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: 

Install and service power transmission systems for air-conditioning, refrigeration and ventilation equipment 
SAQA US ID UNIT STANDARD TITLE
9393  Install and service power transmission systems 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 3  NQF Level 03  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 is replaced by: 
US ID Unit Standard Title Pre-2009 NQF Level NQF Level Credits Replacement Status
116713  Install and service power transmission systems for air-conditioning, refrigeration and ventilation equipment  Level 3  NQF Level 03  6   

PURPOSE OF THE UNIT STANDARD 
Installing and service belt drives and couplings, with a power transferring capacity of up to 25kW, which are commonly applied to air-conditioning, refrigeration and ventilation equipment. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
Use hand tools and measuring instruments used in the refrigeration, air-conditioning and ventilation trades. Identify belt drives, couplings and gearboxes used on air-conditioning, refrigeration and ventilation plants and recognise misaligned, mismatched and worn components. 

UNIT STANDARD RANGE 
Only drives and couplings fitted to motors up to 25kW are to be considered.

The installation and servicing of:
Single and multiple belt applications with V-belts, wedge belts and special profile belts.
Tyre and disc couplings.

Alignment by mechanical means only. 

Specific Outcomes and Assessment Criteria: 

SPECIFIC OUTCOME 1 
Install and align belt drives. 
OUTCOME NOTES 
1.1 The pulleys and belts selected are as specified

1.2 The pulleys and belts are checked for unacceptable wear.

1.3 The motor, driven machine and the belt drive are installed to satisfy their intended function and are secured in accordance with specifications.

1.4 All bolts and screws are tightened correctly.

1.5 Tools were used and applied correctly.

1.6 All safety precautions were applied

1.7 The consequences of installing the wrong pulleys or belts or wrong alignment are explained.
1.8 The belts are fitted and tensioned according to specifications.
1.9 The drive is aligned in accordance with specifications.
Range: Angular and parallel alignment. 
OUTCOME RANGE 
Range: Angular and parallel alignment.
Range: pulley and belt size and type, shaft sizes, number and type of belts, belts are a matched set.. 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. The pulleys and belts selected are as specified. 
ASSESSMENT CRITERION RANGE 
Pulley and belt size and type, shaft sizes, number and types of belts, belts are a matched set.
 

ASSESSMENT CRITERION 2 
2. The pulleys and belts are checked for unacceptable wear. 

ASSESSMENT CRITERION 3 
3. The motor, driven machine and the belt drive are installed to satisfy their intended function and are secured in accordance with specifications. 

ASSESSMENT CRITERION 4 
4. All bolts and screws are tightened correctly. 

ASSESSMENT CRITERION 5 
5. Tools are used and applied correctly. 

ASSESSMENT CRITERION 6 
6. All safety precautions are applied. 

ASSESSMENT CRITERION 7 
7. The consequences of installing the wrong pulleys or belts or wrong alignment are explained. 

ASSESSMENT CRITERION 8 
8. The belts are fitted and tensioned according to specifications. 

ASSESSMENT CRITERION 9 
9. The drive is aligned in accordance with specifications. 
ASSESSMENT CRITERION RANGE 
Angular and parallel alignment.
 

SPECIFIC OUTCOME 2 
Install and align couplings. 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. The coupling selected is as specified. 
ASSESSMENT CRITERION RANGE 
Coupling size and type, shaft sizes.
 

ASSESSMENT CRITERION 2 
2. The coupling is checked for unacceptable wear. 

ASSESSMENT CRITERION 3 
3. The coupling is correctly installed and all bolts and screws are tightened according to specifications. 

ASSESSMENT CRITERION 4 
4. Tools are used and applied correctly. 

ASSESSMENT CRITERION 5 
5. All safety precautions are applied. 

ASSESSMENT CRITERION 6 
6. The drive is aligned correctly according to specifications. 
ASSESSMENT CRITERION RANGE 
Angular and parallel alignment.
 

SPECIFIC OUTCOME 3 
Service belt and couplings drives. 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. The pulleys, belts or couplings are checked and found to be within specified wear limits. 

ASSESSMENT CRITERION 2 
2. The angular and parallel alignment is checked, compared with manufacturer's specifications and corrected if required. 

ASSESSMENT CRITERION 3 
3. The belt tension is checked and corrected, if required, according to specifications. 

ASSESSMENT CRITERION 4 
4. The belts are replaced as a matched set in multi-belt applications. 

ASSESSMENT CRITERION 5 
5. The drive guard is checked for safety and re-installed correctly. 

ASSESSMENT CRITERION 6 
6. All safety precautions are observed. 

ASSESSMENT CRITERION 7 
7. The consequences of faulty alignment and tensioning are stated and discussed. 
ASSESSMENT CRITERION RANGE 
Belt, pulley and coupling wear, noise, vibration, bearing damage.
 

ASSESSMENT CRITERION 8 
8. Service records are completed. 


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 of components and functions of drives and couplings.
Consequences of sub standard workmanship.
Work instructions and procedures. 


Critical Cross-field Outcomes (CCFO): 

UNIT STANDARD CCFO IDENTIFYING 
Identify and solve problems
  • Nature and extent of deviation from specified performance is diagnosed and rectified
  • Determine possible malfunctions 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information
  • Determine the condition of installed drives
  • Reading and interpreting manufacturer`s instructions 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively
  • Present oral and written reports 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically
  • Appropriate use of tools and instruments for particular purposes 
    		•

    UNIT STANDARD NOTES 
    This unit standard has been replaced by unit standard 116713, which is "Install and service power transmission systems for air-conditioning, refrigeration and ventilation equipment", Level 3, 6 credits.

    Aligning drives and couplings by means of laser equipment is not included in this unit standard.

    Manufacturer`s instructions or specifications regarding the drives and belts and/or company procedures shall be available to the learner during assessment. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Elective  20720   National Certificate: Air-Conditioning, Refrigeration and Ventilation  Level 3  NQF Level 03  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.