Occupational Title: Heating, Ventilation, Air Conditioning, and Refrigeration (HVACR) Technician

Transcription

1 Occupational Title: Heating, Ventilation, Air Conditioning, and Refrigeration (HVACR) Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning, and refrigeration systems. Critical Work Functions 1. Operate according to acceptable practices within the workplace environment 2. Diagnose, install, troubleshoot, and repair electrical systems in HVACR equipment AEKS Matrix AEKS Matrix 3. Design, install, and maintain piping systems for HVACR equipment AEKS Matrix 4. Utilize refrigeration principles and practices AEKS Matrix 5. Utilize heating principles and practices in residential and light commercial heating and heat pumps 6. Install, maintain, and repair residential and light commercial air conditioning systems AEKS Matrix AEKS Matrix 7. Inspect, install, maintain, and repair refrigeration systems AEKS Matrix NOTE: The Heating Ventilation, Air Conditioning, and Refrigeration (HVACR) Technician skill standards were reviewed and updated on March 3, 2004, by statewide industry representatives of the Heating, Ventilation, and Air Conditioning Industry Advisory Committee of Eastfield College, Dallas County Community College District, including members of the Air Conditioning Contractors of America (ACCA)-Texas and North Texas chapter. In April 2004 industry representatives of the HVAC Industry Advisory Committee of Vernon College, Wichita Falls, Texas, conducted a second review and update. Recognized by the Texas Skill Standards Board, July 13,

2 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems. Critical Work Function Occupational Skills, Knowledge and Conditions 1 Operate according to acceptable practices within the workplace environment Key Activities Performance Criteria Occupational Skills and Knowledge Those duties or task clusters that are Specific demonstrable necessary to perform each critical work function. KA1.1 Perform operation in a safe manner in accordance with company guidelines and federal, state, and local regulations. KA1.2 Perform operations involving hazardous materials in a safe manner in accordance with federal, state and local regulations. performance and standards that indicate when the key activity has been performed successfully. Number Criteria Apply safety regulations and procedures per OSHA and DOT Handle refrigerant according to EPA regulations Apply and perform according to company guidelines. Number Criteria Identify hazardous substances in the work area Handle hazardous materials according to OSHA regulations Transport hazardous material according to DOT regulations Dispose of hazardous materials di t f d l 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. Knowledge of OSHA, DOT, and EPA rules and regulations. Knowledge and certification in refrigerant recovery, storage, and handling Knowledge of local building and energy safety codes Understanding of ladder safety Knowledge of OSHA, DOT, and EPA rules and regulations Knowledge of local regulations Knowledge of proper refrigeration transportation Knowledge of asbestos rules and regulations Knowledge of Material Safety Data Sheets (MSDS) Conditions Tools, resources and equipment necessary to carry out key activities and their related performance criteria. Appropriate OSHA, DOT, and EPA manuals Refrigerant recovery unit Guidelines of local building and energy safety codes Company guidelines Appropriate OSHA, DOT, and EPA manuals Guidelines of local regulations Material Safety Data Sheets (MSDS) Recognized by the Texas Skill Standards Board, July 13,

3 according to federal, state, and local regulations. KA1.3 Ensure that employees/teams Number Criteria Knowledge of PC usage and develop and improve technical, appropriate software Develop employees interpersonal, and technical and communication skills to provide Basic business writing interpersonal skills. effective customer service Follow company conduct codes to ensure ethical behavior Answer and advise customer in a professional, polite, and thorough manner Solve customer problems by utilizing reference materials and discussing possible solutions with supervisor and co-workers Communicate and translate technical information/terms verbally and/or in writing in a clear, precise, and logical manner in layman terms Read service manuals, forms, and other written materials with comprehension Formal/informal customer surveys indicate general satisfaction with Personal computer Appropriate service manuals Recognized by the Texas Skill Standards Board, July 13,

