Below is the method statement for the installation of fire alarm system which can be modified for different type of systems like HSSD or Vesda etc. The steps are very general and should be customized depending upon the project specific requirements, specifications and applicable NFPA or other standards.
Wiring & Connections
Verify that hardware and devices are NRTL listed for use with fire-alarm system before making connections.
Make addressable connections with a supervised interface device to the following devices and systems. Install the interface device less than 3 feet (1 m) from the device controller. Make an addressable confirmation connection when such feedback is available at the device or system being controlled.
- Alarm-initiating connection to smoke-control system (smoke management) at fire-fighter smoke-control system panel.
- Alarm-initiating connection to stairwell and elevator-shaft pressurization systems.
- Smoke dampers in air ducts of designated air-conditioning duct systems.
- Alarm-initiating connection to elevator recall system and components.
- Alarm-initiating connection to activate emergency lighting control.
- Alarm-initiating connection to activate emergency shutoffs for gas and fuel supplies.
- Supervisory connections at valve supervisory switches.
- Supervisory connections at low-air-pressure switch of each dry-pipe sprinkler system.
- Supervisory connections at elevator shunt trip breaker.
- Supervisory connections at fire-pump power failure including a dead-phase or phase reversal condition.
- Supervisory connections at fire-pump engine control panel.
Installation Procedure / Method Statement
The devices/peripherals (Smoke detectors, heat detectors, break glass, duct detectors, beam detectors, control and monitoring modules) are connected in Class A circuit with the Control panels.
The speakers & speaker with strobes are connected in Class A circuit with the Control panels.
2 Core 1.5mm2 FP 200 cable to be used for cabling the Initiating Device Circuits (IDC) to the panel, additional 2c x 2.5mm2 FP200 cable is required for the smoke detector with sounder base for the activation of the sounders units.
2 core 1.5mm2 FP 200 cable to be used for cabling the Speakers with the panel, additional 2c x 2.5mm2 FP200 cable is required from the FACP for the speaker with strobe for the activation of the strobe unit allied in vertical walls the run of conduit will be kept straight.
Comply with NFPA 72 for installation of fire-alarm equipment.
Smoke- or Heat-Detector Spacing:
- Comply with NFPA 72, “Smoke-Sensing Fire Detectors” & “Heat-Sensing Fire Detectors”.
- Smooth ceiling spacing shall not exceed 30 feet (9 m).
- Fire-Alarm Control Unit: Surface mounted, with tops of cabinets not more than 72 inches (1830 mm) above the finished floor.
- Annunciator: Install with top of panel not more than 72 inches (1830 mm) above the finished floor.
Battery Charger Faults:
Battery Charger Faults that can arise during the operational lifetime of a panel. You may observe one of the following Faults; Charger 2% out of range Battery Charger Supply incorrect to correctly measure the output voltage you will need to follow the steps below.
- To prevent damage to the system, disconnect the batteries & power down the system, disconnect the power & harnesses from the Power Supply.
- Connect the Multi-meter to the battery leads (with batteries disconnected), power up & measure the voltage. Calculate the difference between the measured voltage & 27.6v. NOTE: After 90 seconds, the voltage will drop to <24v. If this happens, power down & start again.
Positive/Negative Earth Ground Faults:
Fire Panels have the ability to detect positive or negative Earth Ground Faults. An Earth Ground Fault occurs when an electrical circuit is shorted to ground
Inspection, testing and commissioning
All inspection and testing for fire alarm system shall be carried out in accordance with specifications. Work shall be carried out by the experienced site team under the guidance of engineer and shall further be checked and approved by quality engineer.
a) Check the materials are approved.
b) Check for any damage or defects, name plate details
c) Check all devices installed as per the specifications & Drawing.
d) Visual Inspection: Conduct visual inspection prior to testing.
e) Inspection shall be based on completed and approved drawings and system documentation as per NFPA.
f) Comply with “Visual Inspection Frequencies” Table in the “Inspection” Section of the “Inspection, Testing and Maintenance” Chapter in NFPA 72; retain the
g) “Initial/Reacceptance” column and list only the installed components.
h) System Testing: Comply with “Test Methods” Table in the “Testing” Section of the “Inspection, Testing and Maintenance” Chapter in NFPA 72.
i) Test audible appliances for the public operating mode according to manufacturer’s written instructions. Perform the test using a portable sound-level meter complying with Type 2 requirements in ANSI S1.4.
j) Test audible appliances for the private operating mode according to manufacturer’s written instructions.
k) Test visible appliances for the public operating mode according to manufacturer’s written instructions.
l) Factory-authorized service representative shall prepare the “Fire Alarm System Record of Completion” in the “Documentation” Section of the “Fundamentals of Fire Alarm Systems” Chapter in NFPA 72 and the “Inspection and Testing Form” in the “Records” Section of the “Inspection, Testing and Maintenance” Chapter in NFPA 72.
m) Re-acceptance Testing: Perform re-acceptance testing to verify the proper operation of added or replaced devices and appliances. Test all the field loop devices with the control panel.
n) Check the detectors with the artificial test smoke spray. Use forms developed for initial tests and inspections.
p) Field tests shall be witnessed by authorities having jurisdiction.
q) Manufacturer’s Field Service: Engage a factory-authorized service representative to inspect, test, and adjust components, assemblies, and equipment installations, including connections.
r) Perform tests and inspections.
s) After testing & commissioning provide training demonstration to facility management team.
t) Conduct Cause effect inspection as per programmed cause & effect matrix. Test all the connected devices responds as per the matrix.
u) Identify system components, wiring, cabling, and terminals. Comply with requirements for identification specified in specifications.
v) Install framed instructions in a location visible from fire-alarm control unit.