The Fundamentals
A ton of refrigeration
What is 12,000 BTUs / hour?
Compressors cause this to force the flow of refrigerant.
What is a pressure differential?
Identified by their grey tanks and yellow shoulders
What is a recovery tank?
If there is an internal failure, it cannot be repaired.
What is Hermetic Compressor?
What is a Filter Drier?
Heat added to a vapor after a change of state...
What is superheat?
How refrigerant leaves the compressor
What is high-temperature, High-pressure vapor?
Does not contain any chlorine
What are HFCs (Hydrofluorocarbons)?
This uses an orbiting plate to create a pressure differential.
What is a scroll compressor?
These three pressures exert control over the TXV and flow of refrigerant.
What are the adjusting spring, evaporator pressure, and sensing bulb pressure?
Increases and decreases with the pressure...
What is Boiling Point?
Once through the metering device, the refrigerant is this mix of liquid and gas.
What is 80/20?
The governing agency for the construction and labeling of refrigerant cylinders.
What is The US DOT?
A piston-based compressor that can be open, semi-hermetic, or hermetic
What is a reciprocating compressor?
What is an accumulator?
14°C, but in America
What is 57.2°F?
This remains constant in the evaporator until all refrigerant has changed state.
What is temperature?
This refrigerant is NOT compatible with copper tubing.
What is Ammonia?
A type of compressor that compresses gas between a male rotor and a female rotor.
When evaporators operate at peak efficiency.
What is when all the surface area inside the tubes are exposed to flashing liquid?
Head needed to raise 26 lbs. of water 9°.
What is 234 BTUs?
This is when subcooling begins
What is when all refrigerant is condensed into a liquid?
A steep price for those who violate EPA regulations
What is $25,000 and/or jail time?
Usually operates with low pressure refrigerants
What is a centrifugal compressor
A type of coil developed to eliminate standard round copper or aluminum tubing.
What are microchannel coils?