Chamberlain 3850 manual

The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1 196 www .liftmaster .com GARAGE DOOR OPENER Model 3850 For Residential Use Only Owner’s Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near the garage door after installation. ■ The door WILL NOT CLOSE unless the Protec[...]

2 Introduction 2-5 Safety symbol and signal word review . . . . . . . . . . . . . .2 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . .3 T ools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Carton inventory . . . .[...]

3 T o prevent damage to garage door and opener: • AL WA YS disable locks BEFORE installing and operating the opener . • ONL Y operate garage door opener at 120V , 60 Hz to avoid malfunction and damage. T o prevent possible SERIOUS INJURY or DEA TH: • AL WA YS call a trained door systems technician if garage door binds, sticks, or is out of ba[...]

Safety Re v ersing Sensor S u pport b racket & fastening hard w are is re qu ired. See page 12. — — — — — — — — Header W all FI N ISHED CEILI N G Torsion Spring Extension Spring OR Safety Re v ersing Sensor Gap b et w een floor and b ottom of door m u st not exceed 1/4" (6 mm) Access Door W all- mo u nted Door Control Horiz[...]

5 Straight Door Arm Section C u r v ed Door Arm Section Safety La b els and Literat u re Header Bracket U P C E IL I N G M O U N T O N L Y Belt Cap Retainer 2-Cond u ctor Bell W ire W hite & W hite/Red Remote Control Visor Clip Door Bracket One-Piece Rail Styrofoam Belt P u lley Bracket Belt Trolley SECURITY ✚ ® 3-B u tton Remote Control The[...]

6 ASSEMBL Y STEP 1 Attach the Rail to the Motor Unit T o avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted on top of motor unit. • Align rail and styrofoam over belt pulley . Cut tape from rail, chain and styrofoam. • REMO V E STYROFOAM. • Insert both washer[...]

7 ASSEMBL Y STEP 3 Attach the Belt Cap Retainer • Position the belt cap retainer over the motor unit belt pulley so the three holes in cap align with the three holes in mounting plate. Attach with #8x3/8" hex screws provided. Y ou have now finished assembling your garage door opener . Please read the following warnings before proceeding to t[...]

8 INST ALLA TION STEP 1 Determine the Header Bracket Location Installation procedures vary according to garage door types. Follow the instructions which apply to your door . 1. Close the door and mark the inside vertical centerline of the garage door . 2. Extend the line onto the header wall above the door . Y ou can fasten the header bracket withi[...]

9 INST ALLA TION STEP 2 Install the Header Bracket Y ou can attach the header bracket either to the wall above the garage door , or to the ceiling. Follow the instructions which will work best for your particular requirements. Do not install the header bracket over drywall. If installing into masonry , use concrete anchors (not provided). W ALL HEA[...]

Cle v is Pin 5/16"x2-3/4" Ring Fastener 10 Header Bracket Belt P u lley Bracket Temporary S u pport Header W all Garage Door Cle v is Pin 5/16"x2-3/4" Ring Fastener Header Bracket Belt P u lley Bracket Rail HARDW ARE SHOWN ACTUAL SIZE INST ALLA TION STEP 3 Attach the Rail to the Header Bracket • Position the opener on the gara[...]

11 ONE-PIECE DOOR WITHOUT TRACK • With the door fully open and parallel to the floor , measure the distance from the floor to the top of the door . • Using a stepladder as a support, raise the top of the opener to this height. • The top of the door should be level with the top of the motor unit. Do not position the opener more than 4" (1[...]

12 INST ALLA TION STEP 5 Hang the Opener Three representative installations are shown. Y ours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support. On finished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the opener . This bracket and fastening hardware a[...]

Strip w ire 7/16" (1 1 mm) Red Grey W hite T o release w ire, p u sh in ta b w ith scre w dri v er tip Control Console Connections 7/16" (1 1 mm) 13 INST ALLA TION STEP 6 Install the Control Console Dry w all Anchors Ins u lated Staples Scre w 6ABx1-1/4" (std installation) Scre w 6-32x1" (pre- w ired) HARDW ARE SHOWN ACTUAL SIZE[...]

