I was invited to the installation of the Norton 2800ST Series Cam Action Door Closer onto a solid core wood door requiring a 100-degree maximum opening. This chosen door was in a high traffic corridor. According to the instructions, a 100-degree maximum opening locates the first hole for mounting the track at 5-1/8 inches from the centerline of the hinge. The installation provides information on installation up to a maximum of 110 degrees. For opening requirements greater than 110 degrees, contact the Norton factory.
For this installation, sex bolts were used to secure the door closer onto the solid core door. Because the door's core appeared to be compressed saw dust, using wood screws was not an option.
Four 3/8-inch diameter holes were drilled in order to sex bolt the closer body to the face of the door. We used four ¼-inch machine screws and metal sex bolts.
The slide track was mounted using a 13/64” (#7) diameter drill bit and a 1/4-20 tap to thread the screw holes in the 18 gauge metal jamb.
Once the closer and slide track were mounted onto the door, the arm was attached to the splined shaft. The splined shaft was inserted into the top of the closer having a five degree pre-load on the arm at the closed position. Pre-loading helps the door latch and close.
The final step is to attach the arm assembly to the slide block in the track assembly. Slide the arm stud into the slide block and secure by pushing in on the retainer clip until it is flush with the slide block.
Adjust the operation of the closer by setting the closing power control using a 5/8-inch diameter socket or wrench. Power increases in a clockwise direction. Once the door closes with sufficient force, adjust the closing cycle using the latch speed valve to (increase in a counterclockwise direction) to control the door speed in the Latch range (final five degrees). Then adjust the closing speed valve to (increase in a counterclockwise direction) to control the door speed in the Sweep Range (from opening to the final five degrees). Both the latch speed and the closing speed valves are adjusted using a 4mm hex wrench.
Note: Never back the adjustment valves all the way out. The oil will pour out and the closer will no longer function properly.
Test the operation of the door closer using a door gauge. To test the operation of a door closer, mark an “X” onto the closing face of the door at thirty inches from the hinge. Begin to measure the closing force at about six inches and check the force at three inches from the closed position. Make sure this adjusted and measured force required meets your local authority having jurisdiction and code requirements.
The Norton 2800ST Series Cam Action door closer is equipped with adjustable backcheck . The purpose of the backcheck is to slow and eventually stop the opening of the door in the last 10 degrees or more of the opening cycle. A backcheck should never be used in place of a proper doorstop. Remember: Never close a backcheck valve completely as this can result in damage to the door closer and/or hardware.
If the door closer slide track is equipped with optional hold open, it is possible to adjust the hold open power. This is accomplished by turning the adjustment shaft in the end of the slide track nearest the hinges. The provided 9/64-inch hex wrench is rotated clockwise to increase holding power.
A plastic cover comes standard with the Norton 2800ST Series Cam Action Door Closer. For security applications, a metal cover will be an available option. Contact the Norton factory for details. These door closers and slide tracks are available in all Norton standard and custom painted finishes. Contact the factory for availability of plated finishes.
For more information, contact your local locksmith wholesaler or Norton Door Controls, 3000 Highway 74 East, Monroe , NC 28112 . Telephone: 800-438-1951. Fax: 800-338-0965. Web Site: www.nortondoorcontrols.com.