Air Conditioning and Refrigeration Overview (ACR01)

Health and Safety
• Particular dangers of refrigerants, toxicity, accumulation of gases, frostbite/freezer burn • Discharging refrigerants,
requirements of Environmental Protection Act • Bacteriological hazards and the elimination of conditions, favourable to
the growth of organisms, Legionella and the danger to personnel • Personal Protective Equipment.
Specialist Equipment
• Use of charging and evacuating equipment • Refrigerant leak test equipment and usage. Manual, chemical, gas and
electronic methods • Tooling requirements.
Materials
• Properties and applications of commonly used refrigerants • Properties and types of lubricants used with refrigerants
• Insulating materials and application methods • Refrigeration theory • Latent and sensible heat, vapour point
• Vapour compression cycle • Heat transfer factors (related to condensers, evaporators and secondary heat exchangers)
and simple calculations • Comfort conditions.
Air Conditioning Systems
• Air handling units, filtration, changeover methods • Secondary refrigerant systems • Heat pumps • Fans and ducting
• Settings • Sizing of rooms.
Basic Compression Refrigeration Systems
• Basic compression refrigeration system components • Compressors • Condensers • Expansion devices
• Evaporators • Liquid line components • Suction line components • Defrost systems • Commissioning and testing
• Basic checks • Power supplies, oil levels, safety cut outs, defrost, controls (where applicable) • Air condition systems.
Check damper and grill settings • Pressure testing as per makers instructions. • Evacuating methods using high vacuum
pumps • Charging systems. Pre-charge purging methods. (After circuit has been opened).