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How Do I Maintain a Fire Alarm System?

Once a properly designed and installed fire alarm system is in place in your building the most important single thing you can do to ensure reliable operability in the event of a fire is to inspect, test and maintain the system. National Fire Protection Association Standard 72, National Fire Alarm Code, identifies the component inspection and test methods required for all devices in the system. Your local jurisdiction may require different frequencies than the ones that are noted below.

Visual inspection frequencies include weekly, monthly, quarterly, semi-annual and annual activities. These generally can be performed by competent building maintenance personnel. In fact, it’s quite rare that a licensed fire protection company performs these inspections. Fireline can provide visual inspection training for maintenance personnel so that this important function is performed properly.

Functional testing must be performed by trained experienced personnel. Functional testing requirements are quite different from those for visual inspections. As the description implies, functional testing involves the actual operation of all devices in the system to ensure proper operation. Functional testing frequencies range from semi-annual to annual but the code notes that local authorities may require more frequent testing. A typical fire alarm testing contract includes annual testing for all fire alarm devices with semi-annual testing for certain sprinkler devices that send alarm or supervisory signals to the fire alarm system (supervisory signals indicate an “off-normal” condition of a device or subsystem).

Smoke detectors are tested using simulated spray smoke in the sensing chamber of the detector. Manual pull stations are operated by actually pulling the device. These devices (and all others) are required to initiate an alarm signal within a predetermined interval. When the system is in an alarm condition a technician will walk around to make sure all notification (horns, horn/strobe lights, bells, speakers, etc.) are operating properly. There are also various functional tests that must be performed on the control panel such as verifying proper receipt of trouble, supervisory, and alarm signals, batteries, digital communicator, annunciators and special suppression systems connected to the fire alarm system.

Semi-annual fire alarm testing is required for certain sprinkler system components connected to the fire alarm system. Control valve switches, more commonly known as “tamper switches” send a supervisory signal to the system when the valve is closed. Testing is done by closing the valve a prescribed distance to see if a signal is received. Waterflow switches are mechanical devices that sense water moving through sprinkler piping and initiate an alarm signal on the system. Water is flowed through the system using a valve opening called an inspectors test connection, simulating the flow of one sprinkler head.

Using a licensed fire protection contractor that employs NICET (National Institute for the Certification of Engineering Technicians) certified technicians is the best way to ensure the reliable operation of your fire alarm system. This is a critical factor to make sure your fire alarm system is there for you in the unlikely event of a fire.

This entry was posted on Thursday, May 28th, 2020 at 11:30 am. Both comments and pings are currently closed.