Chamberlain Chain Drive Garage Door Opener Installation Manual

Contents

• Preparation
• Assembly
• Installation
• Install the Door Control
• Install the Protector System^®
• Connect Power
• Adjustments
• myQ^® App Control
• Operation
• Maintenance
• Troubleshooting
• Warranty
• Automatic Garage Door Opener Safety & Maintenance Guide
• Repair Parts

Safety Symbol and Signal Word Review

WARNING: Alerts to the possibility of serious injury or death from mechanical or electrical hazards.

CAUTION: Alerts to the possibility of damage to the garage door and/or opener.

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Unattended Operation

Features like Timer-to-Close (TTC), the myQ^® App, and myQ^® Garage Door and Gate Monitor are considered unattended close and are to be used ONLY with sectional doors. Any device or feature that allows the door to close without being in the line of sight of the door is considered unattended close.

Preparation

Check the Door

WARNING: To prevent possible SERIOUS INJURY or DEATH:

• ALWAYS call a trained door systems technician if the 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 springs, cables, pulleys, brackets, or their hardware, as these are under EXTREME tension.
• Disable ALL locks and remove ALL ropes connected to the garage door BEFORE installation and operation to avoid entanglement.
• DO NOT install on a one-piece door if using devices or features providing unattended close.

CAUTION: To prevent damage to the garage door and opener:

• ALWAYS disable locks BEFORE installing and operating the opener.
• ONLY operate the garage door opener at 120V, 60 Hz to avoid malfunction and damage.

Before you begin:

1. Disable locks and remove any ropes connected to the garage door.
2. Lift the door halfway up and release it. If balanced, it should stay in place.
3. Raise and lower the door to check for binding or sticking. Call a technician if issues are found.
4. Check the seal on the bottom of the door. Any gap must not exceed 1/4" (6 mm) for proper safety reversal system function.
5. The opener should be installed above the center of the door. If obstructed, it may be installed within 4 feet (1.2 m) to the left or right of the door center.

Check Signal Strength for Smartphone Connectivity

To monitor and control your garage door from anywhere using the myQ^® App, you will need a router with Wi-Fi^® and a smartphone. Ensure your mobile device is connected to your Wi-Fi^® network. Hold your mobile device where the opener will be installed to check the Wi-Fi^® signal strength.

• Strong Wi-Fi signal: Proceed with installation.
• Weak Wi-Fi signal: The opener may still connect. If not, consider moving your router closer or using a Wi-Fi range extender.
• No Wi-Fi signal: Move your router closer or use a Wi-Fi range extender.

*Visit support.chamberlaingroup.com for more details.*

*Smartphone control is not available on models C2102 and D2101.*

Tools Needed

Tools typically required include: ladder, hammer, pencil, tape measure, pliers, level, screwdrivers (Phillips and flathead), drill with various bits (5/32", 3/16", 5/16"), hacksaw, clamps, adjustable wrench, and socket wrench with various sockets (1/4", 7/16", 9/16", 1/2").

Additional Items You May Need:

• 2x4 Pieces of wood: For fastening header brackets, positioning the opener, and testing safety sensors.
• Support bracket and fastening hardware: For finished ceilings.
• Hanging brackets
• Extension brackets (Model 041A5281-1) or wood blocks: For safety reversing sensor installation.
• Fastening hardware: For alternate floor mounting of safety reversing sensors.
• Door reinforcement: Required for light steel, aluminum, fiberglass, or glass panel doors.
• Rail extension kit: Required for garage doors over 7 feet (2.13 m) high.

Carton Inventory

Save the carton and packing material until installation is complete. Instructions for accessories are provided with the accessories.

Key Components:

• Header bracket
• Pulley
• Door bracket
• Curved door arm
• Straight door arm
• Trolley
• Emergency release rope and handle
• Rail sections
• Garage door opener (motor unit)
• Chain spreader
• "U" bracket
• Chain and cable or chain
• The Protector System^® (Safety reversing sensors)
• Remote control
• Door Control (Push Button or Multi-Function Control Panel)
• Wiring
• Installation manual and warning labels
• Sprocket cover

For replacement or additional accessories, visit chamberlain.com for models like the 3-button remote control model 953EV-P2 and wireless keypad model 940EV-P2.

Hardware

The manual details various hardware components including bolts, nuts, lock nuts, clevis pins, ring fasteners, lag screws, self-threading screws, hex screws, wing nuts, and drywall anchors, specific to different door types and installation methods.

Assembly

STEP 1: Assemble the Rail and Install the Trolley

CAUTION: Keep hands and fingers away from joints during rail assembly to prevent pinching.

1. Remove the straight door arm and hanging bracket from the front rail section.
2. Align and slide rail sections together, ensuring tabs lock into place.
3. Place the motor unit on protective material and rest the back end of the rail on top. Support the front end of the rail.
4. Insert a screwdriver into the second rail section from the motor unit as a temporary stop.
5. Ensure 4 plastic wear pads are inside the inner trolley.
6. Slide the trolley assembly toward the screwdriver.
7. Slide the rail onto the "U" bracket until it reaches the stops.

STEP 2: Fasten the Rail to the Motor Unit (Model C2405)

CAUTION: Use ONLY bolts/fasteners mounted in the top of the opener to avoid damage.

