BS 4856-4:1997
Current
The latest, up-to-date edition.
Methods for testing and rating fan coil units, unit heaters and unit coolers Determination of sound power levels of fan coil units, unit heaters and unit coolers using reverberating rooms
Hardcopy , PDF
English
15-09-1997
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Committees responsible
Foreword
Introduction
Method
1 Scope
2 Normative references
3 Definitions
4 Test facility, instrumentation and procedures
5 Installation and operation of equipment to be tested
6 Information to be reported
Annex
A (informative) Bibliography
Tables
1 Acoustic test requirements
2 Uncertainty in determining sound power levels
Figures
1 Typical test installation for a wall-mounted unit
2 Typical test installation for a ducted unit
3 Typical test installation for the open inlet and case
radiated noise test
4 Typical test installation for the case radiated noise test
List of references
Defines a method for determination of the sound power levels of fan coil units, unit heaters and unit coolers in a reverberation room.
| Committee |
RHE/6
|
| DevelopmentNote |
Supersedes BS 4856-4(1978), BS 4856-5(1979) & 95/717445 DC. (07/2005) Reviewed and confirmed by BSI, December 2012. (11/2012)
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard establishes general rules for acoustic testing of fan coil units, unit heaters and unit coolers, in order to determine sound power levels. This standard is applicable to equipment operating under steady state conditions. It applies to sources that produce steady broad-band noise, and to sources that may produce significant discrete frequency components or narrow band noises.
| BS EN 60651:1994 | Specification for sound level meters |
| BS 4856-2:1975 | Methods for testing and rating fan coil units, unit heaters and unit coolers Thermal and volumetric performance for cooling duties: without additional ducting |
| BS 4196-2:1991 | Sound power levels of noise sources Precision methods for determination of sound power levels for discrete-frequency and narrow-band sources in reverberation rooms |
| BS 4856-3:1975 | Methods for testing and rating fan coil units, unit heaters and unit coolers Thermal and volumetric performance for heating and cooling duties; with additional ducting |
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