Instruction/ maintenance manual of the product 3850 Chamberlain
Go to page of 40
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.
2 Introduction 2-5 Safety symbol and signal word review . . . . . . . . . . . . . .2 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . .3 T ools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Planning .
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.
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 T orsion Spring Extension Spring O.
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 hit.
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 .
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 .
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 .
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.
Clevis Pin 5/16"x2-3/4" Ring Fastener 10 Header Bracket Belt P u lley Bracket T emporary S u pport Header W all Garage Door Cle v is Pin 5/16"x2-3/4" Ring Fastener Header Bracket B.
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.
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 .
13 T o release w ire, p u sh in ta b w ith scre w dri v er tip Control Console Connections 7/16" (11 mm) Strip w ire 7/16" (1 1 mm) Red Grey W hite INST ALLA TION STEP 6 Install the Control .
14 INST ALLA TION STEP 8 Install the Lights • Press the release tabs on both sides of lens. Gently rotate lens back and downward until the lens hinge is in the fully open position. Do not remove the lens. • Install up to a 100 watt maximum light bulb in each socket.
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.
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.
17 DOOR TRACK MOUNT (RIGHT SIDE) Indicator Light Lens Lip Sensor Bracket Door Track FLOOR MOUNT (RIGHT SIDE) WALL MOUNT (RIGHT SIDE) Indicator Light Sensor Bracket Lens Extension Bracket (See Accessor.
18 Carriage Bolt 1/4"-20x1/2" Lens Wing Nut 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 .
19 Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Contact your door manufacturer for reinforcement kit.
20 Header Wall V ertical Centerline of Garage Door Finished Ceiling Optional Placement of Door Bracket Header Bracket Door Bracket 2x4 Support For a door with no exposed framing, or for the optional installation, use lag screws 5/16"x1-1/2" (Not Provided) to fasten door bracket.
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 .
22 Door Arm Door Arm Connector Hole Closed Door Outer Trolley Emergency Release Handle Inner Trolley Outer Trolley Open Door Door Arm Correct Angle Door with Backward Slant (Incorrect) Inner Trolley Figure 5 ALL ONE-PIECE DOORS 1.
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 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 .
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.
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.
27 Additional feature when used with the 3-button hand-held remote T o control the opener lights: 1. With the door closed, press and hold a small remote button that you want to control the light. 2. Press and hold the Light button on the control console.
28 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.
29 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 .
30 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.
31 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 Sensor Y our garage door opener is programmed with self-diagnostic capabilities.
32 *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.
33 1. Enter a four digit personal identification number (PIN) of your choice on the keypad. Then press and hold ENTER. 2. While holding the ENTER button, press and hold the LIGHT button on the Motion Detecting Door Control Console.
34 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.
35 10 10 10 10 9 1 2 3 8 7 6 4 5 11 11 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 Complete with:.
36 ACCESSORIES CL O SED O PEN 374LM 370LM 915LM 395LM 990LM 1702LM Outside Quick Release: Required for a garage with N O access door . Enables homeowner to open garage door manually from outside by disengaging trolley .
37 NOTES.
38.
39.
© 2006, The Chamberlain Group, Inc. 1 14A3281 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 .
An important point after buying a device Chamberlain 3850 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Chamberlain 3850 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Chamberlain 3850 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Chamberlain 3850 you will learn all the available features of the product, as well as information on its operation. The information that you get Chamberlain 3850 will certainly help you make a decision on the purchase.
If you already are a holder of Chamberlain 3850, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Chamberlain 3850.
However, one of the most important roles played by the user manual is to help in solving problems with Chamberlain 3850. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Chamberlain 3850 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
