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Texas Skill Standards Board

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

AEKS Matrix

2. Diagnose, install, troubleshoot, and repair electrical systems in HVACR equipment

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

AEKS Matrix

6. Install, maintain, and repair residential and light commercial air conditioning systems

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, 2004 1

http://www.tssb.org/wwwpages/hvac/matrix1.htm








Occupational Title: HVACR Technician

Critical Work Function 1 Operate according to acceptable practices within the workplace environment

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.

KA1.1 Perform operation in a safe manner in accordance with company guidelines and federal, state, and local regulations.

Number Criteria 1.1.1 Apply safety

regulations and procedures per OSHA and DOT.

1.1.2 Handle refrigerant according to EPA regulations.

1.1.3 Apply and perform according to company guidelines.

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

Appropriate OSHA, DOT, and EPA manuals Refrigerant recovery unit Guidelines of local building and energy safety codes Company guidelines

KA1.2 Perform operations involving hazardous materials in a safe manner in accordance with federal, state and local regulations.

Number Criteria 1.2.1 Identify hazardous

substances in the work area.

1.2.2 Handle hazardous materials according to OSHA regulations.

1.2.3 Transport hazardous material according to DOT regulations.

1.2.4 Dispose of hazardous materials

di t f d l

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)

Appropriate OSHA, DOT, and EPA manuals Guidelines of local regulations Material Safety Data Sheets (MSDS)


Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems.


according to federal, state, and local regulations.

KA1.3 Ensure that employees/teams develop and improve technical, interpersonal, and communication skills to provide effective customer service.

Number Criteria Knowledge of PC usage and appropriate software Basic business writing

Personal computer Appropriate service manuals


1.3.1 Develop employees’ technical and interpersonal skills.

1.3.2 Follow company conduct codes to ensure ethical behavior.

1.3.3 Answer and advise customer in a professional, polite, and thorough manner.

1.3.4 Solve customer problems by utilizing reference materials and discussing possible solutions with supervisor and co-workers

1.3.5 Communicate and translate technical information/terms verbally and/or in writing in a clear, precise, and logical manner in layman terms.

1.3.6 Read service manuals, forms, and other written materials with comprehension.

Formal/informal customer surveys indicate general satisfaction with

1.3.7


employees/teams.



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

Information and Communi- cations Technology

Gathering and Analyzing Information

Analyzing and Solving Problems

Making Decisions and Judgments

Organizing and Planning

Using Social skills

Adaptability Working in Teams

Leading Others

Building Consensus

Self and Career Develop-ment

Writing Reading Mathe-matics

Science

KA 1.1 Perform operations in a safe manner in accordance with federal, state, and local regulations. 4 3 3 3 3 3 4 3 3 4 3

KA 1.2 Perform operations involving hazardous materials in a safe manner in accordance with federal, state and local regulations. 4 3 3 3 3 3 3 3 3 4 3

KA 1.3 Ensure that employees/teams develop and improve technical, interpersonal, and communication skills to provide effective customer service. 4 3 3 3 3 3 4 3 3 3 3 3 3 3 4 3

Statement of Assessment Strategy: Simulation of work activity; oral presentation; paper/pencil Tools: Appropriate EPA, OSHA, and DOT manuals, appropriate service manuals, personal computer, refrigerant recovery unit.



Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems. Critical Work Function 2 Diagnose, install, troubleshoot, and repair electrical systems in HVACR equipment



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.



KA2.1 Apply relevant principles in the selection, installation, and repair of electrical systems.

Number Criteria 2.1.1 Application of both

alternating and direct current theory to air conditioning, heatingand refrigeration systems for power and/or control circuits.

2.1.2 Identify common single and 3-phase power and control circuits.

2.1.3 Wire series, parallel, and compound circuits utilizing the principles and relationships of Ohm's and Watt's laws.

2.1.4 Install correctly sized electrical conductors and properly rated insulation.

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

Appropriate hand tools Digital multimeter Lap-top computer VOM multimeter Megometer NEC Handbook Clamp-on ammeter



Recognized by the Texas Skill Standards oard, JuB ly 1 7

3, 2004

2.1.5 Install properly sizedelectrical circuit protection including fuses, circuit breakers, overloads and disconnect switches.

2.1.6 Inspect and test single and 3-phase transformers.

2.1.7 Select appropriate single and 3-phase transformers.

2.1.8 Install single and 3-phase transformers.

2.1.9 Ground electrical circuits properly.

2.1.10 Measure electrical current voltage and resistance.

2.1.11 Post-serviceperformance audit of HVACR equipment indicates electrical systems operating at or above manufacturer’s design specifications, benchmarks, and baselines.

KA2.2 Select, install, and replace electrical motors.

Number Criteria Knowledge and understanding of the design of electrical motors (shaded pole, split-phase, Permanent Split Capacitator-PCM, Integrally Controlled Motors -ICM, and 3-phase motors) Ability to identify and interpret

Appropriate hand tools Wheel and pulley pullers Capacitor tester VOM multimeter Megometer

2.2.1 Select electric motor based on manufacturer’s specifications for different uses and applications.

2.2.2 Install and replace


Recognized by the Texas Skill Standards Board, July 3, 2004 1 8

various types of electric motors according to the requirement of the situation.

2.2.3 Install various types of capacitors according to the requirements of the situation.

2.2.4 Install electric motor protection devices.

2.2.5 Interpret electric motor specifications.

2.2.6 Post-serviceperformance audit indicates electric motors operating at or above manufacturer’s design specifications, benchmarks, and baselines.

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

Clamp-on ammeter

KA2.3 Wire and troubleshoot electrical controls.

Number Criteria Knowledge and application of electrical control circuitry Knowledge and application of meter measurement Ability to identify pressure switches and electromechanical control devices Ability to read schematic drawings to check for proper wiring of high and low voltage controls

Appropriate hand tools VOM multimeter Clamp-on ammeter

2.3.1 Identify and wire safety and operation control devices; for example, pressure switches, thermostats, etc.

2.3.2 Identify and wire electromechanical control devices; for example, relays, contactors, magnetic starters, timers, sequencers, etc.


2.3.3 Identify and wire electronic control devices; for example, ignition modules, electronic timers, etc.

2.3.4 Wire both power and control circuits of an electric heat pump.

2.3.5 Wire both power and control circuits of air conditioned, heating, and refrigeration systems.

2.3.6 Wire low voltage controls for gas furnace.

2.3.7 Post-service performance audit indicates devices and circuits properly wired according to manufacturer’s design specifications, benchmarks, and baselines.

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



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






Using Social skills


Leading Others

Building Consensus



Science

KA 2.1 Apply relevant principles in the selection, installation, and repair of electrical systems. 3 3 4 4 4 3 3 3 3 3 3 4 3

KA 2.2 Select, install, and replace electrical motors. 3 3 4 4 4 3 3 3 3 3 3 3 3

KA 2.3 Wire and troubleshoot electrical controls. 3 3 4 4 4 3 3 3 3 3 3 3

Statement of Assessment Strategy: Simulation of work activity, use of audio-visual aids, paper/pencil. Tools: Appropriate hand tools, appropriate measuring instruments, NEC Handbook



Occupational Title: HVACR Technician Key Purpose: Diagnose, install, service, and repair heating, ventilation, and air conditioning systems. Critical Work Function 3 Design, install, and maintain piping systems for HVACR equipment



Conditions


function.






key activity.



KA3.1 Identify, install, maintain, and replace drainage and venting systems.

Number Criteria 3.1.1 Identify properly

sized and applied condensate drains and waste drains connected to HVACR equipment and accessories.

3.1.2 Install properly sized and applied condensate drains and waste drains connected to HVACR equipment and accessories.

3.1.3 Maintain properly sized and applied condensate drains and waste drains connected to HVACR equipment and accessories.

3.1.4 Replace properly sized and applied condensate drains

Knowledge and application of drain and vent system design Understanding of proper procedures for brazing HVACR piping Knowledge and understanding of reference code books

Appropriate hand tools Air/Acetylene brazing torch



and waste drains connected to HVACR equipment and accessories.

3.1.5 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 baselines.

KA3.2 Identify, select, and utilize piping systems and components.

Number Criteria Knowledge and application of piping materials and design

Appropriate hand tools


3.2.1 Identify and select fuel and heat distribution pipes according to sizing and layout requirements.

3.2.2 Identify and select appropriate piping systems based on pipe selection, pipe size, and system design.

3.2.3 Select the proper fitting or valve for specific applications; for example, globe valves, gate valves, angle valves, check valves, elbows, tees,


unions, couplings, and half union.

