system evacuation Flashcards
Proper micron gauge installation and use will decrease system reliability and longevity. True or false
False
Dehydrating means?
Removing moisture from the system
While performing an evacuation, the _____ side line is connected to the vapor line.
Low
A triple vacuum is a method we use in smaller systems to help increase evacuation speed. The dry nitrogen helps to?
Pull a very deep vacuum
Degassing in HVAC is removing air and non-condensable gases from the system. True or false .
True
A micron is a unit that we use to measure the cleanliness of the refrigerant. True or false.
False
Why do we use vacuum trees and vacuum hoses?
To ensure we remove less oil from the system.
What does system evacuation prevent?
Component damage/improper system operation due to the presence of moisture and air/non-condensables
A successful evacuation is indicated when the system is depressurized to ____ microns or less.
500
Approved methods for charging a system are:
Charge according to the manufacturer’s directions
The purpose of a decay test is to
Check for leaks and moisture in the system
In the presence of oxygen, moisture can?
Accelerate oxidation (rust)
The purpose of products like Nylog is to prevent leaks from fittings while evacuating a system. True or false
True
Connect your micron gauge as close to the vacuum pump and as far from the unit as possible. True or false
False
A gas ballast is made to ?
Blow condensate to the outlet, removing them from the oil
