A7408B
8
General Information
The 80 Prefix switch allows the initial hold open point to be adjustable from 20 degrees through full door opening.
This adjustment is done using a cam on the spindle opposite from where the arm mounts.
(Not available with 9- units.)
Adjustment Instructions
A. IMPORTANT
1. CAUTION: DISCONNECT ALL INPUT POWER BEFORE BEGINNING INSTALLATION TO PREVENT ELECTRICAL SHOCK AND
EQUIPMENT DAMAGE.
2. INSTALLER MUST BE A TRAINED, EXPERIENCED SERVICE PERSON.
3. ALL WIRING MUST COMPLY WITH APPLICABLE LOCAL ELECTRICAL CODES, ORDINANCES AND REGULATIONS.
B. Installation
1. Mount closer/holder per instruction sheet provided.
2. Locate switch and cam and loosen both set screws in cam.
3. Open door to desired holding position and hold open with door stop. Rotate cam until switch roller is on lower section of cam and
approximately 1/32" from bottom of incline. Cam should be positioned so when door closes, roller on switch will ride up incline
of cam operating the switch. Tighten one set screw in cam with hex key and pull door closed.
4. Pull door open to desired hold open position. When switch roller travels down to bottom of incline, door closer will function as a
standard multi-point holder. Depending on door size and closer fall back, cam may need to be adjusted so that the switch roller is
positioned properly for desired door operation. Tighten both set screws firmly.
Cam
Set screw
Set screw
Approx. 1/32"
Switch
roller
Rotation of cam
when closing door
Rotation of cam
when opening door
Cam in Door Closed Position
Cam in Door Open Position
Top View of Closer/Holder
Set screw 2 places
Cam
Switch roller
SARGENT Optional 80- Prefix Bypass Hold Open Switch
for 2960, 2970 and 2990 Fire Guard
