Fire Alarm Automatic Door Release

The new sections allow the electromagnetic lock to be released by a door mounted release device i e.

Fire alarm automatic door release.

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. 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. This is really the best practice and we did look at alternatives before coming to this. Loss of power to the lock.

The automatic closing device is a device that causes the door to close when activated by a fusible link or detector. 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. Actuation of the fire alarm. Dorgard is a wireless fire door retainer that holds open fire doors allowing them to automatically close on the sound of the fire alarm.

Parts 1 or 6. 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. 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. The door access control reader and the electric lock can be wired to the fire alarm in a number of different ways.

When detection occurs the result is the mechanical or electromagnetic release of the door s. The fire alarm system should have a secondary power supply to a standard as detailed in bs 5839. 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. 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.

We also have emergency door release boxes next to all affected doors. I felt compeled to reply to this as we have the exact same systems in place. 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.