For this article, I was invited to the installation of a SafeZone door closer onto the exterior door of a medical facility that has a pharmacy just inside. The right hand outswing narrow stile glass aluminum door is set into a glass aluminum wall. An electrical room is approximately 45 feet away from the doorway. The first floor of the building has a drop ceiling. However, the wall extending perpendicular from the hinge side of the doorway is a firebreak wall. The doorway of the building is adjacent to parking and is used by employees, patients and families. During the installation, there was a good deal of traffic as the ladder had to be moved about every seven to ten minutes to allow people access and egress.
Note: Always make sure the door is operating properly prior to installing any hardware. If the door scrapes on ground or will not properly fit the opening, installing a SafeZone or any lock hardware will not solve the problem. Fix whatever is necessary in order for the door to operate properly, and then install.
The Norton 7100SZ Series SafeZone is available in different configurations. Ordering is by configuration, starting with whether the unit will be mounted onto the Pull or Push Side of door. Then specify the Closer Size, whether the unit is mounted onto a Right Hand (Left Hand Reverse) or Left hand (Right Hand Reverse) door. Voltage options are 24VDC or 120VAC. The SafeZone is available with an Aluminum, Statuary Bronze, Dull Bronze, Black, Medium Amber or Gold finish. If the closer is ordered for a Pull Side of door application, the unit comes with one of two slide arm and track options. Three spring sizes (3, 4, 5) are gauged by the door width (up to 48”).
The SafeZone is approximately 28 inches long. The closer body, circuit board and the motion sensor are mounted onto an aluminum back plate.
The installed SafeZone was a model 7123SZ Right Hand 24VDC in the 689 Aluminum finish. The “2” indicates a push side application. The double lever arm accommodates a 2-3/4”-4” reveal for a door opening up to 180 degrees or a 4”-7” reveal for a door opening up to 165 degrees. The “3” indicates the spring size for a door up to 42”.
The power requirement of the Norton SafeZone is minimal. For 24VDC operation, the amperage draw does not exceed .086 Amps.
For this installation, a Securitron BPS-12/24-1 Dual Voltage Boxed Power Supply was installed. The BPS-12/24-1 is a UL Class 2 listed power supply that supplies one full AMP continuous filtered and regulated current output. It allows for wire runs without the use of conduit from power supply to the door.
Note: The SafeZone requires a minimum of 3-½” clearance from the bottom of the header.
The SafeZone was mounted onto the interior side of the right hand door. The installation was straight forward, having the benefit of a drop ceiling to simplify the wire run from the Electric Room to the top of the aluminum glass wall directly above the hinge side of the door. The decision was made to do a “clean” installation, concealing the wiring. Although there is always an option, a “clean” installation is best.
The aluminum glass wall provided the benefit of a hollow rectangular aluminum hinge jamb through which the 18 Gauge four conductor cable was run. Once the Securitron BPS-12/24-1 Power Supply was installed in the electric room, the four conductor 18 gauge cable was run through the drop ceiling to the glass aluminum wall.
The rectangular aluminum section extending above the vertical jamb enabled the cable to be run from above the drop ceiling down into the door header. Three holes were drilled to provide access. The first hole, ½” in diameter, provided entry into the top of the extruded aluminum rectangular tubing. The second hole 3/8” in diameter, and third hole, one inch in diameter, were drilled into the header. Since this installation was not into a fire rated opening, a one inch hole could be drilled. Note: For fire rated openings, a 7/8” hole would have been drilled.
The second hole was used to capture the cable and change the direction from vertical down to horizontal into the header. The third hole provided an exit and entry through the electrical hole in the back plate. From there three wires (red, green and black) made the electrical connection. The three holes are not visible once the installation has been completed.
To provide the greatest possible adjustability, the unit was installed having a door opening angle of 100 to 180 degrees.
To install the SafeZone onto the header, five ¼-20 screw holes were drilled and tapped into the aluminum header. Two holes were drilled and tapped into the door’s top rail for the shoe. A #7 drill and a ¼-20 tap were used to prep the installation.
Specific security concerns are controlled access to specialized areas, supply rooms and medical carts, especially to control the access to medications, drugs, syringes, and needles.
A Norton 5900 Series X-in is installed onto the corridor doorway of a handicap-designated hospital room.