Magnetic Door Hold Open Fire Alarm

For use with doors that already have a closer these holders keep doors open with an electromagnet.

Magnetic door hold open fire alarm.

Dropping door holder power with loss of ac voltage when designing a fire alarm system you may come across the need for magnetic door holders. The dorgards are great by the way but if the spec is magnetic door retainers they may want them as opposed to dorgards but if its high end property which a flat worth 3 5 mill is id expect a proper fire alarm in tbh a 2 zone panel is cheap enough and will give you the felxibility you need and give you extra income on repairs and servicing. The tri voltage design provides 35 pounds of holding force. The sentronic 7800 series magnet releases when the fire alarm panel enters an alarm condition and the electrical current is interrupted allowing the door to perform manually until power returns.

Door holders closers can play an important role in controlling smoke migration in a building. Mount the wall plate in an electrical outlet box or use a surface mount box sold separately. There are no codes nation or state wide that require doors to be held open. We offer a variety of magnetic door holder and magnetic fire door holder finishes including us28 luma sheen duranodic and gold.

All are reversible for right or left door swing directions. When activated by a fire alarm the magnet shuts off and releases the door. They provide a high holding force. Door holders are normally energized to magnetically hold doors open.

Owners and managers of buildings with fusible link hold open devices on fire. In the event of a power failure they release the door to a closed position to keep the facility secure. 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. Our cal royal magnetic door holders and magnetic fire door holders are ul listed for both the us and canadian market as well as approval from the california department of forestry and fire for the state of california.

With that said magnetic door holders are used as a convenience to hold doors open during normal operation. An ordinary door closer and an electromagnet powered by the building s fire alarm and smoke detector system. In the event of a fire emergency the fire alarm control panel or other compatible control means will release the magnet allowing the door to close to prevent the spread of smoke. Electromagnetic door holders and releasers keep doors open until they are released by fire alarm systems remote smoke detectors or other switching devices.