3.2.4 Utilize pipe accessories, such as flanges, isolators, hangers, expansion joints, expansion, loops, supports, insulation, etc.

3.2.5 Post-service performance audit of HVACR equipments indicates piping system components operating at or above manufacturer’s design specifications, benchmarks, and baselines.



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






Using Social skills


Leading Others

Building Consensus



Science

KA 3.1 Identify, install, maintain, and replace drainage and venting systems. 3 4 4 4 3 3 3 2 3 3 3 3

KA 3.2 Identify, select, and utilize piping systems and components. 3 4 4 4 3 3 3 2 3 3 3 3

Statement of Assessment Strategy: Simulation of work activity, paper/pencil. Tools: Appropriate hand tools, air/acetylene brazing unit.


Key Purpose: Diagnose, install, service, and repair heating, ventilation, air conditioning and refrigeration systems. Critical Work Function 4 Utilize refrigeration principles and practices



Conditions


function.

Specific demonstrable performance and standards that

indicate when the key activity has been performed successfully.



common across the occupation that are critical to

the related key activity.



KA4.1 Diagnose refrigeration systems by applying appropriate theories.

Number Criteria 4.1.1 Apply theory of heat

transfer in the diagnosis of refrigeration systems.

4.1.2 Apply the properties of different refrigerants in different applications.

4.1.3 Apply proper diagnostics to the refrigeration cycle of a mechanical system.

4.1.4 Utilize pressure, temperature curves and charts to solve problems.

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 1st and 2nd 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

Appropriate hand tools Refrigerant manifold gauge with hoses Digital thermometer





KA4.2 Select, install, maintain, and repair refrigeration system components.

Number Criteria 4.2.1 Select compressors,

condensers, metering devices,and evaporators.

4.2.2

Install compressors,condensers, metering devices,and evaporators.

4.2.3

Inspect and tescompressors, condensers, metering devices,and evaporators.

t

4.2.4

Repair compressors,condensers, metering devices,and evaporators.

4.2.5 f

,

Post-serviceperformance audit oHVACR equipment indicates refrigeration systemcomponents operation at orabove manufacturer’sdesign specificationsbenchmarks, andbaselines.

nowledge and understanding f four major refrigeration ystem components ompressors, condensers, etering devices, and vaporators)

nowledge and understanding f evacuation

nowledge and application f various measuring struments and testing evices

nderstanding of proper rocedures for oxy/acetylene elding


VOM multimeter

Refrigerant manifold gauges

Electronic temperature stations

Micron gauge

Oxy/acetylene welding set

Leak detector

Ammeter

KA4.3 Select, install, maintain, and repair refrigeration system accessories.

Number Criteria 4.3.1 Select refrigeration

system accessories; for example, recaccumulators, filter/dryers, sight glasses, valves, etc.

nowledge and understanding f evacuation procedures.

nowledge and application of various measuring instruments

nd testing devices.

procedures for oxy/acetylene ldi

Appropriate hand tools VOM multimeter

Refrigerant manifold gauges

2-stage vacuum pump

Micron gauge

Kos(cme Ko Koind Upw

2-stage vacuum pump

eivers,

Ko K

a Understanding of proper



4.3.2

for vers,

Install refrigeration system accessories;example, receiaccumulators, filter/dryers, sight glasses, valves, etc. Maintain refrigeration accessories; foexample, receiveraccumulators, filter/dryers, sight glasses, valves, etc. Repair refrigsystem accessories; for example, receivers, accumulators, filter/dryers, sight glasses, valves, etc. Post-service performance audit of HVACR equipment indicates refrigeration systeaccessories

elding. Oxy/acetylene welding set

Leak detector

Ammeter

4.3.3 system

r s,

4.3.4 eration

4.3.5

m

operating at or above manufacturer’s design specifications, benchmarks, and baselines.

w



Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 4 Utilize refrigeration principles and practices. Listening Speaking Using






Using Social skills


Leading Others

Building Consensus



Science

KA 4.1 Diagnose refrigeration systems by applying appropriate theories. 3 3 4 4 4 3 3 3 3 3 3 2 3 3 3

KA 4.2 Select, install, maintain, and repair refrigeration system components. 3 3 4 4 4 3 3 3 3 3 3 2 3 3 3

KA 4.3 Select, install, maintain, and repair refrigeration system accessories. 3 3 4 4 4 3 3 3 3 3 3 2 3 3 3

Statement of Assessment Strategy: Simulation of work activity, oral presentation, paper/pencil. Tools: Appropriate hand tools, appropriate measuring instruments and testing devices, oxy/acetylene welding set.


