Chamberlain 3840 User Manual

GARAGE DOOR OPENER

Model 3840

For Residential Use Only

The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196

www.LiftMaster.com

Owner’s Manual

■ Please read this manual and the enclosed safety materials carefully!

is connected

■ Fasten the manual near the garage door after installation.

■ The door WILL NOT CLOSE unless the Protector System

and properly aligned.

■ Periodic checks of the opener are required to ensure safe operation.

■ The model number label is located under the light lens on the left side panel

of your opener.

Introduction 2-5

Safety symbol and signal word review . . . . . . . . . . . . . . . 2

Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . 3

Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Carton inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Hardware inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Assembly 6

Fasten rail to the motor unit . . . . . . . . . . . . . . . . . . . . . . . 6

Installation 7-22

Installation safety instructions . . . . . . . . . . . . . . . . . . . . . 7

Determine the header bracket location . . . . . . . . . . . . . . 8

Install the header bracket. . . . . . . . . . . . . . . . . . . . . . . . . 9

Attach the rail to the header bracket . . . . . . . . . . . . . . . 10

Install the Protector System

Position the opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Hang the opener. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Install the Smart Control Panel

Install the Standby Power (Optional) . . . . . . . . . . . . . . . 17

Install the lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Attach the emergency release rope and handle . . . . . . 17

Electrical requirements. . . . . . . . . . . . . . . . . . . . . . . . . . 18

Complete safety reversing sensor installation . . . . . . . . 18

Fasten the door bracket . . . . . . . . . . . . . . . . . . . . . . . . . 19

Connect the door arm to the trolley . . . . . . . . . . . . . 21-22

. . . . . . . . . . . . . . . . . . 11-13

. . . . . . . . . . . . . . . . . . . 16

Adjustment 23-25

Program the travel limits . . . . . . . . . . . . . . . . . . . . . . . . 23

Set the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Test the safety reversal system . . . . . . . . . . . . . . . . . . . 25

Test the Protector System

. . . . . . . . . . . . . . . . . . . . . . 25

Operation 26-33

Operation safety instructions . . . . . . . . . . . . . . . . . . . . . 26

Using your garage door opener . . . . . . . . . . . . . . . . . . . 26

Using the Smart Control Panel

Using the remote control . . . . . . . . . . . . . . . . . . . . . . . . 28

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

To open the door manually . . . . . . . . . . . . . . . . . . . . . . 28

Care of your garage door opener. . . . . . . . . . . . . . . . . . 28

Using the remote control . . . . . . . . . . . . . . . . . . . . . . . . 29

The remote control battery . . . . . . . . . . . . . . . . . . . . . . . 29

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Standby Power (Optional) . . . . . . . . . . . . . . . . . . . . . . .30

Having a problem? . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Diagnostic chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-33

. . . . . . . . . . . . . . . . . . . 27

Programming 34-35

To add or reprogram a hand-held remote control . . . . . 34

To erase all codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3-Button remotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

To add, reprogram or change

a Keyless Entry PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Repair Parts 36-37

Rail assembly parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Installation parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Motor unit assembly parts . . . . . . . . . . . . . . . . . . . . . . . 37

Accessories 38

Notes 39

Repair Parts and Service 40

Warranty 40

INTRODUCTION

Safety Symbol and Signal Word Review

This garage door opener has been designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the instructions and warnings contained in this manual.

When you see these Safety Symbols and Signal Words on the following pages, they will alert you to the possibility of

Mechanical

Electrical

serious injury or death if you do not comply with the warnings that accompany them. The hazard may come from something mechanical or from electric shock. Read the warnings carefully.

When you see this Signal Word on the following pages, it will alert you to the possibility of damage to your garage door and/or the garage door opener if you do not comply with the cautionary statements that accompany it. Read them carefully.

Preparing your garage door

Before you begin:

• Disable 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 should stay in place, supported entirely by its springs.

2. Raise and lower the door to see if there is any binding or sticking.

If your door binds, sticks, or is out of balance, call a trained door systems technician.

To prevent possible SERIOUS INJURY or DEATH:

• ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An unbalanced garage door may not reverse when required.

• NEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of which are under EXTREME tension.

• Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to avoid entanglement.

To prevent damage to garage door and opener:

• ALWAYS disable locks BEFORE installing and operating the opener.

• ONLY operate garage door opener at 120V, 60 Hz to avoid malfunction and damage.

Sectional Door

One-Piece Door

Carpenter's Level (Optional)

Drill

Tape Measure

3/16", 5/16" and 5/32" Drill Bits

Tools needed

During assembly, installation and adjustment of the opener, instructions will call for hand tools as illustrated below.

Pencil

Hack Saw

Wire Cutters

Claw Hammer

Pliers

Stepladder

1/2" and 3/8" Sockets and Wrench

Screwdriver

Adjustable End Wrench

Safety Reversing Sensor

Access Door

Gap between floor and bottom of door must not exceed 1/4" (6 mm).

