Chamberlain Clock 355 2LM User Manual

Universal Radio Control  
OWNER’S MANUAL  
Model 355LM Security® Receiver Only  
Model 355-2LM Security®  
(With 2 Remote Controls)  
NOTICE TO U.S. CONSUMERS:  
WARNING  
Some states prohibit the service or repair of garage door openers which  
cannot be made to comply with the safety standards contained in UL 325  
(1988 revision). In order to comply with both the letter and the spirit of  
these laws, this universal radio control should not be used with any  
LiftMaster®, Chamberlain®, or Sears Craftsman® garage door opener  
manufactured prior to April 1, 1982. To find out if your  
Chamberlain-made garage door opener was manufactured prior to or  
after April 1, 1982, please call 1-800-528-9131 before installing this  
universal radio control.  
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 controls.  
• 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.  
Figure 1  
MOUNTING RECEIVER  
• Unplug the opener before proceeding.  
Push Button  
Common  
Radio Power  
Opener  
Terminals  
• Fully extend antenna wire below bottom of case as shown.  
• The receiver can be mounted directly on the door opener with  
the clips provided (Figure 1).  
OR  
®
• Attached to a ceiling/inside wall of the garage with connecting  
bell wire (not provided). Fasten the receiver to the ceiling or  
inside garage wall with dry wall screws provided (Figure 2).  
NOTE: Transformer Model 85 or 95 is required if your residential  
garage door opener is a LiftMaster, Chamberlain or Sears.  
Antenna Wire Fully Extended  
INSTALLATION USING CLIPS  
Loosen the three terminal screws on the receiver (labeled 1, 2  
and 3) (Figure 1). Insert one end of a mounting clip under each  
terminal. Do not retighten at this time.  
Figure 2  
Loosen the three terminal screws on the opener used for push  
button controls and radio power.  
Push Button  
Radio Power  
Opener  
Terminals  
Common  
Leaving the push button bell wire in place, insert the other ends  
of the mounting clips under the opener terminal screws.  
3
2
1
®
NOTE: If the number sequence of opener terminals does not  
match the receiver, turn the receiver around (so back is facing  
out) and complete the connection.  
Retighten the terminal screws on opener and receiver.  
Reconnect power to the opener. The receiver push bar should  
light. If it does not, use Transformer Model 85 or 95.  
Antenna Wire  
Fully Extended  
Figure 3  
INSTALLATION USING BELL WIRE  
Attach one end of 3-strand bell wire (not provided) to receiver  
terminals 1, 2 and 3. Connect the other end to the three opener  
terminals used for push button controls and radio power. Use  
insulated staples to secure bell wire between receiver and opener  
(Figure 2).  
Opener Terminals  
Reconnect power to the opener. The receiver push bar should  
light. If it does not, use Transformer Model 85 or 95.  
3
2
1
3
2
1
Transformer  
®
INSTALLATION WITH TRANSFORMER  
With the transformer, use a 2-wire connection only. Attach wire to  
receiver terminals 1 and 2 and to the opener terminals used for  
push button control. Plug the transformer into receiver and 120  
Volt outlet (Figure 3).  
NOTE: Transformer Model 85 or 95 is required if your residential  
garage door opener is a LiftMaster, Chamberlain or Sears.  
 

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