User manual LIFT-MASTER 90 827

[. . . ] VARIABLE SPEED MODIFICATION ADDENDUM WARNING APPLICATION This operator is equipped with a variable speed modification. [. . . ] Dynamic brake and current limit circuits replace mechanical brake and clutch respectively, minimizing the number of moving parts that may wear out. Suitable for continuous duty and high cycling applications. Refer to the wiring diagram included with this addendum in lieu of diagrams included with owner's manual. VARIABLE SPEED WITH DECELERATION (OPTIONAL) PART NUMBER: 90-827 When present, provides a adjustable "ramp down" or soft stop at the full open and full close position. MODELS: GH & GT (1/2 - 1HP, 1PH. ONLY) WARNING CAUTION WARNING Safety equipment MUST be used with operators employing this modification. NOTE: This modification will usually affect the horsepower selection for a given model. Higher speeds require higher horsepower for the same door. If you have concerns, consult your representative for specific horsepower rating information on your application. DC Controller Variable Speed DC Motor S C H E M AT I C D I A G R A M VARIABLE SPEED MODIFICATION 1211 SEE NOTE NOTE: When equipped with a Timer to Close the yellow wire will connect from terminal R2 to terminal 1 and the radio will only open and set the timer. 2 S C H E M AT I C D I A G R A M VARIABLE SPEED MODIFICATION WITH OPTIONAL DECELERATION (P/N 90-827) 1639 SEE NOTE NOTE: When equipped with a Timer to Close the yellow wire will connect from terminal R2 to terminal 1 and the radio will only open and set the timer. 3 CONTROL CONNECTION DIAGRAM 3-BUTTON STATION or 3 POSITION KEYSWITCH w/ SPRING RETURN TO CENTER AND STOP BUTTON STANDARD 1 2 3 4 1 2 2 OR MORE 3 4 KEY LOCKOUT 1 2 3 4 Open Close Stop Open Close Stop Open Close Stop Open Close Stop KEY SWITCH ALL WIRING TYPES ALL WIRING TYPES ALL WIRING TYPES 1 BUTTON STATION or ANY AUXILIARY DEVICE 2 BUTTON STATION or 3 POSITION KEY SWITCH w/ SPRING RETURN TO CENTER STANDARD 1 2 4 SEE NOTE #2 1 2 4 SEE NOTE #2 2 OR MORE 3 7 SEE NOTES #2 AND #3 Open Close ALL WIRING TYPES Open Close Open OPEN / CLOSE Close ALL WIRING TYPES B2 or T1 WIRING TYPES ONLY RESIDENTIAL RADIO CONTROLS * OPEN TIMER TO CLOSE R1 R2 R3 EXTERNAL TERMINAL BLOCK SENSING DEVICE TO REVERSE OR STOP 3 10 SENSING DEVICE RADIO CONTROL ALL WIRING TYPES ALL WIRING TYPES * T1 WIRING - RADIO TO OPEN ONLY EXTERNAL INTERLOCK REMOVE JUMPER WHEN INTERLOCK IS USED 4 5 4 5 ONE ALL WIRING TYPES 2 OR MORE IMPORTANT NOTES: 1. [. . . ] Use 16 gauge or heavier wire for all control circuit wiring. © 2006, The Chamberlain Group, Inc. [. . . ]