4 employees/teams. Recognized by the Texas Skill Standards Board, July 13,

5 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 1 Operate according to acceptable practices within the shop environment. Listening Speaking Using Gathering Information and and Analyzing Communi- Information cations Technology Analyzing and Solving Problems Making Decisions and Judgments Organizing and Planning Using Social skills Adaptability Working in Teams Leading Building Self and Others Consensus Career Development Writing Reading Mathematics Science KA 1.1 Perform operations in a safe manner in accordance with federal, state, and local regulations KA 1.2 Perform operations involving hazardous materials in a safe manner in accordance with federal, state and local regulations KA 1.3 Ensure that employees/teams develop and improve technical, interpersonal, and communication skills to provide effective customer service Strategy: Simulation of work activity; oral presentation; paper/pencil Statement of Assessment Tools: Appropriate EPA, OSHA, and DOT manuals, appropriate service manuals, personal computer, refrigerant recovery unit. Recognized by the Texas Skill Standards Board, July 13,

6 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems. Critical Work Function Occupational Skills, Knowledge and Conditions 2 Diagnose, install, troubleshoot, and repair electrical systems in HVACR equipment Key Activities Performance Criteria Occupational Skills and Knowledge Those duties or task clusters that are necessary to perform each critical work function. KA2.1 Apply relevant principles in the selection, installation, and repair of electrical systems. Specific demonstrable performance and standards that indicate when the key activity has been performed successfully. Number Criteria Application of both alternating and direct current theory to air conditioning, heating and refrigeration systems for power and/or control circuits Identify common single and 3-phase power and control circuits Wire series, parallel, and compound circuits utilizing the principles and relationships of Ohm's and Watt's laws Install correctly sized electrical conductors and properly rated insulation. 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. Knowledge and understanding of electrical theory and circuitry Knowledge and application of meter measurement Knowledge of Electrical Code Book (ampacity or wire, wire sizing, and grounding requirements) Knowledge of Ohm s Law for electrical calculations Read and apply wire diagrams, ladder, and pictorial schematics Ability to differentiate low voltage and high voltage circuits Conditions Tools, resources and equipment necessary to carry out key activities and their related performance criteria. Appropriate hand tools Digital multimeter Lap-top computer VOM multimeter Megometer NEC Handbook Clamp-on ammeter Recognized by the Texas Skill Standards Board, July 13,

7 KA2.2 Select, install, and replace electrical motors Install properly sized electrical circuit protection including fuses, circuit breakers, overloads and disconnect switches Inspect and test single and 3-phase transformers Select appropriate single and 3-phase transformers Install single and 3- phase transformers Ground electrical circuits properly Measure electrical current voltage and resistance Post-service performance audit of HVACR equipment indicates electrical systems operating at or above manufacturer s design specifications, benchmarks, and Number Criteria Knowledge and understanding Select electric motor of the design of electrical based on motors (shaded pole, splitphase, Permanent Split manufacturer s specifications for Capacitator-PCM, Integrally different uses and Controlled Motors -ICM, applications. and 3-phase motors) Install and replace Ability to identify and interpret Appropriate hand tools Wheel and pulley pullers Capacitor tester VOM multimeter Megometer Recognized by the Texas Skill Standards B oard, July 13,

8 KA2.3 Wire and troubleshoot electrical controls. various types of electric motors according to the requirement of the situation Install various types of capacitors according to the requirements of the situation Install electric motor protection devices Interpret electric motor specifications Post-service performance audit indicates electric motors operating at or above manufacturer s design specifications, benchmarks, and electric motor specifications and data plate information to replace motors. Knowledge and application of various measuring instruments and testing devices. Knowledge of voltmeter usage to determine proper voltage to motor Knowledge of ammeter usage to determine proper current draw Knowledge of Ohm meter usage to determine proper resistance in motor Number Criteria Knowledge and application of electrical control circuitry Identify and wire safety and operation Knowledge and application of control devices; for meter measurement example, pressure switches, Ability to identify pressure thermostats, etc. switches and electromechanical Identify and wire control devices electromechanical control devices; for example, relays, contactors, magnetic starters, timers, sequencers, etc. Ability to read schematic drawings to check for proper wiring of high and low voltage controls Clamp-on ammeter Appropriate hand tools VOM multimeter Clamp-on ammeter Recognized by the Texas Skill Standards Board, July 13,

