Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding·Page 11·Diagram 1.1
Unvented hot water storage system — Package configuration
Diagram 1.1 illustrates a typical directly heated unvented hot water storage system in Package form, showing the arrangement of safety devices including expansion vessel, temperature relief valve, tundish, pressure reducing valve, stop valve, check valve, and thermal cut-out.
Diagram 1.1 Unvented hot water storage system — Package *
Storage vessel with factory fitted safety devices
Expansion vessel, expansion valve, tundish, temperature relief valve, pressure reducing valve with strainer, stop valve, water main, discharge, check valve, hot water, heat source with thermostat and thermal cut-out.
Heating can be direct or indirect. This diagram illustrates a typical directly heated system.
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