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. Bold italicised wording, if used in the performance criteria, is detailed below. 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.
Scope of work may include:
interpreting plans and specifications
sizing and documenting layout for air conditioning and ventilation systems, including residential and commercial systems
new projects or an existing structure being renovated, extended, restored or maintained.

Design requirements must include:
architectural plans
building specifications
fire safety
National Construction Code
owners
tenants
air-flow requirements and sizing of duct work.

Specific use conditions may include:
age and activity of occupants
computer requirements
food preparation
smoke exhaust
wet-bulb and dry-bulb temperature and humidity.

Psychometric evaluation may include:
absolute, specific and relative humidity
air composition
air properties, including:
density
expansion coefficient
kinematic viscosity
Prandtl number
specific heat
temperature
thermal conductivity
altitude, density and volume
determination of the air condition using a psychometric or Mollier chart, showing:
dewpoint temperature
dry-bulb temperature
enthalpy
humidity ratio
relative humidity
specific volume
wet-bulb temperature.

Calculation of heat loads must include:
assessment of factors affecting heat load, including:
building materials
insulation
number of personnel
number of windows
room dimensions
usage
weather effects
using:
calculations and computer software systems
heat load calculation methods and formulas.

Building heat losses may include:
construction materials
insulation materials
maintaining plenum
occupancy
room sizes.

Desktop study may include collection and interpretation of data for design purposes in:
architectural and building plans
developer plans
manufacturer data
documents:
applications
brochures
forms
policies
other reports as available.

Legislation, standards and other relevant documentation is to be according to commonwealth, state and territory legislation and regulations and may include:
WHS requirements, such as:
growth and distribution of Legionella pneumophila bacteria and other water and airborne infectious bacterial agents
handling of materials, including hazardous materials and substances
hazard control
organic and inorganic contaminants
personal protective clothing (PPE) and equipment
use of first aid equipment
use of tools and equipment
workplace environment and safety
environmental requirements, including water quality management, which may include the breeding of mosquitoes
quality assurance requirements, including:
AS1100 Technical drawing materials
AS/NZS1668 Ventilation systems: Parts 1 and 2
AS/NZS1677 Refrigerating systems
AS/NZS 3666 Handling microbial systems
Environment Protection Authority (EPA)
internal company quality assurance policy and risk management strategy
International Standards Organisation
site safety plan
workplace operations and procedures
specifications and operational manuals for:
commissioning and testing
components installation
fittings
manufacturer specifications, literature and data
materials
pumps
systems
valves.

Specifications may include:
air-flow requirements
equipment selection
fire safety
jointing
manufacturer requirements
materials
safety (WHS)
specialised components
support
testing
workmanship.

Plans:
may include:
axonometrics
cross-sections
details
elevations
isometrics
schematics
sections
may be produced using:
computer generation
drawing equipment.

Design and sizing:
may include designs that are prescriptive and include detail relating to:
cost
materials and quality of work
milestones
nominated subcontractors
provision of on-site facilities and site access
quality assurance
space allowances
standard procedures
work schedules
design parameters must include:
client requirements
legislative requirements
WHS requirements
user requirements in relation to zoning
design and sizing may be produced using:
computer generation
drawing equipment
with reference to calculations, tables, regulations and manufacturer specifications.

Applications may include:
amenities
basement carpark
food preparation
residential and commercial premises.

Sustainability principles and concepts:
cover the current and future social, economic and environmental use of resources
may include:
selecting appropriate material to ensure minimal environmental impact
efficient use of material
efficient energy usage/capital outlay comparison.

Tests and testing equipment must include:
air pressure
air velocity
air volume
humidity
Pitot tubes
sound power levels
temperature.

Testing may include:
air flow
climate control
defect inspection
inspection checklist
performance quality assurance (QA) audit.

Commissioning schedule may include:
acoustic performance
balancing
system certification
check for foreign material
leak check
system defects
system functions as per design.

Operation and maintenance manual may include:
as installed drawings
certification documentation
results of commissioning test
maintenance schedules
manufacturer brochures and technical information
regular water quality testing
system operation.

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
This unit of competency could be assessed in the workplace or a close simulation of the workplace environment providing that simulated or project-based assessment techniques fully replicate plumbing and services workplace conditions, materials, activities, responsibilities and procedures.
This unit of competency could be assessed by:
developing an air conditioning and ventilation system for a given project, including the schedule of works and job specification
preparing a graphical presentation of an air conditioning or ventilation system solution with specifications.

Critical aspects for assessment and evidence required to demonstrate competency in this unit
A person who demonstrates competency in this unit must be able to as a minimum, provide evidence of the ability to:
design, size and document the layout details for an air conditioning and ventilation system for a 10 storey residential building with ground floor shops and basement car park
evaluate and document design parameters to relevant Australian standards, codes, regulatory, client and manufacturer requirements for system components, including:
air conditioning units
ducting systems
controls
fans
zones
develop an appropriate checklist for tests to be carried out on the system, including formulas required to carry out an air balance
conduct tests, record and evaluate test results, and prepare a report
prepare testing and commissioning schedules for air conditioning and ventilation systems
prepare operation and maintenance manuals for air conditioning and ventilation systems
apply sustainability principles and concepts throughout the air conditioning and ventilation system design
communicate with others to ensure safe and effective workplace operations.

Context of and specific resources for assessment
This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints.
Assessment of essential underpinning knowledge will usually be conducted in an off-site context.
Assessment is to comply with relevant regulatory or Australian standards’ requirements.
Resource implications for assessment include:
an induction procedure and requirement
realistic tasks or simulated tasks covering the minimum task requirements
relevant specifications and work instructions
tools and equipment appropriate to applying safe work practices
support materials appropriate to activity
workplace instructions relating to safe work practices and addressing hazards and emergencies
material safety data sheets
research resources, including industry-related systems information.
Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources, and the provision of appropriate assessment support.

Method of assessment
Assessment methods must:
satisfy the endorsed Assessment Guidelines of the Construction, Plumbing and Services Training Package
include direct observation of tasks in real or simulated work conditions, with questioning to confirm the ability to consistently identify and correctly interpret the essential underpinning knowledge required for practical application
reinforce the integration of employability skills with workplace tasks and job roles
confirm that competency is verified and able to be transferred to other circumstances and environments.
Validity and sufficiency of evidence requires that:
competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace
where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice, with a decision on competency only taken at the point when the assessor has complete confidence in the person's demonstrated ability and applied knowledge
all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence.
Assessment processes and techniques should as far as is practical take into account the language, literacy and numeracy capacity of the candidate in relation to the competency being assessed.
Supplementary evidence of competency may be obtained from relevant authenticated documentation from third parties, such as existing supervisors, team leaders or specialist training staff.