Refrigeration Cycle DOMRAC

is an advanced course that builds on the foundational

knowledge acquired in RAC Servicing.

This course delves deeper into the complexities of refrigeration and air conditioning systems, focusing on advanced diagnostic, troubleshooting, and repair techniques. It is designed to equip individuals with the necessary skills to install, service, maintain, troubleshoot, and repair domestic air-conditioning and refrigeration units.

• Basic Refrigeration Techniques Course
• Domestic Refrigeration and Air-Conditioning

• Refrigeration System Fundamentals
• Air Conditioning Basics Workshop

Size: Smaller and more compact

Accessibility: Items are within arm's reach

Best for: Smaller businesses, limited storage needs, and quick access to ingredients

• Walk-in Refrigeration

• Reach-in Refrigeration

• Room Refrigeration

• Air Conditioner

refers to the process of cooling a space, substance, or system to lower and maintain its temperature below the ambient temperature. It involves removing heat from a specific area and transferring it to a higher temperature area.

• Ventilation
• Refrigeration
• Insulation
• Heating

Medium-temperature walk-in refrigerators usually operate in a range of

• 20°F to 30°F (-6°C to -1°C)
• 50°F to 70°F (10°C to 21°C)
• 10°F to 20°F (-12°C to -6°C)
• 35°F to 37°F (1°C to 3°C)

reach-in refrigerators run at slightly higher temperatures, from

• 40°F to 50°F (4°C to 10°C)
• 25°F to 30°F (-4°C to -1°C)
• 32°F to 40°F (0°C to 4°C)
• 28°F to 34°F (-2°C to 1°C)

Walk-in freezers normally run at

• -20°F to -30°F
• -10°F to -20°F
• -5°F to 5°F
• 0°F to 10°F

reach-in freezers operate at about

• -10°F to -20°F
• 0°F to -10°F

• -5°F to 5°F
• -20°F to -30°F

AC (comfort cooling) temperature

• 80°F to 85°F (27°C to 29°C)
• 72°F to 78°F (22°C to 26°C)
• 60°F to 65°F (16°C to 18°C)
• 50°F to 55°F (10°C to 13°C)

high-temperature refrigeration temp:

• Above 0°C (32°F) up to around 10°C (50°F)
• Around 15°C (55°F)

• Between 20°C (68°F) and 30°C (86°F)
• Below -10°C (14°F)

medium-temperature refrigeration temp:

• 0°F to 10°F (-18°C to -12°C)
• 10°F to 20°F (-12°C to -6°C)
• 32°F to 40°F (0°C to 4°C)
• 20°F to 32°F (-6°C to 0°C)