Header Wall

Planning

Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply to your installation. Additional materials may be required. You may find it helpful to refer back to this page and the accompanying illustrations as you proceed with the installation of your opener.

SECTIONAL DOOR INSTALLATION

Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.). See page 19 for details.

Header Wall

Vertical Centerline of Garage Door

Safety Reversing Sensor

— — — — — — — —

Gap between floor and bottom of door must not exceed 1/4" (6 mm).

FINISHED CEILING

Rail

Torsion Spring

Wallmounted Door Control

Safety Reversing Sensor

Extension Spring

Access Door

Support bracket & fastening hardware is required. See page 15.

Motor Unit

ONE-PIECE DOOR WITHOUT TRACK

Header Wall

Gap between floor

Safety Reversing Sensor

and bottom of door must not exceed 1/4" (6 mm).

FINISHED CEILING

Rail

Access Door

Safety Reversing Sensor

Support bracket & fastening hardware is required. See page 19.

Wall-mounted Door Control

15.

Motor Unit

ONE-PIECE DOOR WITH TRACK

Straight Door Arm Section

Curved Door Arm Section

Safety Labels

and

Literature

Header Bracket

CEILING MOUNT ONLY

2 Conductor Bell Wire White & White/Red

Remote Control Visor Clip

Door Bracket

The Protector System

(2) Safety Reversing Sensors (1 Sending Eye and 1 Receiving Eye) with 2-Conductor White & White/Black Bell Wire attached

Safety Sensor Bracket (2)

Sprocket Coupling

Trolley

Rail

Motor Unit with 2 Light Lenses

Battery

(Optional)

SECURITY✚

3-Button Remote Control

LOCK

LIGHT

Carton Inventory

Your garage door opener is packaged in two cartons which contain the motor unit and all parts illustrated below. Accessories will depend on the model purchased. If

Smart Control Panel

anything is missing, carefully check the packing material. Parts may be stuck in the foam. Hardware for installation is also listed below.

RAIL ASSEMBLY

Coupling Sleeve (1) Hex Bolt 1/4"-20 x 5/8" (4) Nut 1/4" - 20 (4)

INSTALLATION HARDWARE

Hex Bolt 5/16"-18x7/8" (4) Lag Screw 5/16"-9x1-5/8" (2) Lag Screw 5/16"-18x1-7/8" (2) Clevis Pin 5/16"x2-3/4" (1) Clevis Pin 5/16"x1-1/4" (1) Clevis Pin 5/16"x1" (1) Nut 5/16"-18 (4)

Lock Washer 5/16" (4) Screw 6-32x1" (2) Self-Threading Screw 1/4"-14x5/8" (2) Insulated Staples (10) Ring Fastener (3) Drywall Anchors (2) Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Spacers (2) Rope Handle

ASSEMBLY STEP 1

Hex Bolt 1/4"-20x7/16"

Fasten the Rail to the Motor Unit

To avoid installation difficulties, do not run the garage door opener until instructed to do so.

To aid in assembly and installation, replace the foam packing around the motor unit. Remove it after Installation Step 5.

• Working on a level surface, align the rail assembly with the motor unit, as shown.

• Slip the coupling over the rail sprocket.

• Slide the rail through the motor unit bracket until the coupling fits securely over the motor unit sprocket.

• Align the two bolt holes in the rail with those in the motor unit bracket. Insert four 1/4"-20x7/16" hex bolts. Tighten securely with a 3/8" socket wrench.

• Turn release arm down to disengage trolley.

• Slide the trolley onto and along the bottom of the rail. Align trolley with rack and turn release arm up to re-engage trolley. Be certain to install it facing

correctly: the trolley release arm must be horizontal (lock position), with its arrow pointed away from the motor unit.

HARDWARE SHOWN ACTUAL SIZE

Rail Assembly

Rail Sprocket

Hex Bolts 1/4-20x7/16"

Coupling

Motor Unit Bracket

Motor Unit Sprocket

Hex Bolts 1/4"-20x7/16"

Foam Packaging

Release arm

Rack

Trolley

To motor unit

INSTALLATION

WARNING

WARNING WARNING

IMPORTANT INSTALLATION INSTRUCTIONS

To reduce the risk of SEVERE INJURY or DEATH:

1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS.

2. Install garage door opener ONLY on properly balanced and lubricated garage door. An improperly balanced door may not reverse when required and could result in SEVERE INJURY or DEATH.

3. ALL repairs to cables, spring assemblies and other hardware MUST be made by a trained door systems technician BEFORE installing opener.

4. Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to avoid entanglement.

