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Evidence Guide: AURETU005 - Retrofit and modify air conditioning and HVAC systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

AURETU005 - Retrofit and modify air conditioning and HVAC systems

What evidence can you provide to prove your understanding of each of the following citeria?

Prepare to retrofit system

  1. Job requirements are determined from workplace instructions
  2. Retrofit information, manufacturer specifications, and relevant code of practice are accessed and interpreted
  3. Type of refrigerant is determined according to workplace procedures and safety and environmental requirements
  4. Retrofit options are analysed and those most appropriate to the circumstances are selected
  5. Hazards associated with the work are identified and risks are managed
  6. Retrofit tools and equipment are selected and checked for serviceability
Job requirements are determined from workplace instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit information, manufacturer specifications, and relevant code of practice are accessed and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Type of refrigerant is determined according to workplace procedures and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit options are analysed and those most appropriate to the circumstances are selected

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Hazards associated with the work are identified and risks are managed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

De-gas system

  1. System de-gas procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system
  2. Refrigerant is recovered into appropriate refrigerant recovery cylinder for the refrigerant type
  3. Oil recovered is measured to determine replacement volume
  4. System is evacuated according to manufacturer specifications, workplace procedures, and safety and environmental requirements
System de-gas procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigerant is recovered into appropriate refrigerant recovery cylinder for the refrigerant type

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Oil recovered is measured to determine replacement volume

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is evacuated according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit system

  1. Technical information relating to vehicle or machinery being retrofitted is accessed and interpreted
  2. Air conditioning retrofit modification procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  3. System is pressure tested for leaks before being re-gassed according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  4. System is re-gassed with appropriate refrigerant gas and lubricating oil according to manufacturer specifications and workplace procedures
  5. Post-modification testing is carried out according to workplace procedures and test results are checked to confirm system performance is operating to manufacturer specifications, reported pre-modification issue has been resolved, and no other faults are present
Technical information relating to vehicle or machinery being retrofitted is accessed and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Air conditioning retrofit modification procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is pressure tested for leaks before being re-gassed according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is re-gassed with appropriate refrigerant gas and lubricating oil according to manufacturer specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Post-modification testing is carried out according to workplace procedures and test results are checked to confirm system performance is operating to manufacturer specifications, reported pre-modification issue has been resolved, and no other faults are present

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete work processes

  1. Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use
  2. Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
  3. Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures
  4. Australian Refrigeration Council accredited (ARCtick)service decal sticker and other required workplace documentation are completed and processed according to workplace procedures
Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Australian Refrigeration Council accredited (ARCtick)service decal sticker and other required workplace documentation are completed and processed according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Prepare to retrofit system

  1. Job requirements are determined from workplace instructions
  2. Retrofit information, manufacturer specifications, and relevant code of practice are accessed and interpreted
  3. Type of refrigerant is determined according to workplace procedures and safety and environmental requirements
  4. Retrofit options are analysed and those most appropriate to the circumstances are selected
  5. Hazards associated with the work are identified and risks are managed
  6. Retrofit tools and equipment are selected and checked for serviceability
Job requirements are determined from workplace instructions

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit information, manufacturer specifications, and relevant code of practice are accessed and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Type of refrigerant is determined according to workplace procedures and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit options are analysed and those most appropriate to the circumstances are selected

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Hazards associated with the work are identified and risks are managed

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit tools and equipment are selected and checked for serviceability

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

De-gas system

  1. System de-gas procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system
  2. Refrigerant is recovered into appropriate refrigerant recovery cylinder for the refrigerant type
  3. Oil recovered is measured to determine replacement volume
  4. System is evacuated according to manufacturer specifications, workplace procedures, and safety and environmental requirements
System de-gas procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Refrigerant is recovered into appropriate refrigerant recovery cylinder for the refrigerant type

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Oil recovered is measured to determine replacement volume

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is evacuated according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Retrofit system