9 2.3.3 Identify and wire electronic control devices; for example, ignition modules, electronic timers, etc Wire both power and control circuits of an electric heat pump Wire both power and control circuits of air conditioned, heating, and refrigeration systems Wire low voltage controls for gas furnace Post-service performance audit indicates devices and circuits properly wired according to manufacturer s design specifications, benchmarks, and Ability to read schematic drawings to apply voltmeter probes for testing of voltages at selected circuits Ability to use voltmeter to determine if power off to be able to Ohm out component and circuits for possible faults Ability to use ammeter while circuits energized to determine loads are energized Recognized by the Texas Skill Standards Board, July 13,

10 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 2 Diagnose, install, troubleshoot, and repair electrical systems in HVACR equipment. Listening Speaking Using Gathering Information and and Analyzing Communi- Information cations Technology Analyzing and Solving Problems Making Decisions and Judgments Organizing and Planning Using Social skills Adaptability Working in Teams Leading Building Self and Others Consensus Career Development Writing Reading Mathematics Science KA 2.1 Apply relevant principles in the selection, installation, and repair of electrical systems KA 2.2 Select, install, and replace electrical motors KA 2.3 Wire and troubleshoot electrical controls Strategy: Simulation of work activity, use of audio-visual aids, paper/pencil. Statement of Assessment Tools: Appropriate hand tools, appropriate measuring instruments, NEC Handbook Recognized by the Texas Skill Standards Board, July 13,

11 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, and air conditioning systems. Critical Work Function Occupational Skills, Knowledge and Conditions 3 Design, install, and maintain piping systems for HVACR equipment Key Activities Performance Criteria Occupational Skills and Knowledge Those duties or task clusters that are necessary to perform each critical work function. KA3.1 Identify, install, maintain, and replace drainage and venting systems. Specific demonstrable performance and standards that indicate when the key activity has been performed successfully. Number Criteria Identify properly sized and applied condensate drains and waste drains connected to HVACR equipment and accessories Install properly sized and applied condensate drains and waste drains connected to HVACR equipment and accessories Maintain properly sized and applied condensate drains and waste drains connected to HVACR equipment and accessories Replace properly sized and applied condensate drains 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. Knowledge and application of drain and vent system design Understanding of proper procedures for brazing HVACR piping Knowledge and understanding of reference code books Conditions Tools, resources and equipment necessary to carry out key activities and their related performance criteria. Appropriate hand tools Air/Acetylene brazing torch Recognized by the Texas Skill Standards Board, July 13,

12 KA3.2 Identify, select, and utilize piping systems and components. and waste drains connected to HVACR equipment and accessories Post-service performance audit of HVACR equipment indicates condensate drains and waste drains connected to HVACR equipment and accessories operating at or above manufacturer's design specifications, benchmarks, and Number Criteria Knowledge and application Identify and select of piping materials and fuel and heat design distribution pipes according to sizing and layout requirements Identify and select appropriate piping systems based on pipe selection, pipe size, and system design Select the proper fitting or valve for specific applications; for example, globe valves, gate valves, angle valves, check valves, elbows, tees, Appropriate hand tools Recognized by the Texas Skill Standards Board, July 13,

13 unions, couplings, and half union Utilize pipe accessories, such as flanges, isolators, hangers, expansion joints, expansion, loops, supports, insulation, etc Post-service performance audit of HVACR equipments indicates piping system components operating at or above manufacturer s design specifications, benchmarks, and Recognized by the Texas Skill Standards Board, July 13,

14 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 3 Design, install, and maintain piping systems for HVACR equipment. Listening Speaking Using Gathering Information and and Analyzing Communi- Information cations Technology Analyzing and Solving Problems Making Decisions and Judgments Organizing and Planning Using Social skills Adaptability Working in Teams Leading Building Self and Others Consensus Career Development Writing Reading Mathematics Science KA 3.1 Identify, install, maintain, and replace drainage and venting systems KA 3.2 Identify, select, and utilize piping systems and components Strategy: Simulation of work activity, paper/pencil. Tools: Appropriate hand tools, air/acetylene brazing unit. Statement of Assessment Recognized by the Texas Skill Standards Board, July 13,

