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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 includes: | 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 include: | architectural specificationsbuilder specificationsowner requirementsspecialist water heating applications. |
Efficiency includes: | 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 includes: | comparison and evaluation of capital cost, simple pay back and life cycle cost of solar and electric or gas heated water heaterscomparison of initial set-up costs to the energy savings available and establishment of cost-recovery periodcomparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project. |
Statutory and regulatory requirements and Australian and New Zealand standards include: | Acts, regulations, and local and state government policiesAustralian and New Zealand standards:AS/NZS3500 National plumbing and drainage setAS2200 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 chlorideAS2535.1 Test methods for solar collectors - thermal performance of glazed liquid heating collectors including pressure dropAS2712 Solar and heat pump water heaters - design and constructionAS3634 Solar heating systems for swimming poolsAS4234 Solar water heaters - domestic and heat pump - calculation of energy consumptionAS4445.1 Solar heating - domestic water heating systems - performance rating procedure using indoor test methodsDR04527 Amendment 1 to AS2712 Solar water heaters - design and constructionBuilding Code of Australia. |
Manufacturer requirements include: | material specificationspump tablessizing tablestechnical and trade manuals. |
Desktop study includes: | collection and interpretation of existing data for design purposes from:architectural and building planscouncil plansdeveloper plansother documents, including:applicationsformsother reports as availablecomparison of performance of various types of solar water heaters in terms of design, location and predicted solar fraction. |
Performance requirements are established using Australian and New Zealand standards and local authority plans and may include: | discharge requirementsflowpressurevelocitywater quality and its effect on system life. |
Layout of pipework systems: | includes: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 include: | fittings:bendselbowsteesunionsvalves:backflow preventionexcess pressurefrost protection devicesisolatinglocation of valvesover temperaturepressure limitingpressure reductionstrainers. |
Proprietary solar heated water systems include: | alternative supplementary fuel sources, including:coalelectricityfuel oilgaswoodcirculating systemsclarifiersclose coupled, split systemsdirect and indirect heating systemsheat exchange systemsheated water heaterspool heaterssolar pre-heatersspa heatersstorage systemssun track systems. |
Solar water heating system calculations include: | circulation calculationsenergy balance equationflow calculationsheat loss calculations, covering:collector lossesovernight lossesstanding lossestemperature and energy equationsvarying inlet temperature and flow rate effect on the performance of a solar collectorvolume calculations. |
Components include: | collectorsdifferential controllerselectronicsexpansion tanksfiltersfittingsflow and return pipeworkheat exchangersinsulationoverflowssafe traysstorage vesselssuitable type and size of circulating pumpssupplementary heat sourcessupport framestimers and mechanical componentsvalves. |
Methods for freezing protection include: | circulating systemsdump valvesheat trace systems. |
Pipe size, velocity, flow and pressure calculations include: | rate of dischargetemperaturevolume. |
Pipe fixings include: | anchorsbracket spacingcorrosion protectionhanging bracketsmaterial requirementssaddleswall and ceiling brackets. |
Materials include: | copperfittings and fixturesgalvanised steelglassother approved pipe materialspolybutyleneprotective coatings. |
Jointing methods include: | brazingcompressionflaringmechanical jointssolderingthreading. |
Installation requirements include: | clippinginstallation detailsjointing requirementslevel of workmanshiproof support. |
Solar collector design includes: | boxfin and tube collectorsglassinsulationpipe collectorspre-heat systemssun tracking systems. |
Plans include: | axonometricscross-sectionsdetailselevationsisometricsschematics, which may be produced using:pencilIndian inkpigment linercomputer generationsections. |
Specification includes: | clippingdetails of specialised componentsjointingmanufacturer requirementsmaterialsvalve selectionworkmanship. |
Testing includes: | air pressure testdefect inspectionhydrostatic testmains pressure testquality assurance (QA) audit. |
Commissioning schedule includes: | flow testleak checkpressure testpump commissioningsystem purgevalve operation. |
Operation and maintenance manual includes: | leak detectionpump maintenancevalve maintenancewater and energy auditingyearly inspectionyearly maintenance requirements. |