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Evidence Guide: UEERA0046 - Install and commission ammonia 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

 

UEERA0046 - Install and commission ammonia refrigeration systems, components and associated equipment

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

Prepare to install ammonia refrigeration system

  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:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Safety hazards not previously identified are reported, assessed and advice on risk control measures sought from the project engineer

Completed
Date:

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

Completed
Date:

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Advice is sought from the project engineer to ensure refrigeration work is coordinated effectively with others

Completed
Date:

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Sources of materials required for work are determined in accordance with workplace procedures

Completed
Date:

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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 and commission ammonia refrigeration system

  1. Measuring system operating parameters are conducted in accordance with WHS/OHS requirements and workplace procedures
Measuring system operating parameters are conducted in accordance with WHS/OHS requirements and workplace procedures

Completed
Date:

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Major components and pipe work are installed in accordance with relevant industry standards, codes of practice and regulations

Completed
Date:

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Pressure testing is conducted at a pressure compatible with ammonia and in accordance with industry standards and practices

Completed
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Precautions are taken to prevent damage to components while pressure testing the system

Completed
Date:

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

Completed
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Refrigeration system is evacuated in accordance with industry standards and practices

Completed
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Refrigeration system is charged safely with ammonia and lubricants in accordance with industry standards and practices

Completed
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Refrigeration pre-operational checks are carried out on operating and safety controls in accordance with manufacturer specifications

Completed
Date:

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Refrigeration system is commissioned and adjustments made to operating and safety controls

Completed
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Temperature reduction of cool rooms and freezers are undertaken in accordance with industry standards and practices

Completed
Date:

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Refrigeration maintenance is carried out and includes inspection and cleaning of strainers and filters and collection of oil sample for analysis

Completed
Date:

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Training is conducted for person/s responsible for the refrigeration system operation and maintenance

Completed
Date:

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Complete and report on commissioning of ammonia refrigeration system

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

Completed
Date:

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Contaminated refrigerant and lubricant are dealt with in accordance with legislative/regulatory requirements

Completed
Date:

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Refrigeration operation condition and commissioning data are documented and includes parameters not within the specified range for the system

Completed
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Refrigeration mechanical and electrical commissioning documentation is completed in accordance with workplace procedures

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 legislative, industry standards and practices

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

conducting refrigeration system operation and maintenance

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

identifying the conditions of the ammonia (R717) refrigerant at various locations in the vapour compression and 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

pressure testing, charging/discharging refrigerant/lubricants and determining the operating conditions of ammonia vapour compression and liquid recirculation refrigeration system

recording measurements

removing system contaminants and evacuating

selecting and using appropriate measuring devices correctly

using calculation methods accurately

using methodical and efficient commissioning techniques in accordance with workplace procedures.

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:

cool room and freezer construction, including:

commissioning procedures

construction materials

construction methods

defrost methods

underfloor heating

installation and commissioning techniques for ammonia refrigeration systems

insulation and vapour barrier, including insulation materials and vapour barriers

refrigeration control system testing and adjustment, including:

central programmable logic controller (PLC) system

defrost methods and controls

flow controls

refrigerant level controls

refrigerant pressure controls

temperature controls

refrigerant piping, including:

hydraulic shock

installation principles

material compatibility

pipe sizing principles

pressure testing/evacuation

relief valves

welding

relevant job safety assessments or risk mitigation processes

relevant legislative, industry standards and practices

relevant manufacturer specifications

relevant WHS/OHS legislated requirements

relevant workplace documentation, including reports on installation and commissioning of ammonia refrigeration systems

relevant workplace policies and procedures, including workplace emergency response plan

testing and commissioning ammonia refrigeration systems, including:

air cooled condensers

compressors

direct contact freezing

evaporative condensers

evaporators (air/fluid cooling)

high pressure receivers

secondary refrigerants

start-up and shutdown procedures

water cooled condensers.

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 and commissioning ammonia refrigeration system must include at least the following:

determining:

suction and discharge pressures

ambient, evaporator and condensing temperatures

evaporator and condenser temperature difference

critical point of ammonia (R717)

Charging and discharging must include the following:

ammonia (R717) system with refrigerant and lubricant in a safe and environmentally responsible manner