15 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems. Critical Work Function Occupational Skills, Knowledge and Conditions 4 Utilize refrigeration principles and practices Key Activities Performance Criteria Occupational Skills and Conditions Knowledge Those duties or task clusters that are necessary to perform each critical work function. KA4.1 Diagnose refrigeration systems by applying appropriate theories. Number Specific demonstrable performance and standards that indicate when the key activity has been performed successfully. Criteria Apply theory of heat transfer in the diagnosis of refrigeration systems Apply the properties of different refrigerants in different applications Apply proper diagnostics to the refrigeration cycle of a mechanical system Utilize pressure, temperature curves and charts to solve problems. 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. Knowledge of refrigeration system principles and circuitry Understanding of theory of heat transfer Knowledge of Boyles Law Knowledge of Chale s Law Knowledge of Dalton s law Knowledge of 1 st and 2 nd Law of Thermo-Dynamics Knowledge and interpretation of pressure/temperature relationships to convert pressures and temperatures of refrigerants and to identify appropriate refrigerants for application Ability to read and apply enthalpy charts Tools, resources and equipment necessary to carry out key activities and their related performance criteria. Appropriate hand tools Refrigerant manifold gauge with hoses Digital thermometer Recognized by the Texas Skill Standards Board, July 13,

16 KA4.2 Select, install, maintain, and repair refrigeration system components. KA4.3 Select, install, maintain, and repair refrigeration system accessories. Number Criteria Knowledge and understanding Appropriate hand tools Select compressors, of four major refrigeration condensers, system components VOM multimeter metering devices, (compressors, condensers, and evaporators. metering devices, and Refrigerant manifold gauges Install compressors, evaporators) condensers, Electronic temperature stations metering devices, Knowledge and understanding and evaporators. of evacuation 2-stage vacuum pump Inspect and test Knowledge and application Micron gauge compressors, of various measuring condensers, instruments and testing Oxy/acetylene welding set metering devices, devices and evaporators. Leak detector Repair compressors, Understanding of proper condensers, procedures for oxy/acetylene Ammeter metering devices, welding and evaporators Post-service performance audit of HVACR equipment indicates refrigeration system components operation at or above manufacturer s design specifications, benchmarks, and Number Criteria Knowledge and understanding Appropriate hand tools Select refrigeration of evacuation procedures. system VOM multimeter accessories; for Knowledge and application of example, receivers, various measuring instruments Refrigerant manifold gauges accumulators, and testing devices. filter/dryers, sight 2-stage vacuum pump glasses, valves, Understanding of proper etc. procedures for oxy/acetylene Micron gauge ldi Recognized by the Texas Skill Standards Board, July 13,

17 Install refrigeration system accessories; for example, receivers, accumulators, filter/dryers, sight glasses, valves, etc. Maintain refrigeration system accessories; for example, receivers, accumulators, filter/dryers, sight glasses, valves, etc. Repair refrigeration system accessories; for example, receivers, accumulators, filter/dryers, sight glasses, valves, etc. Post-service performance audit of HVACR equipment indicates refrigeration system accessories w elding. operating at or above manufacturer s design specifications, benchmarks, and Oxy/acetylene welding set Leak detector Ammeter Recognized by the Texas Skill Standards Board, July 13,

18 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 4 Utilize refrigeration principles and practices. Listening Speaking Using Gathering Information and and Analyzing Communi- Information cations Technology Analyzing and Solving Problems Making Decisions and Judgments Organizing and Planning Using Social skills Adaptability Working in Teams Leading Building Self and Others Consensus Career Development Writing Reading Mathematics Science KA 4.1 Diagnose refrigeration systems by applying appropriate theories KA 4.2 Select, install, maintain, and repair refrigeration system components KA 4.3 Select, install, maintain, and repair refrigeration system accessories Strategy: Simulation of work activity, oral presentation, paper/pencil. Statement of Assessment Tools: Appropriate hand tools, appropriate measuring instruments and testing devices, oxy/acetylene welding set. Recognized by the Texas Skill Standards Board, July 13,

