compressor failure. Replacement condensers may vary in efficiency compared to original units and might not match dimensions exactly. Adjusting the refrigerant charge level is essential for optimal performance. Begin with 80% of the original charge, adjusting in small increments while monitoring system performance. Conduct careful comparisons of condenser specifications and capacity to ensure proper installation and functionality.

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Efficient Replacement of Vehicle Condensers: Charge Level Adjustments Explained

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  1. Replacement Condensers Charge Level Adjustment May be Necessary

  2. Replacement Condensers • Most Vehicles Use Flat Macro or Micro Tube, Multi-pass, Condensers • Virtually Impossible to Flush After Compressor Failure • Will Need to be Replaced. Multiple Passages In Header Tanks Multiple Passages In Header Tanks Sub-Cooling Condenser

  3. Replacing the Condenser? • Condenser Technology Has Advanced • Replacement Condenser May be More Efficient (or Less) than the Original Unit • Replacement (Including OE) May not be an Exact Match for the Original Unit • Tube & Fin May be Replaced by Flat Tube Multi-pass Micro Tube Unit • Flat Tube Multi-pass Macro-Tube Might be Replaced with Thinner Micro-Tube Unit. • System Capacity May be Affected Flat Micro-Tube Flat Macro-Tube

  4. Condenser Tube Comparisons 16 x 1 mm, 15 Passages, .4 x .8 mm 16 x 1.75 mm, 16 Passages, .7 x 1 mm Actual Size! 18 x 2 mm, 10 Passages, 1.24 x 1.35 mm 22 x 2 mm, 10 Passages, 1.24 x 1.75 mm 22 x 2 mm, 13 Passages, 1 x 1 mm 22 x 1 mm, 18 Passages, .4 x .9 mm 26 x 2 mm, 10 Passages, 2.15 x 1.26 mm

  5. F150 - Condenser 1 Replacement Condenser 1 - Muti-pass Tube & Fin (Piccolo) Design – Older Technology Pp

  6. F150 - Condenser 2 Replacement Condenser 2 - Very Large Flat Tube, Single Pass, Serpentine Flow – Older Technology Pp

  7. F150 - Condenser 3 Replacement Condenser 3 - Flat Micro-Tube, Multi-pass Flow – New Technology – Very Efficient Pp

  8. Compare 3. Flat Micro-Tube, Multi-pass Flow 2. Very Large Flat Tube, Serpentine Flow 1. Tube & Fin “Piccolo” Pp

  9. Condenser Capacity “Piccolo’ Condenser Held 47 oz. • We Evacuated Each Condenser & Charged it with Liquid Refrigerant • They Held: • 1. Piccolo = 47 oz. (Matches O.E.) • 2. Serpentine = 43 oz. • 3. Micro-Tube = 26 oz. • We Need to Adjust Original Charge Amount Pp

  10. How to Handle? • Compare Original and Replacement Unit Dimensions • Basic Design – Flat (Micro or Macro) Tube, Serpentine or Multi-pass, Tube & Fin? • Compare # of Tubes • Size of Header Tanks • Connection Line Diameter • # of Cooling Fins/Inch • Condenser Thickness Pp

  11. Confirm Charge Level Perform Temperature Test to Validate Charge Level • Start at 80% of Original Charge • Add 1-2 oz. Increments • Monitor the Three “Dees” • Condenser Drop 20-50 Deg F • Ambient to Duct More that 30 Deg. Difference • Final Charge May be More or Less than Original • When Evaporator Inlet/Outlet Difference = 0 Deg. F Charge Level Correct Pp

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