5. Install garage door opener 7 feet (2.13 m) or more above floor.

6. Mount emergency release handle 6 feet (1.83 m) above floor.

7. NEVER connect garage door opener to power source until instructed to do so.

8. NEVER wear watches, rings or loose clothing while installing or servicing opener. They could be caught in garage door or opener mechanisms.

9. Install wall-mounted garage door control:

• within sight of the garage door.

• out of reach of children at minimum height of 5 feet

(1.5 m).

• away from ALL moving parts of the door.

10. Place entrapment warning label on wall next to garage door control.

11. Place manual release/safety reverse test label in plain view on inside of garage door.

12. Upon completion of installation, test safety reversal system. Door MUST reverse on contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor.

13. To avoid SERIOUS PERSONAL INJURY or DEATH from

electrocution, disconnect ALL electric and battery power BEFORE performing ANY service or maintenance.

INSTALLATION STEP 1

Header Wall

Sectional door with curved track

Highest Point of Travel

Door

Track

3" (7.5 cm)

One-piece door with horizontal track

Door

Track

Header Wall

Highest Point of Travel

3" (7.5 cm)

Header Wall

Vertical Centerline of Garage Door

Level (optional)

2x4

Structural Supports

OPTIONAL CEILING MOUNT FOR HEADER BRACKET

Unfinished Ceiling

Door

Jamb Hardware

One-piece door without track: jamb hardware

8" (20 cm)

Highest Point of Travel

Door

Pivot

8" (20 cm)

One-piece door without track: pivot hardware

Highest Point of Travel

Header Wall

Determine the Header Bracket Location

To prevent possible SERIOUS INJURY or DEATH:

• Header bracket MUST be RIGIDLY fastened to structural support on header wall or ceiling, otherwise garage door might not reverse when required. DO NOT install header bracket over drywall.

• Concrete anchors MUST be used if mounting header bracket or 2x4 into masonry.

• NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which are under EXTREME tension.

• ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An unbalanced garage door might not reverse when required.

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.

You can fasten the header bracket within 4 feet

(1.22 m) of the left or right of the door center only if a torsion spring or center bearing plate is in the way; or you can attach it to the ceiling (see page 9) when clearance is minimal. (It may be mounted on the wall upside down if necessary, to gain approximately 1/2" (1 cm).)

If you need to install the header bracket on a 2x4

(on wall or ceiling), use lag screws (not provided) to securely fasten the 2x4 to structural supports as shown here and on page 9.

3. Open your door to the highest point of travel as shown. Draw an inter secting horizontal line on the header wall above the high point:

• 3" (7.5 cm) above the high point for sectional door

and one-piece door with track.

• 8" (20 cm) above the high point for one-piece door

without track.

This height will provide travel clearance for the top edge

of the door.

NOTE: If the total number of inches exceeds the height

available in your garage, use the maximum height possible, or refer to page 9 for ceiling installation.

INSTALLATION STEP 2

CEILING MOUNT ONLY

Ceiling Mounting Holes

The nail hole is for positioning only. You must use lag screws to mount the header bracket.

Lag Screws 5/16"-9x1-5/8"

Garage Door

Header Wall

– Finished Ceiling –

Header Bracket

6" (15 cm)

Maximum

Door Spring

Vertical Centerline of Garage Door

Install the Header Bracket

You 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).

WALL HEADER BRACKET INSTALLATION

• Center the bracket on the vertical centerline with the bottom edge of the bracket on the horizontal line as shown (with the arrow pointing toward the ceiling).

• Mark the vertical set of bracket holes (do not use the holes designated for ceiling mount). Drill 3/16" pilot holes and fasten the bracket securely to a structural support with the hardware provided.

HARDWARE SHOWN ACTUAL SIZE

Lag Screw 5/16"-9 x 1-5/8"

2x4 Structural Support

Horizontal Line

Highest Point of Garage Door Travel

Wall Mounting Holes

CEILING MOUNT ONLY

Optional Wall Mounting Holes

Header Wall

Header Bracket

The nail hole is for positioning only. You must use lag screws to mount the header bracket.

CEILING MOUNT ONL

Door Spring

Garage Door

Vertical Centerline of Garage Door

Lag Screws 5/16"-9x1-5/8"

CEILING HEADER BRACKET INSTALLATION

• Extend the vertical centerline onto the ceiling as shown.

• Center the bracket on the vertical mark, no more than 6" (15 cm) from the wall. Make sure the arrow is pointing toward the wall. The bracket can be mounted flush against the ceiling when clearance is minimal.

• Mark the side holes. Drill 3/16" pilot holes and fasten bracket securely to a structural support with the hardware provided.

Header Bracket

Rail Bracket

Opener Carton or

Temporary

Support

Header Wall

Garage Door

Rail

Clevis Pin 5/16"x2-3/4"

Ring Fastener

Header Bracket

Spacers

Rail Bracket

Rail

INSTALLATION STEP 3

Attach the Rail to the Header Bracket

NOTE: (Optional) With some existing installations, you may re-use the old header bracket with the two plastic spacers included in the hardware bag. Place the spacers inside the bracket on each side of the rail, as illustrated.

