UEENEEJ102A - Prepare and connect refrigerant tubing and fittings

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Unit code: UEENEEJ102A | Study level: TAFE
Credit points
N/A
Location
Industry
Sunshine
Werribee
Prerequisites
UEENEEE101A - Apply Occupational Health and Safety regulations, codes and practices in the workplace
(Or equivalent to be determined by unit coordinator)
Overview
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Overview

This unit covers the basic connection of refrigeration and air conditioning piping/tubing and fittings. It encompasses the safe use of hand, fixed and portable power tools for cutting, flaring, bending, swaging, silver brazing copper tube to copper tube, bundy tube and brass and steel fittings, measurement and reading drawings and diagrams.

Assessment

For Melbourne campuses

Assessment tasks will be designed to reinforce and extend knowledge and skill competence within set and controlled parameters in accordance with each unit’s learning outcomes and performance criteria requirements, including the setting of work based practical application tasks designed to provide evidence of competence outcomes, within periodic and scheduled timelines.

Evidence shall show an understanding of cutting, bending and joining refrigeration piping and tubing tools, equipment and techniques, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects:

T1 Piping

  • Refrigeration & water grade copper tube;
  • Maintaining cleanliness (always capped, do not blow out with mouth etc);
  • Soft and hard drawn tube;
  • Tubing applications (soft, hard, pair coil, water grade etc);
  • Tube qualities - diameter, wall thickness (gauge) and pressure ratings (R410A etc);
  • Pipe insulation (types - tube, slit tube, sheet etc and joining methods - glue, tape etc), and;
  • Other tube materials (Bundy, steel, aluminum, brass).

T2 Cutting

  • Cutting tools (Imps, normal & large pipe cutters, tube cutting rings etc);
  • Precautions while cutting (sharp burrs, sharp blades etc), and;
  • Deburring tools (reamers, deburrers etc).

T3 Bending

  • Bending tools (springs, levers, presses etc);
  • Precautions while bending (work hardening, collapsing etc), and;
  • Bending hard drawn tube - the process of annealing.

T4 Joining

  • Flare nuts (plain, short barrel, frost proof, reducing);
  • Flaring tools (flare block, eccentric with clutch for high pressure tube);
  • Precautions while flaring (deburred, length past block face, cleanliness);
  • Swaging tools (punch, flare block, expander etc);
  • Precautions while swaging (length past block face, tube shortening effect, cleanliness etc);
  • Other tube fittings (BSP to flare elbows, tees, unions, plugs, flare washers, Lokrings etc);
  • Thread sealants (tapes, pastes etc);
  • Access valves (Schrader, piercing, cut-away of service valve/s), and;
  • Precautions using access valves (refrigerant leakage, core removal, limitations on piercing valves etc).

T5 Soldering and brazing equipment

  • Gas types (oxy acetylene, air acetylene, propane, Mapp gas);
  • Hazards associated with their use (cylinder transport, remove regulator, oil & oxy = bang);
  • Personal safety (MSDS - oxy, acetylene, propane, MAPP gas);
  • Flash back arrestors;
  • Setting up equipment (fitting regulator, adjusting pressures, tip selection);
  • Igniting and flame types (flint guns, oxidising, neutral, carburising), and;
  • Care and maintenance of equipment (hoses, regulator, tips, cylinders, flash back arrestors).

T6 Silver solder

  • Types (yellow, brown, blue and their metal components);
  • Personal safety (MSDS - silver brazing alloys);
  • Flux and its use (dissimilar metals);
  • Personal safety (MSDS - flux), and;
  • Preparing surfaces (removing oxides, oils, applying flux).

T7 Soldering techniques

  • Dry nitrogen;
  • Personal safety (MSDS - nitrogen);
  • Applying dry nitrogen to a piping circuit;
  • Silver soldering copper to copper;
  • Silver soldering copper to dissimilar metals, and;
  • Annealing copper tube.

Required reading

The qualified trainer and assessor will provide teaching and learning materials as required in the form of workbooks produced by the Polytechnic and/or via the Polytechnic e-learning system.

As part of a course

This unit is studied as part of the following course(s):

Certificate II in Electrotechnology (Pre-vocational)
22499VIC | Certificate ii | Duration:

Refer to the course page for information on how to apply for the course. VU takes care to ensure the accuracy of this unit information, but reserves the right to change or withdraw courses offered at any time. Please check that unit information is current with the Student Contact Centre.

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