NEN EN 255-3 : 1997 C1 1997

Foreword
1 Scope
2 Normative references
3 Definitions
4 Mechanical components
5 Process components
6 Instrumentation - indication and registration
    devices
7 Control systems
8 Performance requirements
9 Sound power
10 Rate of pressure change
11 Safety
12 Marking
13 Service and local environment
14 Installation checks
15 Categories of tests
16 Test programmes
17 Microbiological tests
18 Thermometric tests
19 Bowie and Dick tests
20 Air leakage tests
21 Air detector tests
22 Load dryness tests
23 Sound power test
24 Steam quality tests
25 Dynamic sterilizer chamber pressure test
26 Test apparatus, equipment and material
27 Documentation
28 Information
Annexes
A (informative) Recommended materials
B (informative) Suggested maximum values of steam
    contaminants
C (informative) Bibliography
ZA (informative) Clauses of this European Standard
    addressing essential requirements or other provisions
    of EU Directives
Foreword
1 Scope
2 Normative references
3 Definitions and symbols
4 Performance tests
5 Test report
6 Marking
Annexes
A (informative) Types of sanitary hot water heat
    heat pumps
B (informative) Bibliography
Tables
1 Uncertainties of measurement for indicated values
2 Test conditions applicable to all systems
3 Test conditions for particular types of systems
4 Permissible deviations from set values (effects due to
    defrosting are not included)
5 Presentation of average measured values
6 Presentation of main results
Figures
1 Illustration of the test procedure
A.1 Types of sanitary hot water heat pumps

Defines testing and reporting methods for rating and defines requirements for marking of air/water and water/water heat pumps with electrically driven compressors for use for sanitary hot water. Applicable to factory-made units capable of being ducted.