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Chamberlain 985 - page 1
Garage Door Opener 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 Protector System ® is connected and properly aligned. ■ Periodic checks of the opener are required to ensure ...
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Chamberlain 985 - page 2
Start by reviewing these important safety alert symbols: 2 Contents Page A review of safety alert symbols . . . . . . . . . . . . . .2 You'll need tools . . . . . . . . . . . . . . . . . . . . . . . . . .3 Safety information (door locks and ropes) . . . . . . .3 Testing your garage door for sticking, binding and balance . . . . . . . . . . . . ...
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Chamberlain 985 - page 3
3 SECTIONAL DOOR ONE-PIECE DOOR Pliers Wire Cutters Claw Hammer Hack Saw Screwdriver Adjustable End Wrench 1/2" and 7/16" Sockets and Wrench Drill Tape Measure 2 1 Stepladder Pencil 3/16", 5/16" and 5/32" Drill Bits Carpenter's Level Y ou'll Need T ools During assembly , installation and ad justment of t he opener ...
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Chamberlain 985 - page 4
Safety Reversing Sensor Slack in chain tension is normal when garage door is closed Header Wall Safety Reversing Sensor Access Door FINISHED CEILING Support bracket & fastening hardware is required. See page 13. Gap between floor and bottom of door must not exceed 1/4". Access Door Floor must be level across width of door Safety Reversing ...
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Chamberlain 985 - page 5
SECURITY ✚ Single-Function Remote Control Straight Door Arm Section Curved Door Arm Section Safety Labels and Literature Header Bracket UP CEILING MOUNT ONLY Sprocket Cover 2-Conductor Bell Wire White & White/Red Light Lens (1) Remote Control Visor Clip Door Bracket One-Piece T-rail Styrofoam Chain Pulley Bracket Trolley Chain Door Control Bu ...
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Chamberlain 985 - page 6
Assembly Step 1 Attach the T -rail to the Opener To fasten rail, use only those screws mounted in top of the opener. Failure to do so will cause serious damage to the opener. 6 USE ONLY THIS TYPE AND SIZE SCREW Washered Screw 5/16"-18x1/2" Styrofoam Chain T-rail Hole Assembly Step 2 Attach Chain to Sprocket and Install Sprocket Cover • ...
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Chamberlain 985 - page 7
• Spin the inner nut and lock washer down the threaded shaft, away from the trolley. • To tighten the chain, turn outer nut in the direction shown. As you turn the nut, keep the chain from twisting. • When the chain is approximately 1/2" above the base of the T-rail at its midpoint, re-tighten the inner nut to secure the adjustment. Spro ...
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Chamberlain 985 - page 8
• Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on the header wall 2" above the high point. This height will provide travel clearance for the top edge of the door. Header Wall Ceiling Track Highest Point of Travel Door 2" 8 Proceed to Step 2, page 10. Door Track Header Wall Highest Point of ...
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Chamberlain 985 - page 9
Header Wall Vertical Centerline Vertical Centerline of Garage Door 2x4 Unfinished Ceiling Structural Supports 2x4 OPTIONAL CEILING MOUNT FOR HEADER BRACKET • Close the door and mark the inside vertical centerline of your garage door. Extend the line onto the header wall above door. If headroom clearance is minimal, you can install the header brac ...
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Chamberlain 985 - page 10
Lag Screws 5/16"-9x1-5/8" Highest Point of Travel (of Garage Door) Vertical Center Line Header Wall Garage Door UP CEILING MOUNT ONLY Wall Mounting Holes Optional Wall Mounting Holes The nail hole is for positioning only. You must use lag screws to mount the header bracket. UP CEILING MOUNT ONLY Door Spring Header Bracket 2x4 Structural S ...
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Chamberlain 985 - page 11
Header Bracket Chain Pulley Bracket Temporary Support Header Wall Garage Door T-rail Clevis Pin 5/16"x2-3/4 " Ring Fastener Header Bracket Chain Pulley Bracket T-rail • Position the opener on the garage floor below the header bracket. Use packing material as a protective base. If the door spring is in the way you'll need help. Have ...
