Installation; Programming Remote To Receiver; To Erase All Remote Control Codes; Specifications - Chamberlain LiftMaster Professional 312HM Owner's Manual

INSTALLATION

The receiver and antenna use TV Type F coaxial connectors.
The antenna can be plugged directly onto 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.
Without Transformer
Make a jumper wire connection to receiver terminals 1 and 3.
Connect wires from receiver to opener as illustrated in Figure 4.
Transformer Model 85
Receiver terminals 1 and 2 are not used. Connect bell wire to
receiver terminals 3 and 4 and to opener terminals used for push
button controls. Figure 5. The transformer plugs into a 120V
outlet.
Transformer Model 95 (Without Plug-in Jack)
Connect transformer secondary wires the receiver terminal 1
and 2. Connect bell wire to receiver terminals 3 and 4 and to
opener terminals used for push button controls. Figure 6. The
transformer plugs into a 120V outlet.
Programming the Remote to the Receiver
1. Pry open the front panel of receiver case with a coin or a
screwdriver. Re-connect power to opener. Figure 7.
2. Press and release the "learn" button on the receiver. The learn
indicator light will glow steadily for 30 seconds.
3. Within 30 seconds, press and hold the button on the hand-held
remote that you wish to operate your garage door.
The opener will now operate when the push button on either the
receiver or the remote control transmitter is pressed.
Repeat Steps 2 and 3 for each remote control that will be used to
operate the garage door opener.

To Erase All Remote Control Codes

Press and hold the "learn" button on the receiver panel until the
indicator light turns off (about 6 seconds). All transmitter codes
are now erased. Then follow the steps above to reprogram each
remote control.

SPECIFICATIONS

Output Rating ......................................5 Amps 28VAC or DC Max.
Power.....................................................18V - 30V ~, 30mA, 60Hz
RF Frequency....................................................................315MHz
If the power is other than shown in specifications, Accessory
Transformer Model 85 or 95 is required.
Accessory Transmitters — Series 300.
SERVICE INFORMATION TOLL FREE NUMBER
1-800-528-2806
114A3097B
OPENING RECEIVER
18 - 30V , 30mA
© 2006, The Chamberlain Group, Inc.
All Rights Reserved
RECEIVER
(Bottom)
CONNECT
1
JUMPER
WIRE TO
2
TERMINALS
3
1 AND 3
4
FIGURE 4
RECEIVER
RECEIVER
(Bottom)
(Top)
1
2
Connect
3
Antenna
4
Connect
Transformer
FIGURE 5
RECEIVER WALL
(Bottom) BUTTON
1
2
3
4
To wall Model 95
outlet
Transformer
FIGURE 6
OPEN RECEIVER
Connect
Antenna
24V
FIGURE 7
WALL
BUTTON
OPENER
1
Common
2
Relay
3
24 v
WALL
BUTTON
OPENER
1
Common
TRANS
PRIMARY
2
Relay
3
24 v
Model 85
Transformer
To wall outlet
OPENER
1
Common TRANS
PRIMARY
2
Relay
3
24 v
Indicator Light
Learn Button
C
P2
M
12V
TRANS
PRIMARY
Output Duration
Terminals
Security Mode
Power Supply
Jumper