• 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 allow the rail to clear the spring.

• Position the rail bracket against the header bracket.

• Align the bracket holes and join with a clevis pin as shown.

• Insert a ring fastener to secure.

Clevis Pin 5/16"x2-3/4"

HARDWARE SHOWN ACTUAL SIZE

Ring Fastener

Spacer

INSTALLATION STEP 4

Invisible Light Beam Protection Area

Safety Reversing Sensor 6" (15 cm) max. above floor

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.

IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR

When properly connected and aligned, the sensor will detect an obstacle in the path of its electronic beam. The sending eye (with an amber indicator light) transmits an invisible light beam to the receiving eye (with a green indicator light). If an obstruction breaks the light beam while the door is closing, the door will stop and reverse to full open position, and the opener lights will flash 10 times.

The units must be installed inside the garage so that the sending and receiving eyes face each other across the door, no more than 6" (15 cm) above the floor. Either can be installed on the left or right of the door as long as the sun never shines directly into the receiving eye lens.

The mounting brackets are designed to clip onto the track of sectional garage doors without additional hardware.

Be sure power is not connected to the garage door opener BEFORE installing the safety reversing sensor.

To prevent SERIOUS INJURY or DEATH from a closing garage door:

• Correctly connect and align the safety reversing sensor. This required safety device MUST NOT be disabled.

• Install the safety reversing sensor so beam is NO HIGHER than 6" (15 cm) above garage floor.

If it is necessary to mount the units on the wall, the brackets must be securely fastened to a solid surface such as the wall framing. Extension brackets (see accessories) are available if needed. If installing in masonry construction, add a piece of wood at each location to avoid drilling extra holes in masonry if repositioning is necessary.

The invisible light beam path must be unobstructed. No part of the garage door (or door tracks, springs, hinges, rollers or other hardware) may interrupt the beam while the door is closing.

Facing the door from inside the garage

DOOR TRACK MOUNT (RIGHT SIDE)

Indicator Light

Lens

Lip

Safety Reversing Sensor Bracket

Door Track

FLOOR MOUNT (RIGHT SIDE)

WALL MOUNT (RIGHT SIDE)

Indicator Light

Safety Reversing Sensor Bracket

Lens

Extension Bracket (See Accessories)

Inside Garage Wall

(Provided with Extension Bracket)

Figure 1

Figure 2

Figure 3

Figure 4

WALL MOUNT (RIGHT SIDE)

Attach with Concrete Anchors (Not Provided)

Inside Garage

Wall

Safety Reversing Sensor Bracket

Lens

Indicator Light

Inside Garage Wall

Indicator Light

Safety Reversing Sensor Bracket

Lens

Lag Screws (Not Provided)

Fasten Wood Block to Wall with Lag Screws (Not Provided)

INSTALLING THE BRACKETS Be sure power to the opener is disconnected. Install

and align the brackets so the sensors will face each other across the garage door, with the beam no higher than 6" (15 cm) above the floor. They may be installed in one of three ways, as follows:

Garage door track installation (preferred):

• Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. Snap into place against the side of the track. It should lie flush, with the lip hugging the back edge of the track, as shown in Figure 1.

If your door track will not support the bracket securely, wall installation is recommended.

Wall installation (Figures 2 & 3):

• Place the bracket against the wall with curved arms facing the door. Be sure there is enough clearance for the sensor beam to be unobstructed.

• If additional depth is needed, an extension bracket (see Accessories) or wood blocks can be used.

• Use bracket mounting holes as a template to locate and drill (2) 3/16" diameter pilot holes on the wall at each side of the door, no higher than 6" (15 cm) above the floor.

• Attach brackets to wall with lag screws (not provided).

• If using extension brackets or wood blocks, adjust right and left assemblies to the same distance out from the mounting surface. Make sure all door hardware obstructions are cleared.

Floor installation (Figure 4):

• Use wood blocks or extension brackets (see Accessories) to elevate sensor brackets so the lenses will be no higher than 6" (15 cm) above the floor.

• Carefully measure and place right and left assemblies at the same distance out from the wall. Be sure all door hardware obstructions are cleared.

• Fasten to the floor with concrete anchors as shown.

+ 28 hidden pages

Chamberlain 3840 User Manual

Owner’s Manual

TABLE OF CONTENTS

INTRODUCTION

Safety Symbol and Signal Word Review

Preparing your garage door

Tools needed

Planning

Carton Inventory

Fasten the Rail to the Motor Unit

INSTALLATION

Determine the Header Bracket Location

Install the Header Bracket

Attach the Rail to the Header Bracket