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: 

Identify & state the application of belt drives, couplings, gearboxes & bearings used on air-conditioning, refrigeration & ventilation plants & recognize misaligned, mismatched & worn components 
SAQA US ID UNIT STANDARD TITLE
9422  Identify & state the application of belt drives, couplings, gearboxes & bearings used on air-conditioning, refrigeration & ventilation plants & recognize misaligned, mismatched & worn components 
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 2  NQF Level 02 
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 is replaced by: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
116233  Identify and state application of belt drives, couplings, gearboxes and bearings used on air-conditioning, refrigeration and ventilation plants and recognize misaligned, mismatched and worn components  Level 2  NQF Level 02  Complete 

PURPOSE OF THE UNIT STANDARD 
Identify and state the typical applications of belt drives, couplings, gearboxes and bearings used on air-conditioning, refrigeration and ventilation plants, Recognize and state the consequences of mismatched belts and pulleys, misaligned belt drives and couplings.

State the lubricating requirements of bearings. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
Identify components of air-conditioning, refrigeration and ventilation plants and where belt drives, couplings, gearboxes and bearings are used in these. 

UNIT STANDARD RANGE 
Gearboxes, tyre couplings, disc couplings, belt and coupling guards, v-belts, wedge or special profile (S.P.) belts, V-pulleys, S.P. pulleys, adjustable pitch pulleys, belt sizes, matched sets of belts, worn-out belts and pulleys, misaligned belt drives, misaligned couplings, mismatched combinations of V and S.P. belts and pulleys.

Ball bearings, roller bearings, journal bearings, flange bearings, self-aligning bearings, plummer blocks, pillow blocks and bronze bushes.

Typical applications are for fans, pumps and refrigeration compressors.

Lubrication systems include sealed, greased and oiled bearings. 

Specific Outcomes and Assessment Criteria: 

SPECIFIC OUTCOME 1 
Identify gearboxes, tyre couplings, disc couplings, etc. 
OUTCOME NOTES 
Identify gearboxes, tyre couplings, disc couplings, coupling and belt guards, V-belts, wedge and special profile (S.P.) belts, V-pulleys, S.P. pulleys, adjustable pitch pulleys, belt sizes, matched sets of belts, worn-out belts and pulleys, misaligned belt drives, misaligned couplings and mismatched combinations of V and S.P. belts. 

ASSESSMENT CRITERIA
 

ASSESSMENT CRITERION 1 
1. Gearboxes are correctly identified. 

ASSESSMENT CRITERION 2 
2. Tyre couplings and disc couplings are correctly identified. 

ASSESSMENT CRITERION 3 
3. V-belts are correctly identified from wedge belts. 

ASSESSMENT CRITERION 4 
4. V-belts on S.P. pulleys and/or S.P. belts on V-pulleys are correctly identified. 

ASSESSMENT CRITERION 5 
5. Belts and/or pulleys with unacceptable wear are pointed out first time. 

ASSESSMENT CRITERION 6 
6. Misaligned belt drives are identified. 

ASSESSMENT CRITERION 7 
7. Misaligned couplings are identified. 

ASSESSMENT CRITERION 8 
8. Belts of a given size are correctly selected from a mixed group of belts. 

ASSESSMENT CRITERION 9 
9. Matched sets are correctly assembled from a group of belts. 

ASSESSMENT CRITERION 10 
10. Belt guards are correctly identified as distinct from coupling guards. 

SPECIFIC OUTCOME 2 
State the typical applications of gearboxes, tyre couplings, disc couplings, etc. 
OUTCOME NOTES 
State the typical applications of gearboxes, tyre couplings, disc couplings, coupling and belt guards, V-belts, wedge or special profile (S.P.) belts, V-pulleys, S.P. pulleys, adjustable pitch pulleys. 

ASSESSMENT CRITERIA
 

ASSESSMENT CRITERION 1 
1. Typical applications of gearboxes are stated. 

ASSESSMENT CRITERION 2 
2. Typical applications of tyre couplings and disc couplings are stated. 

