CO2 240 CO2 Evaporators
Enrollment options
CO2 240 — R744 Evaporators and Defrost
Audience
Industrial refrigeration technicians and engineers responsible for selecting, operating, or supporting evaporators in R744 systems.
Value
CO2 240 explains how evaporators actually behave in R744 systems and why certain designs are chosen for specific applications. Rather than focusing on catalog data alone, the course connects heat transfer fundamentals to real‑world operation, load variation, and control behavior. This understanding helps technicians avoid misapplication, recognize normal operating conditions, and diagnose evaporator‑related performance issues.
What’s Included
The course covers evaporator sizing fundamentals, overfeed and DX operation, air unit selection, cold storage applications, evaporator controls, and R744 defrost logic. Emphasis is placed on system interaction and operational intent rather than installation or service procedures.
Course Sections
- Introduction – Role of evaporators in R744 system performance
- Sizing Evaporators – Heat transfer fundamentals and TD selection
- Overfeed Units – Recirculated evaporator operation
- DX Units – Direct expansion evaporators and superheat control
- Ceiling Hung Units – Common air unit applications
- Penthouse Evaporators – Large warehouse solutions
- Cold Storage Applications – Placement and airflow strategies
- Controlling Evaporators – Temperature and fan control concepts
- R744 Defrost in Detail – Hot gas defrost sequencing and logic
Outcome
After completing CO2 240, participants will understand how R744 evaporators are selected, applied, controlled, and defrosted, and will be prepared to support reliable evaporator operation in industrial CO₂ systems.