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: | interpreting plans and specifications, and sizing and documenting layout of solar water heating systems for applications including residential, commercial and industrial buildings for new projects or an existing structure being renovated, extended, restored or maintainedheat transfer mechanism analysis, including conduction, convection and radiation (long wave and short wave), and the evaluation of transmittance, absorption and emittance properties of materials used in solar collectorssolar radiation calculations, including:calculations of efficiencycalculations of radiation falling on collectorsdaily, monthly and yearly calculations. |
Design requirements may include: | architectural plansbuilding specificationsfire rating of penetrationsfrost protectionintegration with other heat sourceslimitations of various systemsoverheating protectionowner requirementspipework identificationspecialist heated water use applications. |
Efficiency must include: | angle of collector in relation to latitudecomparison of demand and efficiency curves for various types of solar collectorscurrent and potential shadingdirection in relation to northefficiency in relation to:ambient temperatureflowlocationpollutionprevailing wind conditionsmagnetic north as opposed to true north. |
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 materialscomparison and evaluation of capital cost, simple pay back and lifecycle cost of solar and other heat sourcescomparison of initial set-up costs to the energy savings available and establishment of cost-recovery period. |
Statutory and regulatory requirements and relevant Australian standards and codes may include: | Acts, regulations, and commonwealth, state or territory, and local government requirementsAustralian standards:AS/NZS3500 National plumbing and drainageAS2200 Design charts for water supply and sewerageAS2369.1 Materials for solar collectors for swimming pool heating - rubber materialsAS2369.2 Materials for solar collectors for swimming pool heating - flexible or plasticised polyvinyl chlorideAS/NZS2535.1 Test methods for solar collectors - thermal performance of glazed liquid heating collectors including pressure dropAS/NZS2712 Solar and heat pump water heaters design and constructionAS3634 Solar heating systems for swimming poolsAS/NZS4234 Solar water heaters domestic and heat pump - calculation of energy consumptionAS/NZS4445.1 Solar heating domestic water heating systems performance rating procedure using indoor test methodsDR04527 Amendment 1 to AS/NZS2712 Solar water heaters design and constructionNational Construction Code. |
Manufacturer requirements may include: | heater maintenance and servicing material specificationsprovision for heater pressure and temperature dischargeprotection for freezing and overheatingrecommended specific fixings for pipeworksizing tablestechnical and trade manualslimitations of use. |
Desktop study may include: | collection and interpretation of data for design purposes, such as:architectural and building plansdeveloper plansmanufacturer’s datadocuments, which may include:applicationsbrochuresformspoliciesother reports as availablelocal authorities’ requirementsarea suitability for solarshadow studiescomparison of performance of various types of solar water heaters in terms of design, location and predicted solar fraction. |
Performance requirements are established using relevant Australian standards, codes, commonwealth, state or territory and local authority plans and may include: | flow rate requirementspressuresystem designvelocitywater quality and its effect on the system. |
Layout of pipework systems: | must include:dual feedring mainsingle pipeshould not unduly affect building integrity and aesthetic appealshould have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves may include: | fittings:bendselbowsteesunionsvalves:backflow preventionexcess pressurefrost protection devicesisolatinglocation of valvesover temperaturepressure limitingpressure reductionstrainers. |
Proprietary solar heated water systems may include: | alternative supplementary fuel sources, including:coalelectricityfuel oilgasheat pumpwaste heat recovery (mechanical plant)woodcirculating systemsclarifiersclose coupled, split systemsdirect and indirect heating systemsheat exchange systemsheated water heaterspool heaterssolar pre-heatersspa heatersstorage systemssun track systems. |
Solar water heating system calculations may include: | area localitycirculation calculationsenergy balance equationflow calculationsheat loss calculations, covering:collector lossesovernight lossesstanding lossesincoming water temperaturetemperature and energy equationsvarying inlet temperature and flow rate effect on the performance of a solar collectorvolume calculations. |
Components may include: | collectorsdifferential controllerselectronicsexpansion tanksfiltersfittingsflow and return pipeworkheat exchangersinsulationoverflowspumpssafe traysstorage vesselssuitable type and size of circulating pumpssupplementary heat sourcessupport framestimers and mechanical componentsvalveswater treatment. |
Methods to prevent freezing and protect from over performance may include: | circulating systemsdrain back systemsdump valvesheat trace systemsindirect systemsinsulation. |
Pipe size, velocity, flow and pressure calculations must include: | rate of dischargetemperaturevelocitiesvolume. |
Pipe supports may include: | anchorsbracket spacingcorrosion protectionhanging bracketsmanufacturer-recommended specific fixingsmaterial requirementsprovision for expansionsaddles. |
Materials may include: | copper (Cu)other approved materials. |
Jointing methods may include: | brazingcompressionflaringmechanical jointsother approved jointing methods. |
Installation requirements include: | pipe protection, which may include:corrosionimpactfire ratinglevel of workmanshipmanufacturer-recommended specific fixingspipe supportprovision for expansionserviceability and accesssystem structure support. |
Solar collector design may include: | collector housingfin and tube collectorsglassinsulationpipe collectorspre-heat systemssun tracking systemsvacuum tube. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resourcesmay include:efficient use of materialefficient energy use/capital outlay comparisonselecting energy efficient water heaterreusing water, such as rainwater, greywater and recycled non-drinking waterconsideration of the Green Building Council of Australia rating schemeselecting appropriate components to ensure minimal environmental impact. |
Plans: | may include:axonometricscross-sectionsdetailselevationsisometricsschematicssectionsmay be produced using:computer generationdrawing equipment. |
Specification may include: | supportjointing flow requirementsmanufacturer requirementsmaterialssafety (WHS)specialised componentstestingvalve selectionworkmanship. |
Testing may include: | air pressure defect inspectionhydrostatic mains pressure performancequality assurance (QA) audit. |
Commissioning schedule may include: | balancing the systemchecking and flushing the systemchecking and maintaining heat transfer fluid levelstemperature settingdisinfectionflow testleak checkpressure testsystem certificationsystem defectssystem functions as per designvalve operation. |
Operation and maintenance manual may include: | as installed drawingscertification documentationresults of commissioning testheater detail, setting and operationsmaintenance schedulesmanufacturer brochures and technical informationvalve functionsafety management systemsystem detail, setting and operations. |