Control Wiring; Special Control Wiring - Chamberlain MGJ Owner's Manual

DETERMINE WIRING TYPE
Refer to the wiring diagram located on the inside cover the electrical box to determine the type of control wiring.
MODEL MGJ
Standard C2 or B2 Wiring
Model MGJ operators are shipped from the factory with
jumper set for C2 wiring, which requires constant pres-
sure on button to close the door. If momentary contact
on close direction is desired (B2 wiring) you must include
an entrapment protection device.
jumper setting below.
Constant pressure on close (C2 wiring)
Red jumper wire was placed on terminal #2 in the elec-
trical enclosure. The operator will require constant pres-
sure 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 pro-
vided. 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.
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
TRAPPED BENEATH THE DOOR.

CONTROL WIRING

See close control
WARNING
CAUTION
OR DEATH TO PERSONS

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 dia-
gram(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.
MOUNT WARNING NOTICE
WARNING
IMPORTANT: Mount WARNING NOTICE beside or
below the push button station.
Push
CL OS E CL OS E
Buttons
WARNING
9
Control Station
W A R N I N G
TO PREVENT ENTRAPMENT
DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
WARNING Notice