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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate knowledge of fan operating points for different configurations and influencing factors 
SAQA US ID UNIT STANDARD TITLE
120353  Demonstrate knowledge of fan operating points for different configurations and influencing factors 
ORIGINATOR
SGB Occupational Health and Safety 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 09 - Health Sciences and Social Services Preventive Health 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular-Fundamental  Level 5  Level TBA: Pre-2009 was L5  4 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This Unit Standard requires learners to be able to demonstrate knowledge to demonstrate knowledge of fan operating points for different configurations and influencing factors.

Learners credited with this Unit Standard are capable of:
  • Describing the specified requirements pertaining to a fan characteristic curve
  • Demonstrating knowledge and perform calculations pertaining to different fan configurations
  • Demonstrating knowledge and perform calculations pertaining to influencing factors
  • Performing calculations to determine the effect of fitting an evaseé 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    The Unit Standard outcomes and credits are based on the assumption that learners attempting this Unit Standard can already read, write and communicate at ABET 4/NQF Level 1 or equivalent. 

    UNIT STANDARD RANGE 
    Specified requirements include legal and site-specific requirements and are contained in one or more of the following documents:

    Legal requirements:
  • Mine Health & Safety Act, 1996 (Act No 29 of 1996), and Regulations
  • Occupational Health and Safety Act (Act No 85 of 1993)
  • Guideline for mandatory Codes of Practice

    Site-specific requirements:
  • Hazard Identification and Risk Assessments (HIRA)
  • Mandatory Codes of Practice
  • SANS documents
  • Occupational Health and Safety Risk Management Programme
  • Managerial Instructions
  • Company Standard Procedures
  • Standard Task Procedures
  • Risk Assessment Documentation
  • Working Guides
  • Manufacturers' specifications 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Describe the specified requirements pertaining to a fan characteristic curve. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The need for establishing fan characteristic curves is according to specified requirements. 

    ASSESSMENT CRITERION 2 
    The various methods and uses of fan speed control are discussed according to specified requirements. 

    ASSESSMENT CRITERION 3 
    The illustration of fans installed in true series or parallel and semi-series or parallel is in accordance with specified requirements. 

    ASSESSMENT CRITERION 4 
    The explanation of the effects of Natural Ventilation Pressure in a fan circuit is explained in accordance with specified requirements. 

    ASSESSMENT CRITERION 5 
    The effect on a fan's characteristics where there is either a density or speed change is explained in accordance with specified requirements. 

    SPECIFIC OUTCOME 2 
    Demonstrate knowledge and perform calculations pertaining to different fan configurations. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The operating points of each fan and the combined operating point are determined for fans in series according to specified requirements. 

    ASSESSMENT CRITERION 2 
    The operating points of each fan and the combined operating point are determined for fans in parallel according to specified requirements. 

    ASSESSMENT CRITERION 3 
    The operating points of each fan and the combined operating point are determined for fans in joint series and parallel according to specified requirements. 

    ASSESSMENT CRITERION 4 
    The operating points of each fan and the combined operating point are determined for fans in semi-parallel according to specified requirements. 

    ASSESSMENT CRITERION 5 
    The operating points of each fan and the combined operating point are determined for fans in semi-series according to specified requirements. 

    SPECIFIC OUTCOME 3 
    Demonstrate knowledge and perform calculations pertaining to influencing factors. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The calculations performed concerning changes in fan performance due to influencing factors are in accordance with specified requirements. 

    ASSESSMENT CRITERION 2 
    The changes in fan performance due to natural ventilation pressure are calculated in accordance with specified requirements. 

    ASSESSMENT CRITERION 3 
    The calculation of natural ventilation pressure from given data is done according to specified requirements. 

    SPECIFIC OUTCOME 4 
    Perform calculations to determine the effect of fitting an evaseé. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The change to a fan's operating point is determined where an evasé is fitted to a fan's discharge, according to specified requirements. 

    ASSESSMENT CRITERION 2 
    The change to a fan's operating point is determined where an evasé is fitted to a column's discharge, according to specified requirements. 

    ASSESSMENT CRITERION 3 
    The advantages and disadvantages of the above two scenarios are discussed in accordance with specified requirements. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner against this unit standard must be registered as an assessor with the relevant ETQA or an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable achievement of this unit standard must be accredited, as a provider, through the relevant ETQA by SAQA.
  • Moderation of assessment will be overseen by the relevant ETQA according the moderation guidelines in the relevant qualification and the agreed ETQA procedures. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    The following embedded knowledge is addressed in an integrated way in the unit standard:
  • Health and safety knowledge
  • Report writing
  • Legal and site-specific requirements 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Solve problems related to air flow in ventilation circuits with fans in different configurations and perform basic calculations. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team/group/organisation/community by accepting, interpreting and delegating instructions correctly, if and when required, in a context-appropriate manner. 

    UNIT STANDARD CCFO ORGANISING 
    Organise and manage themselves and their activities responsibly and effectively by meeting specified requirements, identifying hazardous, unhealthy and sub standard conditions, and recommending appropriate action where necessary. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, organise and critically evaluate information and interpret psychrometric data, calculate the fan duty and efficiency and recommend appropriate action. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematics and language skills in the modes of oral and written presentations to record and report analytical results. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically (showing responsibility towards the environment and health of others) to select the appropriate methods, formulae and instruments for performing ventilation airflow calculations. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recommending appropriate actions based on the evaluation of test results and reporting results to relevant designated persons, confirming that a specific observation, inference, action or decision can have an interrelated effect. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  79807   Further Education and Training Certificate: Occupational Hygiene and Safety  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  As per Learning Programmes recorded against this Qual 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    NONE 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.