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Elements and Performance Criteria

1. Prepare to design hydronic systems and select equipment
   • WHS/OHS requirements and workplace procedures for a given work area are identified, obtained and applied
2. WHS/OHS risk control measures and workplace procedures are followed in preparation for the work
3. Scope of the proposed hydronic system is determined from the design brief and/or consultations with relevant person/s
4. Design development work is planned in accordance with workplace procedure for timelines in consultation with others involved
5. Design hydronic systems and select equipment
   • Relevant hydronic system processes and methods are applied to the design
6. Alternative concepts for design are evaluated in accordance with the design brief
7. Safety, functionality and budgetary considerations are incorporated in the design specifications
8. System design draft is checked for compliance in accordance with the design brief and relevant industry standards
9. System design is documented for submission to relevant person/s for approval
10. Unplanned events are dealt with in accordance with problem-solving techniques and workplace procedures
11. Obtain approval for hydronic system design and equipment selection
    • System design is presented to customer and/or relevant person/s
12. Requests for alterations to the design are negotiated with relevant person/s in accordance with workplace procedures
13. Final design is documented and approval obtained from relevant person/s in accordance with workplace procedures
14. Quality of work is monitored in accordance with workplace procedures and relevant industry standards

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment. Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.
Designing hydronic systems must include at least the following:	two different hydronic systems

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

developing outlines of alternative designs developing the design within the safety, regulatory, functional requirements and budget limitations documenting and presenting design effectively successfully negotiating design alteration requests obtaining approval for final design dealing with unplanned events applying relevant work health and safety (WHS)/occupational health and safety (WHS/OHS) requirements, including using risk control measures designing hydronic systems and selecting equipment preparing to design hydronic systems and select equipment.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

heating, ventilation and air conditioning/refrigeration (HVAC/R) hydronic system design, safe working practices and relevant standards, codes and regulations, including: hydronic system design fundamentals: principles of fluid flow properties of fluids flow of ideal fluids fluid flow equipment Bernoulli Theorem fluid flow in pipes pressure loss and static head – calculation: flow throughout system pressure throughout system friction losses pressure loss charts for: copper, steel and unplasticised polyvinyl chloride (uPVC) dynamic losses fitting pressure losses fitting interaction total losses calculating system (static and dynamic) head pump performance and selection: pump classification and types pump performance terminology, discharge, head, power, efficiency, speed and net positive suction head required pump performance curves pump laws system head and ‘K’ factor balance points energy considerations pump cavitation calculation of net positive suction head available series and parallel operation pipe sizing: maximum friction rate erosion and equipment life industry standards recommended system water velocities economic balance - first cost and operating cost hot water systems: boilers coils expansion tanks pumps and characteristics curves control valves, types and flow diagrams air purge points water treatment pipe anchors and expansion joints chilled water systems: chillers coils expansion tanks pumps and characteristics curves control valves, types and flow diagrams air purge points water treatment pipe anchors and expansion joints HVAC/R hydronic systems: systems operation closed/open systems pump head/lift and static head (high-rise building) system friction losses nett positive suction head system curves pumps: types selection criteria performance characteristics bladder tanks coil characteristics heat exchangers: plate, shell and tube, and tube in tube flow measurements: types flow switchers builders: types and performance characteristics cooling towers: elementary cooling thermodynamics and types valves - flow control devices: types and applications throttling characteristics flow measurements selection and applications hydronic system configuration and design: piping configurations single pipe closed circuit two pipe closed circuit direct return three pipe closed circuit with reversed return three-way diverting valves risers and headers component location evaluation of piping configurations: capital cost owning and operating costs noise vibration maintenance future expansion commissioning and balancing operating characteristics cavitation system pipe sizes: pipe dynamic and friction losses for different materials fitting pressure losses for different materials thermal heat losses bare, insulated and underground pipes air conditioning system design problem-solving techniques relevant job safety assessments or risk mitigation processes relevant manufacturer specifications relevant WHS/OHS legislated requirements relevant workplace budget, quality, policies and procedures relevant workplace documentation.

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