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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.
Centralised hot water systems • Indirect system with a primatic cylinder • Three air locks to prevent mixing of the primary and secondary waters • Save cost for expansion and feed tank, primary cold feed and primary vent pipe • Limited in use to small installations 56
Pump system design. The systems must comply with Water Authority (WSD) requirements. General principles for installing plumbing works (from WSD Plumbing Installation Handbook) All water fittings and pipework shall comply with the relevant Waterworks Regulations.
These systems are suitable for single-application domestic hot water supply and are appropriate in areas that do not freeze for long periods and do not have hard or acidic water. They are simple to design and operate and the least expensive to install among all active systems.
4 lis 2023 · hot and cold water systems and heating inside buildings are now the preferred solution for most domestic installations. Systems are available in crosslinked polyethylene (PE-X), polyethylene with raised temperature performance (PE-RT), polybutylene.
The indirect system prevents furring of the boiler, primary flow and return pipes, and hot water storage cylinder. Download to read the full chapter text Chapter PDF
The essential features of a hot water supply system should be to produce sufficient hot water to meet all demands, be economical in running costs, be suitable for the type of building and relatively easy to install and maintain. There are two main systems of hot water supply - direct and indirect. Direct System