14 Lens Hinge 100 W att (Max) Standard Light B u l b Release Ta b 100 W att (Max) Standard Light B u l b INST ALLA TION STEP 7 Install the Battery Backup (Optional) • Make sure motor unit is unplugged. • Using a Phillips head screwdriver , remove the battery cover on the motor unit. • Partially insert battery into motor unit with terminals fa[...]

15 INST ALLA TION STEP 10 Electrical Requirements T o avoid installation difficulties, do not run the opener at this time. T o reduce the risk of electric shock, your garage door opener has a grounding type plug with a third grounding pin. This plug will only fit into a grounding type outlet. If the plug doesn’t fit into the outlet you have, cont[...]

16 Facing the door from inside the garage INST ALLA TION STEP 11 Install The Protector System ® The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. IMPORT ANT INFORMA TION ABOUT THE SAFETY REVERSING SENSOR When properly connected and aligned, the sensor will detect an o[...]

17 DOOR TRACK MOUNT (RIGHT SIDE) Indicator Light Lens Lip Sensor Bracket Door T rack FLOOR MOUNT (RIGHT SIDE) W ALL MOUNT (RIGHT SIDE) Indicator Light Sensor Bracket Lens Extension Bracket (See Accessories) Inside G arage W al l (Pro v ided w ith Extension Bracket) (Pro v ided w ith Extension Bracket) Fi g ure 1 Fi g ure 2 Fi g ure 3 Fi g ure 4 W A[...]

18 Carriage Bolt 1/4"-20x1/2" Lens W ing Nu t 1/4"-20 Figure 5 MOUNTING AND WIRING THE SAFETY REVERSING SENSORS • Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor . Use wing nuts to fasten sensors to brackets, with lenses pointing toward each other across the door . Be sure the lens is not obstructed b[...]

19 Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Contact your door manufacturer for reinforcement kit. WARN ING CAUTION WARN ING WARN ING INST ALLA TION STEP 12 Fasten the Door Bracket Follow instructions which apply to your door type as illustrated below or on the following p[...]

20 Header W all V ertical Centerline of Garage Door Finished Ceilin g Optional Placement of Door Bracket Header Bracket Door Bracket 2x4 S u pport For a door w ith no exposed framing, or for the optional installation, u se lag scre w s 5/16"x1-1/2" ( N ot Pro v ided) to fasten door b racket. MET AL DOOR T op of Door (Inside Garage) Door B[...]

21 INST ALLA TION STEP 13 Connect Door Arm to T rolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONL Y Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley . Slide the outer trolley back (away from the d[...]

22 Door Arm Door Arm Connector Hole Closed Door O u ter T rolley Emergency Release Handle Inner T rolley O u ter T rolley Open Door Door Arm Correct Angle Door w ith Back w ard Slant (Incorrect) Inner T rolley Figure 5 ALL ONE-PIECE DOORS 1. Assemble the Door Arm: • Fasten the straight and curved door arm sections together to the longest possible[...]

ADJUSTMENT STEP 1 Program the T ravel Limits Travel limits regulate the points at which the door will stop when moving up or down. Follow the steps below to set the limits. T o program the travel limits: Adjust the position of the door by using the black and purple buttons. Black moves the door UP (open) and purple moves the door DOWN (close). 1. S[...]

Black B u tton P u rple B u tton P u sh P u rple bu tton t w ice to enter u nit into Indicator Light 24 ADJUSTMENT STEP 2 Setting the Force The force setting button is located on the left panel of the motor unit. The force setting measures the amount of force required to open and close the door . 1. Locate the purple button on the left panel of the[...]

25 Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSL Y INJURED or KILLED by a closing garage door . • Safety reversal system MUST be tested ever y month. • After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" high (3.8 [...]

26 Using Y our Garage Door Opener Y our Security ✚ ® opener and hand-held remote control have been factory-set to a matching code which changes with each use, randomly accessing over 100 billion new codes. Y our opener will operate with up to eight Security ✚ ® remote controls and one Security ✚ ® Keyless Entry System. If you purchase a ne[...]

