Unit of competency Outline

Date retreived
23/07/2026 1:38 AM AWST

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Install, commission, service and maintain medium temperature systems

Install, commission, service and maintain medium temperature systems

Unit of competency
National Code
UEERA0053
State Code
OCA80
TGA Status
Current
DTWD Status
Approved
Current Release Number
1.00
Current Release Date
05/10/2020
View on TGA
State Implementation and Classification
Approved Date
12/07/2021
Field of Education
031315 - Refrigeration And Air Conditioning Mechanics
Original Release Date
12/07/2021
Nominal Hours
54
Description
This unit involves the skills and knowledge required to safely and effectively install, commission, service and maintain medium temperature cabinets and cool rooms employing a single evaporator and single condensing unit. It includes the ability to source relevant data and schematics; install components, pipe work, accessories and controls to create a functional medium temperature system; commission the system to ensure it operates at the specified design conditions; locate and rectify faults; and carry out routine maintenance procedures.The skills and knowledge in this unit will be applied by refrigeration and air conditioning technicians during the installation, commissioning and servicing of medium temperature refrigeration systems.To undertake this unit, the learner must have a current Trainee Refrigerant Handling Licence as it includes work on refrigeration and air conditioning equipment that carries the risk of a fluorocarbon refrigerant being emitted.The skills and knowledge described in this unit require a national Refrigerant Handling Licence as it includes work on refrigeration and air conditioningequipment that carries the risk of a fluorocarbon refrigerant being emitted while decanting the refrigerant or manufacturing, installing, commissioning, servicing,maintaining or decommissioning refrigeration and air conditioning equipment.The skills and knowledge described in this unit require a licence or permit to practice in the workplace where work is carried out on electrical installations which are designed to operate at voltages greater than 50 volt (V) alternating current (a.c.) or 120 V direct current (d.c.).Competency development activities in this unit are subject to regulations directly related to licensing. Where a licence or permit to practice is not held, skills and knowledge described in this unit require a relevant contract of training, such as an Australian Apprenticeship. Additional and/or other conditions may apply in some jurisdictions subject to regulations related to refrigeration, air conditioning and electrical work. Practice in the workplace and during training is also subject to work health and safety (WHS)/occupational health and safety (OHS) regulations. Permits may also be required for some work environments, such as confined spaces, working aloft, near live electrical apparatus and site rehabilitation.
Notes
Elements and Performance Criteria
1 Prepare to install medium temperature cabinet or cool room systems
  • 1.1 WHS/OHS risk control measures and procedures for carrying out the work are obtained and implemented in accordance with workplace procedures
  • 1.2 Work details are determined from documentation and/or supervisor to establish scope of work to be completed in accordance with workplace procedures
  • 1.3 Components, piping, accessories, controls and consumables for the installation work are obtained and checked against job requirements in accordance with industry standards and codes of practice
  • 1.4 Tools, equipment and testing devices to complete work are obtained in accordance with workplace procedures and checked for operational safety in accordance with workplace procedures
2 Install medium temperature cabinet or cool room systems
  • 2.1 Major components are securely mounted in the locations identified by the documentation or supervisor in accordance with workplace procedures
  • 2.2 Refrigerant pipe work and associated components are installed according to specifications ensuring all connections and tube cleanliness are in accordance with job requirements and workplace procedures
  • 2.3 Pressure testing of the installed components and pipe work is conducted to the required level for the type of refrigerant being used in accordance with relevant codes of practice and industry standards
  • 2.4 Leaks are located and rectified employing appropriate methods in accordance with relevant codes of practice and industry standards
  • 2.5 Refrigeration system is evacuated to remove moisture and other contaminates in accordance with relevant codes of practice and industry standards
  • 2.6 Vacuum drop test is carried out to verify all moisture and other contaminants have been removed from the system in accordance with relevant codes of practice and industry standards
  • 2.7 Power and control circuit wiring is checked to ensure it conforms to circuit diagram specifications and system is electrically safe to energise in accordance with relevant codes of practice and industry standards.
3 Commission medium temperature cabinet or cool room systems
  • 3.1 Refrigeration system is charged with the appropriate type and quantity of refrigerant in accordance with relevant codes of practice, industry standards and manufacturer specifications
  • 3.2 Operation of the refrigerant metering device is adjusted, as necessary, to ensure operating low side superheat is in accordance with industry standards, codes of practice and/or workplace documentation or supervisor
  • 3.3 Safety and cycling controls are adjusted to ensure the operational values are in safe and efficient operation in accordance with codes of practice and/or workplace documentation or supervisor
  • 3.4 Measurements are obtained and recorded to confirm that the refrigerant charge is optimal and the system is operating within specified parameters in accordance with codes of practice and industry standards
4 Locate and rectify faults and carry out maintenance on medium temperature cabinet or cool room systems
  • 4.1 Fault diagnosis is carried out in a logical and effective manner in accordance with relevant codes of practice, industry standards and workplace procedures
  • 4.2 Fault-finding and rectification processes are carried out effectively without damage to the system and components in accordance with relevant codes of practice, industry standards and workplace procedures
  • 4.3 System is returned to an operational state in accordance with workplace procedures and manufacturer specifications
  • 4.4 Components that require routine maintenance are identified and regularly maintained in accordance with relevant timeframes, industry standards and workplace procedures
5 Complete work and report activities
  • 5.1 WHS/OHS risk control measures continue to be applied in accordance with workplace procedures
  • 5.2 Worksite and equipment are cleaned and made safe in accordance with workplace procedures
  • 5.3 Refrigerant usage is recorded in accordance with relevant industry regulations and codes of practices
  • 5.4 Supervisor is notified of task completion in accordance with workplace procedures
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