19 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, and air conditioning systems. Critical Work Function Occupational Skills, Knowledge and Conditions 5 Utilize heating principles and practices in residential and light commercial heating and heat pumps Key Activities Performance Criteria Occupational Skills and Knowledge Conditions Those duties or task clusters that are necessary to perform each critical work function. KA5.1 Apply heating principles to HVACR system. KA5.2 Identify, diagnose, install, maintain, and replace electric air, forced air, gas and electric heating systems. Specific demonstrable performance and standards that indicate when the key activity has been performed successfully. Number Criteria Identify and diagnose type of fuel and operating fuel systems operating conditions Identify and diagnose types of fuel systems, such as propane, butane and natural gas Supervisor's review indicates design specifications adequate for specified HVACR systems. Number Criteria Identify and diagnose electric resistance heat systems and forced-air heating systems Install electric resistance heat systems and forced-air heating systems Maintain electric resistance heat systems Those skills and knowledge Tools, resources and that are specific to the equipment necessary to carry occupation, such as technical out key activities and their processes or procedures related performance criteria. common across the occupation that are critical to the related key activity. Knowledge and understanding of heating principles. Understanding and application of drafting principles and tools. Knowledge of heating system principles. Knowledge and understanding of LP and natural gas heating applications. Pressure gauges Manometer Appropriate hand tools VOM multimeter Manometer Ammeter Knowledge and application of Digital thermometer various meter measurements. Recognized by the Texas Skill Standards Board, July 13,

20 KA5.3 Identify, diagnose, install, maintain, and replace residential and gas-fired hydronic heating systems. and forced-air heating Ability to use voltmeter to systems. determine proper voltage Repair electric resistance heat systems and forcedair heating systems. determine heating element Ability to use ammeter to Post-service performance operation audit of HVACR equipment indicates Ability to use Ohm Meter to electric resistance heat determine load winding and system operating at or element condition above manufacturer s design specification, Ability to use temperature benchmarks, and meter to determine air temperature rise Number Criteria Identify and diagnose hydronic gas and electric heat systems Install hydronic gas and electric heat systems Maintain hydronic gas and electric heat systems Repair hydronic gas and electric heat systems Identify and select liquid, natural gas and oil pipe sizes and layout Post-service performance audit of HVACR equipment indicates hydronic gas and electric heat system operating at or above manufacturer's design specifications, benchmarks, and Ability to use temperature rise method to determine airflow. Knowledge and Appropriate hand tools understanding of gas-fired hydronic heat systems VOM multimeter Knowledge and application of Manometer meter measurement Digital thermometer Knowledge and understanding of sizing and layout of liquid and natural gas pipes Knowledge of venting Knowledge and understanding of National Fuel Gas Code Recognized by the Texas Skill Standards Board, July 13,

21 KA5.4 Diagnose, maintain, and repair Number Criteria iteria compression and resistive Diagnose problems heating systems in the heat related to vapor pump. compression heat pump cycles Inspect supplementary heat for proper operation Repair the supplementary heat Determine balance point of heat pumps, Identify and calculate heating capacity based on outdoor ambient temperature Post-service performance audit of HVACR equipment indicates compression and resistive heating system operating at or above manufacturer s design specifications, benchmarks, and Knowledge and understanding of effect of outdoor temperature on heating capacity Ability to calculate balance point using heat load and manufacturers data Ability to calculate heat loads for proper sizing of system and to calculate heating capacity required of structure based on heat loss Knowledge of heat pumps and supplementary heat Knowledge and application of various measuring instruments and testing devices Knowledge and interpretation of pressure/temperature relationships Appropriate hand tools VOM multimeter Ammeter Refrigerant gauge manifold Digital thermometer KA5.5 Identify, diagnose, maintain, and repair electrical circuits for all types of heat pumps. Number Criteria Identify and diagnose the electrical circuits of air to air, water to air, and ground to air heat pumps Inspect and adjust the electrical circuits of air to air, water to air, and ground to air heat Knowledge of electrical circuitry as used in heat pumps Knowledge and application of meter measurement Knowledge and understanding of manufacturing maintenance Appropriate hand tools VOM multimeter Ammeter Digital thermometer Recognized by the Texas Skill Standards Board, July 13,