27 Using the W all-Mounted Control Console THE LCD MOTION DETECTING CONTROL CONSOLE Press the push bar to open or close the door . Press again to reverse the door during the closing cycle or to stop the door while it ' s opening. This door control contains a motion sensing detector that will automatically turn on the light when it detects a pe[...]

28 T o Open the Door Manually The door should be fully closed if possible. Pull down on the emergency release handle and lift the door manually . T o reconnect the door to the opener , press the control console push bar . The lockout feature prevents the trolley from reconnecting automatically . Pull the emergency release handle down and back (towa[...]

29 NOTE: LED is most visible with worklight off. GREEN LED: All systems are normal. • A solid LED light indicates the battery is fully charged. • A flashing LED indicates the battery is being charged. NOTE: Battery do not have to be fully charged to operate the motor unit. ORANGE LED: The motor unit has lost power and is operating off of the ba[...]

30 Care of Y our Opener MAINTENANCE SCHEDULE Once a Month • Manually operate door . If it is unbalanced or binding, call a trained door systems technician. • Check to be sure door opens & closes fully . Adjust limits and/or force if necessary (see pages 23 and 24). • Repeat the safety reverse test. Make any necessary adjustments (see Adju[...]

31 Having a Problem (T roubleshooting) NOTE: Always unplug battery prior to troubleshooting. 1. My door will not close and the light bulbs blink on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. • V erify the safety reversing sensors are properly in[...]

32 Bell W ire Safety Re v ersing Sensor Diagnostics Located On Motor Unit “Learn” B u tton LED or Diagnostic LED “Learn” B u tton Installed Safety Re v ersing Sensor Y our garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will flash a number of times then pause signifying it has found [...]

33 *3-Button Remotes If provided with your garage door opener , the large button is factory programmed to operate it. Additional buttons on any Security ✚ ® 3-button remote or mini-remote can be programmed to operate other Security ✚ ® garage door openers. T o Erase All Codes From Motor Unit Memory T o deactivate any unwanted remote, first er[...]

34 1. Press and release the “learn” button on motor unit. The learn indicator light will glow steadily for 30 seconds. 2. Within 30 seconds, enter a four digit personal identification number (PIN) of your choice on the keypad. Then press and hold the ENTER button. 3. Release the button when the motor unit lights blink. It has learned the code. [...]

35 2 5 6 1 3 7 8 4 KEY P ART NO. NO. DESCRIPTION 1 4A1008 Master link kit 2 41B5424 Belt pulley bracket 3 41B3869-1 Complete trolley assembly 4 109B33 T rolley clip 5 2777BD One-piece rail 6 41A5434-1 1 Full belt assembly 7 41B4103 T ensioner assembly 8 83A1 1-2 Rail grease 7 10 11 5 N O TIC E U P C E I L I N G M O U N T O N L Y 8 6 1 4 3 2 9 12 13[...]

36 2 1 11 7 3 8 6 4 5 9 10 10 KEY P ART NO. NO. DESCRIPTION 1 41C76 Belt cap and sprocket 2 41B4245 Line cord 3 41B4375-3 T erminal block with screws 4 41A6281 Wire harness kit 5 41D794 Motor with positioning sensor 6 41DB002-2 Receiver logic assembly KEY P ART NO. NO. DESCRIPTION 7 41A6231 End panel with battery door and screw 8 41C190 T ransforme[...]

37 ACCESSORIES C L O SED O P EN 374LM 370LM 915LM 395LM 990LM 1702LM Outside Quick Release: Required for a garage with NO access door . Enables homeowner to open garage door manually from outside by disengaging trolley . Remote Light Control: Enables homeowner to turn on a lamp, television or other appliance from car , bedside, or anywhere in the h[...]

38 NOTES[...]

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© 2006, The Chamberlain Group, Inc. 1 14A3281B All Rights Reserved HOW T O ORDER REP AIR P ARTS Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly . WHEN ORDERING REP AIR P ARTS, AL W A YS GIVE THE FOLLOWING INFORMA TION: • P ART NUMBER • P ART NAME • MODEL NUMBER ADDR[...]