Xtralis VLF-500 VESDA System

Fire Projects has successfully installed various VESDA VLF-500 system, which is a very early warning smoke detector designed to protect small, business-critical environments of less than 500 m2 (5000 sq. ft.)

The detector works by continually drawing air into sampling holes in a pipe network. The air is filtered and passed into a detection chamber where light scattering technology detects the presence of very small amounts of smoke.Detector status information is communicated on the detector display and via relays or optional interface cards.
The patent-pending Ultrasonic Flow Sensing used in the VLF provides a direct reading of the sampling pipe flow rate. The system is immune to air temperature and pressure changes and is unaffected by contamination. The VLF is the first air sampling smoke detector to use ultrasonic flow sensing.
• UL
• FM
• VdS
• ActivFire
• CE – EMC and CPD
• EN 54-20
– Class A (30 holes / 0.05% obs/m)
– Class B (30 holes / 0.15% obs/m)
– Class C (30 holes / 0.32% obs/m)
Classifi cation of any confi guration is determined using ASPIRE2.
Select Fire Projects for new implementation of VESDA – VLF series most effective way for very early smoke detection application for small to medium size datacenter, UPS room, medical facilities, and telecommunication facilities. We support our clients from Designing up to Commissioning up to AMC. We also provide AMC–Annual Maintenance Contracts for all types of Fire & security Systems. If you required new installation or AMC of VESDA system, contact Fire Projects today!
• Out-of-the-Box Installation and Commissioning
• Ultrasonic Airflow Sensing
• Laser-Based Absolute Smoke Detection
• Pre-engineered pipe network designs
• Programmable Alarm Thresholds
• Clean air barrier optics protection
• Instant Recognition Display
• Instant Fault Finder™
• AutoLearn™ Smoke
• AutoLearn™ Flow
• Field Service Access Door
• Multiple Event Logging in separate logs
• Event log – up to 18000 events
• Offl ine/online confi guration capability
• Up to 500 m2 (5000 sq. ft.) coverage*
  • Input Power Voltage:  24V DC Nominal (18-30 V DC)
    Current @ 24 VDC:  410 mA nominal, 490 mA in alarm
    Dimensions  (W x H x D) 256 mm x 183 mm x 92 mm
    Weight Approx.  2 kg (4.4 lbs)
    IP Rating  IP30
    Mounting  Upright, inverted or horizontal
    Operating Conditions:
    Ambient:  0°C to 39°C (32°F to 103°F) *
    Tested to:  -10°C to 55°C (14°F to 131°F)
    Sampled Air:  -20°C to 60°C (-4°F to 140°F)
    Humidity:  5% to 95% RH, non-condensing
    Sampling Network:
    Maximum pipe lengths:  1 x 50 m (150 ft) (Max. 24 holes)
    2 x 30 m (90 ft) per branch (Max. 12 holes per branch)
    Sampling Hole Options:  Pre-Engineered Option or Maximum Pipe length in accordance with Pipe Modelling Design Tool (ASPIRE2™)
    Air Inlet Pipe:
    Accepts both metric and American standard pipe sizes
    Metric: 25 mm (1.05 in.) American Pipe: IPS 21 mm (¾ in.)
    Area Coverage:
    Up to 500 m2 (5000 sq. ft.) depending on local codes and standards
    Relay Outputs:
    3 changeover relays (Fire 1, Action, Fault), Contacts rated 2A @ 30 VDC (max). NO/NC Contacts
    Cable Access:
    3 x 25 mm (11/16 in.) cable entries (1 rear entry, 2 top entry)
    Cable Termination:
    Screw Terminals 0.2-2.5 mm2 (30-12 AWG)
    Shown in Terminal Block Connections diagram, to right, plus an RS232 Programming Port. General Purpose Input (GPI) interface offers: Reset, Disable, Standby, Alarm set 1, Alarm set 2 and External Input functions.
    Alarm Threshold Setting Range:
    Alert, Action  0.025 – 2.00% obs/m (0.008 – 0.625% obs/ft)
    Fire 1, Fire  2 0.025 – 20.00% obs/m (0.008 – 6.25% obs/ft)
    Individual Alarm Delays 0 – 60 seconds
    Two Alarm Threshold Settings Either time or GPI based
    • 4 Alarm State Indicators 
    • Fault and Disabled Indicators
    • Smoke Level Indicator
    • Instant Fault Finder
    • Reset, Disable and Test Controls 
    • Smoke and Flow AutoLearn Controls
    Event Log:
    Up to 18000 events, time and date stamped in separate, non-volatile, logs for: Smoke Level, Flow Level, Detector Status and Faults
    AutoLearn Smoke & Flow:
    • Automatically set acceptable alarm thresholds for both smoke and fl ow levels
    • Minimum 15 minutes, maximum 15 days (default 14 days)
    • During AutoLearn, thresholds are NOT changed from pre-set values