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Chamberlain 7920KD - page 1
GARAGE DOOR OPENER ASSEMBL Y/INST ALLA TION 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 safe operati ...
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Chamberlain 7920KD - page 2
Before you begin: • Disable locks (contact your door manufacturer for information on disabling your door locks.) • Remove any ropes connected to garage door . • Complete the following test to make sure your garage door is balanced and is not sticking or binding: 1. Lift the door about halfway as shown. Release the door . If balanced, it shoul ...
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Chamberlain 7920KD - page 3
3 PLANNING Identify the type and height of your garage door . If you have a one-piece door , follow the assembly instructions contained in this manual and refer to the Installation Instructions One-Piece Door for installation procedures. Survey your garage area to see if any of the conditions below apply to your installation. Additional materials m ...
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Chamberlain 7920KD - page 4
Chain and Cable in Dispensing Carton Straight Door Arm Section Hanging Brackets Chain Spreader with Screws Motor Unit with Light Lenses (varies depending upon model purchased) Rail Center/Back Sections (4) Rail Front (header) Section (1) “U” Bracket A1 1 Idler Pulley (included with hardware) A12 T rolley A13 Header Bracket A14 Door Bracket A15 ...
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Chamberlain 7920KD - page 5
Nut 5/16" - 18 (4) Clevis Pin 5/16" x 1-1/2" (1) Drywall Anchors (2) Rope Ring Fastener (3) Lock W asher 5/16" (7) Lag Screw 5/16"-18 x 1-7/8" (2) Wing Nut 1/4 x 20 (2) Insulated Staples (30) Rail Grease Hex Bolt 5/16"- 18 x 7/8" (4) Carriage Bolts 1/4"-20 x 1/2" (2) Lag Screw 5/16"- 9 x 1-5/8& ...
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Chamberlain 7920KD - page 6
6 ASSEMBL Y Window Cut-Out Idler Pulley Hole A13 A7 A7 A7 A7 A8 As a temporary trolley stop, insert a screwdriver into the hole 10" (25 cm) away from the front of the rail, as shown. Assemble the Rail Front Rail (T O DOOR) Back Rails (T O MO T OR UNIT) A11 “U” Bracket Window Cut-Out A8 10" (25 cm) As a temporary trolley stop, insert a ...
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Chamberlain 7920KD - page 7
7 Attach Chain Spreader Cable Loop A2 Chain and Cable Do NO T remove Chain/Cable from bo x B2 Lock W asher B7 Nut B5 Idler Bolt Pulley Rail Bolt Nut W asher Cable Loop A12 Idler Pulley A2 Chain and Cable ALL HARDW ARE SHOWN ACTUAL SIZE T o avoid serious damage to opener , ONL Y use bolts/fasteners mounted in top of motor unit. WARNING CAUTION CAUTI ...
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Chamberlain 7920KD - page 8
8 Cable Chain Motor Unit Sprocket A2 Chain and Cable in Dispensing Carton Leave chain/cable inside carton to prevent kinking B4 Master Link Clip-On Spring B1 T rolley Threaded Shaft B4 Master Link Bar Attach Chain T o T rolley Threaded Shaft B1 T rolley Threaded Shaft C6 Lock W asher C5 Outer Nut Insert T rolley Threaded Shaft into Round Hole in T ...
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Chamberlain 7920KD - page 9
If you have a sectional door , proceed to page 10 of this manual. INST ALLA TION IMPORT ANT INST ALLA TION INSTRUCTIONS T o reduce the risk of SEVERE INJUR Y or DEA TH: WARNING CAUTION WARNING WARNING WARNING 1. READ AND FOLLOW ALL INST ALLA TION WARNINGS AND INSTRUCTIONS. 2. Install garage door opener ONL Y on properly balanced and lubricated gara ...
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Chamberlain 7920KD - page 10
-In some installations it may be necessary to install a 2x4 across two studs to create a location for header bracket or over drywall Use lag screws (not provided) to secure 2x4 (structural support) into wood. Use concrete anchors to secure 2x4 into masonry . Add a 2 x 4 as a Structural Support (If Necessary) Highest Point of T ravel 2" (5 cm) ...
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Chamberlain 7920KD - page 11
11 Garage Door A14 Header Bracket A14 Header Bracket Mounting Hole Existing Header Bracket C2 Spacer Mounting Hole Existing Clevis Pin Option with some pre-existing installations C11 Clevis Pin C6 Ring Fastener Opener Carton Ceiling Mount A14 Header Bracket Mounting Hole C11 Clevis Pin C6 Ring Fastener NOTE: If the door spring is in the way , you? ...