  1. Technical information relating to vehicle or machinery being retrofitted is accessed and interpreted
  2. Air conditioning retrofit modification procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  3. System is pressure tested for leaks before being re-gassed according to manufacturer specifications, workplace procedures, and safety and environmental requirements
  4. System is re-gassed with appropriate refrigerant gas and lubricating oil according to manufacturer specifications and workplace procedures
  5. Post-modification testing is carried out according to workplace procedures and test results are checked to confirm system performance is operating to manufacturer specifications, reported pre-modification issue has been resolved, and no other faults are present
Technical information relating to vehicle or machinery being retrofitted is accessed and interpreted

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Air conditioning retrofit modification procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is pressure tested for leaks before being re-gassed according to manufacturer specifications, workplace procedures, and safety and environmental requirements

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

System is re-gassed with appropriate refrigerant gas and lubricating oil according to manufacturer specifications and workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Post-modification testing is carried out according to workplace procedures and test results are checked to confirm system performance is operating to manufacturer specifications, reported pre-modification issue has been resolved, and no other faults are present

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete work processes

  1. Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use
  2. Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected
  3. Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures
  4. Australian Refrigeration Council accredited (ARCtick)service decal sticker and other required workplace documentation are completed and processed according to workplace procedures
Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Australian Refrigeration Council accredited (ARCtick)service decal sticker and other required workplace documentation are completed and processed according to workplace procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements

Elements describe the essential outcomes.

Performance Criteria

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to retrofit system

1.1 Job requirements are determined from workplace instructions

1.2 Retrofit information, manufacturer specifications, and relevant code of practice are accessed and interpreted

1.3 Type of refrigerant is determined according to workplace procedures and safety and environmental requirements

1.4 Retrofit options are analysed and those most appropriate to the circumstances are selected

1.5 Hazards associated with the work are identified and risks are managed

1.6 Retrofit tools and equipment are selected and checked for serviceability

2. De-gas system

2.1 System de-gas procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system

2.2 Refrigerant is recovered into appropriate refrigerant recovery cylinder for the refrigerant type

2.3 Oil recovered is measured to determine replacement volume

2.4 System is evacuated according to manufacturer specifications, workplace procedures, and safety and environmental requirements

3. Retrofit system

3.1 Technical information relating to vehicle or machinery being retrofitted is accessed and interpreted

3.2 Air conditioning retrofit modification procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements

3.3 System is pressure tested for leaks before being re-gassed according to manufacturer specifications, workplace procedures, and safety and environmental requirements

3.4 System is re-gassed with appropriate refrigerant gas and lubricating oil according to manufacturer specifications and workplace procedures

3.5 Post-modification testing is carried out according to workplace procedures and test results are checked to confirm system performance is operating to manufacturer specifications, reported pre-modification issue has been resolved, and no other faults are present

4. Complete work processes

4.1 Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

4.3 Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

4.4 Australian Refrigeration Council accredited (ARCtick)service decal sticker and other required workplace documentation are completed and processed according to workplace procedures

Required Skills and Knowledge

Elements

Elements describe the essential outcomes.

Performance Criteria

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to retrofit system

1.1 Job requirements are determined from workplace instructions

1.2 Retrofit information, manufacturer specifications, and relevant code of practice are accessed and interpreted

1.3 Type of refrigerant is determined according to workplace procedures and safety and environmental requirements

1.4 Retrofit options are analysed and those most appropriate to the circumstances are selected

1.5 Hazards associated with the work are identified and risks are managed

1.6 Retrofit tools and equipment are selected and checked for serviceability

2. De-gas system

2.1 System de-gas procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or system

2.2 Refrigerant is recovered into appropriate refrigerant recovery cylinder for the refrigerant type

2.3 Oil recovered is measured to determine replacement volume

2.4 System is evacuated according to manufacturer specifications, workplace procedures, and safety and environmental requirements

3. Retrofit system

3.1 Technical information relating to vehicle or machinery being retrofitted is accessed and interpreted

3.2 Air conditioning retrofit modification procedures are carried out according to manufacturer specifications, workplace procedures, and safety and environmental requirements

3.3 System is pressure tested for leaks before being re-gassed according to manufacturer specifications, workplace procedures, and safety and environmental requirements

3.4 System is re-gassed with appropriate refrigerant gas and lubricating oil according to manufacturer specifications and workplace procedures

