Sample interview questions: Can you explain your knowledge of different types of air vents used in hydronic systems and their functions?
Sample answer:
Types of Air Vents in Hydronic Systems
- Manual air vent: A manual air vent is a simple device that is installed on the highest point of a hydronic system. It is a small, brass valve that can be opened and closed manually to release air from the system. Manual air vents are inexpensive and easy to install, but they require regular maintenance to ensure proper operation.
- Automatic air vent: An automatic air vent is a device that automatically releases air from a hydronic system. It is typically installed on the highest point of a system, and it uses a float to sense the presence of air. When air is present, the float rises and opens a valve to release the air. Automatic air vents are more expensive than manual air vents, but they are more convenient and require less maintenance.
- Micro-bubble air eliminator: A micro-bubble air eliminator is a device that removes micro-bubbles from a hydronic system. Micro-bubbles are small bubbles that can cause noise and corrosion in a system. A micro-bubble air eliminator uses a centrifugal force to separate the micro-bubbles from the water. The micro-bubbles are then removed from the system through a drain valve.
Functions of Air Vents in Hydronic Systems
Air vents play an important role in hydronic systems by:
- Removing air from the system: Air can enter a hydronic system through leaks in t… Read full answer
Source: https://hireabo.com/job/12_0_14/Hydronic%20Technician