2
A7321D
Copyright ©
2009,
2019 SARGENT Manufacturing Company, an ASSA ABLOY Group
company. All rights reserved. Reproduction in whole or in part without the express
written permission of SARGENT Manufacturing Company is prohibited.
1-800-438-1951 • www.sargentlock.com
Use provided hex wrench to turn valves.
NEVER force valves out of closer.
NEVER completely close backcheck valve.
NEVER use backcheck as a door stop.
Door must be open (only a few inches) to
adjust spring closing power. Use 3/16" hex
wrench to turn screw.
Do not use a power
drill. Warranty will be void.
Closer Adjustments
278 Concealed Closer
If interior doors do not have to comply with
ADA requirements, exterior door settings
are recommended. Where strong drafts
exist, increase spring power as needed by
turning spring adjustment screw clockwise.
If necessary, reduce spring power by turning
screw counter clockwise.
*Mounting Hardware
Door or Frame
Drill
Case and Foot:
#12 x 1-1/2 Phillips Flat Head Self Drilling Tap-
ping Screw
Wood
3/32" (2.38mm)
Case and Foot:
#12 x 1-1/2 Phillips Flat Head Wood Screw
Case and Foot:
#12-24 x 3/4 Phillips Flat Head Machine Screw
Metal
Drill #16
(.177)
Tap 12-24
Foot:
Mortise Nut
(optional)
Hollow Metal
1/4" (6.00mm) thru
3/8" (9.50mm) door face opposite to closer
Aluminum or Wood 3/8" (9.50mm) thru
* Security Torx screws supplied upon request, not shown
** #8-32 x 1/4 Phillips Flat Head Machine screw used for Closer Faceplate or Removable Stop, not shown
Mortise Nut and Screw Detail
Appropriate mortise nuts and screws will be supplied based on door
thickness.
Door construction must provide a bridge type reinforcement to prevent
the door rail from collapsing when screws are tightened.
If distance between door stop and center of mortise nut head is less than
7/8" (22mm), stop must be cut to clear head or head must be recessed.
Number of Spring Power Nut Turns From
Factory Setting (Use as Guide ONLY)
Door Width
Exterior
Interior
24"
Factory Set
1-5 CCW
30"
1-5 CW
32"
36"
5-8 CW
40"
42"
8-13 CW
Factory Set
44"
46"
13-15 CW
1-5 CW
48"
over 48"
up to 18 CW
5 CW & up
Spring
Adjustment
Latching
Speed
Backcheck
Closing
Speed
Approved 2020-01-21
