Fire Alarm Automatic Door Release

Installed onto the bottom of the fire door in under five minutes dorgard is listening for a continuous fire alarm of 14 seconds or more.

Fire alarm automatic door release. This is really the best practice and we did look at alternatives before coming to this. The door access control reader and the electric lock can be wired to the fire alarm in a number of different ways. These fire rated door holders have an energized coil which creates a magnet strong enough to hold the self closing fire rated doors in the open position. We can use a relay to drop power to the electric lock or use an ip device that drops power using the network connection or add a power control box that drops power when the fire alarm system detects a fire.

Actuation of the fire alarm. The fire alarm system should have a secondary power supply to a standard as detailed in bs 5839. Dorgard is a wireless fire door retainer that holds open fire doors allowing them to automatically close on the sound of the fire alarm. The new sections allow the electromagnetic lock to be released by a door mounted release device i e.

On the fire alarm side you would need a control relay to intercept a switch leg of power to the door holder circuit as well as an initiating device such as a smoke detector to activate the relay. Automatic doors according to nfpa 80 3 3 6 3 3 7 an automatic closing door is a door that is normally held in the open position but closes when the automatic closing device is activated. The fire alarm audibility level at the position of any acoustically actuated device must be sufficient to ensure that the mechanisms will release the door upon the actuation of the fire alarm system. The automatic closing device is a device that causes the door to close when activated by a fusible link or detector.

Our system is linked directly to the fire alarm and test or live activation all the doors open regardless. 17 7 5 6 3 where smoke door release is accomplished directly from the smoke detector s the detector s shall be listed for releasing service. 17 7 5 6 2 smoke detectors that are used exclusively for smoke door release service shall be located and spaced as required by 17 7 5 6. I felt compeled to reply to this as we have the exact same systems in place.

No matter what the automatic means of smoke fire detection you use the release of one or more smoke doors is usually accomplished through an electromechanical device that holds the doors open until smoke is detected. Panic hardware touch sense bar or latch set with an integral switch which has an obvious method of operation under all lighting conditions and can be operated with one hand. When detection occurs the result is the mechanical or electromagnetic release of the door s.