Unit 8 Leak Detection System Evacuation And System Cleanup Flashcards
Refrigeration systems are designed for what two substances to circulate in them
refrigerant and oil
To pull a vacuum means to
Lower the pressure in the refrigerant system
non condensable gases
Are undesirable contaminants in the refrigeration system
A digital micron gauge
Is used to measure atmospheric pressure at sea level
a micron gauge
Is often used to measure a vacuum at less than 1 mmhg
There are ____________ microns in 1” Bg
10,000
a deep vacuum involves reducing the pressure to a refrigeration system to approximately
200 to 500 microns
in multiple and the evacuation means that
you pull a vacuum on a refrigeration system more than once allowing some dry nitrogen back into the system between each procedure
If a vacuum has pulled on a system and there is a leak, the vacuum gauge will
begin to rise
the best Leak Detection test is when the refrigeration system is
Not operating during standing
Liquid state must be ______ before it can be removed with a vacuum pump
Vaporized
1” Hg is equal to _________ microns
500 microns
At 15,500 microns, water boils at
64.47 f
Moisture + Acid+Oil =
Sludge
The _______ is both the greatest asset and the greatest liability of an electronic leak detector
sensitivity
