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Control on Heating Sources
2.7NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Devices to control the heating source or sources should be supplied by the manufacturer as part of the unit or package, and should comply with paragraphs 2.9 and 2.10. However, an indirectly heated sy
hot-water-safetyunvented-systemsSystems with a Storage Vessel Over 500 Litres or Over 45 kW
2.8NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
An unvented hot water storage system, whether heated directly or indirectly, having a storage vessel which has a capacity of more than 500 litres or a power input of more than 45 kW will generally be
hot-water-safetyunvented-systemslarge-capacityTemperature Safety Devices
2.9NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
An unvented hot water storage system should have the following safety devices to limit the temperature of the stored water – (a) a non self-resetting thermal cut-out on each heating source, complying
hot-water-safetyunvented-systemsscalding-prevention