Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MEM18084 Mapping and Delivery Guide
Commission and decommission split air conditioning systems

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency MEM18084 - Commission and decommission split air conditioning systems
Description
Employability Skills
Learning Outcomes and Application This unit of competency defines the skills and knowledge required to commission and decommission single head split air conditioning systems, up to 18kW, to relevant standards, codes and local regulations.It includes the application of safe working practices, following standard procedures to pressure test, evacuate, recover, charge and perform functional checks to test system performance. This unit refers to plug in appliances only. A Refrigerant Handling Licence must be held by any person who carries out work in relation to refrigeration and air conditioning equipment. Band: AUnit Weight: 4
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites
Competency Field Maintenance and diagnostics
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Determine job requirements
  • Follow standard operating procedures (SOPs)
       
Element: Comply with work health and safety (WHS) requirements at all times
       
Element: Use appropriate personal protective equipment (PPE) in accordance with SOPs
       
Element: Identify job requirements from specifications, drawings, job sheets or work instructions
       
Element: Determine the operating conditions of vapour compression systems
  • Determine the actual and specified range of operating conditions from measured and calculated values using established procedures to determine as they apply to particular vapour compression systems
       
Element: Establish operating conditions and record on commissioning documentation
       
Element: Obtain tools, equipment and testing devices needed to determine the basic operating conditions and check for correct operation and safety
       
Element: Recover refrigerants from split air conditioning systems
  • Check for, and protect site from, ignition sources if R32 or other flammable refrigerants are used
       
Element: Isolate circuits/appliances in strict accordance with work health and safety (WHS) requirements and procedures, where necessary
       
Element: Remove refrigerants safely into suitably labelled containers in accordance with legislative and industry requirements
       
Element: Deal with contaminated refrigerant in accordance with requirements
       
Element: Pressure and leak test split air conditioning systems
  • Identify and note safety hazards and implement established risk control measures
       
Element: Follow industry codes of practice and manufacturer installation instructions
       
Element: Take precautions to prevent damage to components while pressure testing the system
       
Element: Conduct pressure testing at a pressure compatible with the refrigerant to be used
       
Element: Located leak, isolate and repair using methods appropriate to the system type under test and in accordance with industry practices
       
Element: Evacuate split air conditioning systems
  • Note safety hazards which have not previously been identified, and implement established risk control measures
       
Element: Evacuate the system to the required level and clean the system of all moisture and other containments in accordance with requirements
       
Element: Apply a standing vacuum test in accordance with industry codes of practice and applicable standards
       
Element: Charge split air conditioning systems
  • Select correct refrigerant for the system, in accordance with manufacturer requirements and industry practices
       
Element: Measure the refrigerant charge by weight in accordance with manufacturer specifications
       
Element: Charge the system in accordance with manufacturer requirements and industry practices
       
Element: Check all components and maintain in accordance with manufacturer requirements
       
Element: Test the operation of split air conditioning systems
  • Start and operate the system
       
Element: Carry out standard tests to confirm system performance to manufacturer specifications
       
Element: Check the refrigerant charge and add refrigerant, if required
       
Element: Record test data, as required
       
Element: Complete the commissioning/ recommissioning of split air conditioning systems
  • Ensure the worksite is cleaned and left in presentable condition in accordance with original presentation, client requirements, industry standards and organisational requirements
       
Element: Undertake final inspections to ensure installation conforms to industry, legislative and work order requirements
       
Element: Instruct the client on the use of the product in accordance with organisational requirements and manufacturer specifications
       
Element: Complete certificates of compliance and other relevant commissioning documentation and process in accordance with state/territory regulatory requirements
       
Element: Decommission split air conditioning systems
  • Electrically disconnect plug in appliance
       
Element: Recover refrigerants, store and dispose of in accordance with legislative and industry requirements
       
Element: Remove units and components and dispose of safely and in accordance with regulations, industry codes of practice and sustainable environmental practices
       
Element: Clean the worksite and leave in presentable condition, to client and organisational requirements, industry standards and sustainable environmental practices
       
Element: Complete decommissioning documentation and process in accordance with state/territory regulatory requirements
       

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Tools, equipment and testing devices include one (1) or more of the following:

refrigeration gauge manifold

Schraeder access valves; quick connect couplings, and thermometer/thermocouple temperature measuring devices

analogue and digital vacuum measuring gauges

digital scales

refrigerant recovery unit

vacuum pump

electronic leak detectors

refrigerant containers/cylinders

Legislative and industry requirements include one (1) or more of the following:

Commonwealth, state and territory legislation, regulations, standards and industry codes of practice

The Ozone Protection and Synthetic Greenhouse Gas Legislation Amendment Bill 2003

air conditioning residential best practice guidelines (AIRAH)

AIRAH flammable refrigerants fact sheets and guide

state/territory and local building regulations

sustainable environmental practices for commissioning and decommissioning split air conditioning

System performance includes one (1) or more of the following:

pressure

temperature

sub-cooling

superheating

evaporator coil to air temperature difference

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Follow standard operating procedures (SOPs) 
 
 
 
Determine the actual and specified range of operating conditions from measured and calculated values using established procedures to determine as they apply to particular vapour compression systems 
 
 
Check for, and protect site from, ignition sources if R32 or other flammable refrigerants are used 
 
 
 
Identify and note safety hazards and implement established risk control measures 
 
 
 
 
Note safety hazards which have not previously been identified, and implement established risk control measures 
 
 
Select correct refrigerant for the system, in accordance with manufacturer requirements and industry practices 
 
 
 
Start and operate the system 
 
 
 
Ensure the worksite is cleaned and left in presentable condition in accordance with original presentation, client requirements, industry standards and organisational requirements 
 
 
 
Electrically disconnect plug in appliance 
 
 
 
 

Forms

Assessment Cover Sheet

MEM18084 - Commission and decommission split air conditioning systems
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

MEM18084 - Commission and decommission split air conditioning systems

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: