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

Select power transmission systems and accessories for air-conditioning, refrigeration and ventilation equipment 
SAQA US ID UNIT STANDARD TITLE
13476  Select power transmission systems and accessories for air-conditioning, refrigeration and ventilation equipment 
ORIGINATOR
SGB Air-conditioning Refrigeration and Ventilation 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 06 - Manufacturing, Engineering and Technology Engineering and Related Design 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 5  Level TBA: Pre-2009 was L5  6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Registered" 		 2001-06-13  2004-06-13  SAQA 0836/01 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2005-06-13   2008-06-13  

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 
Select power transmission equipment suitable for air-conditioning, refrigeration and ventilation equipment from catalogues. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • ABET level 4 literacy.
  • Identify and state the application of belt drives, couplings, gearboxes and bearings.
  • Knowledge of the motor driven components in air-conditioning, refrigeration and ventilation equipment required. 
    		•

    UNIT STANDARD RANGE 
    For refrigeration and air-conditioning equipment. Belt transmissions, fixed and variable speed. Electronic drives, fixed coupling drives; magnetic coupling drives; fixed and variable speed. 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Assess the requirements of the transmission system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The requirements of the transmission system, in such terms as the kW power to be transmitted, the need to ever alter speed, the space available and economic considerations are assessed. 

    SPECIFIC OUTCOME 2 
    Decide on the most suitable power transmission system type to use on particular applications. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The transmission system selected meets the requirements of the job. 

    ASSESSMENT CRITERION 2 
    2. The initial cost and projected operating cost is in proportion to the initial cost and projected operating cost of the plant as a whole. 

    ASSESSMENT CRITERION 3 
    3. The benefit to the owner in terms of initial cost and/or total overall cost, and efficient operation of the plant for the projected life of the plant is optimised. 

    ASSESSMENT CRITERION 4 
    4. The consequences of over and under design of the power transmission system are listed and explained. 

    SPECIFIC OUTCOME 3 
    Select power transmission system capable of delivering necessary power to drive the plant. 
    OUTCOME NOTES 
    Select the power transmission system capable of delivering the necessary power to drive the plant at its maximum design capacity continuously. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The power transmission selected is capable of handling the maximum design starting and running load of the plant continuously without suffering failure. 

    ASSESSMENT CRITERION 2 
    2. The selected equipment is capable of handling a sustained load of 110% of the design full load for 1 hour before failing. 

    SPECIFIC OUTCOME 4 
    Motivate the use of the recommended power transmission. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The motivation is in the form of a written report and gives reasons for the selection by including such things as cost / benefit, reliability and availability of spares. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
    Any person wishing to be assessed against this unit standard may apply to an assessment agency, assessor or provider institution accredited by the relevant ETQA, who may appoint a moderator to be present at the assessment.

    The assessor must have knowledge and experience of air-conditioning or refrigeration. 

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • The types of power transmission equipment available and their suitability for various applications.
  • How to calculate the power to be transmitted to drive the load.
  • How to avoid over or under-sizing the transmission. 
    		•


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems
  • Determining drive requirements and selecting correct components and accessories 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information
  • Reading and interpreting manufacturer`s selection procedure 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • Write a report 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • Determine operating parameter and applying these correctly 
    		•

    UNIT STANDARD CCFO CONTRIBUTING 
    Learner and societal development
  • Skills are applicable to a variety of trades 
    		•

    UNIT STANDARD NOTES 
  • Catalogues from various manufacturers shall be made available during assessment.
  • Assessment can be done by means of a written test. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  20722   National Diploma: Air Conditioning, Refrigeration and Ventilation  Level 5  Level TBA: Pre-2009 was L5  Passed the End Date -
    Status was "Registered"     		 2004-06-13  MERSETA 


    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.