VESDA VLF (LaserFOCUS) Aspirating Smoke Detector

Key Features
Laser Based Absolute Smoke Detection
Very Early Warning of a Potential Fire Incident
Wide Sensitivity Range
Dual Stage Dust Filtration
Programmable Alarm Thresholds
Reliable Airflow Monitoring
AutoLearn™ Smoke & Flow

Overview

VESDA VLF by Xtralis provides superior very early warning, air-sampling smoke detection for small, business-critical spaces such as switch rooms, server rooms and cabinets.

VLF aspirating smoke detectors continually draw air into it sampling chamber via discrete sampling holes in an aspirating pipe network. The air is filtered before entering the chamber, where light scattering technology detects even a very small amount of smoke. The detector communicates its status information on its intuitive ‘smoke dial’ display and via relays or optional interface cards.

VESDA VLF is available in two versions:

VESDA VLF-250

VESDA VLF-250 aspirating smoke detectors are designed to protect small, business-critical environments of less than 250 m2 (2,690 sq. ft.).

VESDA VLF-500

VESDA VLF-500 aspirating smoke detectors are designed to protect small, business-critical environments of less than 500 m2 (5,380 sq ft).

Smoke Dial Display

VESDA's unique Smoke DialTM display gives the user an instant understanding of a smoke event. Smoke DialTM uses a circular LED display and well-placed icons to provide a visual indication of smoke growth and alarm conditions, even from a distance.

In fault conditions, VESDA's Smoke DialTM display doubles up to provide VESDA's innovative 'Fault Finder' feature - a smart diagnostic feature that provides instant and meaningful information of the detector's status without the need for evaluation tools or additional programming. VESDA's Fault Finding feature allows fire and maintenance staff to be better informed before arriving on site, saving time and reducing maintenance costs.

Ultrasonic Flow Sensing

VESDA VLF is the first air sampling smoke detector to use Xtralis' patent-pending Ultrasonic Flow Sensing to provide a direct reading of the sampling pipe flow rate. This system immediately identifies and communicates any variances in the airflow and is unaffected by pressure and air temperature changes and is impervious to contamination.

Ease of Installation

VESDA VLF detectors provide out of the box installation and do not require a special interface or software programming tools

AutoLearnTM

VESDA's AutoLearn feature further assists the installation process by assessing environmental conditions and automatically setting acceptable smoke alarm and flow fault thresholds.

VESDA Software Compatibility

VESDA VLF detectors are fully supported by the VESDA System Configurator Software (VSC) which offers a high level of programming flexibility through its online and offline platform, and ASPIRE, that provides design wizards, isometric views, an automated design verification process and improved AutoBalance capabilities to simplify the design process.

Typical Applications

VESDA VLF aspirating smoke detectors provides very early warning air sampling detection for small areas such as:

  • Local Telecommunication Exchanges
  • Correctional Facilities
  • Smaller Server Rooms
  • Utility Control Hubs
  • Control Rooms
  • Railway Signal Hubs
  • Switch Rooms
  • Cabinets
  • Storage Facilities
  • Substations
  • Air-handling Units

Approvals

VLF-250 VLF-500
UL UL
ULC ULC
CCC CCC
FM FM
ActivFire ActivFire
CE CE
LPCB LPCB
VdS VdS
VNIIPO VNIIPO
NF NF

EN 54-20

- Class A (12 holes / 0.12% obs/m)
- Class B (12 holes / 0.35% obs/m)
- Class C (12 holes / 0.80% obs/m)

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)

Tech Specs

Input Power

  VLF-250 VLF-500
Voltage: 24V DC Nominal (18-30 V DC)
Current @ 24 VDC: 220 mA nominal, 295 mA in alarm 410 mA nominal, 490 mA in alarm

General

  VLF-250 VLF-500
Dimensions (W x H x D) 256 mm x 183 mm x 92 mm (101/16 in x 71/5 in x 32/3 in)
Weight Approx. 2 kg (4.4 lbs)
IP Rating IP30
Mounting Upright, inverted or horizontal
Event Log Up to 18000 events, time and date stamped in separate, non-volatile, logs for: Smoke Level, Flow Level, Detector Status and Faults
Warranty Period 2 years

Operating Conditions*

  VLF-250 VLF-500
Ambient: 0°C to 39°C (32°F to 103°F)*
Tested to (EN54-20): -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

  VLF-250 VLF-500
Maximum pipe lengths: 1 x 25 m (80 ft) (Max. 12 holes) 2 x 15 m (50 ft) per branch (Max. 6 holes per branch) 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 (ASPIRE™)
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 250 m2 (2,690 sq. ft.) depending on local codes and standards Up to 500 m2 (5,380 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)

Alarm Threshold Setting Range

  VLF-250 VLF-500
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

* Product UL listed for use from 0°C to 38°C (32°F to 100°F). ** Sampled Air temperature shall reach Ambient Detector temperature upon entry into Detector. Refer to Xtralis Design Guides & Application Notes for sampled air pre-conditioning.

Part Codes

VLF-250-00 VESDA VLF-250. European language set. English display labels
VLF-250-01 VESDA VLF-250. European language set. International display labels
VLF-250-02 VESDA VLF-250. English + Asian language set. International display labels
VLF-250-04 VESDA VLF-250. English + Russian language set. International display labels
VLF-250-05 VESDA VLF-250. English + Eastern Euro language set. International display labels
VLF-500-00 VESDA VLF-500. European language set. English display labels
VLF-500-01 VESDA VLF-500. European language set. International display labels
VLF-500-02 VESDA VLF-500. English + Asian language set. International display labels
VLF-500-04 VESDA VLF-500. English + Russian language set. International display labels
VLF-500-05 VESDA VLF-500. English + Eastern Euro language set. International display labels
VIC-010 VESDAnet Interface Card
VIC-020 Multifunction Control Card (MCC)
VIC-030 Multifunction Control Card (MCC) with Monitored Powered Output (MPO)
VSP-005 Filter Cartridge
VSP-722 Aspirator for VESDA VLF-250
VSP-715 Aspirator for VESDA VLF-500

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