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 specificationsmust include sizing and documenting layout of heated water supply and distribution systems for applications including residential, commercial, industrial and healthmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Design requirements must include: | architectural plansbuilder specificationsfire rating of penetrationsflue requirementsowner requirementspipework identificationspecialist 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 projectmay include:design stylesenergy costsexpected design lifelabour costsmaterial costssafety factorsspeed of installationsuitable materialssystem choices. |
Statutory and regulatory requirements must include: | Acts and regulationsNational Construction Coderelevant Australian standards and codes, including AS/NZS3500 National plumbing and drainagelocal government and health department requirements. |
Manufacturer requirements may include: | material specificationsheater maintenance and servicingprovision for heater pressure and temperature dischargepump tablessizing tablesrecommended specific fixings for pipeworktechnical and trade manuals. |
Desktop study may include collection and interpretation of data for design purposes from: | architectural and building plansdeveloper plansother documents, including:applicationsbrochuresformspoliciesother 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 pressurisedthermo convectioncirculating. |
Fittings and valves may include: | fittings:bendsteesunionsvalves:backflow preventioncold water expansionisolatingnon-return, including high pressure non-returnpressure limitingpressure reliefstrainerstemperature control. |
Thermostatic mixing and tempering valves may include: | bimetallic typeswax capsule. |
Circulating heated water supply system details may include: | circulating pump specificationdead leg minimisationflow and return pipeworkcirculationpipe insulationthermal convection circulating. |
Heat trace systems may include: | installation requirementsrunning costsserviceability. |
Calculations for sizing water heaters may include: | coefficient of expansiondaily flowsenergy consumptionheat losses mixed temperatures peak demandrecovery timessize and quantity of heated water requiredstandby versus continual flowtariffs water expansion. |
Methods for the control of expansion may include: | U-bendscoiled looplyre bendoffset bendsproprietary expansion control devices. |
Pipe support may include: | anchorsbracket spacingcorrosion protectionhanging bracketsmaterial requirementsprovision for expansionsaddleswall and ceiling brackets. |
Manifolding heated water units must include: | balanced flow conditions and valvespressure relief requirements. |
Water heaters: | may include:continuous flowheat transferpressure storage systemsopen vented storage systemsheated source may include:electricitygasheat pumpsolarsolid fuelwaste heat. |
Safe trays and overflows must include: | designdischargematerialssizes. |
Materials may include: | pipe materials as specified, including:coppercompositepolymerother approved materials flue materials, including stainless steelancillary material, including:air relief valveheatersfittings and fixturesinsulationpumpsvalves. |
Jointing methods may include: | brazingcompressionelectrofusion weldingflaringmechanical jointsthreading. |
Insulation materials may include: | fibre glassfoammetal sheathingrock woolother approved materials. |
Installation requirements must include: | fire rating of penetrationslevel of workmanshipmanufacturer-recommended specific fixingspipe supportprovision for expansionserviceability and access. |
Circulating systems may include: | approved pressure pipes and fittingsbalancing valvescirculating pump and controlsisolating valvesthermo cycletemperature gaugepump sizing to meet calculated flow conditions. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resourcesmay include:selecting appropriate material to ensure minimal environmental impactefficient use of materialefficient energy usage/capital outlay comparisonselection of energy efficient water heaterwater efficiencyconsideration of the Green Building Council of Australia rating scheme. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced using:computer generationdrawing equipment. |
Specification may include: | supportjointingflow requirementsmanufacturer requirementsmaterialsresidual pressures and temperaturesafety (WHS)specialised componentstestingvalve selectionwater treatmentworkmanship. |
Testing may include: | air pressure defect inspectionflue operationhydrostatic mains pressureperformancequality assurance (QA) audit. |
Commissioning schedule may include: | balancing the systemchecking and flushing the systemdisinfectionflow testflue operationleak checkpressure testsystem certificationsystem defectssystem functions as per designsystem purgetemperature settingvalve operation. |
Operation and maintenance manual may include: | as installed drawingsresults of commissioning testcertification documentationheater details, settings and operationsmaintenance schedulesmanufacturer brochures and technical informationvalve function. |