VESDA VLC-400 Product Guide
VESDA by Xtralis
10
www.xtralis.com
The expected filter operating life is 5 years in a clean environment. In dusty environments the life expectancy
of the filter is reduced. The detector monitors the air filter life and indicates when it is time to change the filter.
It is generally recommended that the filter is replaced every 2 years in normal environments and a service
interval timer is provided for this function.
2.3.6
Air exhaust port
The air exhaust port, located at the bottom right hand side of the enclosure (see Figure 2-2) allows the
sampled air to be expelled into the environment. An arrow pointing away the port identifies the air outlet port
(see Figure 2-5 below).
Legend
A
Air Exhaust Port
Figure 2-5: Air Exhaust Port
The exhaust port may be left open, allowing sampled air to diffuse into the immediate environment or it may be
fitted with a pipe to return the air back to the sampling zone.
The air exhaust port is designed to accommodate a standard 25mm Ø OD pipe. The port is tapered to provide
a positive seal for the pipe. The maximum length of the exhaust port should be limited to 2 m.
The air inlet and exhaust pipes MUST NOT be glued to the detector ports.
Caution:
The inlet and exhaust port is fitted with a sealing plug for shipping to prevent accidental entry of
foreign objects. This plug MUST be removed for the detector to operate correctly whether the
exhaust piping is fitted or not.
2.3.7
Laser detection chamber
The Laser detection chamber is located in the rear of the enclosure behind the metal back panel. In the laser
detection chamber, a small portion of the sampled air passes through a laser beam. Presence of smoke
particles in the sampled air causes light scattering that is analyzed by the main processor card to determine
the smoke density or obscuration.
Caution:
The detection chamber is inaccessible, not serviceable and is NOT to be opened. The metal
back panel is NOT to be opened.
Caution:
If this cover is opened all warranties for the detector are void
2.3.8
Main processor card
The main processor card is located in the rear of the main enclosure behind the metal back panel.
Caution:
The main processor card is NOT user accessible. The metal back panel is NOT to be opened.
