Entrapment protection accessories, Warning caution warning warning, Mgj limit switch adjustment – LiftMaster LGJ Light-Duty Gear-Reduced Jackshaft Operator for Rolling Grilles and Shutters User Manual

Page 8: Entrapment protection accessories (optional), Lgj electrical box - illustrated parts

TO AVOID SERIOUS PERSONAL INJURY OR DEATH

FROM ELECTROCUTION, DISCONNECT ELECTRIC

POWER BEFORE MANUALLY MOVING LIMIT NUTS.

WARNING

CAUTION

WARNING

MGJ LIMIT SWITCH ADJUSTMENT

MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE
PROCEEDING WITH ADJUSTMENTS.

SENSING EDGES
All types of sensing edges with an isolated normally
open (N.O.) output are compatible with your operator.
This includes pneumatic and electric edges. If your
door does not have a bottom sensing edge and you
wish to purchase one, contact the supplier of your
operator.

If not pre-installed by the door manufacturer, mount the
sensing edge on the door according to the instructions
provided with the edge. The sensing edge may be
electrically connected by either coiled cord or take-up
reel. Refer to the steps below

Important Notes:
a) Proceed with Limit Switch Adjustments before

making any sensing edge wiring connections to
operator as described below.

b) Electrician must hardwire the junction box to the

operator electrical box in accordance with local
codes.

ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)

IT IS STRONGLY RECOMMENDED THAT A
SENSING EDGE OR OTHER ENTRAPMENT
PROTECTION DEVICE BE USED IN
CONJUNCTION WITH THIS OPERATOR.

TAKE-UP REEL: Take-up reel should be installed 12"
above the top of the door.

COIL CORD: Connect operator end of coil cord to
junction box (not supplied) fastened to the wall
approximately halfway up the door opening.

If other problems persist, call our toll-free number for
assistance - 1-800-528-2806.

Retaining Plate

CLOSE Limit Switch

SAFETY
(Aux. Close) Limit Switch

OPEN Limit Switch

1. To adjust limit nuts depress retaining plate to allow

nut to spin freely. After adjustment, release plate
and ensure it seats fully in slots of both nuts.

2. To increase door travel, spin nut away from

actuator. To decrease door travel, spin limit nut
toward actuator.

3. Adjust open limit nut so that door will stop in open

position with the bottom of the door even with top
of door opening.

4. Repeat Steps 1 and 2 for close cycle. Adjust close

limit nut so that actuator is engaged as door fully
seats at the floor.

Actuator

Aux. OPEN Limit Switch

LGJ ELECTRICAL BOX - ILLUSTRATED PARTS

L10