User manual LIFT-MASTER 420LM

[. . . ] Lift-Master The Professional Line SPECIFICATIONS Output Rating. . . . . . . . 3 Amps 120VAC or DC Max. Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V to 35V, @ 30ma RF Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390MHz If the power is other than shown in specifications, Accessory Transformer Model 85 is required. [. . . ] Fasten the receiver securely with screws through tow holes provided in the cover flanges. FIGURE 1 -- WITHOUT TRANSFORMER: Connect bell wire (not supplied) to receiver terminals 1 and 2, and to opener radio power terminals. FIGURE -- WITH 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. The transformer plugs into 120V outlet. Side 2 contains code setting instructions, as well as instructions for changing output duration and voltage setting. SET RECEIVER TO MATCH REMOTE CONTROL(S) CODE Use a screwdriver to pry open the receiver cover as shown. The opener will now operate when the remote control push button is pressed. NOTE: If the remote control push button is not held down until the receiver indicator light flashes, the receiver will not learn the code. To Erase all Remtote Control Codes · Press and hold the "Smart" button on the receiver panel until the indicator light turns off (about 6 seconds). · Repeat Steps 1 and 2 to reprogram the receiver for each remote control transmitter in use. TO SET OUTPUT DURATION WARNING The use of radios incorporating constant closure contacts on residential operators with fail-safe infra-red protectors is prohibited. [. . . ] The jumper must be set to the proper voltage to avoid damage to the receiver. The receiver is factory set at 24V. 114a1526G © 1994, Chamberlain Group, Inc. [. . . ]