Fire Alarm Door Holder Wiring

Electromagnetic door holders and releasers keep doors open until they are released by fire alarm systems remote smoke detectors or other switching devices.

Fire alarm door holder wiring.

They must be used in conjunction with closing devices. Fire smoke barrier doors door releases when tripped by an alarm or smoke detector private offices door releases when triggered by a remote switch. Fire alarm door release power supply installation instructions important notes these instructions should be read carefully before installation of the equipment. Electromagnetic door holder releases are designed for virtually any remote door release applications.

The door holder is an electromagnet a door holder prevents the door from closing because it hangs onto the door using magnetism. Both versions are supplied with a door mounting keeper plate. They provide a high holding force. For use with doors that already have a closer these holders keep doors open with an electromagnet.

The magnetic portion of this device is installed on the wall that meets the open fire door now to tie this whole concept together you will. Mount the wall plate in an electrical outlet box or use a surface mount box sold separately. All are reversible for right or left door swing directions. 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.

When the fire alarm system detects smoke the current to the door holder turns off allowing the door to close. The following are some examples of how you can wire door holders with pros and cons to each example 1. Both door holders are fitted with an integral manual release button allowing the door to be closed without operating the fire alarm. This is a piece of class 1 equipment and must be earthed 3.

To close fire doors in an emergency and prevent the spread of fire and smoke. Depending on your fire alarm installation you may need to install a magnetic door holder at the location of each fire door. En1155 1997 cpd approved floor mounted 24v dc door holder 04390 41. When activated by a fire alarm the magnet shuts off and releases the door.

Wiring them depends on what smoke heat alarms you have in if you have a fire panel unlikely in domestic unless landlord flats then use the open on alarm volts free relays to drop power to magnets if you have mains smoke heat detectors then they need to have an auxillary volts free output so you can use it again to drop power from magnets on alarm. Often this is done on a global basis any alarm will drop power to all door holders but sometimes the door holders may be controlled in groups. Wire these holders directly into your fire alarm system. With that said magnetic door holders are used as a convenience to hold doors open during normal operation.

A magnetic door holder is a relatively simple device that when powered typically by 24vdc or 120vac will create a magnetic pull. There are no codes nation or state wide that require doors to be held open. In the event of a power failure they release the door to a closed position to keep the facility secure. This equipment must be installed and maintained by a suitably skilled or technically competent person.