SAQA

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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	8
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	6

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.

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