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 protections.
- Instant recognition display.
- Instant Fault Finder™.
- AutoLearn™ Smoke.
- AutoLearn™ Flow.
- Field service access door.
- Multiple event logging (in separate logs), up to 18,000 events.
- Offline/online configuration capability.
TECHNICAL SPECIFICATIONS
Models :
- VLF-250 : 250 m2
- VLF-500 : 500 m2
- Voltage : 24V DC Nominal (18-30 V DC)
- Current @ 24 VDC : 410 mA nominal, 490 mA in alarm
- VLF-250 (250 m2) : 220 mA nominal, 295 mA in alarm
- VLF-500 (500 m2) : 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
- 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
- Maximum Pipe Lengths :
- VLF-250 (250 m2) :
- 1 x 25 m (80 ft) (Max. 12 holes)
- 2 x 15 m (50 ft) per branch (Max. 6 holes per branch)
- VLF-500 (500 m2) :
- 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 (ASPIRETM)
- Air Inlet Pipe : Accepts both metric and American standard pipe sizes Metric: 25 mm (1.05 in.) American Pipe: IPS 21 mm (3⁄4 in.)
- Area Coverage :
- VLF-250 : Up to 250 m2 (2,690 sq. ft.) depending on local codes and standards
- VLF-500 : 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 (1.05 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 Controls
- Fault and Disabled Indicators
- Instant Fault Finder
- 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 ow levels
- Minimum 15 minutes, maximum 15 days (default 14 days)
- During AutoLearn thresholds are NOT changed from pre-set values
- Warranty Period : 2 years
APPLICATIONS
The Xtralis VESDA VLF is a cost-effective solution for areas such as:
- Local telecommunication exchanges.
- Air handling units.
- Smaller server rooms.
- Correctional facilities.
- Control rooms.
- Utility control hubs.
- Switch rooms.
- Railway signal hubs.
- Storage facilities.
- Cabinets.
- Hazardous areas (Class 1 Div 2).
- Substations.
DATASHEET
VLF-250.pdf
