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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
terms of heating and domestic hot water (DHW). HIU provides complete solutions for apartments and houses to make radiator heating or underfloor heating and instantaneous DHW preparation with thermo-static control. This document describes a specific model of HIU, namely HIU-Indirect (Figure 1).
Indirect cylinders tested in accordance with BS EN 12897:2006. 2. Heat up time from cold through 45°C, based on a flow temperature of 80°C +/- 2°C & normal volume.
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.
requirements, including hot water supply provision, system design, safety considerations, and installer accreditation. The page aims to guide readers through the essential information needed to ensure compliance and safe operation of unvented hot water storage systems.
The PremierPlus SystemFit unvented water heater can be fed directly from the cold water mains supply to the property without the need for separate feed cisterns or vent pipes. It is supplied fitted with all its necessary inlet and safety controls for
