Special Control Wiring - Chamberlain MH 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 settings to the right.
Constant pressure on close (C2 wiring)
In the electrical enclosure, a RED wire was placed on
terminal block #12. With this setting, the operator will
require constant pressure on close control in order to
keep door moving in the close direction.

SPECIAL CONTROL WIRING

If your operator was shipped from the factory with
non-standard control
accessories 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.
CONTROL WIRING
wiring or with optional
MOUNT WARNING NOTICE
IMPORTANT: Mount WARNING NOTICE beside or
below the push button station.
Push
C C O L L
O S SE E
Buttons
To prevent possible SERIOUS INJURY or DEATH, install
reversing sensors when the 3-button control station is out of
sight of the door or ANY other control (automatic or manual) is
used. Reversing devices are recommended for ALL
installations.
Momentary contact on close (B2 wiring)
Move RED wire from terminal block #12 to terminal #2.
The operator will require only momentary contact to
close the door.
SPECIAL CONTROL
WIRING DATA
This Operator has
Control Wiring.
SUPPLEMENTAL WIRING DIAGRAM(S)
REPLACEMENT WIRING DIAGRAM
Note: Supplemental Wiring Diagrams are
to be used in addition to 1753 or 1754.
Replacement Wiring Diagram is to be used
in place of 1753 or 1754.
Wiring Diagram label on inside cover
of electrical box
Control Station
W A R N I N G
TO PREVENT ENTRAPMENT
DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
WARNING Notice
8
WARNING
CAUTION
WIRING
Wiring
Type