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www.xtralis.com 

Doc. No. 35424_02 
February 2021 

 

The contents of this document are provided on an “as is” basis. No representation or warranty (either express 
or implied) is made as to the completeness, accuracy or reliability of the contents of this document. The 
manufacturer reserves the right to change designs or specifications without obligation and without further 
notice. Except as otherwise provided, all warranties, express or implied, including without limitation any 
implied warranties of merchantability and fitness for a particular purpose are expressly excluded. 

Xtralis, the Xtralis logo, The Sooner You Know, VESDA-E, VESDA, ICAM, ECO, OSID, and Sensepoint are 
trademarks and/or registered trademarks of Xtralis and/or its subsidiaries in the United States and/or other 
countries. Other brand names mentioned herein are for identification purposes only and may be trademarks 
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Recommendations 

Any recommendation on system design provided by Xtralis is an indication only of what is considered to be the most 
suitable solution to meet the needs of the common application environments described.  

In some cases the recommendations on system design provided may not suit the unique set of conditions experienced 
in a particular application environment. Xtralis has made no inquiry nor undertaken any due diligence that any of the 
recommendations supplied will meet any particular application. Xtralis makes no warranty as to the suitability or 
performance of any recommendation on system design. Xtralis has not assessed the recommendation on system design 
for compliance with any codes or standards that may apply nor have any tests been conducted to assess the 
appropriateness of any recommendations on system design. Any person or organization accessing or using a 
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competent authority in respect of or affecting the recommendation on system design in any jurisdiction in which it may 
be implemented. 

Xtralis products must only be installed, configured and used strictly in accordance with the General Terms and 
Conditions, User Manual and product documents available from Xtralis. Xtralis accepts no liability for the performance 
of the recommendation on system design or for any products utilized in the implementation of the recommendation on 
system design, aside from the General Terms and Conditions, User Manual and product documents.  

No statement of fact, drawing or representation made by Xtralis either in this document or orally in relation to this 
recommendation on system design is to be construed as a representation, undertaking or warranty.  

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Summary of Contents for VESDA-E VEP-1P

Page 1: ...DUCTS APPLICATION NOTE February 2021 Doc No 35424_02...

Page 2: ...mation contained in this document will assist you when designing VESDA E systems for this type of application Note This system is not suitable for use in flexible ducts Related Products VESDA E VEP 1P...

Page 3: ...1 3 2 VESDA E VEA 5 2 VESDA E System Installation 6 Environmental Conditions 6 2 1 1 VESDA E VEP 1P 6 2 1 2 VESDA E VEA 7 Key Installation Considerations 7 3 VESDA E System Commissioning 8 Hole Orien...

Page 4: ...a quarter of the height of the duct Figure 1 Side view of the inlet and exhaust pipe positions for a small ventilation duct A top view of the above installation is shown below Figure 2 The number of...

Page 5: ...m 0 66 ft 1 1 2 VESDA E VEA Return air sampling is achieved with microbore tubes for VEA system inserted in the return air duct behind the exhaust grill it is recommended the tubes are installed facin...

Page 6: ...commended that the inlet pipe of the smoke detector be in two branches The figure below Figure 5 shows a side view of a duct section with the relative insertion points for the inlet and exhaust pipes...

Page 7: ...le spacing is 0 4 m 1 3 ft The exhaust pipe must have 4 10 mm 13 32 inch sampling holes regardless of the width of the duct These holes should be located in the middle of the duct width at least 50 mm...

Page 8: ...uct is poor it is recommended that all holes on the inlet and exhaust pipes face downstream that is 180 to the incoming airflow The pipes should always be held in position at the duct walls with fitti...

Page 9: ...tside the duct where the detector is to be installed and the temperature of the air inside the sampling pipes of the detector You should measure the temperature and humidity both inside the duct and i...

Page 10: ...ream of humidifiers heating coils and filters Upstream of fresh air intakes For a smoke detector mounted on the duct ensure there are no tangible vibrations when the duct system is in full operation I...

Page 11: ...nd then record the Flow 5 Insert the inlet and exhaust smoke detector pipes in the duct with the holes facing the airflow and record Flow at the smoke detector 6 Slightly rotate the pipes so that the...

Page 12: ...xible tube containing water as shown Figure 9 ensuring all connections are airtight 2 Face the holes on both the inlet and exhaust pipes to the airflow Slightly rotate the pipes so that the water leve...

Page 13: ...tector Cover the electronics during this test with a sheet of paper 5 Introduce smoke inside the detector s interior housing using a smoke can 6 Place the smoke can s nozzle 0 5 m 1 5 ft away from the...

Page 14: ...1 Check flow readings at the smoke detector s Differences in flow readings from those of previous site visits require further investigation such as inspection of the pipes sampling tubes integrity for...

Page 15: ...mendation on system design Xtralis has not assessed the recommendation on system design for compliance with any codes or standards that may apply nor have any tests been conducted to assess the approp...

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