Course Number: HCD-302
Course Description
The course explains controlling air distribution for the comfort of people and is designed for any worker involved in air distribution systems. Takes students from the basics of HVAC electrical controls through air distribution and troubleshooting. Attendees are taught how to modulate their electrical controls and use fundamental air distribution principles for achieving consistent HVAC comfort and efficiency in buildings, plants and facilities. Reduction of air velocity and related noise are investigated. HVAC system problems can be divided into three major categories – Air Distribution, Electrical or Mechanical. The part that causes most service headaches is the electrical portion and most of that can be traced back to control problems. A lot of the training concentrates on overcoming the most common service problems encountered in HVAC.
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:
25% hands-on activities
Thermodynamics
- Objectives
- Principles and fundamentals of heat transfer
- Pressure and vacuum
- Pressure/temperature/volume relationships
- Gas laws
- Cycle construction
Vapor-Compression Refrigeration Cycle
- Heat-transfer process
- Follow the heat
- Typical operating conditions
Refrigerants and Oils
- Refrigerant composition
- R-410A
- Refrigerant classifications
- Refrigerant safety
- Refrigerant cylinders
- Environmental refrigerant regulations
Refrigerant Equipement Components
- Evaporators
- Compressors
- Condensers
- Metering devices
- Refrigeration-system accessories
Heat Load in Refrigeration System
- Survey
- Calculating the total product load
- Miscellaneous heat load
Psychrometerics
- Psychrometrics
- Comfort
- EPA 420-K-02-003
- Moisture control in the mold control
- Humidity
- Preservation
- Dew point
- CRM Requirements
- Air Condition System Design
Basic Electricity
- Basic electricity & Ohm’s Law
- Meters & tools for taking electrical measurements
- Electrical circuits: series & parallel
Control Circuits
- Schematics
- Ladder Diagrams
- Developing Wiring Diagrams
Controls
- Overloads
- Relays
- Contactors
- Control Transformer
- Starting Relay
- Defrost Timer
- Thermostat
- High Pressure Control
- Low Pressure Control
- Oil Pressure Control
Troubleshooting
- General Troubleshooting
- Commercial Air Conditioning
- Heat Pump Control
- Pump Down Cycle
Determining and Improving Air Flow
- 400 cfm per ton
- How many square feet per ton
- Air mixture at the cooling coil
Exhaust Air
- Positive pressure
- Negative pressure
Make-up Air
- Positive pressure
- Negative pressure
- Conditioning the “make up” air
Troubleshooting the Air Distribution System
- Temperature difference across coil
- Balance in the system
- Short cycling
- Duct sizing
- Noise
- How to use a Ductulator
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
