ES&H Manual

Fire Protection Supplement


Chapter 4: Fire Protection System

Inspection, Testing, and Maintenance Procedure




Appendix 9:

Procedure for Testing

Very Early Smoke Detector Apparatus

(VESDA) Aspiring Smoke Detectors




1.0             Purpose


This document provides a procedure to conduct periodic testing of a fire-detection device required by NFPA 72 National Fire Alarm Code, 2019 Edition Table Device 17(7), (d).


2.0             Scope


This test will be performed ANNUALLY on each ionization or photoelectric smoke detector.


3.0             Planning


3.1              Notify the facility work coordinator using the approved electronic work control notification procedure. Allow one week for approval of the requested work and be prepared to reschedule the requested work to satisfy the areas production schedule.

3.2              Staff Required: 2

3.3              Time Required: 0.5 Hours

3.4              Equipment Required:

·               Manufacturer’s Manual (see ‘References’ section below)

·               Safe Guard Aerosol Smoke Tester

·               Stop Watch

·               Magnehelic Gauge (differential pressure measuring device)

·               ‘Stinger’ Reversible Vacuum with Tubing Adapter

·               VESDA LCD Programmer (LaserPLUS)

·               VESDA Data Sheet


4.0             Test Preparation


4.1              Establish the fire-detection system impairment using the Fire Protection Supplemental Chapter 5: Fire Protection System Impairment Procedure for detailed instructions on work planning, advanced notification, and administrative controls.

·         Post the ‘Fire Alarm Systems Testing in Progress’ notification signs.

4.2              Invite the SOTR to witness the test.

4.3              Evacuate hazard area of unnecessary personnel.

4.4              Station a knowledgeable technician at the Fire Alarm Control Panel (FACP); disconnect the building audible alarms at the FACP. The knowledgeable technician is to remain attentive at the FACP at all times that the audible alarms are disconnected.

·         In the unlikely event that an unanticipated fire alarm signal is received on the FACP, the technician must reconnect the building audible devices and join the building evacuation.


5.0             Conduct the Test


5.1              Record the detector head serial number and location on the attached data sheet.

5.2              Visually inspect the entire piping network, including hangers or supports. Check for mechanical damage or abnormalities.

5.3              Check the condition of the control panel batteries and charging circuit.

5.4              Perform the Gross Smoke Test.

5.4.1        Introduce aerosol smoke into the last sampling port of each branch.

5.4.2        Measure the elapsed time required for the respective display bar graph to illuminate 10 bar-graph segments.

5.4.3        Record the time on the attached data sheet.

5.4.4        Verify alarm conditions are indicated at the following locations:

·         associated agent release panel

·         building FACP

·         Fire Marshal’s pager

5.4.5        Place a "Tested" sticker on the detector housing with date and technician’s name.

5.5              Perform the Sampling Hole Air-Flow Verification Test.

5.5.1        Measure the suction pressure of the first and last sampling hole.

5.5.2        Record the suction pressure data on the attached data sheet.

5.6              Perform the Sampling Network Backflush.

5.6.1        Use the “Stinger” reversible vacuum with tubing adapter to backflush in accordance with the ‘Manufacturer’s Maintenance Requirements’ section of the reference document.

5.7              Conduct a System Performance Test (E70-D). What is this number referencing?

5.7.1        Lamp Test: Verify all control-system lamps illuminate steadily.

5.7.2        Detector Test: Verify that 8 to 8.5 bar-graph segments illuminate.

5.7.3        Alarm Setting: Verify the Alert, Action and Fire levels display on the bar graph.

5.7.4        Air Flow through the Detector: Verify the illumination of 5 bar-graph segments.

5.8              Check/Normalize Airflow Calibration (E70-D). What is this number referencing?

5.8.1        Scroll until the F-10 flow set/delay LED is illuminated. 

5.8.2        Verify the illumination of 5 bar-graph segments.  If above or below 5, reset the airflow signal by pressing the ‘Enter’ button.

5.8.3        If an AirFlow restriction of over 2 segments exists, clean the sample piping network and replace the air filter.

5.9              LaserPLUS:

5.9.1        Check airflow using the VESDA LCD Programmer.

5.10          Record data on attached data sheet.


6.0             System Restoration


6.1              Reconnect the building audible alarms at the FACP.

6.2              Dismiss assisting technician at the FACP.

6.3              Remove the ‘Fire Alarm Systems Testing in Progress’ notification signs previously posted.

6.4              Notify the SOTR that the tests are complete and system is on-line and operational.  Allow SOTR to verify that the system is in normal operating condition.

6.5              Allow personnel to return to the area previously designated as hazardous.


7.0             Conclusion


Upon completion of the procedure, the VESDA is on-line and operational.


8.0             References

·                     VESDA O & M Manual; Section 6 – MAINTENANCE

5.0             Revision Summary


Periodic Review – 01/03/19 – No changes per TPOC

Revision 0.1 – 06/02/16 – Periodic Review; minor edits

Revision 0.0 – 06/15/11 – Initial content











Fire Protection Department

Tim Minga





This document is controlled as an on line file.  It may be printed but the print copy is not a controlled document.  It is the user’s responsibility to ensure that the document is the same revision as the current on line file.  This copy was printed on 1/10/2019.