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SOUTH AFRICAN QUALIFICATIONS AUTHORITY

REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE:

Demonstrate knowledge of water reticulation systems for air-conditioning and refrigeration installations

SAQA US ID	UNIT STANDARD TITLE
9403	Demonstrate knowledge of water reticulation systems for air-conditioning and refrigeration installations
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	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 does not replace any other unit standard and is not replaced by any other unit standard.

PURPOSE OF THE UNIT STANDARD

Assess and report on the operational functionality and physical state of repair of water piping systems for air-conditioning and refrigeration installations.

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING

Identify materials, piping, fitting and jointing methods and insulation materials.

Identify fixing methods for piping.

Interpretation of plant layout and component drawings.

Identify water system, its components, accessories and controls

Identify insulation methods and materials for piping.

UNIT STANDARD RANGE

Knowledge is only necessary of condenser water piping systems for refrigeration systems. For air-conditioning installations, knowledge of condenser water, chilled water and hot water piping systems is necessary.

Specific Outcomes and Assessment Criteria:

SPECIFIC OUTCOME 1

describe and sketch a typical condenser water piping system capable of maintaining a closely control

OUTCOME NOTES

1.1 The pump(s), valves and controls necessary, and the positioning of the sensors are shown on the sketch.

1.2 How all the components work together to control the temperature and circulation of the water is explained in the description.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

describe and sketch a typical condenser water piping system capable of maintaining a closely controlled supply water temperature to the condenser(s).

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 2

describe and sketch typical chilled water piping systems with more than one air-to-water heat exchan

OUTCOME NOTES

2.1 The pump(s), valves and controls, and other components necessary, and the positioning of sensors are shown on the sketch.

2.2 How all the components work together to control the proper flow of water through each heat exchanger and through the chiller at all load conditions is explained in the description.

2.3How any water lost is made up and how any air entering the system is removed is explained in the description.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

describe and sketch typical chilled water piping systems with more than one air-to-water heat exchanger, each equipped with 3-way control valves.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 3

describe and sketch a typical chilled water piping system with more than one air-to-water heat excha

OUTCOME NOTES

3.1 The pump(s), valves and controls necessary, and the positioning of sensors are shown on the sketch.
.
3.2 how all the components work together to control the proper flow of water through the heat exchangers and chiller at all load conditions is explained in the description.

3.2 How any water lost is made up and how any air entering the system is removed is explained in the description.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

describe and sketch a typical chilled water piping system with more than one air-to-water heat exchanger, each equipped with 2-way control valves.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 4

describe and sketch a typical hot water piping system with more than one air-to-water heat exchanger

OUTCOME NOTES

4.1 The pump(s), valves and controls necessary, and the positioning of sensors are shown on the sketch.
.
4.2 how all the components work together to control the proper temperature and circulation of the water throughout the system (but not within the heating vessel) at all load conditions is explained in the description.

4.2 How the water in the heating vessel is prevented from boiling the water at temperatures equivalent to its saturation temperature for its geographical location is explained in the description

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

describe and sketch a typical hot water piping system with more than one air-to-water heat exchanger, each equipped with 3-way control valves.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 5

assess the functionality of typical condenser water circuits by comparing their operation with my kn

OUTCOME NOTES

5.1 The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

5.2 How all the components work together to control the correct circulation and temperature of the water in the system under review is correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

assess the functionality of typical condenser water circuits by comparing their operation with my knowledge of typical condenser water circuits.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 6

assess the functionality of typical chilled water piping systems with more than one air-to-water hea

OUTCOME NOTES

6.1 The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

6.2 How all the components work together to control the proper flow of water through each heat exchanger and through the chiller at all load conditions is correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

assess the functionality of typical chilled water piping systems with more than one air-to-water heat exchanger, each equipped with 3-way control valves by comparing their operation with my knowledge of typical chilled water circuits of this type.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 7

assess the functionality of typical chilled water piping systems with more than one air-to-water hea

OUTCOME NOTES

7.1 The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

7.2 How all the components work together to control the proper flow of water through each heat exchanger and through the chiller at all load conditions is correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

assess the functionality of typical chilled water piping systems with more than one air-to-water heat exchanger, each equipped with 2-way control valves by comparing their operation with my knowledge of typical chilled water circuits of this type.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 8

assess the functionality of typical hot water piping systems with more than one air-to-water heat ex

OUTCOME NOTES

.1 The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

8.2 how all the components work together to control the proper temperature of water throughout the system (but not within the hot water vessel) at all load conditions is correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

assess the functionality of typical hot water piping systems with more than one air-to-water heat exchanger, each equipped with 3-way control valves by comparing their operation with my knowledge of typical hot water circuits of this type.

ASSESSMENT CRITERION NOTES

SPECIFIC OUTCOME 9

Describe and sketch a typical condenser water piping system.

OUTCOME NOTES

Describe and sketch a typical condenser water piping system capable of maintaining a closely controlled supply water temperature to the condenser(s).

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The pump(s), valves and controls necessary, and the positioning of the sensors are shown on the sketch.

ASSESSMENT CRITERION RANGE

Temperature control by condensing pressure or water temperature by means of bypass valves and/or fan control.

ASSESSMENT CRITERION 2

2. How all the components work together to control the temperature and circulation of the water is explained in the description.

ASSESSMENT CRITERION 3

3. The consequences of inadequate control are listed and explained.

SPECIFIC OUTCOME 10

Describe and sketch typical chilled water piping systems equipped with 3-way control valves.

OUTCOME NOTES

Describe and sketch typical chilled water piping systems with more than one air-to-water heat exchanger, each equipped with 3-way control valves.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The pump(s), valves and controls, and other components necessary, and the positioning of sensors are shown on the sketch.

ASSESSMENT CRITERION 2

2. How all the components work together to control the proper flow of water through each heat exchanger and through the chiller at all load conditions is explained in the description.

ASSESSMENT CRITERION 3

3. The need for balancing at each heat exchanger is stated and explained.

ASSESSMENT CRITERION 4

4. How any water lost is made up and how any air entering the system is removed is explained in the description.

ASSESSMENT CRITERION 5

5. The consequences of inadequate control are listed and explained.

SPECIFIC OUTCOME 11

Describe and sketch a typical chilled water piping system equipped with 2-way control valves.

OUTCOME NOTES

Describe and sketch a typical chilled water piping system with more than one air-to-water heat exchanger, each equipped with 2-way control valves.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The pump(s) valves and controls necessary, and the positioning of sensors are shown on the sketch.

ASSESSMENT CRITERION 2

2. How all the components work together to control the proper flow of water through the heat exchangers and chiller at all load conditions is explained in the description.

ASSESSMENT CRITERION 3

3. Methods of ensuring adequate water flow through the chiller are listed and explained.

ASSESSMENT CRITERION 4

4. How any water lost is made up and how any air entering the system is removed is explained in the description.

ASSESSMENT CRITERION 5

5. The effect of reduced water flow on chiller performance and safety is explained.

SPECIFIC OUTCOME 12

Describe and sketch a typical hot water piping system equipped with 3-way control valves.

OUTCOME NOTES

Describe and sketch a typical hot water piping system with more than one air-to-water heat exchanger, each equipped with 3-way control valves.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The pump(s), valves and controls necessary, and the positioning of sensors are shown on the sketch.

ASSESSMENT CRITERION 2

2. How all the components work together to control the proper temperature and circulation of the water throughout the system (but not within the heating vessel) at all load conditions is explained in the description.

ASSESSMENT CRITERION 3

3. How the water in the heating vessel is prevented from boiling the water at temperatures equivalent to its saturation temperature for its geographical location is explained in the description.

SPECIFIC OUTCOME 13

Assess the functionality of typical condenser water circuits.

OUTCOME NOTES

Assess the functionality of typical condenser water circuits by comparing their operation with specified performance.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERION 2

2. How all the components work together to control the correct circulation and temperature of the water in the system under review is correctly assessed compared to that expected in a correctly functioning system.

SPECIFIC OUTCOME 14

Assess the functionality of typical chilled water piping systems equipped with 3-way control valves.

OUTCOME NOTES

Assess the functionality of typical chilled water piping systems with more than one air-to-water heat exchanger, each equipped with 3-way control valves by comparing their operation with specified performance.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERION 2

2. How all the components work together to control the proper flow of water through each heat exchanger and through the chiller at all load conditions is correctly assessed compared to that expected in a correctly functioning system.

SPECIFIC OUTCOME 15

Assess the functionality of typical chilled water piping systems equipped with 2-way control valves.

OUTCOME NOTES

Assess the functionality of typical chilled water piping systems with more than one air-to-water heat exchanger, each equipped with 2-way control valves by comparing their operation with specified performance.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The individual operation of the pump(s), valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERION 2

SPECIFIC OUTCOME 16

Assess the functionality of typical hot water piping systems equipped with 3-way control valves.

OUTCOME NOTES

Assess the functionality of typical hot water piping systems with more than one air-to-water heat exchanger, each equipped with 3-way control valves by comparing their operation with specified performance.

ASSESSMENT CRITERIA

ASSESSMENT CRITERION 1

1. The individual operation of the pump(s) valves controls and sensors in the system under review are correctly assessed compared to that expected in a correctly functioning system.

ASSESSMENT CRITERION 2

2. How all the components work together to control the proper temperature of water throughout the system (but not within the hot water vessel) at all load conditions is correctly assessed compared to that expected in a correctly functioning system.

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 correct functioning of typical water piping systems for condenser chilled and hot water.

UNIT STANDARD DEVELOPMENTAL OUTCOME

N/A

UNIT STANDARD LINKAGES

N/A

Critical Cross-field Outcomes (CCFO):

UNIT STANDARD CCFO IDENTIFYING

Identify and solve problems:

Nature and extent of deviation from specified performance

Identify equipment and components

Determine correct equipment and accessories

UNIT STANDARD CCFO ORGANISING

Organize and manage myself and my activities:

Prepare, plan and select resources for assessing systems

UNIT STANDARD CCFO COLLECTING

Collect, analyse, organise and critically evaluate information:

Reading and interpreting instructions

UNIT STANDARD CCFO SCIENCE

Use science and technology effectively and critically:

Identification of equipment and accessories

UNIT STANDARD ASSESSOR CRITERIA

N/A

UNIT STANDARD NOTES

N/A

QUALIFICATIONS UTILISING THIS UNIT STANDARD:

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

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