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Chamberlain 985 - page 12
Installation Step 4 Position the Opener Follow instructions which apply to your door type as illustrated. To prevent damage to steel, aluminum, fiberglass or glass panel doors, do not rest the opener on the door without using a 2x4. SECTIONAL Door & ONE-PIECE Door with T rack T-rail 2x4 Door Stepladder ONE-PIECE Door without T rack • With the ...
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Chamberlain 985 - page 13
Installation Step 5 Hang the Opener Two representative installations are shown. Yours may be different. Hanging brackets should be angled, Figure 1, to provide rigid support. On finished ceilings, Figure 2, attach a sturdy metal bracket to structural supports before installing the opener. The bracket and fastening hardware are not supplied. • Mea ...
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Chamberlain 985 - page 14
14 Installation Step 6 Install the Door Control Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause serious injury or death. Install the Door Control (or any additional push buttons) out of the reach of children and away from all moving parts of the door and door hardware, b ...
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Chamberlain 985 - page 15
Installation Step 8 Attach the Manual Release Rope and Handle Do not use the red handle to pull the door open or closed. The rope knot could become untied and you could fall. Use the manual release only to disengage the trolley and, if possible, only when the door is closed. Garage doors are heavy. If the door is open when the handle is pulled, the ...
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Chamberlain 985 - page 16
To 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, contact a qualified electrician to install the proper outlet. To avoid installation difficulties, do not run the opener at th ...
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Chamberlain 985 - page 17
Without a properly working safety reversing sensor, persons (particularly children) could be injured or killed by a closing garage door. Read and follow all instructions. To protect small children, install the safety reversing sensor so that the beam will be no higher than 4"-6" above the garage floor. Disconnect power to the garage door ...
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Chamberlain 985 - page 18
Installation Step 10 Install the Safety Reversing Sensor (Receiving and Sending Eyes) 18 FLOOR MOUNT (Right Side) WALL MOUNT (Right Side) DOOR TRACK MOUNT (Right Side) Indicator light Lens Lip Sensor Brack et Door T r ack Sensor Brack et Optional Extension Bracket (See Accessories) Lens Indicator light Attach with concrete anchors (not provided) In ...
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Chamberlain 985 - page 19
Invisible Light Beam Protection Area Sensor Sensor Connect Wire to Opener Terminals Bell Wire Bell Wire Finished Ceiling OPENER TERMINAL SCREWS Sensor Connections Door Control Connections (dotted line) 1 2 3 19 Figure 6 Wiring the Safety Sensors 1/4"-20x1/2" Carriage bolt Lens Wing nut Figure 5 MOUNTING AND WIRING THE SAFETY SENSORS • S ...
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Chamberlain 985 - page 20
Installation Step 1 1 Fasten Door Bracket Follow instructions which apply to your door type as illustrated below or on page 21. To prevent damage to steel, aluminum, fiberglass or glass panel doors, always reinforce the inside of the door both vertically and horizontally with angle iron. A horizontal brace should be long enough to be secured to 2 v ...
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Chamberlain 985 - page 21
Door Bracket Inside Edge of Door or Reinforcement Board Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, aluminum, steel, door with glass panel, etc.). (Not Provided) Header Wall Vertical Centerline of Garage Door — Finished Ceiling — Header Bracket 2x4 Support Door Bracket All ONE-PIECE Door Installatio ...
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Chamberlain 985 - page 22
Installation Step 12 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on page 23. Make sure garage door is fully closed. Pull the manual release handle to disconnect the outer trolley from the inner trolley. Slide the outer trolley back (away from the door) about 2" as shown in Figures 1, 2 ...
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Chamberlain 985 - page 23
Nuts 5/16"-18 Lock Washers 5/16" Ring Fastener Straight Door Arm Screws 5/16"-18x7/8" Door Bracket 5/16"x1-1/4" Clevis Pin Curved Door Arm Fully Open Trolley Door Arm Connector Hole Door Arm Closed Door Open Door Door with Backward Slant Door Arm Connector Hole Fully Closed Trolley Door Arm Can/DoorArmToTrolley 1 c All ...
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Chamberlain 985 - page 24
Adjustment Step 1 Adjust the UP and DOWN Limits Do not make any limit adjustments until the Safety Reversing Sensors are completely installed. 24 Limit adjustment settings regulate the points at which the door will stop when moving up or down. The door will stop in the up direction if anything interferes with door travel. The door will reverse in t ...
