|
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. |
Design requirements include: | architectural specificationsbuilder specificationsowner requirementsspecialist water use applications. |
Work scope: | includes:application of the irrigation projectinterpretation of plans and specificationssizing and documenting layout of irrigation systems, for applications including residential, commercial, industrial and agriculturalmay be for new projects or an existing structure being renovated, extended, restored or maintained. |
Cost-benefit analysis includes: | 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 and regulationsAustralian and New Zealand standards, including:AS/NZS3500 National plumbing and drainage setAS2200 Design charts for water supply and sewerageBCAlocal and state government policies. |
Manufacturer requirements include: | material specificationspump tablessizing tablestechnical and trade manuals. |
Desktop study includes collection and interpretation of existing data for design purposes from: | building planscouncil plansdeveloper planslandscape and architectural plansother documents and reports as available. |
Flow and pressure tests include: | interpretation of flow and pressure tests conducted by a contractoron-site measurement of flows (l and s), velocity (m and s) and pressure (kPa). |
Water sources, volumes and areas to be irrigated include: | sources:creeksdamslakesmains supplyriversstreamstanksvolumes and areas:amount and duration of water supplyareas to be irrigatednumber of stations requiredtotal amount and flow rate required at each station. |
Soil types include: | gravelslight, medium and heavy claysloamsrocksands. |
Performance requirements include: | flow, velocity, pressure and discharge requirements, established using Australian and New Zealand standards and local authority requirements. |
Layout of pipework systems: | includes:distributiondual feed systemsrange pipesring mainsingle pipestation break-upshould not unduly affect aesthetic appeal and building integrityshould have principles of economy, serviceability, durability and fit for use applied. |
Fittings and valves include: | fittings:bendselbowsteesunionsvalves:backflow preventionexcess pressureisolatingpressure limitingpressure reductionstrainers. |
Backflow prevention devices include: | break tanksindividual protectionproperty protectiontestable and non-testable deviceszone protection. |
Materials include: | acrilonitrile butadiene styrene (ABS)composite pipeworkcopperfittings and fixturespolybutylenepolyethyleneprotective coatingssteel. |
Jointing methods include: | brazingcompressionflaringmechanical jointsrubber ring jointssolderingthreading. |
Sections and components of the irrigation system include: | irrigation stations:number, size, area, volume of water required, delivery requirements, operation and activation of stations, sprinkler patterns, location and distribution of sprinkler heads, obstacle avoidance, water minimisation, waste minimisation and timingmanifold systems:manifolds to stations, headers, branches, timers, isolators, servo valves, electronics, power supplies and manual activationsensors:moisture sensors, soil sensors, temperature sensors, humidity sensors, weather stations and computer automationautomatic controls:station controllers, servo valves, isolating valves, water tractors and timerssprinklers, drippers and irrigators:sprinkler heads, sprinkler flows, impact sprinklers, gear-driven sprinklers, water tractors, water cannons, tape drippers, individual drippers, flow controlled drippers, in-ground irrigation tapes and root inhibitor systemssprinkler patterns:head to head, square, triangular, circular, quarter overlap, half overlap, full overlap, double overlap and other overlap patterns. |
Pipe fixings include: | anchorsbeddingbracket spacingcorrosion protectioncoverhanging bracketsmaterial requirementssaddleswall and ceiling brackets. |
Pump, pump controls and pumproom requirements include: | automatic controlsimpeller sizinginlet and outlet design requirementsinstallation and mounting requirementspump selectionpump sizingspace requirementsvalve requirements. |
Installation requirements include: | beddingclippinginstallation detailsjointing requirementslevel of workmanship. |
Applications: | include:agricultural cropsgarden irrigationgolf coursesgreenhouseslawn wateringnurseriesshould also cover:individual crop water requirementstypes of plants and their respective crop factors. |
Delivery systems and patterns include: | main deliverynumber and design of stationsdesign includes:avoiding obstaclesirregular shapesminimising water wastagerange of irrigation applicationsrange pipesring mainssize and delivery of sprinklerssprinkler head placementsprinkler patterns. |
Plans include: | axonometricscross-sectionsdetailselevationsisometricsschematics, which may be produced using:computer generationIndian inkpencilpigment linersections. |
Specification includes: | beddingclippingjointingmanufacturermaterialsspecialised componentsvalve selectionworkmanship. |
Testing includes: | air pressure testdefect inspectionhydrostatic testmains pressure testquality assurance (QA) audit. |
Commissioning schedule includes: | flow testleak checkpressure testsystem flushvalve operation. |
Operation and maintenance manual includes: | leak detectionpump maintenancevalve maintenancewater auditingyearly inspectionyearly maintenance requirements. |