Course Number: ACR-302
Course Description
Created to bring students up to speed in their skills and knowledge as quickly and safely as possible to perform basic servicing and troubleshooting of air conditioning and refrigeration associated with commercial buildings. The practical, common sense approach used in this course makes it perfect for novice technicians and experienced HVAC technicians alike. Anyone who needs to understand the basic operation, maintenance, and troubleshooting of air conditioning and refrigeration systems for commercial or residential locations will benefit. Since 80% of AC& R problems are electrically related, the section on electrical troubleshooting is unique to this course and not offered elsewhere.
Course formats:
MTI Training Center | On-Site
Additional Course Details
Each student will receive class books, work activity sheets, self-test progress evaluations, as well as questions from the instructor to make sure they understand the material presented. It is expected that an attendee will leave the class with the basic knowledge of the subject and possess new found skills to better equip them when they return to their job. A certificate suitable for framing will be issued to each attendee who successfully completes the course.
Hands-on activities:
50% hands-on activities
Electrical Troubleshooting AC&R
- Transformers
- Circuit protection
- Motor basics for single and three phase systems
- Capacitors, starters, thermostats
- Motor controls
Temperature and Pressure
- Measuring temperature and pressure
- The Gas Laws
Basic Refrigeration Cycle
- Refrigeration systems and components
- Evaporating and Condensing units
- Suction accumulator
- Filter driers
Refrigerants
- Halide refrigerants
- Refrigerant numbering system
- Refrigerant cylinder codes
- Selecting a refrigerant
Refrigerant Recover and Recycling
- The Clean Air Act
- Refrigerant leaks
- The three “Rs” – Recover, Recycle, Reclaim
- Record keeping
- Certification requirements
- Recovery procedures
- Recycle equipment
Zeotopic Blends
- Pure refrigerants, mixtures and blends
- Temperature-pressure card
- Retrofit procedures
Troubleshooting Refrigerant Problems
- Moisture, air and contaminants
- Leak detection
Working with Controls and Valves
- Check valves, solenoid valves, EPR valve
- Controlling head pressure
Flow Controls
- AEV, EPR, and TEV
- Capillary tube system
- Hot gas and other by-pass valves
Compressors
- Types of compressors
- Adding refrigerant oils to compressors
- Oil separators
- Determining compressor efficiency
Smart Decision Making
- Making a replacement vs repair decision
- Should you do the work or send it out?
- Life expectancy of critical parts
- Locating items for obsolete” equipment
Hands-On Exercises
- Installing and removing a manifold gauge set
- Measuring superheat and subcooling
- Recovering the refrigerant from a system
- Evacuating (pulling a vacuum)
- Charging a system by weight and by superheat
- Performing a “pump-down”
- Working with service valves and Schraeder cores
- Troubleshooting
Pictures of past groups:
All unmasked photos taken before COVID
Course Features
- Lectures 0
- Quizzes 0
- Duration - 2 days (8 hr/day)
- Skill level - All
- Language English
- Students 12
- Assessments Yes