ASSESSMENT CRITERION 3 
3. Typical applications of V-belts are stated. 

ASSESSMENT CRITERION 4 
4. Typical applications of V-belts on S.P. pulleys and/or S.P. belts on V-pulleys are stated. 

SPECIFIC OUTCOME 3 
State the consequences of belts mismatched for length, for type, for pulley 

ASSESSMENT CRITERIA
 

ASSESSMENT CRITERION 1 
1. Belt matching for length and type stated is in compliance with the SABS standard and manufacturers' recommendations. 

ASSESSMENT CRITERION 2 
2. Consequences of mismatching belts for length and type on the life of the belts and pulleys are stated and explained and are in accordance with those stated by the manufacturers. 

ASSESSMENT CRITERION 3 
3. Belt and pulley combinations and compatibilities stated are in accordance with manufacturer's recommendations. 

ASSESSMENT CRITERION 4 
4. Consequences of mismatching belt and pulley combinations and compatibilities on the life of the belts and pulleys are stated and explained and are in accordance with those stated by the manufacturers. 

SPECIFIC OUTCOME 4 
State the consequences of misaligned belt drives and couplings 

ASSESSMENT CRITERIA
 

ASSESSMENT CRITERION 1 
1. Alignment tolerances for belt drives stated are in compliance with manufacturers' specifications. 

ASSESSMENT CRITERION 2 
2. Consequences of misalignment on the life of the belts, pulleys and other components are stated and explained and are in accordance with those stated by the manufacturers. 

ASSESSMENT CRITERION 3 
3. Alignment tolerances for couplings stated are in compliance with manufacturers' specifications. 

ASSESSMENT CRITERION 4 
4. Consequences of misalignment on the life of the couplings and other components are stated and explained and are in accordance with those stated by the manufacturers. 

SPECIFIC OUTCOME 5 
Identify and state typical application of various types of bearings 

ASSESSMENT CRITERIA
 

ASSESSMENT CRITERION 1 
1. Each type of bearing is correctly identified. 

ASSESSMENT CRITERION 2 
2. The typical application of all types of bearings are stated and explained. 

ASSESSMENT CRITERION 3 
3. The consequences of wrongly applied bearings are discussed. 

SPECIFIC OUTCOME 6 
Explain the different methods of libricating bearings 

ASSESSMENT CRITERIA
 

ASSESSMENT CRITERION 1 
1. Different methods of lubricating bearings are stated and explained. 

ASSESSMENT CRITERION 2 
2. The consequences of under or over-lubricating bearings are explained. 


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 necessity of installing and servicing equipment correctly in order to make it last longer.
The effect of proper lubrication of bearings on the life of the bearing.
Belt sizing tolerances, pulley types and sizes, consequences of mismatching and misalignment of belt and coupling drives. 


Critical Cross-field Outcomes (CCFO): 

UNIT STANDARD CCFO IDENTIFYING 
Identify and solve problems:
  • Selecting the correct belts, pulleys and couplings
  • Selecting lubrication methods for bearings 

  • UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically:
  • Identify different types of belts, pulleys, couplings and bearings and state methods of lubricating bearings
  • State consequences of faulty selection of equipment or lubrication systems 

  • UNIT STANDARD NOTES 
    This unit standard has been replaced by unit standard 116233, which is "Identify and state the application of belt drives, couplings, gearboxes and bearings used on air-conditioning, refrigeration and ventilation plants and recongnize misaligned, mismatched and worn components", Level 2, 6 credits.

    Supplementary information:

    This unit standard applies only to belts, pulleys, couplings and bearings commonly used on air-conditioning, refrigeration and ventilation equipment.
    Assessment is to be carried out in a working environment. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  20719   National Certificate: Air Conditioning, Refrigeration and Ventilation  Level 2  NQF Level 02  Passed the End Date -
    Status was "Registered" 
    2004-06-13  Was MERSETA until Last Date for Achievement 


    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.