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Elements and Performance Criteria

1. Prepare to service and repair flammable refrigerants refrigeration and air conditioning systems
   • WHS/OHS hazards, risk control methods, relevant standards, codes and legislation are obtained and applied
2. Hazards not previously identified are reported and advice on risk control measures sought from supervisor
3. Details of the work are obtained from documentation and/or from supervisor to determine the scope of work to be completed
4. Advice is sought from supervisor, as required, to ensure work is coordinated effectively with others
5. Materials required for the work are identified and obtained in accordance with workplace procedures
6. Tools, equipment and testing devices required for the work are obtained and checked for correct operation and safety in accordance with workplace procedures
7. Repair and service flammable refrigerants refrigeration and air conditioning systems
   • Measuring system operating parameters are conducted in accordance with WHS/OHS requirements and workplace safety procedures
8. Checks are conducted to ensure system/component parts are isolated, as required, in accordance with workplace procedures and WHS/OHS requirements
9. Refrigerant is removed from system safely in accordance with relevant legislation, standards and code requirements, manufacturer instructionsand workplace procedures
10. Pressure testing is conducted and precautions taken to prevent damage to components in accordance with workplace procedures and WHS/OHS requirements
11. Pressure testing is conducted at a pressure compatible with flammable refrigerants in accordance with industry standards and WHS/OHS requirements
12. System leaks are located and rectified using testing methods appropriate to the system in accordance with industry standards and workplace procedures
13. System is evacuated for an operational flammable refrigerant system in accordance with relevant industry standards and workplace procedures
14. System is charged safely with flammable refrigerants and compatible lubricants in accordance with relevant legislation, standards and code requirements, manufacturer instructionsand workplace procedures
15. Actual and specified range of operating conditions are determined from measured and calculated values as they apply to flammable refrigerants vapour compression systems in accordance with workplace procedures and industry standards
16. Methods for dealing unplanned situations are discussed, as required, with relevant person/s for approval and documented in accordance with workplace procedures
17. Operating conditions are determined without damage to apparatus, circuits, the surrounding environment and/ or services using sustainable energy practices
18. Complete and report servicing and repairing flammable refrigerants refrigeration and air conditioning systems
    • Worksite is cleaned and made safe in accordance with workplace procedures
19. Contaminated refrigerant and lubricant are dealt with in accordance with legislative/regulatory and industry standards and requirements
20. Operation conditions are documented and include identification of any parameter that is not within the specified range for the system
21. Work supervisor is notified of work completion in accordance with workplace procedures

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Servicing and repairing self-contained A2, A2L and A3 flammable refrigerant air conditioning and refrigeration systems must include at least the following:

determining operating conditions using measurement and basic calculation methods, including suction and discharge pressures; ambient, evaporator and condensing temperatures; and evaporator and condenser temperature differences recovering refrigerant, replacing components, testing pressure, evacuating, charging and leak testing a flammable refrigerant system in a safe and environmentally responsible manner one self-contained flammable refrigerant air conditioning or refrigeration system

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including using risk control measures charging the system with the appropriate type and quantity of flammable refrigerants completing documentation completing work and reporting on servicing and repairing flammable refrigerants refrigeration and air conditioning systems conducting pressure testing at the appropriate pressure level and without damaging components dealing with unplanned events evacuating the system to the required standard and using appropriate vacuum measuring instruments locating and rectifying leaks obtaining and recording measurements preparing to service and repair flammable refrigerants refrigeration and air conditioning systems removing and storing refrigerant correctly selecting appropriate materials and equipment servicing and repairing flammable refrigerants refrigeration and air conditioning systems.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

charging requirements and procedures compressor lubricant types, applications and safe handling evacuation requirements and procedures flammable refrigerant (A2, A2L and A3) types, applications, dangers, safe handling, storage and transport flammable refrigerant refrigeration and air conditioning systems, components and operating conditions leak detection requirements and procedures pressure testing requirements and procedures refrigerant removal/recovery and flushing requirements and procedures relevant job safety assessments or risk mitigation processes relevant legislation, industry standards and codes of practice, including hazards associated with flammable refrigerants relevant manufacturer specifications relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures system access tools and procedures tube joining tools and procedures.

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