Refrigerant Cycle
This component increases the pressure and temperature of the refrigerant vapor
What is the Compressor?
Where the heat from a heat pump is gathered
Outdoor air
This color gauge hose is typically connected to the low-pressure side (suction line) of an HVAC system.
What is Blue
If voltage is read across a fuse what does this indicate
The fuse is blown
This is the physical location where you measure suction line temperature and pressure to calculate superheat.
What is the suction line (or evaporator outlet)?
This Component creates a pressure drop, acting as the boundary between the high and low sides
What is the Metering Device?
This crucial component in a heat pump switches the direction of refrigerant flow, allowing it to switch between heating and cooling.
What is the Reversing valve
You charge by Superheat when you have what component in the system?
Piston or fixed metering device
The Component that energizes electric heaters
Sequencer or contactor
What 2 things can cause a compressor to go into thermal overload
Incorrect refrigerant charge or poor air movement across the condenser.
A abnormally low suction pressure and abnormally high high side pressure is an indication of __________
Restriction
This component shuts the compressor off in the event of over-heating
What is the Thermal overload protector
What units does a compound pressure gauge for the low side of the system measure in?
Psig and inches of mercury
This is the most common cause of restricted airflow over an indoor coil, which can cause a heat pump to freeze up.
What is a dirty air filter
If you discover R-410-A was added to a R-22 system, what should you do?
Recover mixture in a separate tank
The state of the refrigerant when it enters the compressor
What is Low pressure vapor?
When is the reversing valve energized on a Goodman unit
Cooling mode
How should refrigerant blends be charged
As a liquid
If you have a bad transformer, what most likely caused it?
Low voltage short
If the calculated superheat is higher than the target, this is the most likely charge condition.
What is undercharged?
This component absorbs heat and causes the refrigerant to change state from a liquid to a vapor.
What is the Evaporator?
During the heating cycle, the heat pump may periodically switch to this mode to melt ice on the outdoor coil.
What is the Defrost Cycle
A system that is low on refrigerant charge will typically exhibit this on the evaporator coil.
What is Icing/Freezing?
Anytime you open the sealed refrigerant system you should replace the ___________
Filter Dryer
This type of heat is added to a vapor after it has completely evaporated in the evaporator.
What is Superheat?