Federal training, leadership training and management training for government employees and the general public.

Rooftop HVAC Operation and Maintenance


This course covers the operation, maintenance, service and troubleshooting of roof top units (RTUs). 

The proper day-to-day operation, lay-up and start-up procedures are presented for RTUs, with special operation and maintenance considerations for condensers, evaporators, metering devices, economizers, controls and other specialized devices. 

System malfunction analysis procedures and techniques are presented. 

Safety and energy conservation are covered throughout the program. 

Methods of troubleshooting, unit electrical power, air distribution, and control systems using electromechanical and solid state control are emphasized.



Employees who complete this course and are expected to work on air conditioning equipment, must be certified by the EPA.

The NCED is licensed to administer the EPA test and certify air conditioning technicians.

Learning Outcome

Upon completion of this course the student will be able to:

  • Identify individual components of unitary rooftop heating/cooling systems.
  • Identify individual components of economizers and related systems.
  • Identify types of metering devices used in unitary rooftop systems.
  • Demonstrate knowledge of the controls used in unitary rooftop systems.
  • Demonstrate knowledge of the operation and advantages of the scroll compressor.
  • List the accessories used to facilitate normal operation of unitary rooftop systems in low ambient operating conditions.
  • Interpret electrical schematics used with unitary rooftop systems, both with and without economizers.
  • Troubleshoot component and electrical faults in unitary rooftop systems.
  • Perform all maintenance functions in a safe manner.
  • Perform all maintenance functions in compliance with EPA and OSHA regulations.

Target Audience

  • This course is intended for mechanics, technicians, and maintenance supervisors who are assigned or scheduled to be assigned, responsibility for the operation and maintenance of HVAC equipment.

Course Completion Requirements

Successful completion of this course requires 64-hours of attendance, completion of all guided labs and achieving a 70% or greater score on the combined average of 2 lab tests and 2 written exams.


The following courses are recommended prerequisites: Industrial Electrical Service (Course #5568705), Introduction to Refrigeration and Air Conditioning (Course #5560303), and Environmental Control I (Course #5568601).