Key Purpose: Diagnose, install, service, and repair heating, ventilation, and air conditioning systems. Critical Work Function 5 Utilize heating principles and practices in residential and light commercial heating and heat pumps



Conditions


work function.

Specific demonstrable performance and standards that indicate when the

key activity has been performed successfully.







KA5.1 Apply heating principles to HVACR system.

Number Criteria 5.1.1 Identify and diagnose type

of fuel and operating fuel systems operating conditions.

5.1.2 Identify and diagnose types of fuel systems, such as propane, butane and natural gas.

5.1.3 Supervisor's review indicates design specifications adequate for specified HVACR systems.

Knowledge and understanding of heating principles. Understanding and application of drafting principles and tools.

Pressure gauges Manometer

KA5.2 Identify, diagnose, install, maintain, and replace electric air, forced air, gas and electric heating systems.

Number Criteria 5.2.1 Identify and diagnose electric

resistance heat systems and forced-air heating systems.

5.2.2 Install electric resistance heat systems and forced-air heating systems.

5.2.3 Maintain electric resistance heat systems

Knowledge of heating system principles. Knowledge and understanding of LP and natural gas heating applications. Knowledge and application of various meter measurements.

Appropriate hand tools VOM multimeter Manometer Ammeter Digital thermometer





and forced-air heating systems. Repair electric resistaheat systems and forced-air heating systems. Post-service performancaudit of HVACR equipment indicates electric resistance hsystem operating at or above manufacturer’s design specification, benchmarks, and baselines.

Ability to use voltmeter to determine proper voltage

bility to use ammeter to determine heating element

peration

Ability to use Ohm Meter to

ement condition

Ability to use temperature meter to determine air

mperature rise

Ability to use temperaturmethod to determine airflow.

hydronic heating systems.

nowledge and nderstanding of gas-fired

hydronic heat systems

Knowledge and application of eter measurement

nowledge and understanding of sizing and layout of liquid and natural

as pipes

nowledge of venting

Knowledge and

understanding of National Fuel Gas Code

Manometer

Digital thermometer

5.2.4 nce

5.2.5 e

eat

A

o

determine load winding and el

te

e rise

KA5.3 Identify, diagnose, install, maintain, and replace residential and gas-fired

Ku

m K

g

K

Appropriate hand tools VOM multimeter


Number Criteria 5.3.1 Identify and diagnose

hydronic gas and electric heat systems.

5.3.2 Install hydronic gas and electric heat systems.

5.3.3 Maintain hydronic gas and electric heat systems.

5.3.4 Repair hydronic gas and electric heat systems.

5.3.5 Identify and select liquid, natural gas and oil pipe sizes and layout.

5.3.6 Post-service performance audit of HVACR equipment indicates hydronic gas and electric heat system operating at or above manufacturer's design specifications, benchmarks, and


13, 2004

21

baselines.

compression and resistive heating systems in the heat pump.

Cr iteria5.4.1 Diagnose problems

related to vapor compression heat pump cycles.

5.4.2 Inspect supplementary heat for proper

operation. 5.4.3

Repair the supplementary heat.

5.4.4 Determine balance point of heat pumps,

5.4.5

nt

Identify and calculate heating capacity based on outdoor ambietemperature.

5.4.6

er’s ns,

baselines.

Post-service performance audit of HVACR equipment indicates compression and resistive heating system operating at or above manufacturdesign specificatiobenchmarks, and

understanding of effect of utdoor temperature on eating capacity

Ability to calculate balance

oh

oint using heat load and anufacturers’ data

Ability to calculate heat loads r proper sizing of system

nd to calculate heating capacity required of structure

ased on heat loss

Knowledge of heat pumps

nd supplementary heat

owledge and application Kv

nrious measuring struments and testing evices

pressure/temperature lationships

VOM multimeter

Ammeter

Digital thermometer

and repair electrical circuits fall types of heat pumps.

rcuitry as used in heat umps

eter measurement

Knowledge and nderstanding of

manufacturing maintenance


VOM multimeter

Ammeter

Digital thermometer

KA5.4 Diagnose, maintain, and repair Number

Knowledge and

pm

foa

b

a

of a

ind Knowledge and interpretation ofre


Refrigerant gauge manifold

KA5.5 Identify, diagnose, maintain, or

Knowledge of electrical cip Knowledge and application of m

u

Recognized by the Texas Skill Standards Board, July


the electrical circuits of air to air, water to air, and ground to air heat pumps.

