This unit involves the skills and knowledge required to analyse the operating parameters of heating, ventilation and air conditioning (HVAC) air and hydronic systems.

It includes working safely, applying knowledge of operating parameters, gathering and analysing data, applying problem-solving techniques, and developing and documenting results and solutions for use in design work.

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.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

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

1

Prepare to analyse the operation of HVAC air and hydronic systems

1.1

WHS/OHS processes and 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

Operating analysis is determined from performance specifications, situation reports and consultations with relevant person/s

1.4

Activities are planned to meet scheduled timelines in accordance with workplace procedures and consultations with others involved in the work

1.5

Strategies are formed for solution development and implementation is carried out in accordance with workplace procedures

2

Analyse the operation of systems

2.1

WHS/OHS risk control measures and workplace procedures for carrying out the work are followed

2.2

Principles of HVAC air and hydronic systems operating parameters are applied to analytical solutions to refrigeration and air conditioning systems

2.3

Parameters, specifications and performance requirements in relation to HVAC air and hydronic systems are obtained in accordance with workplace procedures

2.4

Analysis of operating parameters is carried out to provide solution in accordance with workplace procedures

2.5

Unplanned events are dealt with safely in accordance with relevant industry standards and workplace procedures

2.6

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

3

Report on results of operation systems analysis and actions taken

3.1

Results of system operating analysis are evaluated to determine performance requirements in accordance with workplace procedures and performance specifications

3.2

Analysis, findings, calculations and assumptions are documented in accordance with workplace procedures

3.3

Analysis is reported to relevant person/s to determine relevant action in accordance with workplace procedures

3.4

Justification for findings and actions to be undertaken in relation to equipment is documented in relevant work/project and/or development records in accordance with relevant industry standards

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:

understanding the operating performance

forming effective strategies for analysing air conditioning systems performance

obtaining operating parameters, specifications and performance requirements appropriate to each situation

evaluating the results of the analysis

documenting analysis details of all findings, calculations and assumptions

documenting justification of actions to be implemented in accordance with professional standards

dealing with unplanned events

analysing the operation of heating, ventilation and air conditioning (HVAC) air and hydronic systems

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including using risk control measures

preparing to analyse the operation of HVAC air and hydronic systems.

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:

HVAC air systems, safe working practices and relevant standards, codes and regulations, including:

air distribution principles:

air diffuser selection

factors affecting the design of ductwork systems

types of ductwork systems

static, velocity and total pressure

laminar and turbulent flow

moody diagram

parameters that control cost

pressure loss:

friction and dynamic

colebook - White formula

in ducts and friction charts

in fittings and loss co-efficient

fitting selection criteria

diffuser pressure loss

system sizing:

velocity method

equal friction method

static regain method

balanced pressure drop method

circular to rectangular equivalent

standard duct sizes and gauges

balancing

heat and leakage losses:

heat gain/loss calculation

bare vs. insulated

leakage

overview of noise in duct systems:

noise sources in duct systems

attenuation

impact on design

methods of control

fans:

types and characteristics

fan laws

system effect

fan selection

fan and system curves

air systems:

dual and single duct constant volume

variable volume

induction units

multi-zone

diversity factors

HVAC systems

HVAC hydronic systems, safe working practices and relevant standards, codes and regulations, including:

systems operation

closed/open systems

pump head/lift and static head (high-rise building)

system friction losses

nett positive suction head

system curves

pumps:

types

selection criteria

performance characteristics

bladder tanks

coil characteristics

heat exchangers: plate, shell and tube, and tube in tube

flow measurements: types

flow switchers

builders: types and performance characteristics

cooling towers: elementary cooling thermodynamics and types

valves - flow control devices:

types and applications

throttling characteristics

flow measurements

selection and applications

piping systems:

balancing and commissioning

air venting

water treatment

vacuum breaking and air breaks

relevant industry standards

relevant job safety assessments or risk mitigation processes

relevant manufacturer specifications

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace quality, policies and procedures.

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 suitable workplace operational 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.

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.

Analysing operating parameters must include at least the following:

two different HVAC systems

Electrotechnology

Refrigeration and air-conditioning