ABSTRACT
Systems for generating hot water must be provided with controls to regulate water temperature in normal use. The hot water from the boiler mixes directly with the water in the cylinder. If used in a soft' water area the boiler must be rust-proofed. Expansion devices in hot water systems are designed as a safe means for discharging water when system operating parameters are exceeded, i.e. in conditions of excess pressure and/or temperature. The system is less space consuming than conventional systems and saves installation costs as there are no cold water storage and expansion cisterns. Hot water provision in moderately large buildings such as spacious houses, small hotels, hostels and other situations where demand is periodically high, can be from a large storage cylinder or cylinders installed in duplicate. A hot water storage facility located between primary energy/heat source(s) and secondary heat load, i.e. hot water supply to taps and other fittings and possibly for space heating circuit.