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Chamberlain 7920KD - page 12
12 Remove 2 x 4 Close door Attach Hanging Brackets to Ceiling and Fasten Motor Unit to Hanging Brackets Remove 2x4 and Close Door C9 Hex Bolt C4 Nut C5 Lock W asher C8 Lag Screw ALL HARDW ARE SHOWN ACTUAL SIZE 2 x 4 If the top section or panel hits the trolley when you raise the door , pull down on the trolley release arm to disconnect inner and ou ...
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Chamberlain 7920KD - page 13
13 UP Center of Garage Door C10 Self-Threading Screws Metal, insulated or lightweight factory reinforced doors UP Center of Garage Door Bolt 5/16" x 2" (Not Provided) Wood doors Fasten Door Bracket NOTE: The 1/4"-14 x 5/8" self-threading screws are not intended for use on wood doors. OR Door Bracket Location Door Arm Connects Di ...
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Chamberlain 7920KD - page 14
C7 Clevis Pin C21 Clevis Pin C6 Ring Fastener C5 Lock W asher C4 Nut C9 Hex Bolt ALL HARDW ARE SHOWN ACTUAL SIZE Pull Down to Release T rolley C4 Nut C5 Lock W asher C9 Hex Bolt A1 Curved Door Arm A5 Straight Door Arm 14 ENGAGED Attach Emergency Release Rope and Handle C21 Clevis Pin C5 Ring Fastener A5 Straight Door Arm Connect Straight Door Arm t ...
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Chamberlain 7920KD - page 15
15 5 FEET (1.5 m) MINIMUM Door Control Wire Do NOT strip any insulation from the staples C1 Insulated Staple C1 Insulated Staple LOCK LIGHT C12 Screw C15 Drywall Anchors C12 Screw Multi-Function Door Control Multi-Function Door Control: Gang Box Installation Multi-Function Door Control: If, No Gang Box is Present Position Door Control, Route Door C ...
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Chamberlain 7920KD - page 16
16 Ground Wire Black Wire White Wire Black Wire round Tab d Wire ECTION White Wire Black Wire Remove Motor Unit Screws and Cover Remove Power Cord Run Wire from Outlet to Motor Unit Replace Motor Unit Cover and Screws 100 W att (Max) Standard Light Bulb Flex Sides of Light Lens to Remove Lens from T abs Rotate Light Lens Down Install Standard Light ...
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Chamberlain 7920KD - page 17
17 The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. NOTE: DO NOT operate the opener at this time. IMPORT ANT INFORMA TION ABOUT THE SAFETY REVERSING SENSOR When properly connected and aligned, the sensor will detect an obstacle in the path of its electronic beam. The ...
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Chamberlain 7920KD - page 18
18 Wall installation (optional) Door Tr ac k Attach with concrete anchors (not provided) Sensor Beam No Higher Than 6" (15 cm) Above Floor Fasten 2x4 to W all with Lag Screws (Not Provided) Lag Screws (Not Provided) Sensor Beam No Higher Than 6" (15 cm) Above Floor Inside Garage W all Assemble Safety Reversing Sensors Mount Brackets Floor ...
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Chamberlain 7920KD - page 19
19 Sensor Safety Sensor Wire Safety Sensor Wire Sensor C1 Insulated Staple C1 Insulated Staple C1 Insulated Staple Do NOT strip any insulation from the staples Run Safety Sensor Wire to Motor Unit and Secure with Insulated Staples WIRE SAFETY REVERSING SENSOR Locate the quick connect terminals on your garage door opener , they are located on back p ...
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Chamberlain 7920KD - page 20
20 Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSL Y INJURED or KILLED by a closing garage door . • Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system. • If one control (for ce or travel limits) is adjusted, the other contr ...
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Chamberlain 7920KD - page 21
21 ADJUSTMENT STEP 2 Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSL Y INJURED or KILLED by a closing garage door . • T oo much force on garage door will interfere with proper operation of safety reversal system. • NEVER increase for ce beyond minimum amount required to close garage d ...
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Chamberlain 7920KD - page 22
22 TEST THE SAFETY REVERSAL SYSTEM T est • With the door fully open, place a 1-1/2 " (3.8 cm) board (or a 2 x 4 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. Adjust • If the door stops on the obstruction, it is not traveling far enou ...
