Compressor Failure
Liquid refrigerant migrates to the compressor crankcase during the off cycle.
Liquid Migration/Flooded Starts
Systems with a fixed orifice are charged by...
Superheat
To estimate the condenser split for standard efficiency equipment, ___________ to the outdoor temperature.
Add 30F
The color of a R410A refrigerant tank
Pink
Compressor head temperatures exceed 225F
Overheating
Externally equalized TXV/TEVs have how many ports?
3
Inner Diameter & Length
30-35F
The way your instructor cut his hair for 10 years
Liquid refrigerant reaches the compressor crankcase during operation
Liquid Floodback
To increase superheat, what direction would an adjustable stem need to be turned?
Fixed orifices and capillary tubes provide the system a...
Standard conditions for air conditioning are considered to be...
95F Outside, 75F Inside, 50% Humidity
The age of your instructor
34
Define compressor failure caused by slugging.
Liquid refrigerant and/or oil reach the compressor cylinder during operation
The two closing forces on a TXV/TEV are...
Spring Pressure and Evaporator Pressure
Systems with a fixed orifice will often have a ______ superheat on warmer days.
Starve the evaporator
The length of time your EPA Certification is valid
Forever
What are 3 examples of contamination that could cause compressor failure?
Non-condensables, oxidized flakes, moisture
Name 3 steps you should take before condemning a TXV/TEV
Ensure 100% subcooled liquid to the valve, check bulb placement, warm up the bulb
critically
Operating voltages must be within ___ of rated voltage.
10%
The final day of fall semester
December 9th, 2022