Norton Door Control
Norton Series 7900 Overhead Concealed Closer
Norton Series 7900 Overhead Concealed Closer - Page 4
Norton Series 7900 Overhead Concealed Closer
![]() A member of the Yale Security Group 7900 FEATURES
Concealed Transom Mounting: Closer is concealed in the header of aluminum or hollow-metal frames. Installation requires a minimum 4" (102mm) high frame header. A 2" x 4" dust cover is recommended and should be available from the frame supplier. Consult factory for wood header installations. Top Rail Mounted Slide Track: Slide Track is mounted into a recess prepared in the top rail of either wood, aluminum or hollow-metal doors. Installation requires a minimum of 1-1/2" (38 mm) top rail depth and a 1-3/4" (44mm) minimum door thickness. 790 Fire Bloc Door Liner: Available for use in 20 minute fire door assemblies where recognized by the local authority having jurisdiction. Standard Door Hanging Hardware: Closer and slide track can be installed on doors hung with butt hinges, offset pivots or center pivots. Hinges or pivots furnished by others. Concealed Arm: Closer arm is concealed when the door is closed. Shock Absorbing Door Stop: Non-Hold-Open units and Hold-Open units have a shock absorbing doorstop built into the slide track. Hold-Open: Position of hold open is changed by sliding mechanism in channel. The range of Hold-Open points is dependent upon how the door is hung: 85° to 125° for doors hung on butt hinges. 85° to 110° for doors hung on offset pivots. 85° to 100° for doors hung on center pivots. Adjustable Hold-Open Tension: Hold-Open tension can be increased or decreased by adjusting the tension on the slide track spring with a hex-key drive adjusting screw; or, hold open function can be totally eliminated by this same means. Door position switch is available. Refer to the security package. |






