Norton Series 7900 Overhead Concealed Closer - Page 3

A member of the Yale Security Group

7900 GENERAL INFORMATION

ANSI/ BHMA/ Federal Specs

For a cross reference of Norton Series 7900 Door Closers to ANSI/BHMA/Federal FF-H-121D or FF-H-121c Specifications, see the Specification Comparison Chart in the General Information Section of this Catalog.

U.L. Listing

Norton Series 7900 Door Closers with non hold-open feature are listed by Underwriters' Laboratories, Inc. for use with labeled hollow-metal-doors and frames.

WHI Listing

The Norton 790 Fire Bloc door liner is listed with Warnock Hersey International for use in 20 minute fire doors that are listed with WHI, when used with the Series 7900 door closer.

The combination of a Series 7900 door closer installed in a U.L. labeled hollow metal-door frame and a Norton Number 790 Fire Bloc installed in a WHI labeled 20 minute fire door, which has the tested preparation, may qualify as a 20 minute fire door assembly. Always consult local authorities to determine the acceptance and proper application of fire door and hardware applications.

Available Finishes

Sprayed Finishes - All Norton Series 7900 Closers are available in the following sprayed finishes. Order sprayed finishes by the Norton Symbol.

*Available at extra cost. Closers can be ordered prime coated only. i.e. (SRI), or prime coated with finish coat. i.e. (SRI) x (DB).

Suggested Specification

Closers for __________________ exterior (and) interior doors shall be full rack-and-pinion type with cast aluminum alloy shell. Closers shall be concealed in a 4" (102 mm) high frame header. The slide track shall be concealed in the top rail of the door. (Closer shall be provided with a fire-blocking door liner to permit installation in 20 minute fire door assemblies.) Closer, arm and slide track shall be completely concealed when the door is closed. Hydraulic fluid shall be non-gumming and non-freezing. Closer shall have (four) (five) noncritical valves, hex-key-operated, to independently regulate sweep speed, latch speed (backcheck position and backcheck cushioning)(and delayed action closing). (Closer shall have power adjustment to permit a 50% increase in power over the minimum closing force for any size.) (Closer shall conform with Accessibility Code specifications.) Degree of stop is adjustable in field by slider.

Hold-Open mechanism shall be capable of disengagement when holding function is not required. Hold-Open mechanism shall be fully adjustable by slide mechanism. Point of hold open is set in field. Hold open shall release with a manual pressure on the edge of the door in the direction of close. Slide track shall have built-in cushioning shock-absorber mechanism. (Closer to be Norton Series 7900) (with Norton #790 Fire Bloc.) (Closer to be Norton Series 7900BF.)