22 KA5.6 Verify proper operation of defrost controls in heat pump systems. pumps Repair the electrical circuits of air to air, water to air, and ground to air heat pumps Post-service performance audit of HVACR equipment indicates electrical circuits for all types of heat pumps operating at or above manufacturer's design specifications, benchmarks, and Number Criteria Inspect proper operation of defrost controls in heat pump systems; for example, electronic demand defrost, pressure, time/temperature, time, etc Repair and/or replace defrost controls in heat pump systems; for example, electronic demand defrost, pressure, time/temperature, time, etc Post-service performance audit of HVACR equipment indicates defrost controls in heat pump system operating at or above manufacturer s design specifications, guidelines. Ability to use wiring diagrams for installation and troubleshooting Ability to use ammeter, vo ltmeter and Ohm meter Ability to identify various heat pump defrost control types Knowledge and application of meter measurement Knowledge and understanding of manufacturing guidelines Ability to differentiate methods for heat pump defrost and initiate defrost for troubleshooting procedures Ability to use wiring diagrams for troubleshooting and installation Appropriate hand tools VOM multimeter Ammeter Digital thermometer Refrigerant gauges Recognized by the Texas Skill Standards Board, July 13,

23 benchmarks and Recognized by the Texas Skill Standards Board, July 13,

24 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 5 Utilize heating principles and practices in residential and light commercial heating and heat pumps. Listening Speaking Using Gathering Analyzing Making Organizing Using Adaptability Working Leading Building Self and Writing Reading Mathematics Science Information and and Decisions and Social in Consensu and Analyzing Solvin g and Planning skills Teams Development Communi- Information Problems Judgments cations Technology KA 5.1 Apply ply heating principles to HVACR design KA 5.2 Identify, diagnose, install, maintain, and replace electric ectric air, forced air, gas and electric heating systems KA 5.3 Identify, diagnose, install, maintain, and replace re sidential and gas-fired hydronic heating systems KA 5.4 Diagnose, maintain, and repair r compression on and resistive heating systems in the heat pump KA 5.5 Identify, diagnose, maintain, and repair electrical circuits for all types t s of heat pumps KA 5.6 Verify proper operation of defrost controls in heat pump systems Statement of Assessment Strategy: Simulation of work activity, oral presentation, paper/pencil. Tools: Personal computer, appropriate hand tools, appropriate measuring instruments and testing device s. Recognized by the Texas Skill Standards Board, July 13,

25 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, i air conditioning and refrigeration systems. Critical Work Function Occupational Skills, Knowledge and Conditions and 6 Design, install, maintain, and repair residential and light commercial air conditioning systems Key Activities Those duties or task clusters that are necessary to perform each critical work function. KA6.1 Identify, diagnose, install, maintain, and repair air conditioning systems. Performance Criteria Occupational Skills and Knowledge Specific demonstrable performance Those skills and knowledge and standards that indicate when that are specific to the the key activity has been performed occupation, such as technical successfully. processes or procedures common across the occupation that are critical to the related key activity. Number Criteria Identify and diagnose air conditioning systems (split, packages) as to size and capacity style, taking into account temperature, humidity, refrigeration pressures, heat gain and heat loss of structure, refrigerant leaks, air movement, etc Install air conditioning systems taking into account temperature, humidity, heat gain and heat loss of structure, air movement, etc Understanding of residential and light commercial air conditioning systems. Understanding of psychrometrics Knowledge and application of various measuring instruments and testing devices. Knowledge of manufacturers installation instructions for proper location of equipment and lines VOM multimeter Ammeter Conditions Tools, resources and equipment necessary to carry out key activities and their related performance criteria. Appropriate hand tools (circular saws) Manifold gauge 2-stage vacuum pump Micron gauge Digital thermometer Psychrometer Ability to use reciprocating Psychrometric chart and circular saws Air-flow meter Maintain air Ability to braze copper tubing conditioning systems Heat loads taking into account Ability to measure temperature, humidity, temperature difference to Duct Calculator heat gain and heat loss determine proper Recognized by the Texas Skill Standards B oard, July 13,

