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The Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993
NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
The Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993 (the Workplace Regulations) contain some requirements which affect building design. The main requirements are now covered
flatsnon-domesticDocument title and scope
NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Technical Booklet P: 2012 Sanitary appliances, unvented hot water storage systems and reducing the risk of scalding
non-domesticdwellingsanitary-applianceshot-water-storagescalding-riskSanitary appliances - general requirements
86NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Every sanitary appliance shall have smooth and readily cleansed, non-absorbent surfaces and shall discharge through an effective trap of suitable dimensions. Every washbasin, bath and shower shall hav
drainagenon-domesticSanitary accommodation location and access
87NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Sanitary accommodation in any building other than a dwelling shall not open directly into a room used for kitchen purposes. Any sanitary accommodation which can be entered directly from a room used fo
drainagenon-domesticProvision of sanitary appliances, sanitary appliances, and sanitary accommodation
Regulations 85, 86, 87NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Regulation 85 Provision of sanitary appliances 86 Sanitary appliances 87 Sanitary accommodation 0.1 These are prescriptive regulations that must be followed therefore no guidance is given in this Tech
non-domesticdwellingflatsUnvented hot water storage systems
Regulation 88NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Regulation 88 Unvented hot water storage systems 0.2 Any hot water storage system with no vent pipe to the atmosphere (other than a system or part of a system used solely for space heating or an indus
dwellingnon-domesticflatsScope of Section 1 - Unvented Hot Water Storage Systems
1.1NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
This Section contains provisions for an unvented hot water storage system. All the components within the system should be of adequate strength and capable of safely withstanding the temperatures and p
non-domesticdwellingfire-safetyenergyDefinition of Package
1.2NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Package – an unvented hot water storage system having factory fitted safety devices together with a kit containing pressure and other devices supplied by the package manufacturer, to be fitted by the
non-domesticdwellingenergyDefinition of Unit
1.2NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Unit – an unvented hot water storage system having safety devices and all other devices factory fitted by the unit manufacturer (see Diagram 1.2).
non-domesticdwellingenergyDefinition of Unvented Hot Water Storage System
1.2NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Unvented hot water storage system – includes a system with an unvented vessel for either – (a) storing domestic hot water for subsequent use; or (b) heating domestic hot water as it passes through an
non-domesticdwellingenergyLimitations on Heating Sources
1.3NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
An unvented hot water storage system should not be heated – (a) directly by a solid fuel heating appliance; or (b) indirectly by a sealed primary circuit which is heated by a solid fuel heating applia
non-domesticdwellingenergyInstallation Requirements and Qualified Operatives
1.4NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
The installation must be carried out by a person holding a current Registered Operative Identity Card for the installation of unvented hot water storage systems issued by – (a) the Association of Inst
non-domesticdwellingenergyUnvented hot water storage system — Package configuration
Diagram 1.1NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
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 va
dwellingnon-domesticflatsUnvented hot water storage system — Unit configuration
Diagram 1.2NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Diagram 1.2 Unvented hot water storage system — Unit * Expansion vessel, expansion valve, tundish, temperature relief valve, pressure reducing valve with strainer, stop valve, water main, discharge,
dwellingnon-domesticflatsMinimum safety devices for unvented hot water storage systems
2.1NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
To minimise the danger from excessive pressure, unvented hot water storage systems should incorporate a minimum of two independent safety devices in addition to any thermostat provided to control the
non-domesticdwellingenergyApproach to safety devices: energy cut-out and relief valve
2.2NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
One approach might consist of – (a) a non self-resetting energy cut-out to disconnect the supply of heat to the storage vessel in the event of the storage system overheating; and (b) a temperature rel
non-domesticdwellingenergyRelief valve restrictions for systems without automatic replenishment
2.3NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Temperature relief valves and combined temperature and pressure relief valves should not be used in systems which have no provision to automatically replenish the stored water (e.g. unvented primary t
non-domesticdwellingenergyCompliance with European Council Directives
2.4NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
Any product designed and manufactured to comply with the requirements of a European Council Directive [e.g. 97/23/EC (Pressure Equipment Directive) or 2009/142/EC (Gas Appliances Directive), implement
non-domesticdwellingScope: systems up to 500 litres and 45 kW
2.5NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
The guidance under this heading contains provisions for an unvented hot water storage system, whether heated directly or indirectly, having a storage vessel which has a capacity of not more than 500 l
non-domesticdwellingenergyCompliance standards for unvented hot water storage systems
2.6NI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
An unvented hot water storage system should – (a) comply with BS 6700+ A1 or BS EN 12897; (b) be a unit or package which has been certified – (i) as meeting the relevant requirements of regulation 88
non-domesticdwellingenergyRelevant British Standards for Unvented Hot Water Storage and Sanitary Appliances
Appendix Publications referred toNI-wide·Technical Booklet P Sanitary Appliances Unvented Hot Water Storage and Scalding
BS EN 257: 2010 Mechanical thermostats for gas-burning appliances. BS EN 1111: 1999 Sanitary tapware. Thermostatic mixing valves (PN 10). General technical specification. BS EN 1287: 1999 Sanitary tap
dwellingnon-domesticsanitary-appliancesunvented-hot-water-storagescalding-prevention