- MEM18089B - Maintain and repair central air handling systems
Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners
MEM18089B Mapping and Delivery Guide
Maintain and repair central air handling systems
Version 1.0
Issue Date: April 2024
| Qualification | - |
Unit of Competency | MEM18089B - Maintain and repair central air handling systems |
|---|---|---|---|
| Description | This unit covers maintaining and repairing large central air handling systems. It includes interpreting drawings and diagrams of large central air handling systems; utilising fault finding procedures and testing equipment to identify and diagnose faults in systems and isolate faulty components; rectifying faults; returning to service; testing the systems; and completing service reports. | ||
| Employability Skills | This unit contains employability skills. | ||
| Learning Outcomes and Application | This unit applies to air handling systems including boilers, chillers, secondary refrigeration pumps, dehumidifiers, odour control, complex filtering systems, multi zone air distribution systems, etc., typically used for comfort air conditioning. The application of this competency must cover a variety of refrigeration and air conditioning equipment and systems. Prerequisite pathways must be applied within a refrigeration / air conditioning context.Band: AUnit Weight: 6 | ||
| Duration and Setting | X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting. |
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| Prerequisites/co-requisites | Path 1MEM09002B Interpret technical drawing MEM10002B Terminate and connect electrical wiring MEM12002B Perform electrical/electronic measurement MEM12023A Perform engineering measurements MEM18001C Use hand tools MEM18002B Use power tools/hand held operations MEM18049C Disconnect/reconnect fixed wired equipment up to 1000 volts a.c./1500 volts d.c. MEM18055B Dismantle, replace and assemble engineering components MEM18086B Test, recover, evacuate and charge refrigeration systems Path 2MEM09002B Interpret technical drawing MEM12023A Perform engineering measurements MEM13007B Maintain water treatment systems for cooling towers MEM18001C Use hand tools MEM18002B Use power tools/hand held operations MEM18055B Dismantle, replace and assemble engineering components MEM18086B Test, recover, evacuate and charge refrigeration systems | ||
| 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: Undertake preventive maintenance checks/adjustment on large central air handling systems |
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| Element: Undertake fault finding on large central air handling systems |
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| Element: Repair/replace faulty air handling components |
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| Element: Return to service large central air handling systems |
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Evidence Required
List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package. | |
Overview of assessment | A person who demonstrates competency in this unit must be able to maintain and repair large central air handling systems. Competency in this unit cannot be claimed until all prerequisites have been satisfied. |
Critical aspects for assessment and evidence required to demonstrate competency in this unit | Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts. |
Context of and specific resources for assessment | This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate. This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with the maintenance and repair of large central air handling systems or other units requiring the exercise of the skills and knowledge covered by this unit. |
Method of assessment | Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials. |
Guidance information for assessment | |
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.
Required skills |
Look for evidence that confirms skills in: using tools, techniques and equipment necessary to check large central air conditioning system, sub-systems and components for correct operation obtaining, reading and interpreting specifications comparing system, sub-systems and component performance/operation against specification identifying faulty components and non-compliances making required adjustments to achieve specifications sourcing and using relevant catalogues/lists applying safety procedures, standard operating procedures and legislative requirements to all work undertaken documenting results of the adjustments reading, interpreting and following information on written job instructions, specifications, standard operating procedures, charts, lists, drawings and other applicable reference documents planning and sequencing operations checking task-related information undertaking calculations and numerical operations within the scope of this unit using tools, techniques and equipment necessary to check large central air conditioning system, sub-systems and components for correct operation |
Required knowledge |
Look for evidence that confirms knowledge of: appropriate measuring instruments/equipment and specifications for checking humidity, air temperatures, air flows, air quality and air pressure procedures for reporting non-conformances measuring instruments/equipment and specifications required for checking sub-system noise and vibration levels procedures and sequence for performing preventative maintenance on an air conditioning system specifications of and process for identifying primary and secondary refrigerant, or air distribution/reticulation systems operational characteristics of each sub-system component procedures and specifications for inspecting and testing each sub-system component process for localising and confirming faulty components procedures for dismantling and repairing faulty components procedures for selecting replacement parts procedures for completing maintenance records/service reports hazards and control measures associated with maintaining and repairing large central air handling systems safe work practices and procedures codes and regulations relevant to the refrigeration/air conditioning industry including environmental and ozone and greenhouse substance legislation |
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. | |
Preventative maintenance tasks | Check/adjust fan belts, check/clean filters, check/clean heat exchangers (evaporator and condenser), overhaul of major system components, cleaning of major system components, testing operation of all safety devices |
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 |
|---|---|---|---|
| The temperature, humidity, quality, pressure and flow of air delivered to zones by the air handling system are checked for conformance to specification. | |||
| The noise/vibration levels of the air handling sub-systems are checked for conformance to specification. | |||
| Preventative maintenance tasks are performed according to manufacturers' specifications using appropriate refrigeration and air conditioning techniques/practices. | |||
| Components of sub-systems are correctly identified. | |||
| The characteristics and operation of each sub-system component can be explained. | |||
| The operational function of each sub-system component is inspected and tested. | |||
| Correct operation of each component is assessed against specification. | |||
| Faulty components are localised and malfunction is confirmed by inspection and testing using air conditioning principles, procedures and safety requirements. | |||
| Faulty components are dismantled and repaired to manufacturer' specifications as required. | |||
| Replacement parts are selected from manufacturers' catalogues according to required specifications. | |||
| Components are reassembled and tested for correct operation and assessed against specification. | |||
| Correct operation of the equipment is verified using air handling principles and techniques. | |||
| Maintenance records/service reports are completed by appropriate designated means. |
Forms
Assessment Cover Sheet
MEM18089B - Maintain and repair central air handling 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
MEM18089B - Maintain and repair central air handling 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: