lift-master hmj ユーザーズマニュアル

Retaining Plate

CLOSE Limit Switch

SAFETY
(Aux. Close) Limit Switch

OPEN Limit Switch

Aux. OPEN
Limit Switch

6

NOTE: 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

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.

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.

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.

WIRING:
For wiring of your sensing device to the operator, refer
to the wiring diagram supplied with your operator.
See field connection terminals identified as Sensing
Device or Safety Edge.

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.

To reduce the risk of SEVERE INJURY or DEATH, ALWAYS
install reversing sensors when the 3-button control station is
out of sight of door or ANY other control (automatic or manual)
is used. Reversing devices are recommended for ALL
installations.

To avoid SERIOUS PERSONAL INJURY or DEATH from 
electrocution, disconnect electric power BEFORE manually
moving limit nuts.