FireGard Fire Doors
Cornell fire doors may be mounted in both face of wall or between the jambs configurations in both interior and exterior walls.
Approved wall types for the mounting of fire doors include brick, concrete, concrete masonry units or structural steel jambs. Wood or metal stud walls are not approved for the mounting of fire doors. Walls must be plumb and true with smooth surfaces on which to mount the doors.
Fire doors are designed to serve two purposes: allow access to certain building areas and to protect an area from the spread of fire. The closing of Cornell fire doors is initiated in several different ways. The most basic means is by the melting of a fusible link, which causes the door to become under balanced. Spring tension that is used to hold the door in the open position is suddenly released and the door closes due to gravity. During the closing of the door, a governing device is employed to control the rate of descent. The average closing speed may not be less than 6" per second or greater than 24" per second. To reset the door once the closing has been initiated, a qualified mechanic must re-open the door and apply the proper tension to the torsion springs.
* All Cornell fire products are provided with a multiple fuselink set-up to close the door automatically when any link melts. Standard fuselinks are designed to melt at 165* F and are to be located at the ceiling level above the fire door. Through wall fuselink configurations provide protection on both sides of the firewall opening. Reference NFPA 80 Standard for Fire Doors and Fire Windows for mounting arrangements. For units tied into an alarm system or local detectors, a fuselink set-up is still provided as a back up mechanical closing system.
Please read through the following descriptions of fire door systems to better acquaint yourself with the many options available on fire doors and decide which system will provide the greatest benefit to the end user.
Release Device Options
A release device is an electro-mechanical device that enables a rolling fire door to close in response to a signal from an alarm system, fire detector or power failure. The release device can close the door long before local temperatures are high enough to melt fuselinks. This is especially important when controlling smoke and other products of combustion. Release devises can be used on manually and electrically operated fire doors. They support one end of the fuselink chain assembly and their release has the same result as melting one of the fuselinks.
Cornell M58A-G Tri-voltage Release Device - Cornell's latest release device provides design flexibility in its ability to run off three different input voltages. Whether 120 or 24 V AC or 24 V DC current is required, this single device can be provided to work with the system. The device is fail-safe, normally energized releasing when de-energized. A time delay that is factory pre-set at approximately 10 seconds prevents premature release during short power lapses. The alarm circuit also has a pre-set 10 second delay. The time delay of each circuit can be adjusted between 3 and 45 seconds (with approval of the authority having jurisdiction).
Cornell M58-D Release device - For use in applications when a fail-safe device is not required. The device initiates release with applied voltage upon alarm detection. If power fails, the door will only close automatically upon melting of the fusible link. Available in 120 V AC only and should only be used when connecting to local smoke and heat detectors.
M100 FireGard System
The M100 is a revolutionary system for motorized fire doors that eliminates mechanical resetting and controls automatic closing speed, even on very large fire doors. Under normal conditions the M100 functions as a standard motorized door. When activated by a fire alarm signal, power failure or melting of the fusible link, the door closes without spring tension being released or the motor being disengaged. Local detectors or a central alarm system can be wired directly to the M100 operator to signal the door to close when in alarm eliminating the need for an external mechanical releasing device. When activated by an alarm signal, an electric sensing edge, which is required with the system, will stop the door if it contacts an obstruction and continue to close once the obstruction is cleared from the opening. The system is failsafe by design causing the door to close upon power failure. The doors close electrically or automatically at an average speed of not more than 9" per second. When closure is activated by power failure or fusible link, the electric sensing edge and door control station(s) are inoperable. Upon restoration of power, replacing the fusible link, or clearing the alarm, the doors shall be immediately reset by activating "open" on the control station. The door will fully open and is ready for normal or alarm activation.
This system is ideal for doors in recessed applications, for larger size fire doors, for fire products in areas prone to frequent power outages and for any unit where mechanical fire door testing is inconvenient.
