Chamberlain Garage Door Opener 323LM User Manual

3-Channel Receiver  
Model 323LM  
OWNERS MANUAL  
The receiver can be used with a multi-function remote  
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.  
WARNING  
To prevent possible SERIOUS INJURY or DEATH from electrocution:  
• Be sure power is not connected BEFORE installing the receiver.  
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.  
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.  
• ALWAYS keep gate or garage door in sight until completely closed.  
NEVER permit anyone to cross path of moving gate or door.  
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.  
WARNING  
To prevent possible SERIOUS INJURY or DEATH, the use of  
CONSTANT OPERATION on residential openers is PROHIBITED.  
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.  
WARNING  
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.  
• Use a screwdriver to pry open the receiver cover.  
NOTE: The slide switch is factory set to the N.C. position (other-  
wise the opener will not operate). Verify this setting. Re-connect  
power to the opener and the accessory transformer, if used.  
Figure 1  
Example of Operator  
Terminal Strip  
COAXIAL  
RECEIVER  
Connect  
Antenna  
Figure 2  
24Vac  
CONTROL  
STATION  
1
2
OPENING RECEIVER  
C(Blue)  
OPEN  
B(Yellow)  
STOP  
3
Wire nut  
Close  
Open  
Stop  
A(Grey)  
4
CLOSE  
STOP  
COMMON  
CLOSE  
Slide Switch – N.C. Position  
OPEN  
• 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.  
1
 

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