ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

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

1

Prepare to service secondary refrigeration system

1.1

Type of secondary refrigeration system components and operation are identified

1.2

WHS/OHS requirements and workplace procedures and safety data sheets (SDS) are identified and risk control measures implemented, including wearing personal protective equipment (PPE)

1.3

Safety hazards not previously identified are assessed, documented and risk control measures devised and implemented

1.4

Extent of faults is determined from reports, documentation, observation and discussions with appropriate person/s

1.5

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

1.6

Tools, equipment and testing devices needed to carry out refrigeration work are obtained in accordance with workplace procedures and checked for correct operation and safety

2

Carry out secondary refrigeration maintenance requirements

2.1

WHS/OHS requirements, regulations, workplace procedures and risk control measures are followed

2.2

Components are checked and isolated in accordance with WHS/OHS requirements and procedures

2.3

Refrigeration maintenance tests are performed on the primary cooling source, operating pressures, operating current, refrigerant charge, secondary flow rates and condenser cooling system, and system faults or non-compliance documented to operational specifications

2.4

Refrigeration operational maintenance tests are performed on the secondary refrigerant pumping/circulation devices, pressure and flow rates recorded, and faults or non-compliance to system specification documented

2.5

Chemical integrity, including the dilution rate, anti-bacterial and anti-corrosion rates of the secondary refrigerant, is checked using test kit and following approved WHS/OHS procedures, including PPE, and results or non-compliance are documented

2.6

Secondary refrigerant pipe work is checked for leaks and stability and its insulation is checked for soundness

2.7

Refrigeration system components, evaporators, blowers, other heat exchangers, heat recovery or defrost systems are checked for correct operation and cleanliness

2.8

Control system operation, including safety controls and any faults or non-conformity to system specifications are documented in accordance with WHS/OHS guidelines and workplace practices

3

Repair secondary refrigeration system

3.1

Justification for solutions used to solve refrigeration system problems is documented in accordance with workplace procedures

3.3

Repair work is documented and appropriate person/s notified in accordance with workplace procedures

3.4

Repairs to refrigeration system components are performed to achieve compliance to design operation and manufacturer recommendations for effective operation

3.5

Refrigeration control system are adjusted, as required, to achieve compliance to design operation and manufacturer recommendations for effective operation

3.6

Record of flows, pressures and temperatures obtained before and after repair are compared to refrigeration specifications and contingency measures implemented, as required, to ensure compliance to design operation and manufacturer recommendations for effective operation

4

Complete reports on refrigeration maintenance and repair activities

4.1

Work area is cleaned and made safe in accordance with workplace procedures and practices

4.2

Refrigeration service/maintenance and repair activities on secondary refrigeration system and relevant non-compliance specification after repair are documented and reported to appropriate person/s