The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Scope of work: | must include interpretation of plans and specifications must include sizing and documenting layout of heated water supply and distribution systems for applications including residential, commercial, industrial and health may be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | architectural plans builder specifications fire rating of penetrations flue requirements owner requirements pipework identification specialist heated water use applications. |
Cost-benefit analysis: | compares the range of suitable materials and system choices available to enable cost-effective choices to be made without compromising the integrity of the project may include: design styles energy costs expected design life labour costs material costs safety factors speed of installation suitable materials system choices. |
Statutory and regulatory requirements must include: | Acts and regulations National Construction Code relevant Australian standards and codes, including AS/NZS3500 National plumbing and drainage local government and health department requirements. |
Manufacturer requirements may include: | material specifications heater maintenance and servicing provision for heater pressure and temperature discharge pump tables sizing tables recommended specific fixings for pipework technical and trade manuals. |
Desktop study may include collection and interpretation of data for design purposes from: | architectural and building plans developer plans other documents, including: applications brochures forms policies other reports as available. |
Performance requirements must include: | those established using relevant Australian standards, building codes and other relevant documents. |
Layout of pipework systems may include: | dead leg pressurised thermo convection circulating. |
Fittings and valves may include: | fittings: bends tees unions valves: backflow prevention cold water expansion isolating non-return, including high pressure non-return pressure limiting pressure relief strainers temperature control. |
Thermostatic mixing and tempering valves may include: | bimetallic types wax capsule. |
Circulating heated water supply system details may include: | circulating pump specification dead leg minimisation flow and return pipework circulation pipe insulation thermal convection circulating. |
Heat trace systems may include: | installation requirements running costs serviceability. |
Calculations for sizing water heaters may include: | coefficient of expansion daily flows energy consumption heat losses mixed temperatures peak demand recovery times size and quantity of heated water required standby versus continual flow tariffs water expansion. |
Methods for the control of expansion may include: | U-bends coiled loop lyre bend offset bends proprietary expansion control devices. |
Pipe support may include: | anchors bracket spacing corrosion protection hanging brackets material requirements provision for expansion saddles wall and ceiling brackets. |
Manifolding heated water units must include: | balanced flow conditions and valves pressure relief requirements. |
Water heaters: | may include: continuous flow heat transfer pressure storage systems open vented storage systems heated source may include: electricity gas heat pump solar solid fuel waste heat. |
Safe trays and overflows must include: | design discharge materials sizes. |
Materials may include: | pipe materials as specified, including: copper composite polymer other approved materials flue materials, including stainless steel ancillary material, including: air relief valve heaters fittings and fixtures insulation pumps valves. |
Jointing methods may include: | brazing compression electrofusion welding flaring mechanical joints threading. |
Insulation materials may include: | fibre glass foam metal sheathing rock wool other approved materials. |
Installation requirements must include: | fire rating of penetrations level of workmanship manufacturer-recommended specific fixings pipe support provision for expansion serviceability and access. |
Circulating systems may include: | approved pressure pipes and fittings balancing valves circulating pump and controls isolating valves thermo cycle temperature gauge pump sizing to meet calculated flow conditions. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resources may include: selecting appropriate material to ensure minimal environmental impact efficient use of material efficient energy usage/capital outlay comparison selection of energy efficient water heater water efficiency consideration of the Green Building Council of Australia rating scheme. |
Plans: | may include: axonometrics cross-sections details elevations isometrics schematics sections may be produced using: computer generation drawing equipment. |
Specification may include: | support jointing flow requirements manufacturer requirements materials residual pressures and temperature safety (WHS) specialised components testing valve selection water treatment workmanship. |
Testing may include: | air pressure defect inspection flue operation hydrostatic mains pressure performance quality assurance (QA) audit. |
Commissioning schedule may include: | balancing the system checking and flushing the system disinfection flow test flue operation leak check pressure test system certification system defects system functions as per design system purge temperature setting valve operation. |
Operation and maintenance manual may include: | as installed drawings results of commissioning test certification documentation heater details, settings and operations maintenance schedules manufacturer brochures and technical information valve function. |