Linear Garage Door Opener MDR U User Manual

IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS  
CAUTION  
RISK OF ELECTRICAL SHOCK  
DO NOT OPEN  
MDR-U  
1. Read these instructions.  
2. Keep these instructions.  
WARNING  
3. Heed all warnings.  
4. Follow all instructions  
TO REDUCE THE RISK OF SEVERE  
Universal  
MegaCode™  
Receiver  
5. Do not use this apparatus near water.  
6. Clean only with dry cloth.  
INJURY OR DEATH  
7. Do not install near any heat sources such as radiators, heat registers, stoves, or other  
EXPLANATION OF GRAPHIC WARNING SYMBOLS  
1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS  
2. NEVER LET CHILDREN OPERATE, OR PLAY WITH DOOR CONTROLS! KEEP REMOTE CONTROL AWAY FROM CHILDREN!  
apparatus (including amplifiers) that produce heat.  
This symbol is intended to alert the user to the presence of  
un-insulated “dangerous voltage” within the product’s enclosure that  
may be of sufficient magnitude to constitute a risk of electric shock.  
8. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized  
3. ALWAYS KEEP MOVING DOOR IN SIGHT AND AWAY FROM PEOPLE AND OBJECTS UNTIL IT IS COMPLETELY CLOSED.  
plug has two blades with one wider than the other. A grounding type plug has two  
For Garage Door Operator  
Remote Control  
NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.  
4. NEVER GO UNDER A STOPPED, PARTIALLY OPEN DOOR.  
blades and a third grounding prong. The wide blade or the third prong are provided for  
WARNING!To reduce the risk of fire or electric shock, do not  
expose this device to rain, water, or wet locations.  
your safety. If the provided plug does not fit into your outlet, consult an electrician for  
replacement of the obsolete outlet.  
This symbol is intended to alert the user to the presence of  
important operating and maintenance (Servicing) instructions in the  
literature accompanying the device.  
CAUTION  
Installation Instructions  
9. Unplug this apparatus during lightning storms or when unused for long periods of time.  
TO REDUCE THE RISK OF ELECTRIC SHOCK, DISCONNECT POWER TO THE RECEPTACLE BEFORE INSTALLING OR  
REMOVING THE UNIT. WHEN REMOVING RECEPTACLE COVER SCREW, COVER MAY FALL ACROSS PLUG PINS OR  
10. Refer all servicing to qualified service personnel. Servicing is required when the  
apparatus has been damaged in any way, such as power-supply cord or plug is  
damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus  
RECEPTACLE MAY BECOME DISPLACED. USE ONLY WITH DUPLEX RECEPTACLE HAVING CENTER SCREW. SECURE UNIT  
IN PLACE BY RECEPTACLE COVER SCREW.  
(760) 438-7000 • FAX (760) 438-7043  
USA & Canada (800) 421-1587 & (800) 392-0123  
Toll Free FAX (800) 468-1340  
has been exposed to rain or moisture, does not operate normally, or has been dropped.  
PRODUCT DESCRIPTION  
COMPONENT LOCATIONS  
DETERMINE THE BEST RECEIVER LOCATION  
CHECK FOR INTERFERENCE FROM OTHER RECEIVERS  
The Model MDR-U Universal MegaCode™ Receiver is designed for use as a  
replacement radio control receiver in garage door operator installations. The  
receiver is self-contained, not requiring an external transformer or power from the  
garage door operator.The receiver plugs directly into a 120 VAC outlet. A retaining  
screw is provided to secure the receiver to the outlet.  
AC POWER  
TERMINALS  
BEST  
WATCH THE  
IF THE LEARN INDICATOR IS FLASHING  
MDR-U RECEIVER'S  
RETAINING  
SCREW  
LEARN & SIGNAL  
INDICATOR  
RECEPTION  
A PLUG ON THE CEILING WILL GIVE THE BEST RADIO  
RECEPTION (UNLESS THE OPERATOR'S RECEIVER  
CAUSES SOME INTERFERENCE)  
WITHOUT ACTIVATING ANY TRANSMITTERS,  
LEARN INDICATOR  
INTERFERENCE MAY BE COMING FROM  
A NEARBY OPERATOR'S RECEIVER  
Two screw terminals on the receiver are for connection to the garage operator’s  
pushbutton input. A dry contact, Form “A”, relay in the receiver will provide a  
.5-seconds closure across the terminals when the receiver activates. A flexible wire  
antenna extends from the receiver’s case to provide maximum radio reception.  
