VESDA by Xtralis
VESDA VLF-500 Product Guide
www.xtralis.com
11
2.5
Air inlet pipe connections
The tapered shape of the air inlet port is designed to accept standard pipes of OD 25 mm (ID 21 mm) or IPS ¾
in (OD 1.05 in) and provide an air tight seal.
Note:
Do not glue the air inlet pipe to the detector. This will void your warranty.
2.6
Exhaust air pipe connections
Where the VESDA VLF is located outside the protected area, consideration must be given to returning the
exhaust air to the protected environment to balance pressure differences that may exist between the two
areas. In the majority of applications, this is not necessary as pressure differences are minimal.
In some circumstances, the pre-engineered solutions in this manual may not be suitable and it is
recommended that alternate designs are verified by a suitably qualified installer using ASPIRE.
Examples of these circumstances are: where pressure differences exceed 50 Pa; in situations where the
detector is located outside the protected area; in cases where there are hazardous substances inside the
protected area eg hospital operating theatres, laboratories. In these cases, the exhaust should be returned to
the protected area.
Return air pipes need to be as short as possible to minimize the effect of airflow resistance in the return air
pipe network. Remove the fitted exhaust deflector and install a return air pipe where required.
The air exhaust port is tapered to accept standard pipes of OD 25 mm (ID 21 mm) or IPS ¾ in. and provide an
air tight seal.
Note:
Do not glue the exhaust air pipe to the detector. This will void your warranty.
