Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

  1. Prepare to service and repair Hydrocarbon refrigeration and air conditioning systems
  2. Service and repair Hydrocarbon refrigeration and air conditioning systems.
  3. Complete work and report on servicing and repairing Hydrocarbon refrigeration and air conditioning systems

Required Skills

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 operating conditions of Hydrocarbon refrigerating systems

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

KSEJA Self contained Hydrocarbon refrigeration and air conditioning systems

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

T Hydrocarbon refrigeration systems

Basic operation system types applications and design operating conditions

Domestic refrigerators

Self contained refrigeration cabinets

Self contained air conditioners

Single head split air conditioners

Heat pump water heaters

T Operating conditions for hydrocarbon refrigeration systems

Compressors

Functions of the compressor

Types construction and their applications

Lubrication and lubricators

Lubrication methods

Safe handling of lubricants

Selection of Lubricants

Adding and removing oil from Hydrocarbon systems

Evaporators Cooling Units

Types construction and applications

Evaporator defrost methods and controls

Operation and maintenance

Refrigerant Flow Devices

Types construction and applications

Operation and maintenance

Ancillary Components

Leak detectors

Safety controls

Operation and maintenance

T Applicable Standards and Codes

Hazards associated with Hydrocarbons

ASNZS

ASNZS

IIAR Bulletins

ANSIASHRAE Standards

International Standards EN

T System access tools

Schraeder valves

Piercing valves

Process tube adaptors

Gauge manifold sets

Maintenance

T Access procedures

Ignition sources

Ventilation

Gauge manifold hoses

System operating values

T Refrigerant removalrecovery and flushing

Bleed to atmosphere

Recovery to a cylinder

Burning

Flush with inert gas

T Tube joining methods

Lokring

Flare joints

Silver brazed joints

Flux

T Compressor lubricants

Types

Properties

Replacing

Disposing

T Pressure testing

Requirements

Recommended pressures

T Evacuation

Vacuum pumps

Vacuum measuring devices

Maintenance

Recommended depth of vacuum

Procedure

T Charging

Precautions

Liquid or vapour charging

Suitable methods

Disposing of contaminated refrigerant and oil

T Leak detection

Methods

Procedure

Maintenance

Evidence Required

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 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 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 to such an extent that the learners performance outcome is reported in accordance with the preferred approach namely a percentile graded result where required by the regulated environment

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

Pressure testing chargingdischarging refrigerantlubricants and determining the operating conditions of self contained Hydrocarbon vapour compression systems

A

Selecting appropriate materials and equipment

B

Obtaining and recording measurements

C

Removing and storing refrigerant correctly

D

Conducting pressure testing at the appropriate pressure level and without damaging components

E

Locating and rectifying leaks

F

Evacuating the system to the required standard and using appropriate vacuum measuring instruments

G

Charging the system with the appropriate type and quantity of hydrocarbon refrigerant

H

Completing the necessary documentation

I

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 servicing and repairing as well as determining the operating conditions of Hydrocarbon 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

The critical aspects of occupational health and safety covered in unit UEENEEEB and other discipline specific occupational health and safety units shall be incorporated in relation to this unit

The critical aspects of occupational health and safety covered in unit UEENEEE001B and other discipline specific occupational health and safety units shall be incorporated in relation to this unit..

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 determining operating conditions, using measurement and basic calculation methods, of primarily self contained Hydrocarbon refrigeration and air conditioning systems.

These systems are confined to those used in the following two Categories of Occupancy described in the Standard EN378-1 Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1: Basic requirements, definitions, classification and selection criteria:

A General Occupancy

B Supervised Occupancy

These systems include domestic refrigerators and freezers; self contained refrigerated cabinets; self contained air conditioning units; single head split air conditioning units; and self contained heat pump water heaters.

It does NOT include systems described in category C Authorised Occupancy. This includes refrigeration and air conditioning equipment installed in plant rooms.

These conditions include suction and discharge pressures, ambient, evaporator and condensing temperatures, evaporator, and condenser temperature difference. Further, this unit must be demonstrated in relation to refrigerant recovery, component replacement, pressure testing, evacuation, charging and leak testing a hydrocarbon system in a safe and environmentally responsible manner.

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.