Elements and Performance Criteria
- Prepare to service self-contained CO² refrigeration and heat pump system
- Safety hazards not previously identified are reported, risk assessed and advice on risk control measures sought from work supervisor
- Nature of work is obtained from documentation or from work supervisor to determine the scope of work to be undertaken
- Advice is sought from work supervisor to ensure the work is coordinated effectively with others
- Sources of materials required for the refrigeration work are accessed in accordance with workplace and procedures
- Tools, equipment and testing devices needed to carry out refrigeration work are obtained and checked for correct operation and safety
- Service and repair self-contained CO² refrigeration and heat pump system
- Refrigeration inspection and checks are carried out to ensure the system or component parts are isolated in accordance with WHS/OHS requirements and workplace procedures
- Refrigerant is removed from system safely in accordance with regulatory requirements, industry standards and practices
- Precautions are taken to prevent damage to components while pressure testing the refrigeration and heat pump system
- Pressure testing is conducted at a pressure compatible with CO² and in accordance with industry standards and practices
- Refrigerant leaks are located and rectified using testing methods appropriate to the system and in accordance with industry standards and practices
- Refrigeration and heat pump system is evacuated to the required level and cleaned of all moisture and other contaminants in accordance with industry standards and practices
- Refrigeration and heat pump system is charged safely with refrigerant grade CO² and compatible lubricants in accordance with industry standards and practices
- Actual and specified range of operating conditions are determined from measured and calculated values as they apply to CO² vapour compression systems in accordance with workplace procedures and industry standards
- Unplanned situations are dealt with safely and in accordance with workplace procedures and approval of authorised person/s in a manner that minimises risk to personnel and equipment
- Operating conditions are determined without damage to apparatus, circuits, the surrounding environment or services using sustainable energy practices
- Complete and report servicing and repair of self-contained CO² refrigeration and heat pump system work activities
- Contaminated refrigerant and lubricant are dealt with in accordance with legislative/regulatory and industry standard requirements
- Operation conditions are documented and include identification of any parameter that is not within the specified range for the system
- Work supervisor is notified of the completion of work in accordance with workplace procedures