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Elements and Performance Criteria

1. Prepare to analyse psychrometric performance of HVAC/R system
   • Work health and safety (WHS)/occupational health and safety (OHS) processes and workplace procedures for a given work area are identified and applied
2. WHS/OHS risk control measures and workplace procedures are followed in preparation for HVAC/R work
3. Extent of the psychrometric issues are determined from performance specifications and situation reports and in consultation with relevant person/s
4. HVAC/R activities are planned to meet scheduled timelines in consultation with other person/s involved in the work
5. Strategies are formed to ensure HVAC/R analysis and solution implementation is carried out efficiently in accordance with workplace procedures
6. Analyse psychrometric performance of HVAC/R system
   • WHS/OHS risk control measures and workplace procedures for carrying out HVAC/R work are followed
7. Psychrometric principles are applied to analytical solutions to HVAC/R system
8. Parameters, specifications and performance requirements in relation to HVAC/R system are obtained in accordance with workplace procedures
9. Analysis of HVAC/R psychrometric parameters is carried out to provide effective solutions
10. Unplanned situations are responded to in accordance with regulatory requirements and workplace procedures in a manner that minimises risk to personnel and equipment
11. Quality of work is monitored against performance agreement and/or workplace procedures and industry standards
12. Document and report results of the HVAC/R psychrometric performance analysis and actions taken
    • Solution/s to HVAC/R psychrometric issues are evaluated to determine their effectiveness and modified, as required
13. HVAC/R analysis is documented and includes details of findings, calculations and assumptions
14. HVAC/R analysis is reported to appropriate person/s to determine appropriate action to be taken based on findings
15. Justification for findings and any actions to be undertaken in relation to the HVAC/R equipment is documented for inclusion in work/project or development records in accordance with industry standards and 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.
analysing psychrometric parameters of HVAC/R systems must include at least the following:	two different refrigeration and air conditioning systems

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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 one occasion and include:

understanding the psychrometric performance issues forming effective strategies for analysing refrigeration and air conditioning systems performance obtaining psychrometric performance parameters, specifications and performance requirements appropriate to each situation evaluating the results of the analysis documenting analysis details of all findings, calculations and assumptions documenting justification of actions to be implemented in accordance with professional standards dealing with unplanned events applying problem-solving techniques applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices, including using risk control measures applying sustainable energy principles and practices.

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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:

heating, ventilation and air conditioning/refrigeration (HVAC/R) psychometrics, safe working practices and relevant standards, codes and regulations, including: fundamentals and terms: sensible heat factor (conditioned space and grand total) quantity of air effective surface temperature bypass factor coil characteristics: processes sensible cooling cooling and dehumidification sensible heating spray processes: saturation efficiency processes adiabatic/evaporative cooling cooling and humidification sensible cooling chemical dehumidification process: dehumidification and heating cooling tower characteristics: humidification and cooling indirect evaporative cooling process system analysis: partial load reheat control bypass control volume control dump back systems low velocity coils psychrometric formulae and charts: properties of air gas constants derivation of air constants combined gas laws Dalton’s law of partial pressures carrier’s equation psychrometric property tables air mixing equations air quantity equations problem-solving techniques psychrometric physical and thermodynamic properties of gas-vapor mixtures, including psychrometric principles relevant job safety assessments or risk mitigation processes relevant WHS/OHS legislated requirements relevant workplace documentation typical psychrometric performance issues.

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