Modification History
Not Applicable
Unit Descriptor
Unit Descriptor |
1 ) 1 .1 ) Descriptor |
This unit covers specialised procedures for operating an industrial refrigeration plant using ammonia as the refrigerant. It encompasses applying specialised knowledge of refrigeration principles that apply to ammonia, specifying the normal operating parameters for the plant, rectifying faults and defective components within organisational guidelines and completing the necessary service documentation. |
Application of the Unit
Application of the Unit |
4 ) This competency standard is suitable for refrigeration plant operators who need to be aware of the potential hazards associated with ammonia and the appropriate course of action that should be taken in an emergency. Currently delivered as a stand alone unit of competency and is open to any person whose work requires them to operate ammonia refrigeration plant. Delivery and assessment of this unit should be undertaken within regard to the requirements of License to Practice (1.2 above), Prerequisite Competencies and Literacy and Numeracy skills (2 above) and the recommendations for concurrent assessment and relationship with other units (9.5 below). Practice in the workplace and during training is also subject to regulations directly related to occupational health and safety and where applicable contracts of training such as apprenticeships. Note : |
Licensing/Regulatory Information
1 .2 ) License to practice |
The skills and knowledge described in this unit may, in some jurisdictions, require a licence to practise in the workplace subject to regulations for undertaking refrigeration and air conditioning work. Practice in workplace and during training is also subject to regulations directly related to occupational health and safety and where applicable contracts of training such as apprenticeships. Note. |
Pre-Requisites
Prerequisite Unit(s) |
2) |
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2.1) Competencies |
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Granting competency in this unit shall be made only after competency in the following unit(s) has/have been confirmed |
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UEENEEJ178A |
Apply safety awareness and legal requirements for ammonia refrigerant |
Employability Skills Information
Employability Skills |
3 ) This unit contains Employability Skills The required outcomes described in this unit of competency contain applicable facets of Employability Skills. The Employability Skills Summary of the qualification in which this unit of competency is packaged will assist in identifying Employability Skill requirements. |
Elements and Performance Criteria Pre-Content
6 ) Elements describe the essential outcomes of a unit |
Performance criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
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1 |
Prepare to operate Ammonia refrigerant plant |
1.1 |
OHS procedures for a given work area are identified, obtained and understood through established routines and procedures. |
1.2 |
Refrigeration systems and components on which the work is to be carried out are identified. |
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1.3 |
Established OHS risk control measures and procedures are followed in preparation for the work. |
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1.4 |
Safety hazards which have not previously been identified are reported and advice on risk control measures is sought from the work supervisor. |
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1.5 |
The nature of work is obtained from documentation or from work supervisor to establish the scope of work to be undertaken. |
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1.6 |
Advice is sought from the work supervisor to ensure the work is coordinated effectively with others. |
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1.7 |
Sources of materials that may be required for the work are accessed in accordance with established routines and procedures. |
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1.8 |
Tools, equipment and testing devices needed to carry out the work are obtained and checked for correct operation and safety |
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1.9 |
The refrigeration system's required operating conditions are established from documentation/supervisor and the application of refrigeration fundamentals |
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2 |
Operate Ammonia refrigeration plant |
2.1 |
Established OHS risk control measures and procedures for carrying out the work are followed. |
2.2 |
Refrigeration plant is started up in accordance with established procedures, standard, codes and regulations |
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2.3 |
Measuring refrigeration system operating parameters is conducted in strict accordance with OHS requirements and established safety procedures |
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2.4 |
Supervisor or person in charge is advised of system and components performing outside their operating parameters to facilitate remedial action. |
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2.5 |
Remedial action is implemented within the organisation's procedures. |
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2.6 |
Service procedures are completed according to identified organisational procedures according to SOPs. |
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2.7 |
Daily processing requirements are ascertained to predict demand on refrigeration plant. |
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2.8 |
Oral and written information on the performance of the plant is exchanged formally and informally between the operator and supervisor/production team. |
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2.9 |
Equipment controls are adjusted to prepare plant to meet the load. |
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2.10 |
Action is taken in a proactive way to maintain the performance of the plant. |
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2.11 |
Demands on plant consumables are calculated to facilitate the ordering of replacements. |
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2.12 |
Strategies are developed to meet demand in the event of equipment malfunction or breakdown. |
