Chamberlain LiftMaster 423LM Owner's Manual

The receiver can be used with a multi-function remote
WARNING
control to operate three residential garage door openers, or
with a three-button door control to OPEN, CLOSE or STOP a
commercial garage door opener. Not for use on residential
fail-safe operators.
CAUTION
INSTALLATION
The receiver and antenna use TV Type F coaxial connectors. The
antenna can be plugged directly into the receiver or mounted to a
bracket and connected to the receiver with Model 86 Coaxial
Cable Kit, depending on your requirements.
Select a location for the receiver which allows access to the
terminals and space for the antenna (as far from metal structures
as possible and preferably with the antenna in an upright
position). Fasten the receiver securely with screws through the
two holes provided in the cover flanges.
To use the receiver with a 3-button door
control and a commercial door opener:
Consult your manufacturer's control connection diagram for
instructions on connecting two or more 3-button control devices.
Figure 1.
• Use a screwdriver to pry open the receiver cover.
NOTE: The slide switch is factory set to the N.C. position
(otherwise the opener will not operate). Verify this setting.
Re-connect power to the opener and the accessory transformer, if
used.
Figure 1
COAXIAL
RECEIVER
1
C(Blue)
2
B(Yellow)
3
A(Grey)
4
• Select a remote control push button to STOP the opener. (It is recommended that you use the large button on remote).
• Press and hold the selected remote push button.
• Then press and release the "learn" button labeled "A" on the receiver. The adjacent indicator light will FLASH.
• Release the remote push button.
Repeat the procedure above with a second remote push button and receiver "learn" button "B" to program the OPEN operation;
and again with the last remote push button and receiver "learn" button "C" to program the CLOSE function of the opener.
Return the front cover to the receiver.
NOTE: If a remote control push button is not pressed within 30 seconds, the indicator light adjacent to the selected "learn" button will
turn OFF. In that case, repeat the programming.
Example of Operator
Terminal Strip
24Vac
STOP
Wire nut
COMMON
CLOSE
OPEN
3-Channel Receiver
WARNING
To prevent possible SERIOUS INJURY or DEATH from electrocution:
• Be sure power is not connected BEFORE installing the receiver.
WARNING
To prevent possible SERIOUS INJURY or DEATH from a moving gate
or garage door:
• ALWAYS keep remote controls out of reach of children. NEVER
permit children to operate, or play with remote control transmitters.
• Activate gate or door ONLY when it can be seen clearly, is properly
adjusted, and there are no obstructions to door travel.
• ALWAYS keep gate or garage door in sight until completely closed.
NEVER permit anyone to cross path of moving gate or door.
To prevent possible SERIOUS INJURY or DEATH, the use of
CONSTANT OPERATION on residential openers is PROHIBITED.
When a receiver is used to activate a commercial door opener, 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.
Figure 2
CONTROL
STATION
OPENING RECEIVER
OPEN
CLOSE
STOP
1
Model 423LM
OWNERS MANUAL
WARNING
CAUTION
WARNING
CAUTION
Slide Switch – N.C. Position
Connect
Antenna
Close
Open
Stop