Economizer
An Economizer is a device used in heating, ventilation, and air conditioning (HVAC) systems that helps buildings save energy and money. It works by using outside air for cooling when the temperature is right, instead of running the air conditioning system at full power. Think of it like opening your windows on a cool day rather than running the AC. This equipment is important in commercial buildings and is often required by building codes. When looking at resumes, you might see this term mentioned because working with economizers is a key skill for HVAC technicians and building maintenance professionals.
Examples in Resumes
Installed and calibrated Economizer systems in commercial buildings
Performed maintenance and troubleshooting on Economizers and Air-Side Economizers
Managed energy efficiency projects including Free-Cooling Economizer installations
Typical job title: "HVAC Technicians"
Also try searching for:
Where to Find HVAC Technicians
Professional Organizations
Online Communities
Job Boards
Example Interview Questions
Senior Level Questions
Q: How would you diagnose and fix an economizer that's not switching properly between outside air and return air?
Expected Answer: A senior technician should explain checking sensors, damper operations, control settings, and describe a systematic troubleshooting approach. They should mention the importance of checking building automation system settings and verifying proper integration with the main HVAC system.
Q: How do you determine if an economizer is saving energy as intended?
Expected Answer: They should discuss measuring and comparing energy usage data, checking temperature differentials, verifying proper damper operation times, and understanding local climate conditions that affect economizer operation.
Mid Level Questions
Q: What are the main components of an economizer system?
Expected Answer: Should identify dampers, actuators, temperature sensors, humidity sensors, and controls. Should explain how these components work together to manage air flow and temperature.
Q: What maintenance does an economizer system need?
Expected Answer: Should describe regular cleaning, lubrication of moving parts, sensor calibration, and control system checks. Should mention inspection schedules and common wear points.
Junior Level Questions
Q: What is the basic purpose of an economizer?
Expected Answer: Should explain that economizers save energy by using outside air for cooling when conditions are right, reducing the need for mechanical cooling.
Q: What safety checks do you perform before working on an economizer?
Expected Answer: Should mention power disconnection, checking for moving parts, proper lockout/tagout procedures, and ensuring safe access to the equipment.
Experience Level Indicators
Junior (0-2 years)
- Basic understanding of economizer operation
- Simple maintenance tasks
- Safety procedures
- Basic tool usage
Mid (2-5 years)
- Economizer installation and repair
- Troubleshooting common issues
- Reading system diagrams
- Regular maintenance procedures
Senior (5+ years)
- Complex system integration
- Energy efficiency optimization
- Advanced diagnostics
- Project management
Red Flags to Watch For
- No knowledge of basic HVAC principles
- Unfamiliarity with building automation systems
- Lack of proper certifications
- No experience with energy efficiency calculations
Related Terms
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