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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 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 include: | architectural specifications builder specifications owner requirements specialist water heating applications. |
Efficiency includes: | 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 includes: | comparison and evaluation of capital cost, simple pay back and life cycle cost of solar and electric or gas heated water heaters comparison of initial set-up costs to the energy savings available and establishment of cost-recovery period comparison 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 policies Australian and New Zealand standards: AS/NZS3500 National plumbing and drainage set 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 AS2535.1 Test methods for solar collectors - thermal performance of glazed liquid heating collectors including pressure drop AS2712 Solar and heat pump water heaters - design and construction AS3634 Solar heating systems for swimming pools AS4234 Solar water heaters - domestic and heat pump - calculation of energy consumption AS4445.1 Solar heating - domestic water heating systems - performance rating procedure using indoor test methods DR04527 Amendment 1 to AS2712 Solar water heaters - design and construction Building Code of Australia. |
Manufacturer requirements include: | material specifications pump tables sizing tables technical and trade manuals. |
Desktop study includes: | collection and interpretation of existing data for design purposes from: architectural and building plans council plans developer plans other documents, including: applications forms other reports as available comparison 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 requirements flow pressure velocity water quality and its effect on system life. |
Layout of pipework systems: | includes: 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 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 include: | alternative supplementary fuel sources, including: coal electricity fuel oil gas 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 include: | circulation calculations energy balance equation flow calculations heat loss calculations, covering: collector losses overnight losses standing losses temperature and energy equations varying inlet temperature and flow rate effect on the performance of a solar collector volume calculations. |
Components include: | collectors differential controllers electronics expansion tanks filters fittings flow and return pipework heat exchangers insulation overflows safe trays storage vessels suitable type and size of circulating pumps supplementary heat sources support frames timers and mechanical components valves. |
Methods for freezing protection include: | circulating systems dump valves heat trace systems. |
Pipe size, velocity, flow and pressure calculations include: | rate of discharge temperature volume. |
Pipe fixings include: | anchors bracket spacing corrosion protection hanging brackets material requirements saddles wall and ceiling brackets. |
Materials include: | copper fittings and fixtures galvanised steel glass other approved pipe materials polybutylene protective coatings. |
Jointing methods include: | brazing compression flaring mechanical joints soldering threading. |
Installation requirements include: | clipping installation details jointing requirements level of workmanship roof support. |
Solar collector design includes: | box fin and tube collectors glass insulation pipe collectors pre-heat systems sun tracking systems. |
Plans include: | axonometrics cross-sections details elevations isometrics schematics, which may be produced using: pencil Indian ink pigment liner computer generation sections. |
Specification includes: | clipping details of specialised components jointing manufacturer requirements materials valve selection workmanship. |
Testing includes: | air pressure test defect inspection hydrostatic test mains pressure test quality assurance (QA) audit. |
Commissioning schedule includes: | flow test leak check pressure test pump commissioning system purge valve operation. |
Operation and maintenance manual includes: | leak detection pump maintenance valve maintenance water and energy auditing yearly inspection yearly maintenance requirements. |