MegaCode™ receivers and transmitters do not contain a typical “coding switch”.  
Each transmitter is pre-set at the factory to a unique code. The receiver is  
programmed by sending a signal from the transmitter, storing the transmitter’s code  
into the receiver’s memory. The receiver will retain its memory, even without power.  
The receiver will activate only from these “memorized” transmitters. Each MDR-U  
receiver can be programmed to activate from up to ten MegaCode™ transmitters.  
The learn button and learn indicator are used for entering and erasing the  
transmitters in the receiver’s memory. The learn indicator also displays signals  
being received and can be used for troubleshooting.  
TEST IF THE OPERATOR IS THE SOURCE OF THE  
INTERFERENCE BY UN-PLUGGING THE OPERATOR FROM  
POWER  
GOOD  
RECEPTION  
IF THE LEARN INDICATOR STOPS FLASHING, THE OPERATOR  
IS THE SOURCE OF INTERFERENCE  
1. IF THE OPERATOR HAS AN EXTERNAL RADIO RECEIVER,  
DISCONNECT POWER TO IT  
A PLUG ABOVE  
THE GROUND LEVEL  
WILL PROVIDE  
GOOD RADIO  
RECEPTION  
A PLUG CLOSE  
TO GROUND LEVEL  
WILL CAUSE  
POOR RADIO  
RECEPTION  
2. IF THE OPERATOR HAS A BUILT-IN RADIO RECEIVER, CUT  
THE COMPONENT THAT FEEDS POWER TO THE RECEIVER  
OR CUT OFF THE OPERATOR'S ANTENNA AND REMOVE THE  
OPERATOR'S  
ANTENNA  
POOR  
RECEPTION  
ANTENNA  
RECEIVER'S TUNING SLUG  
RELAY OUTPUT  
LEARN  
BUTTON  
TERMINALS  
1 AMP @ 32 VDC  
MAXIMUM  
NOTE: IT IS RECOMMENDED TO DISABLE THE OPERATOR'S  
RECEIVER TO PREVENT THE OLD REMOTES FROM ACTIVATING IT  
CONNECT THE RECEIVER TO THE OPERATOR  
INSTALL THE RECEIVER  
PROGRAM AND TEST THE RECEIVER  
LINEAR LIMITED WARRANTY  
This Linear product is warranted against defects in material and workmanship for twelve (12) months. The Warranty  
Expiration Date is labeled on the product. This warranty extends only to wholesale customers who buy direct  
from Linear or through Linear’s normal distribution channels. Linear does not warrant this product to consumers.  
Consumers should inquire from their selling dealer as to the nature of the dealer’s warranty, if any. There are no  
obligations or liabilities on the part of Linear Corporation for consequential damages arising out of or in  
connection with use or performance of this product or other indirect damages with respect to loss of property,  
revenue, or profit, or cost of removal, installation, or reinstallation. All implied warranties, including implied  
warranties for merchantability and implied warranties for fitness, are valid only until Warranty Expiration Date as labeled  
on the product. This Linear Corporation Warranty is in lieu of all other warranties express or implied.  
All products returned for warranty service require a Return Product Authorization Number (RPA#). Contact Linear  
Technical Services at 1-800-421-1587 for an RPA# and other important details.  
