This describes the essential skills and knowledge and their level required for this unit

Evidence shall show that knowledge has been acquired of safe working practices and analysing the thermodynamic performance of HVACR systems

All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies

KSEJA Refrigeration systems

Evidence shall show an understanding of introduction to refrigeration systems applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Major components type and functions

evaporators

compressors

expansion devices

ancillary components

refrigerants

T System operation and performance

thermodynamic properties of refrigerants

pressure enthalpy charts

refrigerant cycle

refrigerant cycle represented on pH charts

introduction to refrigerating effect heat of compression heat rejected on high side coefficient of performance liquid subcooling suction superheating

effects on performance of changing operating pressures liquid subcooling suction superheating

T Application of refrigeration

introduction to industrial refrigeration specific system component types and refrigerants applied

scope of commercial refrigeration specific system component types and refrigerants applied

T Refrigerated enclosures and cabinets

merchandising and display cabinets

deep freeze meat

dairy

fruit and vegetable

multideck display

single deck

well type

island cases

glass door

reach door

reach in merchandisers

defrosting methods

cold rooms and freezer rooms

types and construction

insulation

vapour barrier

frost heave

interior fittings

location of equipment

defrosting methods

cold tracking

trace heating

storage conditions

temperature

relative humidity

air velocity

air patterns

load limits

KSEJA Air conditioning systems

Evidence shall show an understanding of introduction to air conditioning systems applying safe working practices and relevant Standards Codes and Regulations to an extent indicated by the following aspects

T Occupational health requirements

WHampS requirements

BCA requirements

AS parts amp

AS

noise and vibration

air quality

sick building syndrome

T Operating requirements

ventilation

air distribution

terminal velocity

temperature

relative humidity

air quality

noise

basic psychrometrics

T Operating modes

ventilation

evaporative cooling

ventilation and cooling

ventilation and heating

dehumidification

dehumidification

dehumidification and reheat

humidification

T Operating terminologycharacteristics

throw drop

primary and secondary air

coanda effect

T HVAC system components and functions

fans

ducting

registers

dampers

filters

cooling coils

heating coils

induction units

fan coil units

terminal units

humidifiers pumps and sprayers

hydronic systems and components

T Applications and construction of air conditioning systems

applications

residential commercial low and high rise industrial ventilation and air conditioning

packaged plant

RACs split systems wall and floor console ceiling fan coil wall facia roof top reverse cycle option central station plant

all air systems constant volume variable temperature constant temperature variable volume airwater systems

all water system multizoning thermal storage systems

basic air conditioning system diagrams

duct layout

hydronic layout

unitconditioner drawings

T HVAC control systems

basic principles

terminology

symbols and diagrams

basic applications

The evidence guide provides advice on assessment and must be read in conjunction with the Performance Criteria Required Skills and Knowledge the Range Statement and the Assessment Guidelines for this Training Package

The Evidence Guide forms an integral part of this Unit It must be used in conjunction with all parts of this unit and performed in accordance with the Assessment Guidelines of this Training Package

Overview of Assessment

Longitudinal competency development approaches to assessment such as Profiling require data to be reliably gathered in a form that can be consistently interpreted over time This approach is best utilised in Apprenticeship programs and reduces assessment intervention It is the industrypreferred model for apprenticeships However where summative or final assessment is used it is to include the application of the competency in the normal work environment or at a minimum the application of the competency in a realistically simulated work environment In some circumstances assessment in part or full can occur outside the workplace However it must be in accordance with industry and regulatory policy

Methods chosen for a particular assessment will be influenced by various factors These include the extent of the assessment the most effective locations for the assessment activities to take place access to physical resources additional safety measures that may be required and the critical nature of the competencies being assessed

The critical safety nature of working with electricity electrical equipment gas or any other hazardous substancematerial carries risk in deeming a person competent Sources of evidence need to be rich in nature to minimise error in judgment

Activities associated with normal everyday work influence decisions about howhow much the data gathered will contribute to its richness Some skills are more critical to safety and operational requirements while the same skills may be more or less frequently practised These points are raised for the assessors to consider when choosing an assessment method and developing assessment instruments Sample assessment instruments are included for Assessors in the Assessment Guidelines of this Training Package

Critical aspects of evidence required to demonstrate competency in this unit

Before the critical aspects of evidence are considered all prerequisites must be met

Evidence for competence in this unit shall be considered holistically Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the Assessment Guidelines UEE Evidence shall also comprise

Evidence for competence in this unit shall be considered holistically. Each Element and associated performance criteria shall be demonstrated on at least two occasions in accordance with the 'Assessment Guidelines - UEE07 '. Evidence shall also comprise:

A representative body of work performance demonstrated within the timeframes typically expected of the discipline work function and industrial environment In particular this shall incorporate evidence that shows a candidate is able to

Implement Occupational Health and Safety workplace procedures and practices including the use of risk control measures as specified in the performance criteria and range statement

Apply sustainable energy principles and practices as specified in the performance criteria and range statement

Demonstrate an understanding of the essential knowledge and associated skills as described in this unit It may be required by some jurisdictions that RTOs provide a percentile graded result for the purpose of regulatory or licensing requirements

Demonstrate an appropriate level of skills enabling employment

Conduct work observing the relevant Anti Discrimination legislation regulations polices and workplace procedures

Demonstrated consistent performance across a representative range of contexts from the prescribed items below

Analyse the thermodynamic performance of HVACR systems as described in and including

A

Understanding the thermodynamic performance issues

B

Forming effective strategies for analysing refrigeration and air conditioning systems performance

C

Obtaining thermodynamic performance parameters specifications and performance requirements appropriate to each situation

D

Evaluating the results of the analysis

E

Documenting analysis details of all findings calculations and assumptions

F

Documenting justification of actions to be implemented in accordance with professional standards

G

Dealing with unplanned events by drawing on essential knowledge and skills to provide appropriate solutions incorporated in the holistic assessment with the above listed items

Note Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Note:
Successful completion of relevant vendor training may be used to contribute to evidence on which competency is deemed. In these cases the alignment of outcomes of vendor training with performance criteria and critical aspects of evidence shall be clearly identified

Context of and specific resources for assessment

This unit should be assessed as it relates to normal work practice using procedures information and resources typical of a workplace This should include

OHS policy and work procedures and instructions

Suitable work environment facilities equipment and materials to undertake actual work as prescribed by this unit

These should be part of the formal learningassessment environment

Note

Where simulation is considered a suitable strategy for assessment conditions must be authentic and as far as possible reproduce and replicate the workplace and be consistent with the approved industry simulation policy

Evidence should show demonstrated competency in analysing the psychrometric and thermodynamic performance of HVACR systems

Method of assessment

This unit shall be assessed by methods given in Volume Part Assessment Guidelines

Note Competent performance with inherent safe working practices is expected in the Industry to which this unit applies This requires assessment in a structured environment which is intended primarily for learningassessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit

Note:
Competent performance with inherent safe working practices is expected in the Industry to which this unit applies. This requires assessment in a structured environment which is intended primarily for learning/assessment and incorporates all necessary equipment and facilities for learners to develop and demonstrate the essential knowledge and skills described in this unit.

Concurrent assessment and relationship with other units

There are no concurrent assessment recommendations for this unit