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Chamberlain 7920KD - page 23
23 IMPORT ANT SAFETY INSTRUCTIONS T o reduce the risk of SEVERE INJUR Y or DEA TH: WARNING CAUTION WARNING WARNING WARNING 1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS. 2. AL W A YS keep remote controls out of reach of children. NEVER permit children to operate or play with garage door control push buttons or remote controls. 3. ONL Y activate ...
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Chamberlain 7920KD - page 24
24 CARE OF YOUR OPENER Limit and Force Adjustments Weather conditions may cause some minor changes in door operation requiring some readjustments, particularly during the first year of operation. Pages 20 and 21 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 7920KD - page 25
25 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 sensors are properly installed, aligned and free of any obstructions. Refer to Installation Step, Install The Protector Sys ...
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Chamberlain 7920KD - page 26
26 Safety reversing sensors wire shorted or black/white wire reversed. Safety reversing sensors wire open (broken or disconnected). OR Symptom: One or both of the Indicator lights on the safety sensors do not glow steady . • Inspect sensor wires for a short (staple in wire), correct wiring polarity (black/white wires reversed), broken or disconne ...
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Chamberlain 7920KD - page 27
KG 1 3 9 7 5 KG 1 3 9 7 5 27 1. Press and release the “learn” button on the motor unit. The learn indicator light will glow steadily for 30 seconds. 2. Within 30 seconds, press and hold the button on the hand-held remote* that you wish to operate your garage door . 3. Release the button when the motor unit lights blink. It has learned the code. ...
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Chamberlain 7920KD - page 28
28 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. ...
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Chamberlain 7920KD - page 29
29 T o replace battery , use the visor clip or screwdriver blade to pry open the case as shown. Insert battery positive side up (+). Dispose of old battery properly . Replace the battery with only 3V2032 coin cell batteries. T o prevent possible SERIOUS INJUR Y or DEA TH: • NEVER allow small children near batteries. • If batter y is swallowed, ...
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Chamberlain 7920KD - page 30
6 5 7 4 3 2 1 30 KEY P ART NO. NO. DESCRIPTION 1 4A1008 Master link kit 2 41C5141-1 Complete trolley assembly 3 183C158-13 Rail - front (header) section 4 183C157-9 Rail - center/back section 5 144C56 Chain idler pulley 6 41A5807 Chain and cable 7 12D598-1 “U” bracket NOT SHOWN 183A163 Wear pads 19A47 Cover protection bolt spacer RAIL ASSEMBL Y ...
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Chamberlain 7920KD - page 31
DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSEMBL Y Grey Wire Y ellow Wire (Up) Contact Center Limit Contact Drive Gear 2 10 8 14 12 15 5 19 3 9 4 16 11 7 18 13 17 6 6 7 1 KEY P ART NO. NO. DESCRIPTION 1 41A5615 Chain Spreader 2 41C4220A Gear and sprocket assembly Complete with: Spring washer , thrust washer , retaining ring, bearing plate, roll ...
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Chamberlain 7920KD - page 32
SECURITY ✚ ® 3-Button Remote Control: Includes visor clip. SECURITY ✚ ® Keyless Entry: Enables homeowner to operate garage door opener from outside by entering a password on a specially designed keyboard. Also can add a temporary password for visitors or service persons. This temporary password can be limited to a programmable number of hours ...
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Chamberlain 7920KD - page 33
33 NOTES ...
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Chamberlain 7920KD - page 34
34 NOTES ...
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Chamberlain 7920KD - page 35
CHAMBERLAIN 1 YEAR LIMITED W ARRANTY 6 YEAR MOT OR LIMITED W ARRANTY PD210D, PD212D, 7920KD & 248730 The Chamberlain Group, Inc. (“Seller”) warrants to the first retail purchaser of this product, for the residence in which this product is originally installed, that it is free from defect in materials and/or workmanship for a period of 1 YEA ...
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Chamberlain 7920KD - page 36
CHAMBERLAIN ® SER VICE IS ON CALL OUR LARGE SERVICE ORGANIZA TION SP ANS AMERICA INST ALLA TION AND SERVICE INFORMA TION IS AS NEAR AS YOUR TELEPHONE. SIMPL Y DIAL OUR T OLL FREE NUMBER: 1-800-528-9131 www .chamberlain-diy .com For professional installation, parts and service, contact your local CHAMBERLAIN ® dealer . Look for him in the Y ellow ...
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