Copper/Brazing
This type of copper tubing has the thinnest wall and is rarely used in HVACR.
What is Type M?
This component is considered the "heart" of the system, moving refrigerant
What is the Compressor?
This is the target vacuum level measured in microns for a deep vacuum.
What is the Reversing Valve?
This type of certification allows you to work on small appliances.
What is Type I?
This component proves the pilot or igniter is lit before opening the gas valve.
What is a Flame Sensor (or Thermocouple)?
To prevent oxidation (scale) inside the pipe while brazing, you must flow this gas.
What is Nitrogen?
This device drops the pressure of the liquid refrigerant before it enters the evaporator.
What is the Metering Device (or TXV/Piston)?
A vacuum pump's performance is measured in this unit (volume per minute).
What is CFM (Cubic Feet per Minute)?
This is the term for removing refrigerant and storing it in an external container.
What is Recovery?
This safety switch opens if the heat exchanger gets too hot.
What is the Limit Switch?
This is the specific temperature range that distinguishes brazing from soldering.
What is 840°F (450c)?
This component, located after the evaporator, prevents liquid from hitting the compressor.
What is the Suction Accumulator?
This tool is used to ensure a vacuum gauge is reading accurately and the system is leak-free.
What is a Micron Gauge?
Under Section 608, you cannot legally top off a system with this many lbs of charge if it leaks over a certain %.
What is 50 pounds? (For commercial/IPE leak rate rules).
This gas is a byproduct of incomplete combustion and is odorless and deadly
What is Carbon Monoxide (CO)?
This measurement refers to the outside diameter of AC/R copper tubing.
What is Nominal Size (or OD)?
This heat exchanger rejects heat from the refrigerant to the outside air.
What is the Condenser?
This should be done to the vacuum pump oil if it becomes cloudy or dark.
What is Changing the oil?
This is the date after which it became illegal to vent any CFC, HCFC, or HFC.
What is July 1, 1992 (or the general venting prohibition)?
This is the typical manifold pressure (in inches of water column) for Natural Gas.
What is 3.5 inches w.c.?
This process involves heating copper and then cooling it to make it soft and workable again.
What is Annealing?
This valve reverses the flow of refrigerant in a heat pump system.
What is a Reversing valve
This law states that the total pressure of a mixture of gases is the sum of the partial pressures.
What is Dalton’s Law?
This category of refrigerant has the highest Ozone Depletion Potential (ODP).
What are CFCs (Chlorofluorocarbons)?
This is the percentage of "excess air" typically needed for proper combustion in a standard furnace.
What is 50%? (Standard atmospheric burner rule of thumb).