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 operation of HVAC air and hydronic systems

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

KSEJA HVAC air systems

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

T Air distribution principles

air diffuser selection

factors affecting the design of ductwork systems

types of ductwork systems

static velocity and total pressure

laminar and turbulent flow

moody diagram

parameters that control cost

T Pressure loss

friction and dynamic

Colebook White formula

in ducts friction charts

in fittings loss coefficient

fitting selection criteria

diffuser pressure loss

T System sizing

velocity method

equal friction method

static regain method

balanced pressure drop method

circular to rectangular equivalent

standard duct sizes and gauges

balancing

T Heat and leakage losses

heat gainloss calculation

bare vs insulated

leakage

T Overview of noise in duct systems

noise sources in duct systems

attenuation

impact on design

methods of control

T Fans

types and characteristics

fan laws

system effect

fan selection

fan and system curves

T Air systems

dual and single duct constant volume

variable volume

induction units

multizone

diversity factors

KSEJA HVAC systems

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

T Systems operation

closedopen systems

pump headlift static head high rise building

system friction losses

nett positive suction head

system curves

T Pumps

types

selection criteria

performance characteristics

bladder tanks

coil characteristics

heat exchangers plate shell and tube tube in tube

flow measurements types

flow switchers

builders types and performance characteristics

cooling towers elementary cooling thermodynamics and types

T Valves flow control devices

types and applications

throttling characteristics

flow measurements

selection and applications

T Piping systems

balancing and commissioning

air venting

water treatment

vacuum breaking and air breaks

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 operation of HVACR systems as described in and including

A

Understanding the operating performance

B

Forming effective strategies for analysing air conditioning systems performance

C

Obtaining operating 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 operation 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