TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION, DISCONNECT ELECTRIC
POWER BEFORE MANUALLY MOVING LIMIT NUTS.
WARNING
CAUTION
WARNING
WARNING
LIMIT SWITCH ADJUSTMENT
MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE
PROCEEDING WITH ADJUSTMENTS.
If other problems persist, call our toll-free number for
assistance - 1-800-528-2806.
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 actu-
ator. 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.
Retaining Plate
CLOSE
Limit Switch
SAFETY
(Aux. Close) Limit Switch
OPEN
Limit Switch
Actuator
PHOTO EYES & SENSING EDGES
Sensing devices supplied for door industry type oper-
ators with an isolated normally open (N.O.) dry con-
tact output are compatible with your operator. This
includes pneumatic and electric edges, and through
beam and retro reflective photo eyes. If your door
does not have bottom safety photo eyes or a sensing
edge and you wish to add a safety device to your
application, please contact your local LiftMaster
Authorized Dealer.
If not pre-installed by the door manufacturer, mount
the sensing edge on the door according to the instruc-
tions provided with the edge. The sensing edge may
be electrically connected by either coiled cord or take-
up reel.
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)
WIRING:
For wiring of your sensing device to the operator,
refer to the wiring diagrams supplied on pages 13
and 14. See field connection terminals identified as
Reversing Device.
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.
7
IT IS STRONGLY RECOMMENDED THAT A
SAFETY PHOTO EYE OR SENSING EDGE BE
USED IN CONJUNCTION WITH THE OPERATOR.
NOTICE
