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Evidence Guide: UEERA0047 - Install and commission carbon dioxide refrigeration systems, components and associated equipment

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

 

UEERA0047 - Install and commission carbon dioxide refrigeration systems, components and associated equipment

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

Prepare to install CO² refrigeration components and associated equipment

  1. WHS/OHS hazards, risk control methods, relevant standards, codes and legislation are obtained and applied
WHS/OHS hazards, risk control methods, relevant standards, codes and legislation are obtained and applied

Completed
Date:

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Safety hazards not previously identified are reported, assessed and advice on risk control measures is sought from work supervisor

Completed
Date:

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Nature of work is obtained from documentation or from work supervisor to determine the scope of work to be undertaken

Completed
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Refrigeration component and equipment installation is appropriately sequenced in accordance with job schedule

Completed
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Sources of materials required for refrigeration work are obtained in accordance with workplace procedures

Completed
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Tools, equipment and testing devices needed to carry out refrigeration work are obtained and checked for correct operation and safety

Completed
Date:

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Install CO² refrigeration system

  1. Circuits/machines/plant are checked and isolated in accordance with WHS/OHS requirements and workplace procedures
Circuits/machines/plant are checked and isolated in accordance with WHS/OHS requirements and workplace procedures

Completed
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Refrigeration components and equipment are installed in accordance with technical industry standards, job specifications and requirements with sufficient access to affect electrical and pipe work connections and maintenance

Completed
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Refrigeration components and equipment are installed straight and square, in the required locations and within acceptable tolerances

Completed
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Pressure testing is conducted at a pressure compatible with CO² and in accordance with industry standards

Completed
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Leaks are located and rectified using testing methods appropriate to the system and in accordance with industry standards and practices

Completed
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Refrigeration system is evacuated to the required level and cleaned of moisture and contaminants in accordance with industry standards and practices

Completed
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Unplanned situations are responded to in accordance with workplace procedures, discussed with appropriate person/s and documented in a manner that minimises risk to personnel and equipment

Completed
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Installation and tests are carried out without damage to apparatus, circuits, the surrounding environment or services and using sustainable energy practices

Completed
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Commission CO² refrigeration system

  1. Commissioning work is appropriately sequenced in accordance with job specification
Commissioning work is appropriately sequenced in accordance with job specification

Completed
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Appropriate person/s is consulted to ensure the work is coordinated effectively with others involved on the worksite

Completed
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Extent of the system and location of system components is determined from site inspection and/ or job specifications and diagrams

Completed
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System control settings and operating parameters are determined from job specifications and requirements

Completed
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Tools, equipment and testing devices needed to commission a CO² refrigerant system are obtained and checked for correct operation and safety

Completed
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Refrigeration system is charged safely with refrigerant grade CO² and compatible lubricants in accordance with industry standards and practices

Completed
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Refrigeration actual and specified range of operating conditions are determined from measured and calculated values as they apply to CO² vapour compression and volatile secondary (liquid recirculation/cascade) system in accordance with workplace procedures

Completed
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Pre-commissioning checks are undertaken to ensure components are in place and secure in accordance with manufacturer specifications and industry standards

Completed
Date:

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Need to test or measure live operating CO² system is determined in accordance with WHS/OHS requirements and workplace safety procedures

Completed
Date:

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CO² refrigeration system pressure controls, valves, pumps and regulators are adjusted to their required settings

Completed
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Testing/measuring devices are used to observe the operation of refrigeration system and fine adjustments of controls are made as required in accordance with manufacturer specifications

Completed
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Commissioning is conducted efficiently, without waste of materials or damage to apparatus, the surrounding environment or services and using sustainable energy practices

Completed
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Complete work and relevant documentation

  1. Worksite is cleaned and made safe in accordance with workplace procedures
Worksite is cleaned and made safe in accordance with workplace procedures

Completed
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Final check of the installed components and equipment is made to verify that it complies with relevant industry standards and job requirements

Completed
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'As-installed' refrigeration components and equipment are documented and appropriate person/s notified in accordance with workplace established procedures

Completed
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Commissioning results are documented and include final operating parameters of the refrigeration system

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least two separate occasions and include:

applying relevant work health and safety (WHS)/occupational health and safety (WHS/OHS) requirements and workplace procedures and practices, including using risk control measures

applying sustainable energy principles and practices

installing carbon dioxide (CO²) refrigeration system components, pipe work and associated equipment

dealing with unplanned events/situations in accordance with workplace procedures in a manner that minimises risk to personnel and equipment

discharging/charging refrigerant/lubricants and pressure testing the system without damage to components

documenting operating conditions correctly (commissioning)

identifying the conditions of the CO² refrigerant at various locations in the vapour compression and volatile secondary (liquid recirculation) system

installing, connecting, securing and aligning components and equipment and ensuring that equipment and pipe work is compliant with relevant industry standards, codes of practice and regulations

locating and rectifying leaks

optimising system performance and efficiency

pressure testing entire system at the appropriate design test pressures using dry nitrogen

reading and interpreting drawings to pipe work layouts and apparatus locations

recording measurements

removing system contaminants and evacuating

selecting and using appropriate measuring devices correctly

using calculation methods accurately

using methodical and efficient commissioning techniques.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

installation and commissioning procedures for CO² refrigeration systems, including:

materials and installation procedures:

material selection

copper pipe standards

steel pipe standards

pipe connections

pipe supports hangers and connections

arrangement of isolation valves

location of relief valves

commissioning:

pressure testing

evacuation and dehydration

charging refrigerant and lubricant

system testing and adjustment

documentation

operating conditions of CO² vapour compression and volatile secondary (liquid recirculation/cascade) system/s

relevant industry standards and practices

relevant manufacturer specifications

relevant job safety assessments or risk mitigation processes

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace policies and procedures.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Installing, connecting and commissioning CO² refrigeration system, components and associated equipment must include at least the following:

major components:

compressors

cascade condensers

evaporators

liquid recirculation pump/s

associated equipment:

refrigerant piping

refrigerant flow controls

cycling controls

safety controls

relief valves

isolation valves

monitoring and inspection accessories

Note: Steel pipe welding competency is not covered by this unit.