HVAC CORE EPA

Card Set Information

Author:
blackcat
ID:
213458
Filename:
HVAC CORE EPA
Updated:
2013-04-14 16:36:00
Tags:
OILS
Folders:

Description:
HVAC flashcards
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The flashcards below were created by user blackcat on FreezingBlue Flashcards. What would you like to do?


  1. What is the prefered oil to be used with HFC-134a ?
    The lubricant most used with HFC-134a are the  polyolesters or "ester" based.The ester based oils are hygroscopic,meaning they readily absorb moisture
  2. Can ester based oils be mixed with other oils?
    NO, no oils, lubricants or refrigerants should be mixed
  3. What does "hygroscopic" mean ?
    Hygroscopic means it is an ester based oil that readily absorbs moisture
  4. What lubricant type is recomended for use with a ternary blend?
    Polyolsters or ester based oils are recomended with a ternary blend another lubricant type , the alkylbenzene type is coming into use for some ternary blends containing HCFC's

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