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Evidence Guide: MEM18091B - Maintain and repair multi stage, cascade and/or ultra-cold industrial refrigeration systems

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEM18091B - Maintain and repair multi stage, cascade and/or ultra-cold industrial refrigeration systems

What evidence can you provide to prove your understanding of each of the following citeria?

Undertake preventive maintenance checks/adjustment on multi stage, cascade and/or ultra-cold industrial refrigeration systems

  1. The temperature, pressure and properties of the multi stage, cascade and/or ultra-cold refrigeration system are checked for conformance to specification.
  2. The noise/vibration levels of the multi stage, cascade and/or ultra-cold refrigeration system are checked for conformance to specification.
  3. Preventative maintenance tasks are performed according to manufacturers' specifications using refrigeration techniques/practices.
The temperature, pressure and properties of the multi stage, cascade and/or ultra-cold refrigeration system are checked for conformance to specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The noise/vibration levels of the multi stage, cascade and/or ultra-cold refrigeration system are checked for conformance to specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Preventative maintenance tasks are performed according to manufacturers' specifications using refrigeration techniques/practices.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Undertake fault finding on multi stage, cascade and/or ultra-cold industrial refrigeration systems and components

  1. System components are identified correctly.
  2. The characteristics and operation of each component is understood.
  3. The operational function of each component is inspected and tested.
  4. Correct operation of each component is assessed against specification.
System components are identified correctly.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The characteristics and operation of each component is understood.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The operational function of each component is inspected and tested.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Correct operation of each component is assessed against specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Repair/replace faulty components

  1. Faulty components are localised and malfunction is confirmed by inspection and testing using industrial refrigeration principles, procedures and safety requirements.
  2. The refrigerant is removed safely from the system and contained in accordance with standard operating procedures and regulatory requirements where appropriate.
  3. Faulty components are dismantled and repaired to manufacturers' specifications as required
  4. Replacement parts are selected from manufacturers' catalogues according to required specifications.
Faulty components are localised and malfunction is confirmed by inspection and testing using industrial refrigeration principles, procedures and safety requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The refrigerant is removed safely from the system and contained in accordance with standard operating procedures and regulatory requirements where appropriate.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Faulty components are dismantled and repaired to manufacturers' specifications as required

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Replacement parts are selected from manufacturers' catalogues according to required specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Return to service multi stage, cascade and/or ultra-cold refrigeration systems

  1. Components are reassembled and tested for correct operation and assessed against specification.
  2. The system is charged with correct refrigerant safely and in accordance with standard operating procedures and regulatory requirements where appropriate.
  3. Using industrial refrigeration principles and system application techniques, correct operation of the equipment is verified.
  4. Maintenance records/service reports are completed by appropriate designated means.
Components are reassembled and tested for correct operation and assessed against specification.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The system is charged with correct refrigerant safely and in accordance with standard operating procedures and regulatory requirements where appropriate.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Using industrial refrigeration principles and system application techniques, correct operation of the equipment is verified.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Maintenance records/service reports are completed by appropriate designated means.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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 multi stage, cascade and/or ultra-cold industrial refrigeration 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 multi stage, cascade cryogenic and ultra-cold industrial refrigeration 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

Required Skills and Knowledge

Required skills

Look for evidence that confirms skills in:

using tools, techniques and equipment necessary to check multi stage, cascade and/or ultra-cold industrial refrigeration systems and components for correct operation

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

Required knowledge

Look for evidence that confirms knowledge of:

measuring instruments/equipment and specifications for checking the temperature/s and properties of the controlled medium/s

procedures for reporting non-conformances

measuring instruments/equipment and specifications for checking component noise and vibration levels

procedures and sequence for performing preventative maintenance

procedures and sequence for performing safety equipment checks

specifications and process for identifying system components

operational characteristics of the system components

procedures and all legislative and regulatory requirements for safely removing the refrigerant from the system

procedures for dismantling and repairing components, selecting replacement parts, reassembling and testing

procedures for completing maintenance records/service reports

hazard and control measures associated with maintaining and repairing multi stage, cascade and/or ultra-cold industrial refrigeration systems

safe work practices and procedures

calculations and numerical operations within the scope of this unit

Range Statement

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