HVAC CORE EPA

  1. What is the preffered instrument for detecting small leaks ?
    Electronic leak detectors,One of the advantages of electronic leak detectors over other leak detection methods is higher sensitivity
  2. What is an inert gas typically used in leak detection ?
    To locate a leak on an empty system under the new EPA regulations,the system should be pressurized with an inert gas(DRY NITROGEN)
  3. What is typically indicated by a dehydrated system failing to hold a vacum?
    • To pull a vacum the system is first pulled down to approximately 29in.Hg and valved off.Any leak within the evacuated appliance will cause
    • the system pressure to rise eventually reaching 0 psig.
Author
blackcat
ID
212704
Card Set
HVAC CORE EPA
Description
Hvac FlashCards
Updated