Release 1. This is the first release of this unit of competency in the UEE Electrotechnology Training Package.

This unit involves the skills and knowledge required to design complex commercial refrigeration systems and select equipment.

It includes applying processes and methods of complex commercial refrigeration systems, safety and relevant industry standards; developing alternative design schemes based on a design brief and customer requirements; and documenting system designs.

The skills and knowledge described in this unit may, in some jurisdictions, require a licence or permit to practice in the workplace subject to regulations for undertaking refrigeration and air conditioning work. Practice in the workplace and during training is also subject to work health and safety (WHS)/occupational health and safety (OHS) regulations.

No other licensing, legislative or certification requirements apply to this unit at the time of publication.

UEERA0016 Design commercial refrigeration systems and select components

UEERA0004 Analyse vibration and noise in refrigeration and air conditioning systems

UEERA0038 Establish the thermodynamic parameters of refrigeration and air conditioning systems

UEERA0034 Establish heat loads for commercial refrigeration and/or air conditioning applications

UEERA0042 Evaluate thermodynamic and fluid parameters of refrigeration systems

UEERA0001 Analyse the operation of HVAC air and hydronic systems

UEERA0002 Analyse the psychrometric performance of HVAC/R systems

and

UEERA0003 Analyse the thermodynamic performance of HVAC/R systems

or

UEERA0094 Verify functionality and compliance of refrigeration and air conditioning installations

UEECD0007 Apply work health and safety regulations, codes and practices in the workplace

UEECD0019 Fabricate, assemble and dismantle utilities industry components

UEECD0020 Fix and secure electrotechnology equipment

UEECD0051 Use drawings, diagrams, schedules, standards, codes and specifications

UEECD0016 Document and apply measures to control WHS risks associated with electrotechnology work

UEERA0059 Prepare and connect refrigerant tubing and fittings

UEERA0036 Establish the basic operating conditions of vapour compression systems

UEERA0035 Establish the basic operating conditions of air conditioning systems

UEERA0050 Install refrigerant pipe work, flow controls and accessories

UEERA0081 Select refrigerant piping, accessories and associated controls

UEERA0031 Diagnose and rectify faults in air conditioning and refrigeration control systems

UEERA0092 Solve problems in low voltage refrigeration and air conditioning circuits

UEERL0005 Locate and rectify faults in low voltage (LV) electrical equipment using set procedures

UEERL0004 Disconnect - reconnect electrical equipment connected to low voltage (LV) installation wiring

UEERL0001 Attach cords and plugs to electrical equipment for connection to a single phase 230 Volt supply

UEERL0002 Attach cords, cables and plugs to electrical equipment for connection to 1000 V a.c. or 1500 V d.c.

Refrigeration and air-conditioning

Electrotechnology

ELEMENTS 

PERFORMANCE CRITERIA 

Elements describe the essential outcomes.

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

1  

Prepare to design complex commercial refrigeration system 

1.1 

WHS/OHS requirements and workplace procedures for a given work area are identified, obtained and applied

1.2 

WHS/OHS risk control measures and workplace procedures are followed in preparation for the work

1.3 

Scope of the proposed refrigeration system is determined from the design brief and/or consultations with relevant person/s

1.4 

Design development work is planned in accordance with workplace procedures for timelines in consultation with others involved

2 

Design complex commercial refrigeration system 

2.1 

Relevant commercial refrigeration processes and methods are applied to the design

2.2 

Alternative concepts for design are evaluated in accordance with the design brief

2.3 

Safety, functionality and budgetary considerations are incorporated in the design specifications

2.4 

System design draft is checked for compliance in accordance with the design brief and relevant industry standards

2.5 

System design is documented and submitted to relevant person/s for approval in accordance with workplace procedures

2.6 

Unplanned events are dealt with in accordance with problem-solving techniques and workplace procedures

3 

Obtain approval for complex commercial refrigeration system design 

3.1 

System design is presented to customer and/or relevant person/s in accordance with workplace procedures

3.2 

Requests for alterations to the design are negotiated with relevant person/s in accordance with workplace procedures

3.3 

Final design is documented and approval obtained from relevant person/s in accordance with workplace procedures

3.4 

Quality of work is monitored in accordance with workplace procedures and relevant industry standards

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

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.

Designing a complex commercial refrigeration system must include at least the following:

• one multiple major component, including:

• compressors
• condenser
• evaporators
• circuits and/or systems
• associated components and controls

This unit replaces and is equivalent to UEENEEJ141A Design complex commercial refrigeration systems and select equipment.

Release 1. This is the first release of this unit of competency in the UEE Electrotechnology Training Package.

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 one occasion and include:

• developing outlines of alternative designs
• developing the design within the safety, regulatory, functional requirements and budget limitations
• documenting and presenting design effectively
• successfully negotiating design alteration requests
• obtaining approval for final design
• dealing with unplanned events
• applying relevant work health and safety (WHS)/occupational health and safety (WHS/OHS) requirements, including using risk control measures
• designing complex commercial refrigeration system
• preparing to design complex commercial refrigeration system.

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:

• complex commercial refrigeration system design, safe working practices and relevant standards, codes and regulations, including:

• commercial refrigeration system types:

• medium and low temperature applications
• operating conditions
• system operating and service requirements
• refrigerant types
• components
• multiple evaporator systems
• multiple temperature systems
• multiple compressor (rack) systems
• two stage compressors
• multiplex systems
• defrost requirements and methods
• electric defrost systems
• hot gas defrost systems
• cool gas defrost systems

• manufacturer's data:

• rating tables
• selection tables
• catalogues

• operating characteristics:

• effects of temperature glide with blended refrigerants
• pH charts
• refrigerating effect
• heat of compression
• heat rejected on high side of the system
• required mass flowrate of refrigerant
• volume flowrate at various points in system
• theoretical compressor power
• required condenser capacity

• refrigerant flow controls:

• refrigerant regulating valves
• solenoid valves
• expansion valves
• pressure regulating valves

• automatic systems controls:

• cycling controls
• pressure-stats
• thermo-stats
• defrost controls
• monitoring and alarm controls
• energy management systems
• refrigeration automation system
• control strategies
• control modes

• system design:

• required cooling capacity per day
• running time and required system cooling capacity
• system capacity control for peak and low load
• refrigeration system diagrams
• refrigerant, equipment, major component, controls, piping and accessory selection

• problem-solving techniques
• relevant job safety assessments or risk mitigation processes
• relevant manufacturer specifications
• relevant WHS/OHS legislated requirements
• relevant workplace budget, quality, policies and procedures
• relevant workplace documentation.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in workplace operational suitable situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated suitable workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

• a range of relevant exercises, case studies and/or simulations
• relevant and appropriate materials, tools, facilities and equipment currently used in industry
• applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals.