20591 Braze Refrigerator Pipe Work in Electrical Appliance Servicing

20591 version 2 Page 1 of 4

Braze refrigerator pipe work in electrical appliance servicing

Level 3

Credits 3

Purpose This unit standard covers the techniques required to braze refrigerator pipe work in a safe manner and is intended for use in the training of electrical service technicians.

People credited with this unit standard are able to: – identify the sources and nature of welding and brazing hazards, and describe obligations under the Health and Safety in Employment Act 1992; – describe and demonstrate safe use of brazing equipment; and – braze refrigerator pipe work.

Subfield Electrical Engineering

Domain Electrical Appliance Servicing

Status Registered

Status date 20 June 2006

Date version published 20 June 2006

Planned review date 31 December 2011

Entry information Open.

Accreditation Evaluation of documentation and visit by NZQA and industry.

Standard setting body (SSB) ElectroTechnology Industry Training Organisation

Accreditation and Moderation Action Plan (AMAP) reference 0003 This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.

Special notes

1 Electrical safety and proper workshop practices are to be maintained at all times.

Ó New Zealand Qualifications Authority 2018 20591 version 2 Page 2 of 4

2 References Health and Safety in Employment Act 1992; Hazardous Substances and New Organisms Act 1996; and their subsequent amendments and replacements; BOC Gases New Zealand Limited, Material Safety Data Sheets, available at http://www.boc.co.nz; NZS 4781:1973 Code of practice for safety in welding and cutting.

3 Range oxy-acetylene or oxy-liquefied petroleum gas (LPG).

4 Definition Industry practice – those practices, which competent practitioners within the industry recognise as current industry best practice.

Elements and performance criteria

Element 1

Identify the sources and nature of welding and brazing hazards, and describe obligations under the Health and Safety in Employment Act 1992.

Performance criteria

1.1 Welding and/or brazing hazards and their sources are identified.

Range burns (radiation, body), fume, asphyxiation, noise, hard and/or hot particles, chemical (cleaning, pickling and passivating agents), dust.

1.2 The worksite is checked for potential hazards.

Range may include – confined space, presence of flammable and/or explosive materials or containers, defective equipment, hot metal, hard and/or hot particles.

1.3 The obligations of employees under the Act are outlined.

Range responsibility for their own health and safety, responsibility for ensuring their actions do not harm anyone else.

1.4 The obligations of employers under the Act as they pertain to the welding industry are outlined.

Range elimination, isolation, or minimisation of welding hazards.

1.5 Personal protective equipment is identified to suit the worksite requirements for the hazards present.

Range overalls, boots, gloves, apron, eye protection, ear protection, face masks.

Element 2

Describe and demonstrate safe use of brazing equipment.

2.1 The operation of brazing equipment is described.

Range equipment – cylinders, flashback arrestors, regulators, hoses, protective equipment, blow pipe.

2.2 ‘O’ ring maintenance and tip cleaning procedures are described and demonstrated.

2.3 Set up procedure is described and demonstrated in accordance with industry practice.

2.4 Lighting up procedures are described and demonstrated in accordance with industry practice.

2.5 Flame types, their purpose, and precautions to be observed with each are described.

Range carburising, neutral, oxidising.

2.6 Shutting down and storage procedure is described and demonstrated in accordance with industry practice.

2.7 Safety practices are described.

Range protection, ventilation, cleaning chemicals and equipment, caustic fumes, gas pressures.

Element 3

Braze refrigerator pipe work.

Range copper to copper, copper to steel, copper to brass; using Easyflo, Silfos, brass, and other appropriate fluxes.

3.1 Pipe ends are prepared.

Range swage, ream, wire brush, emery cloth, chemically.

3.2 Rods, flux, and tips are selected to match the application.

3.3 The completed joint is neat with minimal component distortion.

Range joint appearance, capillary action, finish, strength, ductility.

3.4 Brazed pipe work is flushed and pressure tested in accordance with appliance manufacturer’s instructions, and any defects are corrected.

Please note

Providers must be accredited by the Qualifications Authority, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by the Qualifications Authority before they can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.

Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact the ElectroTechnology Industry Training Organisation [email protected] if you wish to suggest changes to the content of this unit standard.

Ó New Zealand Qualifications Authority 2018