26 KA6.2 Identify, diagnose, install, maintain, and repair air distribution systems, condensate drain systems, and air filtration systems. of structure, air movement, etc Repair air conditioning systems taking into account temperature, humidity, heat gain and heat loss of structure, air movement, etc Post-service performance audit of HVACR equipment meets mechanical codes and indicates air conditioning systems operating at or above manufacturer s design specifications, benchmarks, and Number Criteria Identify and diagnose air distribution systems, condensate drain systems, and air filtration systems Install air distribution systems, condensate drain systems, and air filtration systems Maintain air distribution systems, condensate drain systems, and air filtration systems Repair air distribution systems, condensate drain systems, and air filtration systems Post-service performance audit of temperature across evaporator Ability to use nitrogen, ultrasonic, and electronic leak detectors to find refrigerant links Knowledge of HVACR air distribution, condensate drain systems, and air filtration systems Understanding of the proper procedures for air/acetylene torch rig Understanding of duct sizing for proper CFM (cubic feet per minute) air flow Ability to use duct calculator Ability to use heat loss/heat gain calculations to determine CFM requirements Ability to use magnetic gauges to measure static Nitrogen, ultrasonic, and electronic leak detectors Appropriate hand tools Air/Acetylene torch rig Ductulator Recognized by the Texas Skill Standards Board, July 13,

27 HVACR equipment indicates air distribution, condensate drain, and air filtration systems operating at or above manufacturer's design specificat ions, benchmarks, and pressure and velocity pressure Ability to use temperature rise method for determining CFM Recognized by the Texas Skill Standards Board, July 13,

28 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 6 Design, install, maintain, and repair residential and light commercial air conditioning systems. Listening Speaking Using Gathering Analyzing Making Organizing Using Adaptability Working Leading Building Self and Writing Reading Mathematics Science Information and and Decisions and Social in Other s Consensu s Career and Analyzing Solving and Planning skills Teams Develop- Communi- Information Problems Judgments ment cations Technology KA 6.1 Identify, diagnose, install, maintain, and repair air conditioning systems KA 6.2 Identify, diagnose, install, maintain, and repair air distribution systems, stems, condensate drain systems, and air filtration systems Statement of Assessment Strategy: Simulation of work activity, paper/pencil, oral presentation. Tools: Appropriate hand tools, appropriate measuring instruments and testing devices, psychrometric charts, air/acetylene torch rig, ductulator. Recognized by the Texas Skill Standards Board, July 13,

29 Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems. Critical Work Function Occupational Skills, Knowledge and Conditions 7 Identify, install, maintain, and repair refrigeration systems Key Activities Performance Criteria Occupational Skills and Conditions Knowledge Those duties or task clusters that are necessary to perform each critical work function. KA7.1 Identify, install, maintain, and repair mechanical refrigeration systems. Specific demonstrable performance and standards that indicate when the key activity has been performed successfully. Number Criteria Identify mechanical refrigeration systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration systems Install mechanical refrigeration systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration systems. 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. Knowledge and understanding of refrigeration systems VOM multimeter Knowledge and understanding of charging, wiring, and Ammeter recovery per EPA guidelines Refrigerant manifold gauges Knowledge and application of various measuring instruments Digital thermometer and testing devices Electronic leak detector Ability to identify refrigerants appropriate to meet required Oxy/acetylene brazing rig temperature and per manufacturer s specifications 2-stage vacuum pump Knowledge and unders tanding Micron gauge of alternative refrigerants and lubricants Understanding of proper procedures for oxy/acetylene brazing rig to braze in refrigerant lines Tools, resources and equipment necessary to carry out key activities and their related performance criteria. Appropriate hand tools Recognized by the Texas Skill Standards Board, July, 2004

