LiftMaster LGJ Light-Duty Gear-Reduced Jackshaft Operator for Rolling Grilles and Shutters - Manual (Page 11)

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SINGLE PHASE SCHEMATIC DIAGRAM for LGJ 1666 CONTROL WIRING
Standard C2 or B2 Wiring
Model MGJ operators are shipped from the factory
with jumper set for C2 wiring, which requires constant
pressure on button to close the door. If momentary
contact in close direction is desired (B2 wiring) you
must include an entrapment protection device. See
close control jumper setting below.
Constant pressure on close (C2 wiring)
Red jumper wire was placed on terminal #2 in
the electrical enclosure. The operator will require
constant pressure on close control in order to keep
door moving in the close direction.
Momentary contact on close (B2 wiring)
Move red jumper wire from terminal #2 to terminal
#3. The operator will require only momentary
contact to close the door.
LOCATING THE CONTROL STATION
All operators are supplied with some type of control station. Generally a three button station
(OPEN/CLOSE/STOP) is provided. A two-position key switch or control station (OPEN/CLOSE) may be added or
substituted when requested at the time of order. Mount the control station near the door.
WARNING
CAUTION
WARNING
WARNING
INSTALL THE CONTROL STATION WHERE THE
DOOR IS VISIBLE, BUT AWAY FROM THE DOOR AND
ITS HARDWARE. IF CONTROL STATION CANNOT BE
INSTALLED WHERE DOOR IS VISIBLE, OR IF ANY
DEVICE OTHER THAN THE CONTROL STATION IS
USED TO ACTIVATE THE DOOR, A REVERSING
EDGE MUST BE INSTALLED ON THE BOTTOM OF
THE DOOR. FAILURE TO INSTALL A REVERSING
EDGE UNDER THESE CIRCUMSTANCES MAY
RESULT IN SERIOUS INJURY OR DEATH TO
PERSONS TRAPPED BENEATH THE DOOR.
W A R N I N G
TO PREVENT ENTRAPMENT
DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
OPEN
CLOSE
STOP
Control Station
WARNING Notice
Push
Buttons
IMPORTANT: Mount WARNING NOTICE beside or
below the push button station.
MOUNT WARNING NOTICE
DETERMINE WIRING TYPE
Refer to the wiring diagram located on the inside cover the electrical box to determine the type of control wiring.
SPECIAL CONTROL WIRING
If your operator was shipped from the factory with
non-standard control wiring or with optional
accessories that require additional instructions, refer
to the wiring diagram(s) indicated in the special
control wiring data box. When a replacement wiring
diagram is present, wiring diagrams in this manual
will not apply. Refer only to the replacement wiring
diagram for all connections.
IMPORTANT NOTE: If your wiring diagram is
missing, or you are unsure of the wiring type for
your operator, contact the customer service
department @ 1-800-528-2806.
MODEL MGJ
Standard G2 Wiring
Model LGJ operators are supplied with type G2 control
wiring. Study the control features list below to
determine the features and type of control equipment
that may be used with your operator.
Entry Controls:
OPEN control requiring maintained contact.
OPEN control requiring only momentary contact.
CLOSE control requiring maintained contact.
CLOSE control requiring only momentary contact.
OPEN/CLOSE single control requiring momentary
contact..
STOP control requiring momentary contact.
Safety Devices:
External Interlock switch to disable all control
pneumatic safety (N.C.) to STOP while closing Safety
Device to REVERSE while closing Door Lock Sensing
Circuit.
Operational Features:
REVERSE (if closing) with momentary contact on
OPEN.
AUTOMATIC TIMER to CLOSE from any device.
AUTOMATIC TIMER to CLOSE from selected devices.
DELAY REVERSE in either direction for 1 second.
STOP after maximum run time is exceeded.
Note:
Refer to LGJ control connection diagrams on page 15.
MODEL LGJ