ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to install CO² refrigeration components and associated equipment

1.1

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

1.2

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

1.3

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

1.4

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

1.5

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

1.6

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

2

Install CO² refrigeration system

2.1

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

2.2

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

2.3

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

2.4

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

2.5

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

2.6

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

2.7

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

2.8

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

3

Commission CO² refrigeration system

3.1

Commissioning work is appropriately sequenced in accordance with job specification

3.2

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

3.3

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

3.4

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

3.5

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

3.6

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

3.7

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

3.8

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

3.9

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

3.10

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

3.11

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

3.12

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

4

Complete work and relevant documentation

4.1

Worksite is cleaned and made safe in accordance with workplace procedures

4.2

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

4.3

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

4.4

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