30 KA7.2 Identify, install, maintain, and repair electric and hot gas defrost systems in refrigeration systems Maintain mechanical refrigeration systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration systems Repair mechanical refrigeration systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration systems Post-service performance audit of HVACR equipment indicates mechanical refrigeration system operating at or above manufacturer's design specifications, benchmarks, and Number Criteria Identify electric and hot-gas defrost systems in refrigeration systems Install electric and hot-gas defrost systems in refrigeration systems. 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 Appropriate hand tools VOM multimeter Ammeter Digital thermometer Manifold gauges

31 KA7.3 Install, maintain, and repair flake and cube ice makers Maintain electric and hot gas defrost systems in refrigeration systems D etermine proper defrost timing schedules with customer Repair electric and hot-gas defrost systems in refrigeration systems Post-service performance audit of HVACR equipment indicates electric and hot gas defrost s ystems operation at or above manufacturer s design specifications, benchmarks, and of pressure/temperature relationships Use pressure/temperature relationships to time properly defrost cycles Number Criteria Knowledge and understan of ice makers Install flake and cube ice makers Maintain flake and cube ice makers Repair flake and cube ice makers Post-service performance audit of HVACR equipment indicates flake and cube ice maker operation at or above manufacturer's design specifications, ding Appropriate hand tools VOM multimeter Knowledge and application of various measuring instruments Ammeter and testing devices Gauge manifold and hoses Understanding of the proper procedures for oxy/acetylene 2-stage vacuum pump brazing rig Electronic leak detector Micron gauge Oxy/acetylene brazing rig Recognized by the Texas Skill Standards Board, July 13,

32 KA7.4 Install, maintain, and repair water Number coolers KA7.5 Identify, install, maintain, and repair specific refrigeration system components used in commercial refrigeration Number benchmarks, and Criteria Install water coolers. Maintain water coolers. Repair water coolers. Post-service performance audit of HVACR equipment indicates water coolers operation at or above manufacturer s design specifications, benchmarks, and Criteria Identify specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc. Knowledge and understanding of water coolers Knowledge of appropriate testing gauges Understanding of the proper procedures for oxy/acetylene brazing rig Knowledge and understanding of refrigeration system accessories and controls Knowledge of appropriate testing gages Knowledge and interpretation of pressure/temperature relationships Install specific Understanding of superheat, refrigeration system sub-cooling, charging, and components used in wiring as per EPA guidelines commercial refrigeration; for example, low ambient controls, evaporator and crankcase Digital thermometer Appropriate hand tools Refrigerant manifold gauges and hoses 2-stage vacuum pump Air/acetylene brazing rig Leak detector Digital thermometer Refrigerant scale Appropriate hand tools Refrigerant manifold gauges and hoses Digital thermometer Recognized by the Texas Skill Standards Board, July 13,

33 pressure regulators, etc Maintain specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc Troubleshoot and replace if necessary specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc Post-service performance audit of HVACR equipment indicates refrigeration system components operation at or above manufacturer's design specifications, benchmarks, and Recognized by the Texas Skill Standards Board, July 13,

34 Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 7 Identify, install, maintain, and repair commercial refrigeration systems. Listening Speaking Using Gathering Information and and Analyzing Communi- Information cations Technology Analyzing and Solving Problems Making Decisions and Judgments Organizing and Planning Using Social skills Adaptability Working in Teams Leading Building Self and Others Consensus Career Development Writing Reading Mathematics Science KA 7.1 Identify, install, maintain, and repair mechanical refrigeration systems KA 7.2 Identify, install, maintain, and repair electric and hot gas defrost systems in refrigeration systems KA 7.3 Install, maintain, and repair flake and cube ice makers KA 7.4 Install, maintain, and repair water coolers KA 7.5 Identify, install, maintain, and repair specific refrigeration system components used in commercial refrigeration Statement of Assessment Strategy: Simulation of work activity, paper/pencil, oral presentations. Tools: Appropriate hand tools, appropriate measuring instruments and testing devices, oxy/acetylene brazing rig, vacuum pump Recognized by the Texas Skill Standards Board, July 13,