Assa Abloy Norton Unitrol UNI J8300 Installation Instructions page 4

Closing Power See Figure 6
Adjust as required.

Hold-Open controls are at arm elbow (models suffixed

"H"). To select hold-open on or hold-open off and to adjust
the hold open force ... Use screwdriver as illustrated (See
Figure 10).
Closing Cycle (hydraulic control) See Figure 7A.
Valve "L" controls door speed in Latch range.
Valve "S" controls door speed in Sweep range.
Valve "D"–Optional–controls door speed in the Delay range.
Use 1/8" hex-key furnished and adjust as shown in Figure 8.
Door closing time should be between 3 and 7 seconds from
90º. Longer closing time may be required for the elderly or
handicapped.
Opening Cycle (hydraulic control) See Figure 7B.
Valve "B" cushions (slows) door opening in the backcheck
range.
Note: Never close this valve completely or damage to closer
may occur.
Use 1/8" hex-key furnished and adjust as shown in Figure 9.
Installation of Cover:
• Full cover: Slide cover insert into the un-used cutout in
cover. Install cover using screws provided.
Narrow cover: Install cover using screws provided. Screw

pinion cap onto shaft by hand or with a phillips screwdriver
- DO NOT OVERTIGHTEN.
Full metal cover: Fasten cover to mounting clips with

screws provided.
Architectural plastic cover: Slide cover insert into the un-

used cutout in cover. Install standoffs in ends of closer.
Snap cover onto standoffs.
Architectural metal cover: Remove cover insert where

pinion is located. Install standoffs in ends of closer. Install
cover using screws provided.
Door Holder Option
Door Holder Option
Hold-Open
"On"
Turn 90°
To "Off"
Hold-Open option is found at the arm elbow. To select
hold-open "on" or hold-open "off" and to adjust the hold-
open force ... use screwdriver as illustrated.
Copyright © 2005, 2008, 2024, ASSA ABLOY Accessories and Door Controls Group, Inc. All rights
reserved. Reproduction in whole or in part without the express written permission of ASSA ABLOY
Accessories and Door Controls Group, Inc. is prohibited.
80-9380-2214-020 Rev 3 (05-24)
Adjustment Instructions
Figure 10
Hold-Open Force
Press & Turn
To Decrease To Increase
Force Force
Approved 2024-05-14
Closing Power Control
For UNI J8301 and UNI J8501 series
Increase
only, see Power Adjust chart on Page 1.
Power
Adjustment Shaft
Use 5/16" Socket
Decrease
or Adjustable Wrench
Hydraulic Control
Fig. 7A
Closed
Closing Cycle
Closing Speed
Slow
Latch
Valve
1/8"
Hex
Key
L
Fast
Optional Delay Valve
Slow
1/8"
Hex
Key
Fast
Backcheck
Increase
Backcheck Valve*
1/8"
Hex
Key
Decrease
3000 Highway 74 East • Monroe, NC 28112
Tel: (877)-
www.nor tondoorcontrols.com
Figure 6
Fig. 7B
Backcheck
Range
Opening Cycle
Figure 8
Slow
Sweep
Valve
1/8"
Hex
Key
S
Fast
Figure 9
*NEVER close this valve
completely.
ASSA ABLOY
974-2255 • Fax: (800)-338-0965