3.5 Post-modification testing is carried out according to workplace procedures and test results are checked to confirm system performance is operating to manufacturer specifications, reported pre-modification issue has been resolved, and no other faults are present

4. Complete work processes

4.1 Final inspection is made to ensure work is to workplace expectations and the vehicle or machinery is presented ready for use

4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

4.3 Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

4.4 Australian Refrigeration Council accredited (ARCtick)service decal sticker and other required workplace documentation are completed and processed according to workplace procedures

Before competency can be determined, individuals must demonstrate they can perform the following according to the standard defined in the unit’s elements, performance criteria, range of conditions and foundation skills:

retrofit and modify the air conditioning and HVAC systems of two different vehicles or machinery, in which the work must include changing the type of refrigerant.

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to retrofitting and modifying air conditioning and HVAC systems, including procedures for:

working with refrigerants at boiling point given risk of frostbite

working with system lubricants, including carcinogenic oils

identifying and handling flammable refrigerants, including hydrocarbon (HC) refrigerants

selecting and using personal protective equipment (PPE)

identifying firefighting equipment

environmental requirements, including procedures for:

preventing loss of refrigerant to the atmosphere

handling materials and refrigerant recovery equipment

key requirements of Australian automotive code of practice: Control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners

application, purpose and operation of air conditioning and HVAC systems and components, including:

high pressure and low pressure sides of air conditioning systems

compressors, including:

piston, scroll and rotary vane compressors

electric compressors

variable displacement compressors

clutchless compressors electromagnetic clutches

condensers

receiver-dryers, including filters and desiccants

expansion valves, including capillary tubes

evaporators

thermostats

refrigerants, including R12, R134a, R1234yf, R290 and R600a blends

compressor oils

air conditioner and heating controls, including levers and ducting

air conditioner and heating electrical circuits and sensors, including:

high and low pressure switches

pressure relief valves

temperature sensors

climate control systems

procedures for retrofitting and modifying air conditioning and HVAC systems, including:

determining original system fitted to vehicle, including refrigerant and oil type and types of components

determining appropriate retrofit and modification options, including:

determining required system performance output

component replacement, including O rings and seals

refrigerant and oil selection

procedures for removing and replacing system components

procedures for changing system refrigerant, including:

changing refrigerant gas from R12 to R134a:

receiver dryer filter replacement

change system fittings for manifold gauge attachment

change oil type

changing refrigerant gas from R134a to R1234yf:

change refrigerant recharging ports

change system fittings for manifold gauge attachment

changing refrigerant gas from R134a to blends of R290 and R600a:

change refrigerant re-charging ports

change system fittings for manifold gauge attachment

procedures for recovering automotive refrigerant, including:

testing refrigerant to determine its type

connecting manifold and gauge set and recovery unit, including types and location of service ports

identifying recovery cylinder appropriate to the refrigerant

operating recovery unit, including weighing recovery cylinder before after recovery

disconnecting and storing recovery unit and cylinder

procedures for re-gassing air conditioning and HVAC systems, including:

testing system for leaks using vacuum and pressure testing

using manifold gauges to charge system

post-retrofit testing procedures for air conditioning and HVAC systems, including procedures for checking for:

refrigerant leaks

heater core and system water coolant leaks

static and dynamic performance tests of air conditioning and HVAC systems, including checking:

ambient temperature

vent temperature

condenser and suction line temperature

procedures for completing workplace documentation, including ARCtick service decal sticker.

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Code of practice must include:

Australian automotive code of practice: Control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners.

Safety and environmental requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for:

working with refrigerants at boiling point given risk of frostbite

working with system lubricants, including carcinogenic oils

identifying flammable refrigerants, including hydrocarbon (HC) refrigerants

selecting and using personal protective equipment (PPE)

identifying firefighting equipment

environmental requirements, including procedures for:

preventing loss of refrigerant to the atmosphere

handling materials and refrigerant recovery equipment.

Australian Refrigeration Council accredited (ARCtick) service decal sticker information must include:

name of the service organisation

ARCtick business authority number

quantity of refrigerant added

refrigerant and oil type

service date

technician name and licence number.