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3 |
Complete work and report on operating Ammonia refrigeration plant |
3.1 |
OHS work completion risk control measures and procedures are followed. |
3.2 |
Work site is cleaned and made safe in accordance with established procedures. |
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3.3 |
Plant performance records are maintained and distributed to meet organisational standards. |
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Required Skills and Knowledge
REQUIRED SKILLS AND KNOWLEDGE |
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7) This describes the essential skills and knowledge and their level, required for this unit. |
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Evidence shall show that knowledge has been acquired of refrigeration plant using ammonia as the refrigeration medium safe working practices and operation. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. |
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KS01-EJ196A |
Ammonia refrigeration system operation |
Evidence shall show an understanding of refrigeration principles, Ammonia refrigeration systems, their operating conditions, and starting up and shut down procedures, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: |
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T1 Introduction to the Vapour Compression System
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T2 Heat
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T3 Temperature and relative humidity
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T4 Sensible and Latent Heat
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T5 Pressure
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T6 Refrigerant conditions
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T7 The vapour compression cycle
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T8 Working safely with refrigeration vapour compression systems
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T9 Ammonia Refrigeration Systems
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T10 Operating conditions of Ammonia Refrigeration Systems
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T11 System start up and shut down procedures |
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T12 Emergency procedures |
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T13 Maintenance and servicing procedures
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Evidence Guide
EVIDENCE GUIDE |
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9 ) 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. |
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Overview of Assessment |
9 .1 ) 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 industry-preferred 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 substance/material 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 how/how 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 |
9 .2 ) Before the critical aspects of evidence are considered all prerequisites shall 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 - UEE07'. Evidence shall also comprise:
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A Starting up Ammonia refrigerant plant B.Selecting and using appropriate measuring devices correctly |
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C Recording measurements D Using calculation methods accurately E Identifying the conditions of the refrigerant (R717) at various locations in the vapour compression and liquid recirculation system. |
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F Taking remedial action within organisational procedures and job role |
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G Documenting operating conditions correctly |
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H. Conducting servicing procedures according to the schedule, including the inspection of all lagging, insulation, pipe and duct mountings I. Shutting down Ammonia refrigerant plant J. 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 |
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Context of and specific resources for assessment |
9 .3 ) This unit should be assessed as it relates to normal work practice using procedures, information and resources typical of a workplace. This should include:
These should be part of the formal learning/assessment 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 operating and servicing ammonia refrigeration plant in a safe manner following organisational procedures. |
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Method of assessment |
9 .4 ) This unit shall be assessed by methods given in Volume 1, Part 3 'Assessment Guidelines'. Note: |
Concurrent assessment and relationship with other units |
9 .5 ) |
For optimisation of training and assessment effort, competency development in this unit may be arranged concurrently with unit: UEENEEJ178A Apply safety awareness and legal requirements for ammonia refrigerant |
Range Statement
RANGE STATEMENT |
8 ) This relates to the unit as a whole providing the range of contexts and conditions to which the performance criteria apply. It allows for different work environments and situations that will affect performance. |
This unit must be demonstrated in relation to Ammonia refrigeration systems and include starting up, determining operating conditions using measurement and basic calculation methods, basic repairs and shutting down the system. These conditions include suction, inter-stage and discharge pressures, ambient, evaporator, inter-stage and condensing temperatures, evaporator, and condenser temperature difference. |
Generic terms used throughout this Vocational Standard shall be regarded as part of the Range Statement in which competency is demonstrated. The definition of these and other terms that apply are given in Volume 2, Part 2.1. |
Unit Sector(s)
Not Applicable
Competency Field
2 .2 ) Literacy and numeracy skills Participants are best equipped to achieve competency in this unit if they have reading, writing and numeracy skills indicated by the following scales. |
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Reading |
2 |
Writing |
2 |
Numeracy |
2 |
2.2) Literacy and numeracy skills
Competency Field |
5 ) |
Refrigeration and Air Conditioning |