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1) Directly into the cylinder coil 2) Indirectly into the cylinder coil via HIU 3) Indirectly into the cylinder via PHE. Note: Other methods of heat heating stored hot water are available, but outside the scope of this design guide.
1. Assessment & estimation of demands. 2. Supply scheme & schematic. 3. Water storage requirements. 4. Piping layout. 5. Pipe sizing. 6. Pump system design. The systems must comply with Water Authority (WSD) requirements. General principles for installing plumbing works (from WSD Plumbing Installation Handbook)
The supply system is split into several zones supplying a maximum of 12 floors each. This ensures adequate water pressure on all floors without using pressure relief valves.
The indirect system prevents furring of the boiler, primary flow and return pipes, and hot water storage cylinder. The system is also employed in soft water districts when heating is combined with hot water supply, to prevent rusting of the cast iron radiators, which causes discolouration of the water to be drawn off.
direct cross connection is a piping system connecting a raw water supply, used for industrial fire fighting, to a municipal water system. • An indirect cross connection is an arrangement whereby unsafe water, or other liquid, may be blown, siphoned or otherwise diverted into a safe water system.
This document discusses different methods of hot water supply systems. It describes electric, gas, solar, and central hot water heating systems. It also explains the differences between direct and indirect central hot water systems.
The document summarizes water supply systems for houses. It describes direct and indirect cold water supply systems. For hot water, it discusses localized and centralized hot water systems. It also explains the two types of water heaters: instantaneous (tankless) water heaters and storage water heaters.
