 A member of the Yale Security Group
SERIES 7970/7970 DPS
STANDARD FEATURES
Concealed Transom Mounting: closer mounts in header of wood,
aluminum or hollow metal frames: minimum 4" (102mm) header required. (A 2" x
4" dust/grout box and a removable stop, provided by the door and frame supplier, is
required.) Wood frame installation will generally require special offset templating.
Concealed Top Rail Mounted Slide Track: requires a minimum
2" (51mm) top rail depth and a 1-3/4" (44mm) minimum door thickness.
Concealed Arm: when door is closed: requires a 3/8" deep
door cutout for arm clearance.
Accommodates Most Door Hanging Methods: closer can be
installed on doors hung on either butt hinges, offset or center pivots. Offset and center
pivots supplied by others.
Shock Absorbing Door Stop: non-hold-open closers have an
adjustable position stop block. However, use of an auxiliary door stop is always
recommended.
Dress Plates: supplied with all 7970 Series closers are
secured to bottom of closer with TORX screws. Prevents tampering and offers streamlined
appearance.
Security Fasteners: (TORX screws with security pin) furnished
standard on all 7970 Series closers
Aluminum Alloy Shell: lightweight with proven durability.
Rack & Pinion Operation: assures smooth power
transmission thru entire opening and closing cycles.
50% Spring Power Adjustment: power is adjustable up to 50%
over minimum closing force for each closer size; spring adjustment gear assembly adjusted
by a standard screwdriver.
Adjustable Closing Speed: independent regulating valve:
hex-key operated.
Adjustable Latch Speed: independent regulating valve, hex-key
operated.
Non-Critical Valves: all control valves are non-critical;
operated by a 1/8" hex-key.
Non-Hold-Open Arm: 13" (330mm) long with offset bend to
permit 180° door opening: handed.
Separate Hinges/Pivots: hinges or pivots supplied by others
therefore not packaged with door closers; no early jobsite opening of closer package until
closer is installed, no lost hardware.
Optional Features
790 Fire Block Door Liner: for use in 20 minute fire door
assemblies where recognized by local authorities having jurisdiction.
 Adjustable Delayed
Action Closing: delays closing at any point beyond 70° of door opening; for
handicapped or wheeled traffic.
 Accessibility Code
Closer: available as 7970BFI Series for interior doors, 7970BFE Series for exterior
doors, with low opening resistance to conform to the requirements of ANSI A117.1
Specifications. These closers provide reduced opening forces to conform with barrier code
requirements for the handicapped and still provide acceptable door control. Consult the
Norton Marketing Department for application details of this closer.
Security Option 7970 DPS
Door Position Switch (DPS): this switch is Single Pole Double
Throw (SPDT) momentary contact, with one (1) normally open and one (1) normally closed set
of contacts. The three switch terminals are wired to the integral conduit box for
connection to incoming wiring. The switch and wiring are for operation with 6 to 24
VAC/VDC systems.
Door Position Switch Adjustment: Can be made at the opening
without removing the closer from the frame. The door position adjustment test socket is
accessible, during installation for easy adjustment of the switch cam. Test probes from a
volt meter are inserted into the test socket while using a 1/8" hex wrench to adjust
the "Position Switch Adjustment".
Test Socket: Volt meter or test light may be connected to
test socket to test normally open circuit or normally closed circuit at the door opening.
The door position switch may be adjusted at the same time without removal of closer from
door.
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