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:

Join and install refrigerant piping

SAQA US ID	UNIT STANDARD TITLE
9389	Join and install refrigerant piping
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	9
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
116229	Join and install refrigerant piping	Level 2	NQF Level 02	9

PURPOSE OF THE UNIT STANDARD

Join and install refrigerant piping.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

Use of tools and identification of material, equipment and components used in refrigeration and air-conditioning.

UNIT STANDARD RANGE

Piping:

Soft copper piping between ?" (3mm) and ?" (20mm) diameter. Hand drawn copper piping between ?"(6mm) and 2?" (53mm) diameter. Steel piping up to ?" (6mm) diameter, as used for domestic, commercial and industrial refrigeration and air-conditioning equipment (excluding systems using ammonia as a refrigerant).

Joints:

Copper to copper joints including swayed joints. Copper to brass, copper to aluminum and copper to steel. Flared connections. Threaded connections. Flanged connections. Compression fittings.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

Form brazed joints

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Copper to copper brazed joints are made using a filler material that forms a strong mechanical joint, does not require the use of flux and melts below the melting point of copper.

ASSESSMENT CRITERION 2

2. Copper to brass joints are made with a filler material that bonds evenly with both metals, that melts below their melting points and forms a strong mechanical joint.

ASSESSMENT CRITERION 3

3. Joints involving steel are made with a filler material that does not combine with the steel to form iron phosphate.

ASSESSMENT CRITERION 4

4. Internal surfaces are inherently free of scale upon completion of the brazing process.

ASSESSMENT CRITERION 5

5. Filler material has penetrated the entire joint.

ASSESSMENT CRITERION 6

6. Joints are leak proof up to 2500 kPa.

SPECIFIC OUTCOME 2

Form non-brazed joints

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. Joints of similar or dissimilar materials are formed that are mechanically strong and leak-free up to 2500kPa, using mechanical connecting devices.

ASSESSMENT CRITERION 2

2. Joints of similar or dissimilar materials are formed that are mechanically strong and leak-free up to 2500kPa, using chemical bonding materials.

SPECIFIC OUTCOME 3

Install refrigerant pipes

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. All pipes are installed according to the drawing supplied.

ASSESSMENT CRITERION 2

2. All pipes are supported to prevent sagging.

ASSESSMENT CRITERION 3

3. All pipes are protected against abrasion where they pass through openings, touch one another or other pieces of equipment.

SPECIFIC OUTCOME 4

Ensure safe oil return

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. All pipes carrying vapour slope correctly and sufficiently to ensure proper oil return.

ASSESSMENT CRITERION 2

2. Vertical risers carrying vapour are downsized if indicated on the drawing.

ASSESSMENT CRITERION 3

3. Oil traps are inserted in strict accordance with the drawing.

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

Ability to:

Distinguish between soft copper pipe and hard drawn copper pipe.

Prevent oxides from forming on the inside surfaces during the brazing process.

Judge temperature-range signs of objects being brazed, so they do not over heat or melt.

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems:

Selecting correct tools and materials

UNIT STANDARD CCFO ORGANISING

Organise and manage myself and my activities:

Planning the work to be carried out

UNIT STANDARD CCFO COLLECTING

Collect, analyse, organise and critically evaluate information:

Reading and interpreting work drawings or sketches

UNIT STANDARD CCFO SCIENCE

Use science and technology effectively and critically:

Appropriate use of tools

Selecting the correct materials

UNIT STANDARD CCFO DEMONSTRATING

Demonstrate an understanding of the world as a set of related systems:

Understanding the hazards associated with the use of bracing equipment

UNIT STANDARD NOTES

This unit standard has been replaced by unit standard 116229, which is "Join and install refrigerant piping", Level 2, 9 credits.

Supplementary information:

All questions are answered and all work is done within a reasonable time.
Work to be carried out on a typical refrigeration installation, either indoors or outdoors.

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

	ID	QUALIFICATION TITLE	PRE-2009 NQF LEVEL	NQF LEVEL	STATUS	END DATE	PRIMARY OR DELEGATED QA FUNCTIONARY
Core	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.

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