Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Prepare to operate ammonia refrigerant plant
   • WHS/OHS hazards, risk control methods, relevant standards, codes and legislation are obtained and applied
2. Ammonia refrigerant, refrigeration system and components on which the work is to be carried out are identified
3. WHS/OHS risk control measures, safety data sheets (SDS)/material safety data sheets (MSDS) and workplace procedures are followed in preparation for refrigeration work
4. Safety hazards not previously identified are reported and advice on risk control measures is sought from work supervisor
5. Nature of work is obtained from documentation or work supervisor to determine the scope of work to be undertaken
6. Advice is sought from work supervisor to ensure the work is coordinated effectively with others
7. Sources of materials required for refrigeration work are accessed in accordance with workplace procedures
8. Tools, equipment and testing devices needed to carry out refrigeration work are obtained and checked for correct operation and safety
9. Refrigeration system operating conditions are established from service documentation, supervisor and the application of refrigeration fundamentals
10. Operate ammonia refrigeration plant
    • Refrigeration plant is started up in accordance with workplace procedures, industry standards, codes of practice and regulations
11. Measurement of refrigeration system operating parameters is conducted in accordance with WHS/OHS requirements and workplace safety procedures
12. Supervisor or person in charge is advised of system and components performing outside their operating parameters to facilitate remedial action
13. Refrigeration plant remedial action is determined and implemented, as required, in accordance with workplace procedures
14. Refrigeration service procedures are completed in accordance with workplace procedures
15. Daily processing requirements are calculated to predict demand on refrigeration plant
16. Oral and written information on the performance of the refrigeration plant is exchanged formally and informally between the operator and supervisor/production team
17. Equipment controls are adjusted to prepare refrigeration plant to meet the load
18. Action is taken in a proactive way to maintain the performance of the plant
19. Demands on plant consumables are calculated to facilitate the ordering of replacements
20. Strategies are developed to meet demand in the event of refrigeration plant equipment malfunction or breakdown
21. Complete work and report on ammonia refrigeration plant operations
    • Worksite is cleaned and made safe in accordance with workplace procedures
22. Refrigeration plant performance records are maintained and distributed 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.
Operating ammonia refrigeration system conditions must include at least the following:	starting up determining operating conditions using measurement and calculation methods repairing components shutting down the system checking: suction inter-stage and discharge pressures ambient, evaporator, inter-stage and condensing temperatures evaporator and condenser temperature differences

---

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 legislative, industry standards and practices applying relevant work health and safety (WHS)/occupational health and safety (WHS/OHS) requirements and workplace procedures and practices, including using risk control measures applying sustainable energy principles and practices completing necessary service documentation conducting servicing procedures in accordance with the schedule dealing with unplanned events/situations in accordance with workplace procedures in a manner that minimises risk to personnel and equipment determining plant operating condition, rectifying faults and defective components in accordance within workplace procedures and guidelines documenting operating conditions correctly identifying anhydrous ammonia (R717) refrigerant safety data sheets (SDS)/material safety data sheets (MSDS) and workplace emergency response procedures identifying the conditions of the refrigerant at various locations in the vapour compression and liquid recirculation system operating an industrial refrigeration plant using ammonia as the refrigerant recording measurements selecting and using appropriate measuring devices correctly shutting down ammonia refrigerant plant starting up ammonia refrigerant plant taking remedial action within workplace emergency response procedures and job role using calculation methods accurately.

---

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:

adding refrigerant, draining/adding oil and purging non-condensables ammonia refrigeration system operation hazardous goods, segregation, storage and handling refrigeration plant start-up, shutdown and emergency procedures refrigeration systems, including: ammonia refrigeration system types, operating principles, major components, flow controls and ancillary components operating conditions of ammonia refrigeration systems refrigeration vapour compression system principles, including: heat, heat energy (definition and unit of measurement), enthalpy (definition and unit of measurement) and heat transfer pressure, scale types (imperial, metric and absolute) and their units of measurement, vacuum scales (Pascals and microns), and conversion to/from absolute values and gas laws (Boyles, Charles and Daltons) refrigerant conditions, saturation temperature, saturated liquid saturated vapour, superheated vapour, sub-cooled liquid and pressure temperature relationships sensible and latent heat, definition of latent heat and sensible heat (including units of measurement) and measurement devices temperature and relative humidity, scale types (imperial, metric and absolute) and units of measurement and measurement devices vapour compression cycle, primary system components, and high and low pressure sides relevant job safety assessments or risk mitigation processes, including ammonia (R717) refrigerant SDS/MSDS relevant manufacturer specifications relevant WHS/OHS legislated requirements relevant workplace documentation relevant workplace policies and procedures, including workplace emergency response plan vapour compression system, including operation and major components.

---