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Chamberlain 7902 - page 1
The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1 196 www .chamberlain.com GARAGE DOOR OPENER Models 7902 • 7902K 1/2 HP 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 CL ...
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Chamberlain 7902 - page 2
2 Introduction 2-5 Safety symbol and signal word review ........................2 Preparing your garage door ........................................3 T ools needed ...............................................................3 Planning ..................................................................4-5 Carton inventory ........................ ...
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Chamberlain 7902 - page 3
3 To 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. To 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 bala ...
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Chamberlain 7902 - page 4
Safety Reversing Sensor Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.). See page 24 for details. FINISHED CEILING Support bracket & fastening hardware is required. See page 20. — — — — — — — — Door Center Header Wall Safety Reversing Sensor ...
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Chamberlain 7902 - page 5
5 Access Door Safety Reversing Sensor Safety Reversing Sensor Header Bracket Door Bracket Straight Door Arm Curved Door Arm Trolley Emergency Release Rope & Handle Rail Garage Door Header Wall Rail Bracket CLOSED POSITION Gap between floor and bottom of door must not exceed 1/4" Planning (Continued) ONE-PIECE DOOR INST ALLA TIONS • Gener ...
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Chamberlain 7902 - page 6
6 Straight Door Arm Section Curved Door Arm Section Header Bracket U P C E I L I N G M O U N T O N L Y Sprocket Coupling 2-Conductor Bell Wire White & White/Red Header/Rail Brackets Remote Control Transmitter Visor Clip Trolley Rail Support Braces (4) Hanging Brackets Rail Door Bracket 3-Button SECURITY ✚ Remote Control (2) Multi-Function Doo ...
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Chamberlain 7902 - page 7
7 Hardwar e Inventor y Separate all hardware and group as shown below for the assembly and installation procedures. Lock Nut 1/4"-20 (12) Wing Nut 1/4"-20 (2) Carriage Bolt 1/4"-20x1/2" (2) Hex Bolt 1/4" -20x5/8" (4) Sprocket Coupling Sleeve Bolt 1/4"-20x1-3/4" (8) NOTICE Handle Nut 5/16"-18 (4) Ring Fas ...
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Chamberlain 7902 - page 8
8 ASSEMBL Y STEP 1 Assemble the Rail To avoid installation difficulties, do not run the garage door opener until instructed to do so. 1. Turn the opened rail carton upside down and empty its contents onto a level work surface. 2. Unfold the rails, taking care to avoid kinking the screw rod joint. 3. Rotate the rail sections so that the flat side is ...
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Chamberlain 7902 - page 9
9 Assemble the Rail (Continued) 4. Beginning with the sprocket end, straighten the two rail sections so that the screw rod is in a straight line at the joint. (Avoid handling the joint, which may have sharp edges.) 5. Carefully slide the pins at the top edge of the rail into the openings on the adjacent rail. It is essential that the rail assembly ...
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Chamberlain 7902 - page 10
10 ASSEMBL Y STEP 2 Fasten the Rail to the Motor Unit and Install the T rolley To aid in assembly and installation, replace the foam packing around the motor unit. Remove it after Installation Step 5. •W orking on a level surface, align the rail assembly with the motor unit, as shown. • Slip the coupling over the rail sprocket. • Slide the ra ...
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Chamberlain 7902 - page 11
11 ASSEMBL Y STEP 3 Attach the Rail Brackets • Align rail brackets to end of rail assembly , as shown. • Insert two 1/4"-20 x 5/8" hex bolts and lock nuts. T ighten securely with a 7/16" socket. Y ou have now finished assembling your garage door opener . Please read the following warnings before proceeding to the installation sec ...
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Chamberlain 7902 - page 12
12 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 . SECTIONAL DOOR AND ONE-PIECE DOOR WITH TRACK 1. Close the door and mark the inside vertical centerline of the garage door . 2. Extend the line onto the header wall above the d ...
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Chamberlain 7902 - page 13
13 Header Wall Vertical Centerline Vertical Centerline of Garage Door 2x4 Unfinished Ceiling 2x4 OPTIONAL CEILING MOUNT FOR HEADER BRACKET Structural Supports ONE-PIECE DOOR WITHOUT TRACK 1. Close the door and mark the inside vertical centerline of your garage door . Extend the line onto the header wall above door , as shown. If headroom clearance ...
