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 types of air-conditioning systems 
SAQA US ID UNIT STANDARD TITLE
9456  Select types of air-conditioning systems 
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  10 
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 the most suitable and cost effective air-conditioning system for comfort and industrial applications. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
  • Interpret architectural drawings and sketches.
  • Name the commonly applied air-conditioning systems, explain their application and operation and identify and explain the operation of the control devices and control systems required.
  • Calculate the cooling requirements for air-conditioning applications
  • Compile and appraise a control sequence description.
  • Calculate the running cost of a refrigeration or air-conditioning system.
  • Design air distribution systems for air-conditioning systems.
  • Demonstrate knowledge of the following:
  • Legal matters pertaining to air-conditioning and refrigeration installations, comfort conditions for humans, air filtration systems, the vapour compression refrigeration cycle, capacity control systems, vibration control systems, water piping systems for refrigeration and air-conditioning systems, and building construction and building services.
  • Generate a technical report. 
    		•

    UNIT STANDARD RANGE 
    The following commonly used systems are to be considered:
  • Direct expansion systems (unitary and split).
  • All-air systems, chilled water systems
  • Heat pump systems. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Interpret and evaluate the design brief. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. The design brief is read and interpreted correctly. 

    ASSESSMENT CRITERION 2 
    2. The physical aspects of the space or building are examined. 

    ASSESSMENT CRITERION 3 
    3. All requirements in the brief are critically evaluated with relevance to economic aspects, the client's wishes, and suitability. 

    ASSESSMENT CRITERION 4 
    4. The orientation and construction of the building is evaluated. 

    ASSESSMENT CRITERION 5 
    5. Recommendations are made to the client. 

    ASSESSMENT CRITERION 6 
    6. The consequences of wrong interpretation of the design brief are listed and explained. 

    SPECIFIC OUTCOME 2 
    Carry out a fundamental analysis. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. All fundamentals required to select a system are considered. 
    ASSESSMENT CRITERION RANGE 
    Investor's financial capacity and investment objective,
    : The purpose, location, orientation and shape of the space or building,
    : Diversity of internal loads,
    : Capability for storage of heat gains,
    : Necessity and capacity for pre-cooling

    Physical aspects of space or building to accommodate equipment, ducting switchboards, etc.
    : Zoning and flexibility requirements.
    : Availability of electrical power and water.
    : Character, nature and behavior of the cooling/heating load under part load conditions.
    : Type and accuracy of control required.
     

    ASSESSMENT CRITERION 2 
    2. The reasons for considering the above fundamentals are explained and discussed. 

    ASSESSMENT CRITERION 3 
    3. Consequences of not considering all fundamentals are named and explained. 

    SPECIFIC OUTCOME 3 
    Select a system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. At least three systems are selected for consideration. 

    ASSESSMENT CRITERION 2 
    2. Systems are compared and contrasted. 

    ASSESSMENT CRITERION 3 
    3. Costs estimates for the systems are done. 

    ASSESSMENT CRITERION 4 
    4. Final recommendations are made. 

    ASSESSMENT CRITERION 5 
    5. Reasons for the final selection are listed and discussed. 

    ASSESSMENT CRITERION 6 
    6. Consequences of selecting the wrong system are named and discussed. 

    SPECIFIC OUTCOME 4 
    Write a specification. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    1. A specification is written. 

    ASSESSMENT CRITERION 2 
    2. All relevant information is included in the specification. 
    ASSESSMENT CRITERION RANGE 
    Type of system, design details, operating parameters, equipment selection, control details, owing costs.
     


    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 
    Names and functions of parts and components of air-conditioning and refrigeration systems
    The purpose of an air-conditioning system
    The effect of the environment on comfort conditions for humans
    The effect of environmental conditions on industrial processes
    Consequences of selecting a system, which cannot provide required conditions
    Occupational health and safety act (OHSA) requirements in relation to air-conditioning and refrigeration 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems
  • Interpret drawings in order to obtain information required to solve problems
  • Select air-conditioning systems 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Organize and manage myself and my activities
  • Select information from drawings in order to determine space availability 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyze, organize and critically evaluate information
  • Reading and interpreting drawings and design brief 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • Communicate with client
  • Write a technical report 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • By understanding the processes involved
  • Selecting the most suitable system for the stated application 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems
  • Be aware of the effect of the environment on human comfort 
    		•

    UNIT STANDARD NOTES 
    Only air-conditioning systems commonly applied in South Africa are to be considered. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  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.