HVAC Basics
What does HVAC stand for
What tool is used to measure air velocity
What could be the cause if an HVAC system is not blowing cold air?
: Low refrigerant levels)
What is one way to improve HVAC energy efficiency
Regular maintenance and filter replacement)
What organization sets standards for HVAC systems?
ASHRAE - American Society of Heating, Refrigerating and Air-Conditioning Engineers)
What is the primary function of an evaporator coil?
To absorb heat from the air in the home)
What is a manifold gauge set used for
To measure the pressure of refrigerants)
What might cause an HVAC system to trip the circuit breaker
What does EER stand for
Energy Efficiency Ratio)
What is the EPA’s refrigerant management program called?
Section 608 Certification)
What refrigerant is commonly used in residential HVAC systems
R-410A)
What does a vacuum pump do in an HVAC system
Removes air and moisture from the system)
What should be checked if an HVAC system is making loud noises
Loose components or debris in the unit)
How does a programmable thermostat save energy
By adjusting the temperature based on a set schedule)
What does OSHA stand for?
Health Administration)
: What does a heat pump do
Transfers heat from outside to inside during winter and vice versa in summer)
Name the device used to detect refrigerant leaks.
Electronic leak detector
What does a frozen evaporator coil indicate?
Poor airflow or low refrigerant
What is the purpose of an energy recovery ventilator (ERV)
To exchange stale indoor air with fresh outdoor air while retaining energy)
What is the maximum allowable refrigerant leak rate for commercial HVAC systems?
20% of the charge per year for comfort cooling)
What is SEER rating?
Seasonal Energy Efficiency Ratio
What is the purpose of a TXV (Thermostatic Expansion Valve)
Regulates the amount of refrigerant flow into the evaporator)
What could cause uneven cooling in a building?
Ductwork issues or thermostat placement)
What is a high-efficiency furnace's AFUE rating
Typically 90% or higher
can you release refrigerant into atmosphere, if so how much
the minumis