Copyright © 1991, 2014 Yale Security Inc., an ASSA ABLOY Group company. All rights reserved.
Reproduction in whole or in part without the express written permission of Yale Security Inc. is prohibited.
80-9377-0510-020 (05-14)
ASSA ABLOY
4
Opening Cycle
Bac
kch
eck
g
n
i
n
e
p
O
1/8"
Hex
Key
Increase
Decrease
"P" (Normally Closed)
Open for backcheck
later in door-opening
cycle.
"B"
(NEVER Close
Completely)
Opening Cycle
Figure 4
Closing Power Control
Figure 1
Adjustment Instructions
Arm Attachment to Track
Insert arm stud into slide block in track. Secure by pushing in
on the retainer clip that extends from the slide block, until it is
flush with the slide block.
Door Opening Angle and/or Hold Open Angle:
Remove 9/64" hex drive socket head screw from arm. Open
door to desired angle and install hex-drive socket head screw
into hole in adjusting rod that is aligned with the hole in the
adjusting tube.
Closing Power
7700ST Models come in three different sizes (4 thru 6), each
power size can be increase by 50%.
7500ST Models are fully adjustable for proper sizing. See chart
on page 2 or 3.
To adjust closer power - See Figure 1.
Closing Cycle
(hydraulic control)
Standard Closer Only
See Figure 2a.
Valve "L" controls door speed in Latch range.
Valve "S/D" controls door speed in Sweep range.
Adjust as shown in Figure 3.
Delayed Action Closer Only
See Figure 2b.
Valve "L" controls door speed in Latch range.
Valve "S" controls door speed in Sweep range.
Valve "S/D" controls door speed in Delay range.
Adjust as shown in Figure 3.
Opening Cycle
(hydraulic control)
See Figure 4.
Valve "B" cushions (slows) door opening in the backcheck
range.
Valve "P" allows "backcheck" to begin later in the opening
cycle.
Adjust as shown in Figure 4.
On/Off Hold Open Feature:
Slotted screw, accessible thru hole in face of track, engages or
disengages the hold open feature with 1/4 turn of the screw.
Hold open units are not permitted in fire door assemblies.
Hold Open Power Adjustment:
If more hold open power is required, the power may be
increased by turning the adjustment screw in the end of the
track nearest the hinges. Use 9/64" hex wrench provided and
rotate adjustment screw clockwise to increase holding power.
Installation of Cover
:
Fasten cover to closer with two screws provided:
• Cover fastens at the top of closer
Closing Cycle
Figure 2
2B
2A
Standard
Closing Cycle
Delayed Action
Closing Cycle
Closed
Closed
10°
70°
10°
hct
aL
hct
aL
R
a
ep
e
n
w
ge
S
D
e
l
a
y
Ra
nge
p
e
e
w
S
Closing Speed Controls
Figure 3
1/8"
Hex
Key
1/8"
Hex
Key
Slow
Increase
Fast
Decrease
"L" (Latch)
"L" (Latch)
"S" (Sweep)
"S" (Sweep)
"D" (Delayed
Action)
Standard Closer
Delayed Action Closer
Sweep & Latch
Delay
3000 Highway 74 East • Monroe, NC 28112
Tel: (877)-
• Fax: (800)-338-0965
974-2255
www.nor tondoorcontrols.com
ASSA ABLOY
Install closer per instructions with the
proper pre-load applied to the arm then
adjust spring power. The power
adjustment will not work properly if the
closer spring is not pre-loaded. To
increase power, use 11/16" wrench to
turn power adjustment nut clockwise.
To decrease power, turn nut counter
clockwise.
DO NOT use a power
drill or driver to turn
adjustment nut. This
will damage closer and
void warranty.
"Spring Power
Adjustment
Nut"
+
-
Power Adjustment Chart
Maximum
Interior
Door Size
Maximum
Exterior
Door Size
30 / (.76)
36 / (.91)
42 / (1.07)
NOTE: Maximum of 16-1/2 turns
(360°) of Power Adjustment Nut.
48 / (1.22)
inches / (meters)
inches / (meters)
5
0
2
8
30 / (.76)
36 / (.91)
42 / (1.07)
48 / (1.22)
8
2
5
11
