Refrigerant and heat transfer oil

I didn't find standard which concerning about these two types of oil. But I recommend you to set the test and limit as well as follow:

Refrigeration Compressor Oil.

  1. Kinematic Viscosity@40 degree C (cSt, Max +10% and Min -40%)
  2. TAN (mg KOH/g, max +0.3 from starting point)
  3. Fe, Cu, Cr, Al, Pi (Max 50 ppm)
  4. Oxidation FTIR (Max 0.3 Abs)
  5. Water Content (Max 0.05%)
  6. Do oil replacement when reach 5 years or 2 Turn Around cycles.

 

Heat Transfer Oil

  1. Kinematic Viscosity@40 degree C (cSt, Max +10% and Min -20%)
  2. TAN (mg KOH/g, max +0.3 from starting point)
  3. Fe, Cu, Cr, Al, Pi (Max 50 ppm)
  4. Pentane Insoluble (Max 0.3%)
  5. Flash Point COC (Min,  180 degree C)
  6. Water Content (Max 0.05%)
  7. For NEW OIL, you may add: Conradson Carbon Residue (CCR) to check the tendency of the oil to be converted into carbon. (Max 1%)
  8. Do oil replacement when reach 10 years.

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