Sometimes it is better to keep an interior door propped open because of the amount of foot and cart traffic, than to force everyone to open the door. Unfortunately, because of code requirements, fire doors cannot be held open using a door closer with hold-open function, a door stop or drop down...
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Like the magnetic door holders, the SensaGuard 280 can also be manually released for times when the door needs to be closed and then opened by pressing the “Test” button. There is a Hold Open Tension Adjustment Screw. Turning this screw clockwise increases the holding force on the slide block.
Prior to installing the SensaGuard 280, the instructions indicate to install the 9 volt battery and ready the unit for operation. Once the battery and cover are installed, press the and hold the “Reset” button for two seconds. The motor should momentarily run. The LED should flash once every 40 seconds.
Installation of the Glynn-Johnson SensaGuard 280 is not difficult, the unit is mounted onto the secure side of the door. For push side installations, the unit is mounted beneath the jamb stop using three mounting screws. When installed onto the pull side of the door, the unit is mounted onto the face of the jamb using two long mounting screws. The arm bracket is designed to be mounted onto the door using the supplied sex bolts.
The SensaGuard 280 can be installed on door equipped with concealed and surface-mounted door closers. The unit is designed to be mounted onto the side opposite a door equipped with a surface mounted door closer.
For this installation, the closer is on the opposite side of the door. We installed machine screws. If not, the door closer would have to be removed and reinstalled with the possibility of having to make modifications to accommodate the sex nuts. The second, more important reason is that the door has reinforcement to accommodate the door closer on both sides. Threading machine screws through the door skin and the reinforcement is sufficient to properly connect the arm bracket.
To determine the location of the arm bracket, measure the “A” dimension for the first hole in the arm bracket, down 2-5/8” from the header stop. To simplify drilling and tapping, Lawson Regency Combination Drill-Tap was used to install the arm bracket. The forward portion of the ¼-20 bit is ground as a high speed twist drill. The middle portion of the drill is machined to tap the hole. The Made in the U.S.A. bits have a reduced neck for additional clearance and a 118-degree spiral point.
For this installation, the door was open a little more than 90 degrees. This is sufficient to not contact the rear wall, but open enough to provide easy access and egress. For 180-degree installations, reposition the arm bracket onto the hole closest to the hinge to accommodate the longer reach. For the 90-degree installation, no change is required.
Install the arm bracket onto the door. Open the door, making sure the slide block moves into the latched position. Press the “Reset” button while holding the door open. The slide black should be held in place. If not, adjust the hold-open tension adjustment screw clockwise.
Press the “Test” button to release the slide block. If it does not release, adjust the hold open tension a
After each test, open the door and press the “Reset” button. Test this operation several times.
Once the unit is installed, test the electronics by lighting a match beneath the ionizing chamber. The slide block should automatically release and the door should close. A held open door will release automatically when smoke is detected. It is necessary to push the reset button after the smoke clears the chamber. This will re-arm the holder mechanism.
To ensure fail-safe operation, the SensaGuard Series 280 automatically releases the door when battery power drops below 7.2 volts or if the battery cover is removed.
The Glynn-Johnson SensaGuard Series 280 is available in a US28 clear anodized aluminum and 313AN Dark Bronze anodized aluminum finishes.
For more information, contact your local locksmith distributor or Glynn-Johnson, 2720 Tobey Drive, Indianapolis, IN 46219. Telephone: 877-613-8766. Technical Support 888-371-7331. Web Site: www.glynn-johnson.com.
For drill-tap information, contact Lawson Products Inc., 1666 E. Touhy Ave., Des Plaines, IL 60018. Telephone: 866-529-7664. Web Site: www.lawsonproducts.com.
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