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Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems.
Critical Work Function 7 Identify, install, maintain, and repair refrigeration systems.			Occupational Skills, Knowledge and Conditions
Key Activities		Performance Criteria	Occupational Skills and Knowledge	Conditions
Those duties or task clusters that are necessary to perform each critical work function.		Specific demonstrable performance and standards that indicate when the key activity has been performed successfully.	Those skills and knowledge that are specific to the occupation, such as technical processes or procedures common across the occupation that are critical to the related key activity.	Tools, resources and equipment necessary to carry out key activities and their related performance criteria.

KA7.1	Identify, install, maintain, and repair mechanical refrigeration systems.	Number Criteria 7.1.1  Identify mechanical refrigeration  systems; for  example, walk-in coolers and  freezers, reach-in cases, multiple evaporator  systems, and packaged  refrigeration  systems.  7.1.2  Install mechanical refrigeration  systems; for example, walk-in coolers and  freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration  systems.  7.1.3  Maintain  mechanical refrigeration  systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration systems.  7.1.4  Repair mechanical refrigeration systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged  refrigeration systems.  7.1.5  Post-service performance audit of HVACR equipment indicates mechanical refrigeration system operating at or above manufacturer's  design specifications, benchmarks, and baselines.	Knowledge and understanding of refrigeration systems. Knowledge and understanding of charging, wiring, and recovery per EPA guidelines. Knowledge and application of various measuring instruments and testing devices. Ability to identify refrigerants appropriate to meet required temperature and per manufacturer’s specifications. Knowledge and understanding of alternative refrigerants and lubricants. Understanding of proper procedures for oxy/acetylene brazing rig to braze in refrigerant lines.	Appropriate hand tools  VOM multimeter  Ammeter  Refrigerant manifold gauges  Digital thermometer  Electronic leak detector  Oxy/acetylene brazing rig  2-stage vacuum pump  Micron gauge
KA7.2	Identify, install, maintain, and repair electric and hot gas defrost systems in refrigeration systems.	Number Criteria 7.2.1  Identify electric and hot-gas defrost systems in  refrigeration systems. 7.2.2  Install electric and  hot-gas defrost systems in  refrigeration systems.  7.2.3  Maintain electric and hot gas defrost systems in  refrigeration systems.  7.2.4  Determine proper defrost timing schedules with customer. 7.2.5  Repair electric and hot-gas defrost systems in  refrigeration systems. 7.2.6 Post-service performance audit  of HVACR equipment indicates electric  and hot gas defrost systems operation  at or above manufacturer’s design specifications, benchmarks, and baselines.	Knowledge and understanding of refrigeration defrost systems. Ability to initiate defrost to determine if system is in proper operation.   Knowledge and application of meter measurement. Knowledge and interpretation of pressure/temperature relationships. Use pressure/temperature relationships to time properly defrost cycles.	Appropriate hand tools  VOM multimeter  Ammeter  Digital thermometer   Manifold gauges
KA7.3	Install, maintain, and repair flake and cube ice makers.	Number Criteria 7.3.1  Install flake and cube ice makers.  7.3.2  Maintain flake and cube ice makers.  7.3.3  Repair flake and cube ice makers. 7.3.4  Post-service performance audit of HVACR equipment indicates flake and cube ice maker operation at or above manufacturer's design specifications, benchmarks, and baselines.	Knowledge and understanding of ice makers. Knowledge and application of various measuring instruments and testing devices. Understanding of the proper procedures for oxy/acetylene brazing rig.	Appropriate hand tools  VOM multimeter  Ammeter  Gauge manifold and hoses  2-stage vacuum pump  Electronic leak detector  Micron gauge  Oxy/acetylene brazing rig   Digital thermometer
KA7.4	Install, maintain, and repair water coolers.	Number Criteria 7.4.1  Install water coolers.  7.4.2  Maintain water coolers.  7.4.3  Repair water coolers.  7.4.4  Post-service performance audit of HVACR equipment indicates water coolers operation at or above manufacturer’s design specifications, benchmarks, and baselines.	Knowledge and understanding of water coolers. Knowledge of appropriate testing gauges. Understanding of the proper procedures for oxy/acetylene brazing rig.	Appropriate hand tools  Refrigerant manifold gauges and hoses  2-stage vacuum pump  Air/acetylene brazing rig  Leak detector   Digital thermometer  Refrigerant scale
KA7.5	Identify, install, maintain, and repair specific refrigeration system components used in commercial refrigeration.	Number Criteria 7.5.1  Identify specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc. 7.5.2  Install specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc.  7.5.3  Maintain specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc.  7.5.4  Troubleshoot and  replace if necessary specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc.  7.5.5  Post-service performance audit of HVACR equipment indicates refrigeration system components operation at or above manufacturer's design specifications, benchmarks, and baselines.	Knowledge and understanding of refrigeration system accessories and controls. Knowledge of appropriate testing gages. Knowledge and interpretation of pressure/temperature relationships. Understanding of superheat, sub-cooling, charging, and wiring as per EPA guidelines.	Appropriate hand tools  Refrigerant manifold gauges and hoses  Digital thermometer