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 determining the basic operating conditions of air conditioning systems

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

KSEJA Basic air conditioning operating conditions

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

T The Air Conditioning Industry

Industry classifications Domestic Commercial Industrial and Transport

Applications shopping centres housing offices and typical equipment used in each classification split systems central plant chemical production etc

Types of systems commonly used such as selfcontained units RACs split systems ducted systems package units and central plant systems

T Working safely with air conditioning systems

Risk management principles and processes

Hazards and risk control measures associated with

air conditioning systems and components

measuring and testing equipment

T Temperature amp relative humidity measuring devices

Thermometer types and applications digital stem dial maxmin noncontact data loggers

Relative Humidity measurement devices and applications dry bulbwet bulb sling digital

Hazards and related safe working practices working near rotating machinery fans pulleys belts etc

Care and maintenance bending stems overheating removing batteries after use uncoiling capillary line

Calibration boiling water iced water send to a specialist etc

Typical locations where values are commonly obtained temp RH

Obtaining temperature and relative humidity readings

Recording temperature and relative humidity readings using DBWB method andor electronic

T Air velocity measuring devices Anemometers only

Anemometer types digital vane hot wire

Typical applications for each

Air speed velocity and its units of measurement

Air flow rate volume flow rate and its units of measurement

Methods for setting up and using anemometers hood patch sweep

Hazards amp safe working practices working near rotating machinery fans pulleys belts working at height

Care and maintenance maintaining vane balance bent blades removing batteries after use etc

Calibration requirements by specialists

Typical locations where air velocity measurements values are commonly obtained grilles and outlets etc

Obtaining and recording air velocity readings using the patch method andor sweep method

Calculating volume flow rate from an outletgrille

T Psychrometrics

Composition of air

Psychrometric chart

Terms used in the study of air and their units of measurement DB WB RH dew point enthalpy moisture content

Sensible heat latent heat and total heat

Sensible heat ratio

Plotting basic points on a chart supply air return air

Reading additional information dew point moisture content RH specific heat capacity enthalpy

Values relevant to a plotted process and plotting a simple process on a psychrometric chart

T Basic air conditioning processes

Factors effecting human comfort temp RH air velocity noise cleanliness fresh air

Industry recognised human comfort conditions

The comfort zone

Basic processes used to obtain comfort conditions sensible cooling dehumidifying humidifying etc

T Ventilation

Basic needs for ventilation removal of stale air removal of toxic gases eg car parks welding bays etc

Methods used to ventilate an area natural supply exhaust

Typical applications for ventilation systems car parks kitchens toilets etc

T Regulations

Covering ventilation AS parts amp

Common council requirementsregulations no DA required noise levels not exceeding dBA above background fresh air in residential situations etc

Fresh air requirements for typical situations calculate using floor area method and air change method

T Heat loads

Sources of sensible heat in an air conditioned space

Sources of latent heat in an air conditioned space

Changes in sensiblelatent ratios and their effect on operating system capacity

Industry check figures

Basic room heat load calculation using check figures

Basic RACsplit system unit selection

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

Determine the basic operating conditions of air conditioning systems as described in and including

A

Selecting and using appropriate measuring devices correctly

B

Interpreting measurements

C

Using calculation methods accurately

D

Identifying parameters not within the specified range

E

Documenting operating conditions correctly

F

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

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 determining the basic operating conditions of air conditioning 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

Concurrent assessment and relationship with other units

There are no concurrent assessment recommendations for this unit