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Chamberlain 7902 - page 14
14 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 HE ...
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Chamberlain 7902 - page 15
Clevis Pin 5/16"x2-3/4" Ring Fastener 15 INST ALLA TION STEP 3 Attach the Rail to the Header Bracket • Position the opener on the garage floor below the header bracket. Use packing material as a protective base. NOTE: If the door spring is in the way you’ll need help. Have someone hold the opener securely on a temporary support to all ...
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Chamberlain 7902 - page 16
16 Invisible Light Beam Protection Area Sensor Beam 6" max. above floor Sensor Beam 6" max. above floor Facing the door from inside the garage INST ALLA TION STEP 4 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 I ...
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Chamberlain 7902 - page 17
17 FLOOR MOUNT (RIGHT SIDE) WALL MOUNT (RIGHT SIDE) DOOR TRACK MOUNT (RIGHT SIDE) Indicator light Lens Lip Sensor Bracket Door Track Sensor Bracket Extension Bracket (See Accessories) Lens Indicator light Attach with concrete anchors (not provided) Inside G arage W all Indicator light Sensor Bracket Lens Extension Bracket (See Accessories) Inside G ...
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Chamberlain 7902 - page 18
18 Carriage bolt 1/4"-20x1/2" Lens Wing nut Figure 4 MOUNTING AND WIRING THE SAFETY 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 by a bracket extension (Fi ...
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Chamberlain 7902 - page 19
19 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 3" ab ...
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Chamberlain 7902 - page 20
20 INST ALLA TION STEP 6 Hang the Opener T wo 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), attach a sturdy metal bracket to structural supports before installing the opener . This bracket and fastening hardware are not provide ...
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Chamberlain 7902 - page 21
To release wire, push in tab with screwdriver tip Door Control Connections 7/16" Strip wire 7/16" Red Black White 21 INST ALLA TION STEP 7 Install the Door Control Locate door control within sight of the door at a minimum height of 5 feet where small children cannot reach, and aw ay from moving par ts of the door and door hardware. The in ...
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Chamberlain 7902 - page 22
22 INST ALLA TION STEP 8 Install the Lights • Install up to a 100 watt maximum light bulb in each sock et. The lights will tur n ON and remain lit for appro ximately 4-1/2 minutes when power is connected. Then the lights will tur n OFF . • Inser t bottom lens tabs into slots on chassis. Tilt tow ards chassis to engage top tabs, then drop down g ...
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Chamberlain 7902 - page 23
23 INST ALLA TION STEP 10 Electrical Requirements T o av oid installation difficulties, do not run the opener until Step 11 below . T o reduce the r isk 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 y ...
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Chamberlain 7902 - page 24
24 INST ALLA TION STEP 12 Fasten the Door Bracket F ollow instructions which apply to your door type as illustrated below or on the f ollowing page. A horizontal reinfor cement brace should be long enough to be secured to two or three ver tical supports. A ver tical reinfor cement brace should cover the height of the top panel. Figure 1 shows one p ...
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Chamberlain 7902 - page 25
25 Header Wall Vertical 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 5/16"x1-1/2" lag screws (Not provided) to fasten door bracket. MET AL DOOR Top of Door (Inside Garage) Door Bracket Optional ...
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Chamberlain 7902 - page 26
26 INST ALLA TION STEP 13 Connect Door Arm to T rolley F ollow instructions which apply to your door type as illustrated below and on the f ollowing 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 (aw ay fro ...
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Chamberlain 7902 - page 27
27 ALL ONE-PIECE DOORS 1. Assemble the door arm, Figure 4: • F asten the straight and cur ved door ar m sections together to the longest possible length (with a 2 or 3 hole ov erlap). • With the door closed, connect the straight door arm section to the door brack et with the 5/16"x1-1/4" cle vis pin. • Secure with a r ing fastener . ...
