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 maintained heat 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 collectors solar radiation calculations, including: calculations of efficiency calculations of radiation falling on collectors daily, monthly and yearly calculations. |
Design requirements may include: | architectural plans building specifications fire rating of penetrations frost protection integration with other heat sources limitations of various systems overheating protection owner requirements pipework identification specialist heated water use applications. |
Efficiency must include: | angle of collector in relation to latitude comparison of demand and efficiency curves for various types of solar collectors current and potential shading direction in relation to north efficiency in relation to: ambient temperature flow location pollution prevailing wind conditions magnetic 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 project may include: design styles energy costs expected design life labour costs material costs safety factors speed of installation suitable materials comparison and evaluation of capital cost, simple pay back and lifecycle cost of solar and other heat sources comparison 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 requirements Australian standards: AS/NZS3500 National plumbing and drainage AS2200 Design charts for water supply and sewerage AS2369.1 Materials for solar collectors for swimming pool heating - rubber materials AS2369.2 Materials for solar collectors for swimming pool heating - flexible or plasticised polyvinyl chloride AS/NZS2535.1 Test methods for solar collectors - thermal performance of glazed liquid heating collectors including pressure drop AS/NZS2712 Solar and heat pump water heaters design and construction AS3634 Solar heating systems for swimming pools AS/NZS4234 Solar water heaters domestic and heat pump - calculation of energy consumption AS/NZS4445.1 Solar heating domestic water heating systems performance rating procedure using indoor test methods DR04527 Amendment 1 to AS/NZS2712 Solar water heaters design and construction National Construction Code. |
Manufacturer requirements may include: | heater maintenance and servicing material specifications provision for heater pressure and temperature discharge protection for freezing and overheating recommended specific fixings for pipework sizing tables technical and trade manuals limitations of use. |
Desktop study may include: | collection and interpretation of data for design purposes, such as: architectural and building plans developer plans manufacturer’s data documents, which may include: applications brochures forms policies other reports as available local authorities’ requirements area suitability for solar shadow studies comparison 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 requirements pressure system design velocity water quality and its effect on the system. |
Layout of pipework systems: | must include: dual feed ring main single pipe should not unduly affect building integrity and aesthetic appeal should have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves may include: | fittings: bends elbows tees unions valves: backflow prevention excess pressure frost protection devices isolating location of valves over temperature pressure limiting pressure reduction strainers. |
Proprietary solar heated water systems may include: | alternative supplementary fuel sources, including: coal electricity fuel oil gas heat pump waste heat recovery (mechanical plant) wood circulating systems clarifiers close coupled, split systems direct and indirect heating systems heat exchange systems heated water heaters pool heaters solar pre-heaters spa heaters storage systems sun track systems. |
Solar water heating system calculations may include: | area locality circulation calculations energy balance equation flow calculations heat loss calculations, covering: collector losses overnight losses standing losses incoming water temperature temperature and energy equations varying inlet temperature and flow rate effect on the performance of a solar collector volume calculations. |
Components may include: | collectors differential controllers electronics expansion tanks filters fittings flow and return pipework heat exchangers insulation overflows pumps safe trays storage vessels suitable type and size of circulating pumps supplementary heat sources support frames timers and mechanical components valves water treatment. |
Methods to prevent freezing and protect from over performance may include: | circulating systems drain back systems dump valves heat trace systems indirect systems insulation. |
Pipe size, velocity, flow and pressure calculations must include: | rate of discharge temperature velocities volume. |
Pipe supports may include: | anchors bracket spacing corrosion protection hanging brackets manufacturer-recommended specific fixings material requirements provision for expansion saddles. |
Materials may include: | copper (Cu) other approved materials. |
Jointing methods may include: | brazing compression flaring mechanical joints other approved jointing methods. |
Installation requirements include: | pipe protection, which may include: corrosion impact fire rating level of workmanship manufacturer-recommended specific fixings pipe support provision for expansion serviceability and access system structure support. |
Solar collector design may include: | collector housing fin and tube collectors glass insulation pipe collectors pre-heat systems sun tracking systems vacuum tube. |
Sustainability principles and concepts: | cover the current and future social, economic and environmental use of resources may include: efficient use of material efficient energy use/capital outlay comparison selecting energy efficient water heater reusing water, such as rainwater, greywater and recycled non-drinking water consideration of the Green Building Council of Australia rating scheme selecting appropriate components to ensure minimal environmental impact. |
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 safety (WHS) specialised components testing valve selection workmanship. |
Testing may include: | air pressure defect inspection hydrostatic mains pressure performance quality assurance (QA) audit. |
Commissioning schedule may include: | balancing the system checking and flushing the system checking and maintaining heat transfer fluid levels temperature setting disinfection flow test leak check pressure test system certification system defects system functions as per design valve operation. |
Operation and maintenance manual may include: | as installed drawings certification documentation results of commissioning test heater detail, setting and operations maintenance schedules manufacturer brochures and technical information valve function safety management system system detail, setting and operations. |