HVAC - EPA Certification Practice Exam

What is the primary function of relief valves in an HVAC system?

1. To indicate pressure levels

2. To relieve excess pressure downstream from the pressure regulator

3. To regulate the flow of refrigerant

4. To connect components in series

The correct answer is: To relieve excess pressure downstream from the pressure regulator

The primary function of relief valves in an HVAC system is to relieve excess pressure downstream from the pressure regulator. These valves are critical safety devices that help prevent the buildup of pressure, which could lead to equipment failure or safety hazards. When the pressure reaches a predetermined level, the relief valve opens to allow excess fluid or gas to escape, ensuring that the system operates within safe limits. Understanding this function is essential, as it emphasizes the importance of maintaining system integrity and providing a measure of protection against potentially dangerous pressure levels. This capability is particularly vital in systems where fluctuations in pressure can occur due to changes in temperature or flow conditions. Proper functioning of relief valves helps safeguard the equipment and ensures efficient operation of the HVAC system.