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VESDA VLC-400 Product Guide

VESDA by Xtralis

14

www.xtralis.com

Figure 2-6: Xtralis VSC Smoke Threshold Tab

2.5.7

Digital value reporting

The digital value used to indicate the obscuration level reported to the fire panel is dependent on the type of
detector set.

The calculation used is:

V = (T - F) * O/A + F

Where:

l

V = The analogue value limited to a maximum value of 127

l

F = The fault threshold (11 for optical and 23 for aspirating)

l

T = Apollo loop alarm threshold is 55

l

O = The current smoke obscuration reading

l

A = The alarm obscuration level (from the sensitivity mode data)

2.5.8

Delays

Smoke level that exceeds the current Alarm threshold is held off until the delay period has expired.

When the device goes into alarm the reported obscuration level will be 54 counts until the delay period for the
selected sensitivity mode has expired or until the obscuration level goes out of alarm (whichever comes first).
At this point the current obscuration level is then reported (refer to Figure 2-7).

Figure 2-7: Delay and Obscuration Level Reporting

Figure 2-7 shows the detector to holding the reported alarm level until the device has been polled and the alarm
reported to the panel. Additionally, an alarm level will be reported to the fire panel via three consecutive
addressed polls.

Summary of Contents for VESDA VLC-400

Page 1: ...VESDA VLC 400 Product Guide June 2014 Document 03494_11 Part Number 18938...

Page 2: ......

Page 3: ...equipment damage Xtralis is not responsible and cannot be held accountable for any liability that may arise due to improper use of the equipment and or failure to take proper precautions Only persons...

Page 4: ...iption Caution This icon is used to indicate that there is a danger to equipment The danger could be loss of data physical damage or permanent corruption of configuration details Warning This icon is...

Page 5: ...equipment does cause harmful interference to radio or television reception the user is encouraged to try to correct the interference by one or more of the following measures re orientate or relocate t...

Page 6: ...less than 60 seconds l For a Class B detector hole sensitivity must be better than 4 5 obscuration m and transport time less than 90 seconds l For a Class C detector hole sensitivity must be better th...

Page 7: ...to installation 25 7 2 Mounting the detector 25 7 3 Removing the front cover 25 7 4 Remove plastic plugs for cable entry 25 7 5 Fastening the mounting bracket 26 7 6 Mounting the Detector onto the Bra...

Page 8: ...VESDA VLC 400 Product Guide VESDA by Xtralis 2 www xtralis com This page is intentionally left blank...

Page 9: ...being that it communicates directly on the Apollo loop VESDA VLC detectors provide Very Early Warning of potential fire conditions by drawing air samples through 25mm pipe up to 80m long two pipes of...

Page 10: ...VESDA VLC 400 Product Guide VESDA by Xtralis 4 www xtralis com This page is intentionally left blank...

Page 11: ...Legend A Front Cover B LED Indicators C Securing Screws D Main Enclosure Figure 2 1 VESDA VLC 400 2 2 Front Panel The front panel is removable and is secured to the main enclosure with two screws loc...

Page 12: ...ot be controlled by the detector FLOW This YELLOW LED illuminates when there is flow fault FAULT This YELLOW LED illuminates when a fault condition occurs This includes a flow or filter fault The LED...

Page 13: ...2 3 6 l Aspirator refer to Section 2 3 4 l Cable entry ports refer to Section 2 3 2 l Air inlet port with air flow sensor refer to Section 2 3 3 l Main processor card refer to Section 2 3 8 Each of th...

Page 14: ...tions Figure 2 3 Termination Card Layout VESDAlink programming interface The VESDAlink programming interface is via a standard DB9 connector on the termination card This connection provides a RS 232 s...

Page 15: ...ng 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 4 Aspirator The aspi...

Page 16: ...pered 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...

Page 17: ...tical type detector 2 4 5 AutoLearn AutoLearn is the process of monitoring the average smoke obscuration levels in an environment in order to automatically set alarm thresholds that are appropriate Th...

Page 18: ...tical Type Smoke Analog Value 11 to 127 Alarm at 55 23 to 127 Alarm at 55 Fault Analog Value 8 8 to 10 not used 8 8 to 22 not used Drift Value 0 16 Type Bits 2 1 0 4 3 7 6 5 2 1 0 4 3 7 6 5 1 0 0 1 1...

Page 19: ...2 m 0 06 ft 10 secs Mode 4 0 5 m 0 15 ft 10 secs Mode 5 1 0 m 0 31 ft 10 secs Table 2 3 Default Sensitivity Modes Where the FACP supports timed mode selection i e selecting different modes at differen...

Page 20: ...l from the sensitivity mode data 2 5 8 Delays Smoke level that exceeds the current Alarm threshold is held off until the delay period has expired When the device goes into alarm the reported obscurati...

Page 21: ...VESDA by Xtralis VESDA VLC 400 Product Guide www xtralis com 15 3 Dimensions The physical dimensions of the VESDA VLC 400 detector are shown below Figure 3 1 Dimensions Front Side Views...

Page 22: ...VESDA VLC 400 Product Guide VESDA by Xtralis 16 www xtralis com 205mm 8 07in 225mm 8 86in 112 5mm 4 43in 95mm 3 74in 225mm 8 86in 112 5mm 4 43in Figure 3 2 Dimensions with Mounting Brackets Rear View...

Page 23: ...itoring Monitored input requires a 47kOhms EOL resistor A short circuit PSU fault or an open circuit wiring fault is reported as fault 15 on Xtralis VSC IP Rating IP 30 Cable Access 4 x 25mm 1in cable...

Page 24: ...VESDA VLC 400 Product Guide VESDA by Xtralis 18 www xtralis com This page is intentionally left blank...

Page 25: ...ampled Generally Xtralis recommends a maximum coverage of 0 2m per sampling hole For example a grille measuring 1 5m x 0 8m would need 6 sampling holes refer to Figure 5 2 When sampling across a grill...

Page 26: ...0 2 obs m Using ASPIRE2 it is possible to determine the Class of many different configurations of holes and pipework It is also possible to estimate the Class by considering the additional information...

Page 27: ...te any likely movement For example ABS pipe expands by 0 1 with every 10 C increase in temperature l All joints must be airtight this is typically achieved on plastic pipe using suitable adapters and...

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Page 29: ...l as shown in the table Parameter Default Value Minimum Access Level Units Metric Adm Airflow High Urgent 130 Adm Airflow High Minor 120 Adm Airflow Low Minor 80 Adm Airflow Low Urgent 70 Adm AutoLear...

Page 30: ...VESDA VLC 400 Product Guide VESDA by Xtralis 24 www xtralis com This page is intentionally left blank...

Page 31: ...the detector with the air inlet pipe at the top of the box and with the air exhaust pipe at the bottom known as the Normal Orientation or l Mount the detector with the air inlet pipe at the bottom of...

Page 32: ...e detector is in place Insert the sampling pipe into the inlet port ensuring a firm fit and where relevant connect the exhaust pipe Fit appropriate conduit or cable clamps as required 7 7 Connecting t...

Page 33: ...the device operating voltage range of 18VDC to 30VDC Damage may occur if more than 30VDC is applied 7 8 2 Using cable glands Run the wires through the conduit or cable clamps where necessary and into...

Page 34: ...to 82 set the DIP switch as shown in Figure 7 5 below see NOTE above Figure 7 5 DIP Switch Setting for Address 82 2 16 64 Section 12 shows the DIP switch settings for each of the possible 127 address...

Page 35: ...normalization operation must be performed to eliminate this fault Refer to Section 8 6 for a description of the normalization process 8 5 Setting smoke thresholds The smoke threshold is set using Xtr...

Page 36: ...he Normalization option is selected a prompt appears Normalization telling you that it will take 11 minutes to complete Are you sure you want to continue Click Yes 5 When Normalization starts the OK L...

Page 37: ...lly once AutoLearn is complete 8 7 1 Using AutoLearn The AutoLearn function is started from Xtralis VSC by selecting the Start AutoLearn Smoke tab from the device menu From this form refer to Figure 8...

Page 38: ...VESDA VLC 400 Product Guide VESDA by Xtralis 32 www xtralis com This page is intentionally left blank...

Page 39: ...possible use Xtralis VSC to read the airflow readings including the raw airflow readings Any sign of drift should be investigated Check filter Every year Check that there are no filter faults where p...

Page 40: ...Cartridge B Screw Figure 9 1 Air Filter Cartridge Location Remove the air filter cartridge A switch operates when the filter is removed and the fault Filter removed is reported in the Event log for th...

Page 41: ...nt 10 Push aspirator upward H and remove Legend A Screws B Termination Card C Interface Card Connector D Aspirator Hose E Aspirator Pipe F Screws G Aspirator H Aspirator Removal Figure 9 2 Aspirator R...

Page 42: ...VESDA VLC 400 Product Guide VESDA by Xtralis 36 www xtralis com This page is intentionally left blank...

Page 43: ...over fault reporting 10 1 2 Faults list A more comprehensive list of faults is available via the PC connector port using a PC running Xtralis VSC The table below lists the VESDA VLC 400 applicable fa...

Page 44: ...sentative for a replacement detector Minor 15 Power supply failure The source supplying AC power has failed Check the power supply and restore If it is not indicating a fault check the wiring If the f...

Page 45: ...e the data has been detected as being corrupt Contact your authorized Xtralis representative Urgent 51 Urgent high airflow The airflow exceeds the Urgent High threshold Inspect pipe work for breakages...

Page 46: ...ween the protected area and the detector that exceed 50Pa Ensure that there are enough sampling holes the minimum for standard configurations is 3 holes Ensure the exhaust bung is removed Introduce ba...

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