The Fundamentals
Circle of Cool
The Cool Juice
Under Pressure
Coiled Again!
100
A ton of refrigeration
What is 12,000 BTUs / hour?
100
Compressors cause this to force the flow of refrigerant.
What is a pressure differential?
100
Identified by their grey tanks and yellow shoulders
What is a recovery tank?
100
If there is an internal failure, it cannot be repaired.
What is Hermetic Compressor?
100
In cooling, the Heat Absorber
What is an evaporator coil?
200
Heat added to a vapor after a change of state...
What is superheat?
200
How refrigerant leaves the compressor
What is high-temperature, High-pressure vapor?
200
Will tell you how much liquid you have in your outdoor coil...
What is subcool?
200
Creates an intentional restriction in the refrigerant circuit
What is a Metering Device? (will accept TXV)
200
A possible reason your system is tripping on high limit
What is a plugged condenser coil?
300
Increases and decreases with the pressure...
What is Saturation Temperature? (would also accept temperature)
300
Once through the metering device, the refrigerant is this mix of liquid and gas.
What is 80/20?
300
The most accurate way to charge refrigerant
What is charging by weight?
300
Responsible for adjusting your metering device based on temperature of your lineset.
What is a sensing bulb?
300
The first thing to check when you have ice over your evaporator coil
What is airflow / static pressure? (will accept filter)
400
The recommended CFM setting for the following:
What is 1200 CFM?
400
This remains constant in the evaporator until all refrigerant has changed state.
What is temperature?
400
The measurements needed to determine target superheat
What are indoor wetbulb and condenser dry bulb?
400
The compressor winding that should read the largest resistance
What is Start to Run?
400
Used to make the coils change jobs
What is a reversing valve?
500
14°C, but in America
What is 57.2°F?
500
This is when subcooling begins
What is when all refrigerant is condensed into a liquid?
500
This refrigerant is NOT compatible with copper tubing.
What is Ammonia?
500
Indicated by power going to the compressor, but no change in refrigerant pressures
What is broken scroll plate / crank shaft?
500
A type of coil developed to eliminate standard round copper or aluminum tubing.
What are microchannel coils?