ADDING TRANSMITTERS  
1. PRESS AND RELEASE THE  
LEARN BUTTON  
ERASING TRANSMITTERS  
1. PRESS AND HOLD DOWN THE LEARN BUTTON  
CONNECT 2-CONDUCTOR WIRE TO THE  
MDR-U RECEIVER RELAY OUTPUT TERMINALS  
DISCONNECT POWER TO THE GARAGE  
DOOR OPERATOR BEFORE PROCEEDING  
REMOVE THE OUTLET'S COVER  
PLATE SCREW AND PLUG THE  
RECEIVER INTO THE 110 VAC OUTLET  
2. THE LEARN INDICATOR WILL  
FLASH COUNTING THE NUMBER  
OF TRANSMITTERS IN MEMORY  
UL NOTE: ALL LOW VOLTAGE CLASS 2 CABLE  
USED WITH THE OPERATOR MUST BE UL LISTED  
TYPE CL2, CL2P, CL2R, OR CL2X OR OTHER CABLE  
WITH EQUIVALENT OR BETTER ELECTRICAL,  
MECHANICAL, AND FLAMMABILITY RATINGS  
2. THE LEARN INDICATOR WILL LIGHT  
IF THERE'S ROOM IN MEMORY  
(UP TO 10 TRANSMITTERS WILL FIT)  
3. CONTINUE HOLDING DOWN  
THE LEARN BUTTON  
NOTE: BE SURE THAT THE OUTLET  
IS NOT CONTROLLED BY A WALL SWITCH  
3. ACTIVATE THE TRANSMITTER  
WHILE THE INDICATOR IS LIT  
(WITHIN 15 SECONDS)  
4. 5 SECONDS AFTER THE COUNT  
THE INDICATOR WILL FLASH ONCE  
SHOWING THE MEMORY ERASURE  
WALL PUSHBUTTON  
CONNECTION  
IMPORTANT !!!  
ROUTE THE WIRE AND CONNECT IT  
TO EITHER THE WALL PUSHBUTTON OR  
4. INDICATOR FLASHES  
Linear radio controls provide a reliable communications link and fill an important need in portable wireless signaling.  
However, there are some limitations which must be observed.  
FROM  
DIRECTLY TO THE DOOR OPERATOR  
OPERATOR  
(POLARITY NOT IMPORTANT)  
5. REPEAT STEPS FOR ADDITIONAL  
TRANSMITTERS  
5. RELEASE THE BUTTON, THE UNIT  
ENTERS LEARN MODE FOR 15 SECONDS  
For U.S. installations only:The radios are required to comply with FCC Rules and Regulations as Part 15 devices. As  
such, they have limited transmitter power and therefore limited range.  
PUSHBUTTON  
MDR-U  
SECURE THE  
WIRE WITH  
INSULATED  
STAPLES  
DIRECT OPERATOR  
CONNECTION  
A receiver cannot respond to more than one transmitted signal at a time and may be blocked by radio signals that  
occur on or near their operating frequencies, regardless of code settings.  
Changes or modifications to the device may void FCC compliance.  
SECURE THE RECEIVER  
TO THE OUTLET WITH  
THE RETAINING SCREW  
Infrequently used radio links should be tested regularly to protect against undetected interference or fault.  
A general knowledge of radio and its vagaries should be gained prior to acting as a wholesale distributor or dealer,  
and these facts should be communicated to the ultimate users.  
TEST RECEIVER  
ACTIVATE EACH TRANSMITTER  
AND VERIFY THAT THE RECEIVER  
AND DOOR OPERATOR ACTIVATES  
This device complies with FCC Part 15 and Industry Canada Rules and Regulations. Operation is subject to the following two  
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received,  
including interference that may cause undesired operation.  
ANTENNA  
3
2
1
OPERATOR TERMINALS 1 & 2  
(OR THE SAME TERMINALS  
THE WALL PUSHBUTTON USES)  
Copyright © 2004 Linear Corporation  
220675 A  
 

Kyocera Car Satellite TV System KM 1820 User Manual
Lenovo Laptop X61S User Manual
Leviton Carrying Case LEAPS 120 User Manual
Magic Chef Food Processor MCFC1W User Manual
Marantz Home Theater System RC5000i User Manual
Maytag Range W10239461A User Manual
MB QUART Car Speaker PWE 302 User Manual
Melissa Blender 246 008 User Manual
Memorex MP3 Player MPD8819 User Manual
Microsoft Server volume 2 User Manual