VLF-500 VESDA LaserFOCUS
The VESDA VLF-500 detector is a very early warning smoke detector designed to protect small, business-critical environments of less than 500 m2 (5,380 sq. ft.).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. In operation, the unique Smoke Dial TM display provides the user with an instant understanding of a smoke event, even from a distance. Should a fault occur, the user simply opens the field service door and activates the Instant Fault Finder feature to determine the specific fault condition.
- Features
- 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
- Offline/online configuration capability
- Up to 500 m2 (5,380 sq. ft.) coverage
| Input Power | Voltage: 24V DC Nominal (18-30 V DC) 410 mA nominal, 490 mA in alarm |
| 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 |
| Operating Conditions* | 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 | • 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 (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 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) |
| Interfaces | 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 |
| Display | • 4 Alarm State Indicators • Smoke Level Indicator • Reset, Disable and Test Control • Fault and Disabled Indicators • Instant Fault Finder • Smoke and Flow AutoLearn Controlss |
| Event Log | Up to 18000 events, time and date stamped in separate, nonvolatile, logs for: Smoke Level, Flow Level, Detector Status and Faults |
| AutoLearn Smoke & Flow | • Automatically set acceptable alarm thresholds for both smoke and flow levels • Minimum 15 minutes, maximum 15 days (default 14 days) • During AutoLearn thresholds are NOT changed from preset values |
| Warranty Period | 2 years |