5.5.2 Inspect and adjust the electrical circuits of air to air, water to air, and ground to air heat

Criteria


pumps. 5.5.3 Repair the electrical

circuits of air to air, water to air, and ground to air

heat pumps. 5.5.4

sign

Post-service performance audit of HVACR equipment indicates electrical circuits for all types of heat pumps operating at or above manufacturer's despecifications, benchmarks, and baselines.

g Ability to use wiring diagrams fotr

o

uidelines.

r installation and oubleshooting

Ability to use ammeter,

v ltmeter and Ohm meter

bility to identify various heat pump defrost control types

Knowledge and application of meter measurement

Knowledge and nderstanding of anufacturing guidelines

bility to differentiate methods for heat pump

efrost and initiate defrost for troubleshooting procedures


VOM multimeter

Ammeter

Digital thermometer

KA5.6 Verify proper operation of defrost controls in heat pump systems.

A

um A

d

Ability to use wiring diagrams for troubleshooting and installation

Refrigerant gauges


Number Criteria 5.6.1 Inspect proper operation

of defrost controls in heat pump systems; for example, electronic demand defrost, pressure, time/temperature, time, etc.

5.6.2 Repair and/or replace defrost controls in heat pump systems; for example, electronic demand defrost, pressure, time/temperature, time, etc.

5.6.3 Post-service performance audit of HVACR equipment indicates defrost controls in heat pump system operating at or above manufacturer’s design specifications,


bb

enchmarks and aselines.



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

InformGathering Analyzing Making Organizing Usi

atioand

n and Analyzing

o

and Solvin

Socialskills

orking Leading Building Consensu

Self and


Science

Communi- cations Technology

Informati n Problems Judgments g

Decisions and

and Planning

ng Adaptability W in

Teams Others s Career

Develop-ment

ply heating prin ACR design. 3 3 3 3 3

ectric air, forced air, gas and electric heating systems. 3

KA 5.3 Identify, diagnose, install, maint eplace re and ga main, and r sidential s-fired hydronic heating syste s. 3 4 4 3 3 3 3

Diagnose, maintain, r comp on and resistive heatin systems in the heat pu3 3 3

ctrical circuits for all t s of heat pumps. 3 3 3 3 3

in heat pump systems.3 3 3 3

Statement of Assessment al pres ion, paper/pencil.

appropriate measur nstruments and testing device .

3 3 4 4 4 3 3 3 3 3

3 3 4 4 4 3 3 3 3 3 3 3 3 3

3 4 3 3 3 3 3

3 3 4 4 4 3 3 3 3 3 3 3 3

3 3 4 4 4 3 3 3 3 3 3

3 3 4 4 4 3 3 3 3 3

Strategy: Simulation of work activity, or entatTools: Personal computer, appropriate hand tools, ing i s


KA 5.1 Apply heating principles to HVACR design.

KA 5.2 Identify, diagnose, install, maintain, and replace electric air, forced air, gas and electric heating systems.

KA 5.4 Diagnose, maintain, and repair compression and resistive heating systems in the heat pump.

KA 5.5 Identify, diagnose, maintain, and repair electrical circuits for all types of heat pumps.

KA 5.6 Verify proper operation of defrost controls in heat pump systems.


s oard, JuB ly 13 25

, 2004

rvice, repair heating, ventila iOccupational Skills, Knowledge and

Performance Criteria Occupational Skills and

Specific de mance monstrable perfor


and standards that indicate when the key activity has been performed

successfully.

Criteria Identify and diagnose air conditioning systems (split, packages) as to size and capacity style,

systems taking into account temperature, humidity, heat gain and heat loss of structair movement, etc. Maintain air

psychrometrics Knowledge and applicatioof various

devices. Knowled

proper location of equipment and lines

and circular saws Ability to braze copper tubing Ability to measure tdetermine proper

VOM multimeter Ammeter 2-stage va


Critical Work Function 6 Design, install, maintain, and repair residential and light commercial air conditioning systems

Key Activities Knowledge

Conditions


work function.





