SN EN 14812 : 2005 + A1 2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Design requirements
   4.1 Materials of construction
   4.2 Connections
   4.3 Venting
   4.4 Radio interference and electrical safety
   4.5 Dosing agent containers
   4.6 Accessibility
   4.7 Nominal size
5 Performance requirements
   5.1 Dosing and dosing agents
        5.1.1 Dosing agents
        5.1.2 Dosing
   5.2 Working ranges
   5.3 Protection against backflow of proprietary chemical
   5.4 Working temperature range
   5.5 Pressure conditions
        5.5.1 Nominal pressure and working pressure range
        5.5.2 Effects of pressure variations
        5.5.3 Pressure drop
        5.5.4 Water hammer
6 Testing
   6.1 General
   6.2 Dosing and dosing agents
        6.2.1 Test rig
        6.2.2 Analysis
        6.2.3 Quality of test water
        6.2.4 Sampling
        6.2.5 Evaluation of results
        6.2.6 Dosing agents
        6.2.7 Dosing
   6.3 Working ranges
   6.4 Protection against backflow of dosing agent
        6.4.1 Procedure
        6.4.2 Evaluation of results
   6.5 Pressure conditions
        6.5.1 Nominal pressure and working pressure range
        6.5.2 Static pressure
        6.5.3 Dynamic pressure
        6.5.4 Working pressure range
        6.5.5 Pressure drop
7 Labelling
   7.1 Nameplate on dosing apparatus
   7.2 Information to be given on dosing agent container
8 Manufacturer's product information
Annex A (informative) Examples of connections
Bibliography

Defines definitions, principles of construction (but not dimensions) and design, requirements on performance and operation as well as methods for testing the performance of chemical preset dosing systems for conditioning water proposed for human consumption inside buildings which are permanently connected to the mains supply.