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Chamberlain 7902 - page 28
28 ADJUSTMENT STEP 1 Adjust the UP and DOWN T ravel Limits Limit adjustment settings regulate the points at which the door will stop when moving up or down. T o operate the opener , press the Door Control push bar . Run the opener through a complete trav el cycle. • Does the door open and close completely? • Does the door sta y closed and not r ...
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Chamberlain 7902 - page 29
ADJUSTMENT STEP 2 Adjust the Force F orce adjustment controls are located on the back panel of the motor unit. Force adjustment settings regulate the amount of pow er required to open and close the door . If the f orces are set too light, door trav el may be interrupted by nuisance rev ersals in the down direction and stops in the up direction. W e ...
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Chamberlain 7902 - page 30
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 every month. • If one control (force or travel limits) is adjusted, the other control may also need adjustment. • After ANY adjustments are made, th ...
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Chamberlain 7902 - page 31
OPERA TION 31 IMPORT ANT SAFETY INSTRUCTIONS To reduce the risk of severe injury or death: 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 ✚ ...
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Chamberlain 7902 - page 32
To Open the Door Manually DISCONNECT TROLLEY : The door should be fully closed if possible. Pull down on the emergency release handle (so that the trolley release arm snaps into a vertical position) and lift the door manually . The lockout feature prevents the trolley from reconnecting automatically , and the door can be raised and lowered manually ...
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Chamberlain 7902 - page 33
CARE OF YOUR OPENER LIMIT AND FORCE ADJUSTMENTS: W eather conditions may cause some minor changes in door operation requiring some re-adjustments, particularly during the first year of operation. Pages 28 and 29 refer to the limit and force adjustments. Only a screwdriver is required. Follow the instructions carefully . Repeat the safety reverse te ...
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Chamberlain 7902 - page 34
34 Having a Problem? (Continued) 6. The garage door opens and closes by itself: • Be sure that all remote control push buttons are off. • Remove the bell wire from the door control terminals and operate from the remote only . If this solves the problem, the door control is faulty (replace), or there is an intermittent short on the wire between ...
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Chamberlain 7902 - page 35
*Multi-Function Remotes If provided with your garage door opener , the large button is factory programmed to operate it. Additional buttons on any Security ✚ multi-function remote or mini-remote can be programmed to operate other Security ✚ garage door openers. To Erase All Codes From Motor Unit Memory To deactivate any unwanted remote, first e ...
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Chamberlain 7902 - page 36
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 Multi-Function Door Control. 3. Continue holding the ENTER and LIGHT buttons while you press the push bar on the Multi-Function Door Control (all three buttons ...
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Chamberlain 7902 - page 37
7 U P C E I L I N G M O U N T O N L Y 9 10 11 NOTICE 5 6 8 4 12 13 1 L O C K L IG H T 3 2 KEY P ART NO. NO. DESCRIPTION 1 41A5273-9 Multi-function door control 2 41A5056-18 3-Button remote control case (no circuit board) 3 10A20 3V 2032 Lithium battery (1 required) 4 29B137 Visor clip 5 41A2828 Emergency release rope & handle assy . 6 217A238 2 ...
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Chamberlain 7902 - page 38
Motor Unit Assembly Parts 38 DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSY. Grey Wire Yellow Wire (Up) Contact Center Limit Contact Drive Gear 2 1 3 4 5 6 7 8 8a 8b 8c 9 10 11 11a 11 12 13 14 15 16 17 8d 8d 8e 8f 8g 18 KEY P ART NO. NO. DESCRIPTION 1 31D477 Drive shaft cover 2 41B4245 Line cord 3 30B363 Capacitor – 1/2 HP 4 12A373 Capacitor b ...
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Chamberlain 7902 - page 39
39 ACCESSORIES L O C K L IG H T LOCK LIGHT 7706CB 41A5281 956CB 953CB 935CB 950CB 1-Button Security ✚ ™ Remote Control: Includes visor clip. 3-Button Security ✚ ™ Remote Control: Includes visor clip. 3-Button Mini-Remote Control with Security ✚ ™: With key ring and V elcro fastening strip. Outside Quick Release: Required for a garage wi ...
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Chamberlain 7902 - page 40
© 2003, The Chamberlain Group, Inc. 1 14A2488E All Rights Reserved Printed in Mexico 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 • ...
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