Fire Alarm Automatic Door Release

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

Fire alarm automatic door release.

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. I felt compeled to reply to this as we have the exact same systems in place. The fire alarm system should have a secondary power supply to a standard as detailed in bs 5839.

We also have emergency door release boxes next to all affected doors. 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. 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. Parts 1 or 6.

The door access control reader and the electric lock can be wired to the fire alarm in a number of different ways. 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. Loss of power to the lock. 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.

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. Our system is linked directly to the fire alarm and test or live activation all the doors open regardless.

When detection occurs the result is the mechanical or electromagnetic release of the door s. 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 2 smoke detectors that are used exclusively for smoke door release service shall be located and spaced as required by 17 7 5 6.