Elements and Performance Criteria

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
HVAC/R control system
HVAC/R control systems hardware and environmental requirements may include control systems in:
industrial refrigeration systems
commercial refrigeration systems
hydronic systems
automatic controls
food storage technology
Building management system HVAC/R control systems
Building management system HVAC/R control systems may include:
human-machine interfaces (HMI)
web servers, network topology and bus systems
protocols
system or network controllers
programmable logic controllers (PLCs)
terminal unit controllers for major plant components, such as boilers and HVAC/R central plant air handlers, chilled and hot water valves, air dampers, supply fans and lighting
analog and digital I/O, interfaces and actuators, including electrical, electronic, pneumatic and hydraulic devices
remote control systems, including ethernet options
interfaces with other controlled systems, such as fire, security, and lighting
Analog or digital I/O
Analog or digital I/O may include:
inputs, such as temperatures, humidity, pressure, current flow and air flow
analog inputs, including temperature, humidity and pressure sensors transmitting 4-20 mA or 1-10 V signals
digital inputs, such as volt-free switches or relays or 24 VDC/AC and pneumatic/electronic interfaces
analog outputs, including variable frequency speed drives, hot or chilled water proportional valves responding to a set-point difference or a damper setting
digital outputs to switch lights, valves or motor relays on or off, including alarms
special I/O include:
alarms for limiting condition or status indication, such as the monitoring of carbon monoxide levels or low motor current
pneumatic and hydraulic sensor and actuator interfaces
Sustainability
Sustainability is used to mean the entire sustainable performance of the organisation/plant, including:
meeting all regulatory requirements
conforming to all industry covenants, protocols and best practice guides
minimising ecological and environmental footprint of process, plant and product
maximising economic benefit of process plant and product to the organisation and the community
minimising the negative WHS impact on employees, community and customer
Appropriate technical and professional assistance
Appropriate technical and professional assistance may include:
technical support and advice relating to elements which have intrinsic dangers, such as:
high pressure
energised fluid vessels
high temperatures and heat energy capacity
switch boards, electric motors and wiring with high current and voltages above extra low voltage
professional support for technologies, such as:
specialist electric motor drives and controllers
specialist materials, plastics, metal alloys and nano materials
special processes, alloy welding, heat treatment, sealing and fastening
WHS, regulatory requirements and enterprise procedures

WHS, regulatory requirements and enterprise procedures may include:
WHS Acts and regulations
relevant standards
codes of practice from Australian and overseas engineering and technical associations and societies
risk assessments
registration requirements
safe work practices
state and territory regulatory requirements
Standards and codes
Standards and codes refer to all relevant Australian and international standards and codes applicable to a particular task

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
A person who demonstrates competency in this unit must be able to coordinate the servicing, fault-finding and optimisation of HVAC/R control systems.This includes working individually or as part of a team on analysis and optimisation technical tasks.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
Assessors must be satisfied that the candidate can competently and consistently:
communicate HVAC/R servicing and fault-finding tasks and requirements to others
identify relevant WHS, other regulatory requirements, standards and codes
investigate sustainability implications of HVAC/R control systems
assess HVAC/R control system and hardware, including building management system control systems
use appropriate analysis and simulation software and validation techniques
review thermal loads, hardware, energy options, tariffs, consumption, benchmarks and comparative tariffs
map and monitor control system, I/O, hardware and energy use
optimise HVAC/R control system for seasonal and load cycles
measure control system performance
develop optimal control diagram and settings
report and document results.
Context of and specific resources for assessment
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, then a simulated working environment must be used where the range of conditions reflects realistic workplace situations.
The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team.
Where applicable, reasonable adjustment must be made to work environments and training situations to accommodate ethnicity, age, gender, demographics and disability.
Access must be provided to appropriate learning and/or assessment support when required. Where applicable, physical resources should include equipment modified for people with disabilities.
Method of assessment
Assessment must satisfy the endorsed Assessment Guidelines of the MEM05 Metal and Engineering Training Package.
Assessment methods must confirm consistency and accuracy of performance (over time and in a range of workplace relevant contexts) together with application of underpinning knowledge.
Assessment methods must be by direct observation of tasks and include questioning on underpinning knowledge to ensure correct interpretation and application.
Assessment may be applied under project-related conditions (real or simulated) and require evidence of process.
Assessment must confirm a reasonable inference that competency is not only able to be satisfied under the particular circumstance, but is able to be transferred to other circumstances.
Assessment may be in conjunction with assessment of other units of competency where required.
Guidance information for assessment
Assessment processes and techniques must be culturally appropriate and appropriate to the language and literacy capacity of the candidate and the work being performed.