Features
Available on fire doors up to 32' wide by 24' high
M100 fire doors are UL listed and FM approved
Benefits
Dependable automatic closing due to simplified design
Slower, safer closing speed - Uniform closing speed of approx. six
inches per second
Easy Testing - M100 fire doors can be tested quickly, safely and easily
Versatile - The M100 operator can be activated by fusible link, fire alarm systems or smoke detectors without the need for a mechanical release device
Options
10 second time delay before power outage closing
Single Test Panel for multiple doors
Automatic power open after alarm clears
M60 FireGard™ System
Like the M100, the M60 is a system for use with motorized fire doors that functions as a normal motorized door under normal conditions, but adds the benefit of eliminating mechanical fire door resetting during fire alarm system activation. Mechanical resetting is required after a prolonged power failure or for a complete system closing test.
The M60 FireGard System is designed to close the door electrically through the motor in immediate response to a fire alarm signal. In order to test the system, simply trip the fire alarm system or set off the smoke detector. The down circuit of the motor operator will automatically be activated and the door will close electrically. The sensing edge, which is required with the system, will stop the door if it contacts an obstruction and continue to close once the obstruction is cleared from the opening. Pushing the open button will cause the door to cycle to the fully open position and then immediately cycle back to the fully closed position. To reset the door, wait until the alarm signal clears and then simply activate the open control button. The door is ready for normal use or alarm activation. The system is failsafe with the use of a Cornell UL listed M58A-G release device, which is part of the closing system. In the event of a power failure for more than 10 seconds (adjustable between 3 and 45 seconds), the release device will initiate mechanical automatic door closing, which includes spring tension release. Mechanical resetting is required with this type of automatic closing. Complete system testing is required at least once a year, which will also require mechanical resetting.
Features
Control package is completely contained within the motor operator eliminating the need to mount a separate control panel
Available on standard gearhead and beltdrive operators
For use on UL listed and FM approved fire doors
Failsafe design
Benefits
Easy Testing - provides automatic closing while eliminating mechanical resetting upon alarm signals
Versatile - The M60 system can be activated by fusible link, fire alarm systems or smoke detectors or a prolonged power failure
FireGard EZ Test 'n Set
The EZ Test 'n Set combines the ease of testing / resetting and controlled automatic closing with manual chain operation on fire doors.
EZ Test 'n Set is a combination chain operator / controlled closing system that eliminates the need for complex spring release mechanisms and complicated reset procedures. The door is held open by a unique locking mechanism that is tied into a factory supplied padlockable guide mounted test handle and fuselink arrangement. Using the test handle or melting of the fusible link releases the locking mechanism, disengages the hand chain operator and engages the adjustable governing mechanism, all part of a compact operating and closing system. The door will close at a controlled rate of descent not to exceed 9" per second. To reset for normal chain operation, simply re-engage the test handle or replace the fusible link. EZ Test 'n Set can be tied into a fire alarm system or local detectors with the use of a release device. If activated by alarm signal, simply reset by reinserting the draw bar at the release device. The door is ready for normal use or emergency automatic closing.
This system is economically ideal for fire doors that do not require the convenience of a motor operator. Resetting is quick and easily performed by facility personnel. Access to the hand chain is required if guides are recessed in a wall.
EZ Test 'n Set is available for use with Rolling Fire Doors up to 168 sq. ft. for daily use or up to 256 sq. ft. on openings for fire protection only, maximum width is 24 ft., maximum height is 16ft.
Features
UL listed and FM approved
Adjustable governor
Padlockable floor level test handle (padlock provided)
Can be retrofitted to existing Cornell fire doors
Benefits
Spring tension is not released for automatic fire door closing
Fire door resets take only minutes to perform by facility personnel
Drop testing is easy with the floor level test handle
Downtime is minimal
No additional headroom is required for coil above ceiling applications
Annunciator Option
Cornell's M105A Annunciator is designed for use with an M58G release device and is activated automatically when the release device receives an alarm signal or looses power. The annunciator provides a visual and audible warning that the fire door is about to close. This warning occurs during the time delay and during actual door closing. The faceplate label reads "CAUTION Stand Clear Of Doorway," "Automatic Closing Fire Door Has Been Activated When Alarm Sounds And Light Flashes" and " This Doorway Is Protected By An Automatic Closing Overhead Fire Door, Stand Clear Of Opening At All Times." The flush mounted unit should be mounted at eye level in an easily visible location adjacent to the fire door opening.
Cornell Iron Works, Crestwood Industrial Park, Mountaintop, PA 18707. Tel: 570-474-6773; Fax: 800-526-0841.