Tools, resources and equipment necessary to

carry out key activities and their related performance

criteria.

KA6.1 Identify, diagnose, install, maintain, and repair air conditioning systems.

Number 6.1.1

taking into account temperature, humidity, refrigeration pressures, heat gain and heat loss of structure, refrigerant leaks, air movement, etc.

6.1.2 Install air conditioning

ure,

6.1.3 conditioning systems taking into account temperature, humidity, heat gain and heat loss

Understanding of residential and light commercial air conditioning systems. Understanding of

n measuring

instruments and testing

ge of manufacturers’ installation instructions for

Ability to use reciprocating

emperature difference to

Appropriate hand tools (circular saws) Manifold gauge

cuum pump Micron gauge Digital thermometer Psychrometer Psychrometric chart Air-flow meter Heat loads Duct Calculator

Recognized by the Texas Skill Standard


Criteria

Specific demonstrable performance

Performance Criteria



of structure, air movement, etc. Repair air cosystems taking into account temperature, humidity, heat gain and heat loss of structure, air movement, etc. Post-service performance audit of

temperature across evaporator Ability to use nitrogen, ultrasonic, and electronic leak detectors to find


6.1.4 nditioning

6.1.5

HVACR equipment meets mechanical codes and indicates air conditioning systems operating at or above manufacturer’s design specifications, benchmarks, and baselines.

refrigerant links

Nitrogen, ultrasonic, and electronic leak detectors

KA6.2 Identify, diagnose, install, maintain, and repair air distribution systems, condensate drain systems, and air filtration systems.

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

Appropriate hand tools Air/Acetylene torch rig Ductulator


air distribution systems, condensate drain systems, and air filtration systems.

6.2.2 Install air distribution systems, condensate drain systems, and air filtration systems.

6.2.3 Maintain air distribution systems, condensate drain systems, and air filtration systems.

6.2.4 Repair air distribution systems, condensate drain systems, and air filtration systems.

6.2.5 Post-service performance audit of


HVACR equipment indicates air

ctt ,

.

distribution, condensate drain, and air filtration systems operating at or above

Ability to use temperaturemethod for determining CFM

manufaspecificabenchmabaselines

urer's desiionsrks, and

gn

pressure and velocity pressure

rise



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

Information and

ogy

and Analyzing

and Solving Probl

and

Organizing

Planning

Using Sociaskills

Adaptability Working Leading s

Building Consensu

Self and

Develop-

W iting Reading Mathe-matics

Science

Communi- cations Technol

Information ems Judgments

Decisions and l in Teams

Other s Career r

ment

nd repair air condition ems. 4 3 3

stems, condensate drain syst3 3 4 4 4 3 3 3 3 3 3 3 3 3 3

Statement of Assessment

ing instruments an ting devices, psychrometric ch rts, air/acetylene torch rig, duc

3 3 4 4 4 3 3 3 3 3 3

Strategy: Simulation of work activity, paper/pencil, oral presentation.Tools: Appropriate hand tools, appropriate measur d tes a tulator.


KA 6.1 Identify, diagnose, install, maintain, and repair air conditioning systems.

KA 6.2 Identify, diagnose, install, maintain, and repair air distribution systems, condensate drain systems, and air filtration systems.


Recognized by the Texas Skill Standards Board, July , 2004

Criteria Identify mechrefrigeration systems; for example, walk-in coolers and freezers, reach-in cases, multiple evaporator systems, and packaged refrigeration systems. Install mech

ation ems; for

cases, multiple evaporator systemsand packaged refrigeration systems.

manufacturer’s specifications Knowledge and unders of alternalubricants Understanding of proper procedures for oxbrazing rig to braze in refrigerant lines

2-stage vacuum pump Micron gauge

KA7.1 Identify, install, maintain, and repair mechanical refrigeration systems.

Number7.1.1 anical

7.1.2 anical refriger systexample, walk-in coolers and freezers, reach-in

,

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

tandingtive refrigerants and

y/acetylene

Appropriate hand tools VOM multimeter Ammeter Refrigerant manifold gauges Digital thermometer Electronic leak detector Oxy/acetylene brazing rig

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



Conditions


function.






key activity.



