This unit involves the skills and knowledge required to determine noise and vibration encountered in heating, ventilation and air conditioning/refrigeration (HVAC/R) applications.

It includes measuring sound, noise and vibration encountered in HVAC/R systems. It also includes working safely, using problem-solving procedures, applying appropriate theorems and providing interpretations derived from measurements and calculations and justification for such interpretations.

No 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 HVAC/R system to determine noise and vibration encountered in application

1.1

Work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures for a given work area are obtained and applied

1.2

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

1.3

Nature of the problem is obtained from documentation or from work supervisor to determine the scope of work to be undertaken

1.4

Advice is sought from the work supervisor to ensure the work is coordinated effectively with others

1.5

Sources of equipment and products required for HVAC/R work are established in accordance with workplace procedures

1.6

Tools, equipment and testing devices needed to carry out HVAC/R work are obtained and checked for correct operation and safety

2

Determine HVAC/R application noise and vibration measurements

2.1

WHS/OHS risk control work measures and workplace procedures are followed

2.2

Need to test or measure active HVAC/R systems is determined in accordance with WHS/OHS requirements and conducted in accordance with workplace safety procedures

2.3

HVAC/R systems are checked and isolated in accordance with WHS/OHS requirements and workplace procedures

2.4

Relevant technique or process methods are used to determine noise and vibration measurement encountered in HVAC/R application

2.5

Unexpected situations are dealt with safely in accordance with workplace procedures and with the approval of authorised person/s in a manner that minimises risk to personnel and equipment

2.6

Measurements are taken without damage to HVAC/R apparatus, circuits, the surrounding environment or services using sustainable energy practices with minimum waste and re-work

3

Document HVAC/R application noise and vibration measurements and calculations

3.1

WHS/OHS work completion risk control measures and workplace procedures are followed

3.2

Worksite is cleaned and made safe in accordance with workplace procedures

3.3

Justification for alternative approach to determine noise and vibrationmeasurements is documented and appropriate person/s notified in accordance with workplace procedures

3.4

Work completion is documented and appropriate person/s notified in accordance with workplace procedures

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:

identifying the dynamic characteristics of systems/materials and the effects due to different operating parameters

using established measurement methods

taking relevant measurements accurately

interpreting measured values appropriately

providing correct interpretation of data taken from measurements and calculations

dealing with unplanned events

applying problem solving procedures including using appropriate theorems

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

applying sustainable energy principles and practices

determining noise and vibration encountered in heating, ventilation and air conditioning/refrigeration (HVAC/R) applications.

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:

noise and vibration fundamentals, safe working practices and relevant standards, codes and regulations, including:

fundamentals of sound:

properties of sound: wavelength, amplitude, frequency, period, velocity, sound (intensity, pressure and power) and decibels

sound pressure level

sound power level

addition of sound levels

loudness and weighting networks

sound spectrum and octave bands

single value representation of sound spectrum

noise rating (NR) curves

sound meters

fundamentals of vibration:

terminology: spring-mass system, spring in series and/or parallel, stiffness, effective stiffness, viscous frictional coefficient, mass, period, frequency (angular, natural, damped and forced), amplitude, static deflection, damping ratio, damping factor and frequency ratio

simple harmonic motion (SHM)

damped vibration

forced vibration

maximum amplitude and resonance

transmissibility and isolation efficiency

vibration isolators

relevant HVAC/R manufacturer specifications

relevant job safety assessments or risk mitigation processes

relevant techniques, processes or measurement methods to obtain sound, noise and vibration data, including problem-solving procedures and appropriate theorems

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace 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 workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated 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 other simulations

relevant and appropriate materials, tools, equipment and personal protective equipment (PPE) 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.

Providing sound, noise and vibration measurements must include at least the following:

two HVAC/R applications

Electrotechnology

Refrigeration and air-conditioning