The Fundamentals
Circle of Cool
The Cool Juice
Under Pressure
Coiled Again!
100
A ton of refrigeration
What is 12,000 BTUs / hour?
100
This causes a pressure differential in the system, which allows refrigerant to flow.
What is a compressor?
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
This component is responsible for a pressure drop so the evaporator coil can more easily boil off refrigerant
What is a metering device?
200
Will tell you how much liquid you have in your outdoor coil...
What is subcool?
200
A capillary tube is an example of this type of metering device
What is a fixed metering device?
200
The most likely reason your unit is tripping on a high pressure limit code.
What is a plugged condenser coil? (low outdoor airflow)
300
Increases and decreases with the pressure...
What is Saturation Temperature? (would also accept temperature)
300
How refrigerant leaves a TXV or Piston
What is a low-pressure, low-temperature liquid-vapor mix
300
The most accurate way to charge refrigerant
What is charging by weight?
300
Reads your suction line temp and adjusts the opening in your TXV.
What is a sensing bulb?
300
The first thing to check when you have ice over your evaporator coil
What is filter / static pressure / airflow?
400
The recommended CFM setting for the following:
What is 1200 CFM?
400
The line where you are most likely to find high-pressure, high-temperature vapor
What is the discharge line?
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 remains constant in the evaporator until all refrigerant has changed state.
What is temperature?
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?