Criteria


7.1.3 Maintain mechanical refrigeration systems; for walk-in coole

example, rs and

ems,

s.

freezers, reach-in cases, multiple evaporator systand packaged refrigeration system

7.1.4 Repair mechanical refrigeration sysfor example,coolers and freach-in c

tems; walk-in reezers, es,

s.

asmultiple evaporator systems, and packaged refrigeration systemPost-service performance audit HVACR equipmindicates mechanical refrigeration system operating at or abmanufacturer's design specifications,

baselines. Knowledge and understanding

of refrigeration defrost ystems s

Ability to initiate defrost to determine if system is in proper operation

Appropria VOM multimeter Ammeter Digital thermometer Manifold gaug

7.1.5 of

ent

ove

benchmarks, and

KA7.2 Identify, install, maintain, and repair electric and hot gas defrost systems in refrigeration systems.

Knowledge and application of meter measurement Knowledge and interpretation

te hand tools

es

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 nd

refrigers

Maintain electric ahot gas defrost systems in

ation ystems. etermineefrost timing

schedules with ustomer

Repair electric and hot-gas defrost ystems in efrigeration ystems. ost-service

performance audit f HVACR equip

and hot gas defrost ystems operation t or above

cturer’s design specifications, benchmarks, and baselines.

of pressure/temperature relationships

ime properly defrost cycles

Use pressure/temperature relationships to t

Number Criteria Knowledge and understanof ice makers

ding

ments evices


VOM multimeter Ammeter Gauge manifold and hoses 2-stage vacuum pump Electronic leak detector Micron gauge Oxy/acetylene brazing rig

Knowledge and application of various measuring instruand testing d Understanding of the proper procedures for oxy/acetylene brazing rig

7.2.4 D proper d

c7.2.5

srs

7.2.6 P

o ment indicates electric

s amanufa

KA7.3 Install, maintain, and repair flake and cube ice makers.

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.


Post-service performance audit of HVACR equipment indicates flake and cube ice maker operation at or above manufacturer's design specifications,

7.3.4


benchmarks, and baselines.

Number Criteria Install water

coolers. Maintain water coolers. Repair water coolers. Post-service performance audit ofHVAindicates water coolers operation at or above manufacturer’s design specifications, benchmarks, and baselines.

Digital thermometer

KA7.4 Install, maintain, and repair water coolers. 7.4.1

7.4.2

7.4.3

7.4.4

CR equipment

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.

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


Identify specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase pressure regulators, etc.

Number

Number Criteria

Install specific refrigeration system components used in commercial refrigeration; for example, low ambient controls, evaporator and crankcase

7.5.1

7.5.2


pressure regulators, etc.

7.5.3 Maintain specific refrigeration system components used in commercial refrigerexamplecoand cran

at ambie

ntrols, okcase

pressure regulators, etc.

ion; for , low evaporat

nt r

7.5.4 Troubleshoot and replace if necessary

rcial

example, low ambient controls, evaporator and rankcas

etc

specific refrigeration system components use in commrefrigeration; for

d e

c e pressure regulators,

. 7.5.5 Post-service

performance audit of HVACindica

s

design specifications, benchmarks, and baselines.

R equipment tes refrigeration

system componentoperation at or above manufacturer's




Occupational Title: HVACR Technician Academic and Employability Knowledge and Skill Matrix CWF 7 Identify, install, maintain, and repair commercial refrigeration systems. Listening Speaking Using






Using Social skills


Leading Others

Building Consensus



Science

KA 7.1 Identify, install, maintain, and repair mechanical refrigeration systems. 3 3 4 4 4 3 3 3 3 3 3 3 3 3 3

KA 7.2 Identify, install, maintain, and repair electric and hot gas defrost systems in refrigeration systems. 3 3 4 4 4 3 3 3 3 3 3 3 3 3 3

KA 7.3 Install, maintain, and repair flake and cube ice makers. 3 3 4 4 4 3 3 3 3 3 3 3 3 3 3

KA 7.4 Install, maintain, and repair water coolers. 3 3 4 4 4 3 3 3 3 3 3 3 3 3 3

KA 7.5 Identify, install, maintain, and repair specific refrigeration system components used in commercial refrigeration. 3 3 4 4 4 3 3 2 3 3 3 3 3 3 3

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

occupational title: hvac - · pdf filetexas skill standards board occupational title: heating,...

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