Control Wiring; Special Control Wiring - Chamberlain GH 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.
Standard C2 or B2 Wiring
Standard 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 on 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
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.

SPECIAL CONTROL WIRING

If your operator was shipped from the factory with
non-standard control wiring or with optional acces-
sories that require addition 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.
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
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.

CONTROL WIRING

SPECIAL CONTROL
This Operator has
Control Wiring.
SUPPLEMENTAL WIRING DIAGRAM(S)
REPLACEMENT WIRING DIAGRAM
Note: Supplemental Wiring Diagrams are
to be used in addition to 1742-1.
Replacement Wiring Diagram is to be used
in place of 1742-1.
IMPORTANT NOTE: If your wiring diagram is missing,
or you are unsure of the wiring type for your operator, con-
tact the customer service department @ 1-800-528-2806.
IMPORTANT: Mount WARNING NOTICE beside or
below the push button station.
Push
Buttons
8
WIRING DATA
Wiring Diagram label on inside cover
of electrical box
MOUNT WARNING NOTICE
Standard
Control Station
W A R N I N G W A R N I N G
CL OS E
TO PREVENT ENTRAPMENT
DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
WARNING Notice
WIRING DIAG
Wiring
Type