AS 1603.13:2018 pdf download.Automatic fire detection and alarm systems Part 13: Duct sampling smoke detectors.
Section 2 General requirements
2.1 General
Duct sampling equipment shall incorporate a smoke detector conforming to the AS ISO 7240 series and a duct sampling housing conforming to at least one of the following: (a) AS 1603.13—1998. (b) EN 54-27. (c) UL268A.
A duct sampling housing conforming to (a), (b) or (c) above is considered to meet the requirements of Clauses 3.1, 3.3, 3.4, 3.5, 3.6, 5.3. The associated detector shall reliably respond to defined changes in smoke density sampled by the DSE from moving air within the duct.
2.2 Sensitivity
When tested In accordance with Appendix A, the nominal sensitivity value shall be equal to or less than 10 % Obs/m and all individual results shall be within ± 50 % of the nominal value.
2.3 Air leakage
When the DSE housing has not been tested to one of the referenced DSE Standards it shall be tested in accordance with Appendix B and meet the requirements of Table 2.1.Section 3 Design and construction
3.1 General
The material, form and arrangement of components shall be such that it will be practicable to install and maintain the DSE in a reliable condition. DSEs intended for use in situations where they are likely to become wet shall have an appropriate IP rating. Where the DSE can be separated from its mounting or terminating facilities, those facilities shall be considered part of the DSE for the purpose of this Standard. General design features of DSEs shall be as follows:
(a) Suitability— Design and construction of a DSE shall conform with the performance requirements of Section 5.
(b) Electrical and electronic components — Electrical and electronic components shall be of a quality suitable to withstand the maximum and minimum temperatures that will occur inside the detector when subjected to tests specified in Section 5.Equipment design shall ensure operating conditions of the components used shall not exceed the limits specified by the components’ manufacturer.
(c) Mechanical design — Mechanical strength of all DSE parts, including the detector enclosure and subassemblies, shall be capable of supporting the weight of components mounted thereon. The enclosure shall also be sufficiently rigid to prevent any detrimental effects due to handling in service.
3.2 Electrical requirements
3.2.1 Electrical safety
Where the maximum working voltage exceeds extra-low voltage (ELy), the DSE shall conform with the appropriate requirements of AS/NZS 3100.
3.3 Connecting facilities
The means of connection shall not permit disconnection of the DSE or its associated detector without initiating a fault or alarm signal at the control and indicating equipment (CIE). Where this requirement can be achieved without providing separate terminations for each incoming and outgoing conductor, such alternative means of connection shall be considered satisfactory. This requirement includes any arrangement by which the DSE can be detached from its terminating facility. The terminations shall be designed so conductors connected thereto can be rigidly and effectively clamped between metal surfaces, or soldered, to ensure the connection made will not slacken or overheat under normal conditions of use. For polarity sensitive DSEs, reverse connection shall initiate a fault or alarm signal but not damage the DSE. Any termination shall be of such size as will appropriately accommodate the number and size of conductors required for the connection of the DSE. NOTE The following are typical methods of connection: (a) A terminal screw for each conductor. (b) Single screw and clamp with saddle providing at least two routes for each conductor. (c) Conductors soldered individually and separate on the termination.
3.4 Indicating facilities
Visual alarm indicators shall be red. No other indicator shall be red except that the visual alarm indicator may blink to indicate that the device is operational. A required visual alarm indicator shall conform with the requirements of AS 7240.7. Where a remote indicating facility is provided, the failure of the remote indicator, a short circuit or an open circuit shall not prejudice the alarm operation of the smoke detector. AS 1603.13 pdf download.
AS 1603.13:2018 pdf download – Duct sampling smoke detectors
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