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Chamberlain 985 - page 25
Adjustment Step 2 Adjust the Force Too much force on the door will interfere with the proper operation of the safety reverse system. The door might not reverse properly when required and could seriously injure or kill someone under it. Do not increase the force beyond the minimum required to close the door. Do not use the force adjustments to compe ...
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Chamberlain 985 - page 26
Adjustment Step 4 T est the Safety Reverse System Test: • With the door fully open, place a one-inch board (or a 2x4 laid flat) on the floor, centered under the garage door. • Operate the door in the down direction. The door must reverse on striking the obstruction. Adjustment: If the door stops on the obstruction, it is not traveling far enoug ...
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Chamberlain 985 - page 27
Once a Month Manually operate door. If it is unbalanced or binding, call for professional garage door service. Check to be sure door opens & closes fully. Adjust limits and/or force if necessary. (See pages 24 and 25.) Repeat the safety reverse test. Make any necessary adjustments (See page 26). Twice a Year Check chain tension. Disconnect trol ...
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Chamberlain 985 - page 28
To open the door manually: The door should be fully closed if possible. Pull down on the red manual release handle and lift the door manually. To reconnect the door to the opener, press the Door Control push bar. 28 Activate the opener with any of the following: • The Remote Control Transmitter. Hold push button down until the door starts to move ...
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Chamberlain 985 - page 29
Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause serious injury or death. Do not allow children to operate the door control(s) or remote control transmitter(s). A moving garage door could injure or kill someone under it. Activate the opener only when you can see the door ...
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Chamberlain 985 - page 30
1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.) 2. Have you disabled all door locks? Review installation instruction warnings on Page 7. 3. Is there a build-up of ice or snow under the door? The door may be froze ...
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Chamberlain 985 - page 31
The chain droops or sags: It is normal for the chain to droop slightly in the closed door position. Use the manual release rope and handle to disconnect the trolley. If the chain returns to the normal height when the trolley is disengaged and the door reverses on a 2x4 laid flat, no adjustments are needed. (See page 7.) 31 Having a Problem? (contin ...
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Chamberlain 985 - page 32
6 11 10 4 NOTICE 5 UP CEILING MOUNT ONLY 7 8 3 2 1 9 12 1 3 4 5 2 RAIL GREASE NO. 83A4 6 Repair Parts Rail Assembly Parts Installation Parts 32 KEY PART NO. NO. DESCRIPTION 1 1A995 Master link kit 2 41B4813 Chain pulley bracket 3 41A3489 Complete trolley assembly 4 183B99 One-piece T-rail 5 41A3484 Full chain assembly 6 83A4 Rail grease KEY PART NO ...
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Chamberlain 985 - page 33
Repair Parts 2 10 8 13 14 15 16 19 4 3 DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSY. Grey Wire Yellow Wire (Up) Contact Center Limit Contact Drive Gear 9 20 16 12 18 11 17 3 1 5 6 7 33 Opener Assembly Parts KEY PART NO. NO. DESCRIPTION 1 31D380 Sprocket cover 2 41C4220A Gear and sprocket assembly Complete with: Spring washer, Thrust washer, Re ...
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Chamberlain 985 - page 34
34 We recommend t hat you program your code before you install the K eyless Entry . Y ou will not need assistance, and you can test t he reception at the mounting location before installation. 1. Choose a 4-digit code using numbers from 0 to 9 (a number can be used more than once, for example, 4, 0, 4, 1). 2. Press the four buttons for t he code, t ...
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Chamberlain 985 - page 35
Index Access Door/Outside Quick Release Accessory ........................................................................................31, 34 Chain Tension ..............................................................................................................................................4, 7, 31 Electrical Safety Warnings ............. ...
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Chamberlain 985 - page 36
© 2000, The Chamberlain Group, Inc. 114A2289C All Rights Reserved Printed in Mexico SER VICE IS ON CALL OUR LARGE SERVICE ORGANIZATION SPANS AMERICA AND CANADA INSTALLATION AND SERVICE INFORMATION IS AS NEAR AS YOUR TELEPHONE SIX DAYS A WEEK. SIMPLY DIAL OUR TOLL FREE NUMBER: 1-800-654-4736 HOURS: (Central Std. Time) 6:00 A.M. TO 7:00 P.M. - Monda ...
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