- MEM18095A - Maintain and repair cooling towers/evaporative condensers and associated equipment
Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners
MEM18095A Mapping and Delivery Guide
Maintain and repair cooling towers/evaporative condensers and associated equipment
Version 1.0
Issue Date: May 2024
| Qualification | - |
Unit of Competency | MEM18095A - Maintain and repair cooling towers/evaporative condensers and associated equipment |
|---|---|---|---|
| Description | The unit covers performing maintenance procedures and/or repairs on cooling towers or evaporative condensers, centrifugal water pumps, valves - including bypass valves, fans, belts and controls to ensure performance to relevant codes and standards. | ||
| Employability Skills | This unit contains employability skills. | ||
| Learning Outcomes and Application | Cooling towers and evaporative condensers form an integral part of the refrigeration system - in commercial, industrial and air conditioning fields. The towers, condensers, centrifugal water pumps, fans, valves and controls comprise the maintenance/repair work skills relevant to this field and must be assessed in this context.Demonstration of competency must be in accordance relevant Australian standards, regulations and codes.Where water treatment only is required, then revised MEM13007B (Maintain water treatment systems for cooling towers) should be considered.Where the refitting or repair/replacement of components involves the fabrication and installation of pipework and assemblies, Unit MEM10010B (Install pipework and pipework assemblies) should be accessed. Where any rectification, modification involves electrical disconnection and reconnection, then Unit MEM18049C (Disconnect/reconnect fixed wired equipment up to 1000 volts a.c./1500 volts d.c.) should also be selected.Band: AUnit Weight: 4 | ||
| Duration and Setting | X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting. |
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| Prerequisites/co-requisites | Path 1MEM05006C Perform brazing and/or silver solderingMEM09002B Interpret technical drawingMEM12002B Perform electrical/electronic measurementMEM12023A Perform engineering measurementsMEM18001C Use hand toolsMEM18002B Use power tools/hand held operationsMEM18055B Dismantle, replace and assemble engineering componentsMEM18086B Test, recover, evacuate and charge refrigeration systemsMEM18094B Service and repair commercial refrigerationPath 2MEM05006C Perform brazing and/or silver solderingMEM09002B Interpret technical drawingMEM12002B Perform electrical/electronic measurementMEM12023A Perform engineering measurementsMEM18001C Use hand toolsMEM18002B Use power tools/hand held operationsMEM18055B Dismantle, replace and assemble engineering componentsMEM18086B Test, recover, evacuate and charge refrigeration systemsMEM18088B Maintain and repair commercial air conditioning systems and components | ||
| 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 |
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| Element: Undertake fault finding on cooling tower/evaporative condenser water systems components |
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| Element: Repair/replace cooling tower/evaporative condenser components |
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| Element: Return to service cooling tower/evaporative condenser components. |
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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 cooling towers and/or evaporative condensers, fans, centrifugal water pumps, valves and control equipment. 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 cooling towers/evaporative condensers /pumps/ fans or valves, 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 cooling tower/evaporative condenser fans, valves, centrifugal pumps and components for correct operation obtaining and interpreting specifications comparing system and component performance/operation against specification identifying faulty components and non-compliances making required adjustments to achieve specifications sourcing and using relevant catalogues/lists removing and replacing refrigerant applying safety procedures, standard operating procedures and legislative requirements to all work undertaken documenting results of the adjustments |
Required knowledge |
Look for evidence that confirms knowledge of: terminology of cooling towers psychometrics measuring instruments/equipment, specifications and procedures for checking temperature(s)/humidity/air flow operation of centrifugal water pumps terminology of centrifugal water pumps field testing centrifugal pumps operation of water valves including bypass valve either mechanical or electrical operation procedures for testing and operation of controls procedures for testing of fan motors v belts measuring instruments/equipment, specifications and procedures for checking component noise and vibration levels procedures for reporting non-conformances procedures and sequence for performing preventative maintenance on refrigeration and air conditioning systems specifications, operational characteristics and process for identifying system components process for localising and confirming faulty components procedures and all legislative and regulatory requirements for safely removing the refrigerant and charging the system procedures for dismantling, repairing, reassembling and testing components procedure for removal/recharging refrigerant procedures for selecting replacement parts procedures for completing maintenance records/service reports |
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. | |
Components | Fan motor, fan blade, pump, pump motor, sprays, condenser, valves (bypass, shut-off, temperature control valves), thermostat, drift eliminators, v belt, water strainer |
Operational | How it works |
Test equipment | Sling psychrometer, thermometer, refrigeration gauges, vacuum pump, leak detector, multimeter, insulation resistance tester, assorted hand tools |
Manufacturers' specifications | Details supplied by manufactures |
Characteristics | The design and installation of the particular component |
Malfunction | Could be a fault in any of the components |
Type of installation or equipment | |
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 |
|---|---|---|---|
| Legislative requirements are understood. | |||
| System components are identified. | |||
| The operational function of each component is inspected and tested. | |||
| Correct operation of each component is assessed against specification. | |||
| Visual inspection and testing with appropriate test equipment is carried out according to refrigeration principles, procedures and safety requirements. | |||
| Preventative maintenance tasks are performed to manufacturers' specifications using refrigeration techniques and practices. | |||
| System components are identified correctly. | |||
| The characteristics and operation of each component is understood. | |||
| The operational function of each 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 refrigeration principles, procedures and safety requirements. | |||
| Faulty components are dismantled and repaired to manufactures' specifications as required. | |||
| Replacement parts are selected from manufacturers' or other catalogues according to required specifications. | |||
| Where required, refrigerant is removed/contained following refrigeration principles and procedures to all relevant standards, codes and safety standards. | |||
| Components are reassembled and tested for correct operation and assessed against specification. | |||
| Where required, refrigerant is added to system, following refrigeration principles and procedures to all relevant standards, codes and safety standards. | |||
| Using refrigeration principles and system application, correct operation of the equipment is verified. | |||
| Maintenance records/service reports are completed by appropriate designated means. |
Forms
Assessment Cover Sheet
MEM18095A - Maintain and repair cooling towers/evaporative condensers and associated equipment
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
MEM18095A - Maintain and repair cooling towers/evaporative condensers and associated equipment
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: