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ES&H
Manual Fire Protection Supplement |
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Chapter 4: Fire Protection System Inspection, Testing,
and Maintenance Procedure |
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Appendix 9: Procedure for Testing Very Early Smoke Detector Apparatus (VESDA) Aspiring Smoke Detectors |
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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, 2007 Edition Table 14.4.2.2 Device 14(g) and Table 14.4.5 Component 15(h).
2.0 Scope
This test is to be performed annually on each VESDA aspiring smoke detectors.
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)
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.
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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.
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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 Protection Engineer’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
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ISSUING
AUTHORITY |
APPENDIX
AUTHOR |
APPROVAL
DATE |
EXPIRATION
DATE |
REV. |
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Fire Protection Dept |
06/15/11 |
06/15/16 |
0 |
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