1. Insert a 1/4"-20 x 1-3/4" bolt into the cover protection bolt hole on the back end of the rail and tighten securely with a 1/4"-20 lock nut.
2. Remove bolts from the top of the motor unit.
3. Support the front end of the rail with the carton.
4. Place the "U" bracket flat side down onto the motor unit, aligning holes.
5. Fasten the "U" bracket with the removed bolts. DO NOT use power tools.
6. Attach the chain spreader to the motor unit with two screws.

STEP 3: Install the Idler Pulley

1. Lay the chain/cable beside the rail and pass approximately 12" (30 cm) of cable through the window.
2. Ensure the idler pulley is greased.
3. Place the idler pulley into the window.
4. Insert the idler bolt from the top through the rail and pulley. Tighten with a 3/8" lock washer and nut underneath the rail.
5. Rotate the pulley to ensure it spins freely.
6. Lift the rail tab near the idler pulley until it is vertical (90°).

STEP 4: Install the Chain

1. Pull the cable around the idler pulley and toward the trolley.
2. Connect the cable to the retaining slot on the trolley using the master link (pins, cap, clip-on spring).
3. With the trolley against the screwdriver, dispense the remainder of the cable/chain along the rail around the sprocket and to the trolley assembly. Ensure sprocket teeth engage the chain.
4. Check that the chain is not twisted, then connect it to the threaded shaft with the remaining master link.
5. Thread the inner nut and lock washer onto the trolley threaded shaft.
6. Insert the trolley threaded shaft through the hole in the trolley, ensuring the chain is not twisted.
7. Loosely thread the outer nut onto the trolley threaded shaft.
8. Remove the screwdriver.

STEP 5: Tighten the Chain

1. Spin the inner nut and lock washer down the trolley threaded shaft.
2. Turn the outer nut to tighten the chain.
3. When the chain is approximately 1/4" (6 mm) above the base of the rail at its midpoint, retighten the inner nut to secure the adjustment.

Note: Some chain droop when the door is closed is normal. During future maintenance, pull the emergency release handle to disconnect the trolley before adjusting the chain.

IMPORTANT INSTALLATION INSTRUCTIONS

WARNING: To reduce the risk of SEVERE INJURY or DEATH:

1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS.
2. Install ONLY on a properly balanced and lubricated garage door.
3. ALL repairs to cables, spring assemblies, and other hardware MUST be made by a trained door systems technician BEFORE installing the opener.
4. Disable ALL locks and remove ALL ropes connected to the garage door BEFORE installing the opener to avoid entanglement.
5. Where possible, install the door opener 7 feet (2.13 m) or more above the floor.
6. Mount the emergency release within reach, but at least 6 feet (1.83 m) above the floor and avoiding contact with vehicles.
7. NEVER connect the garage door opener to the power source until instructed.
8. NEVER wear watches, rings, or loose clothing while installing or servicing the opener.
9. Install the wall-mounted garage door control: within sight of the garage door, out of reach of small children (minimum height of 5 feet / 1.5 m), and away from ALL moving parts of the door.
10. Place entrapment warning label on the wall next to the garage door control.
11. Place emergency release/safety reverse test label in plain view on the inside of the garage door.
12. Upon completion, test the safety reversal system. The door MUST reverse on contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor.
13. DO NOT install on a one-piece door if using unattended close features.

SAVE THESE INSTRUCTIONS.

Installation

STEP 1: Determine the Header Bracket Location

WARNING: Header bracket MUST be RIGIDLY fastened to structural support. DO NOT install over drywall. Use concrete anchors for masonry. NEVER attempt to adjust door springs or hardware as they are under EXTREME tension. Call a technician for binding or unbalanced doors.

1. Close the door and mark the inside vertical centerline. Extend the line onto the header wall.
2. The header bracket can be fastened within 4 feet (1.22 m) of the center if obstructed by a torsion spring or center bearing plate, or attached to the ceiling. If mounting to a 2x4, securely fasten the 2x4 to structural supports first.
3. Open the door to its highest point of travel. Draw a horizontal line on the header wall 2" (5 cm) above the high point for sectional doors or one-piece doors with tracks. For one-piece doors without tracks, measure 8" (20 cm) above the high point. This provides clearance for the top edge of the door. If clearance is limited, use the maximum possible height or refer to ceiling installation instructions.

STEP 2: Install the Header Bracket

You can attach the header bracket to the wall above the door or to the ceiling. Do not install over drywall. Use concrete anchors if installing into masonry.

• OPTION A - WALL INSTALLATION: Center the bracket on the vertical centerline with the bottom edge on the horizontal line (arrow pointing toward the ceiling). Mark holes, drill 3/16" pilot holes, and fasten securely to a structural support.
• OPTION B - CEILING INSTALLATION: Extend the vertical centerline onto the ceiling. Center the bracket on the mark, no more than 6" (15 cm) from the wall, with the arrow pointing away from the wall. Mark holes, drill 3/16" pilot holes, and fasten securely to a structural support.

STEP 3: Attach the Rail to the Header Bracket

1. Position the opener on the garage floor below the header bracket, using packing material as a base.
2. Position the rail bracket against the header bracket.
3. Align the bracket holes and join with a clevis pin. Secure with a ring fastener.

STEP 4: Position the Garage Door Opener

CAUTION: Rest the opener rail on a 2x4 placed on the top section of the door to prevent damage.

1. Remove packing material and lift the garage door opener onto a ladder.
2. Fully open the door and place a 2x4 (laid flat) under the rail. For one-piece doors without tracks, place the 2x4 on its side.
3. If the door hits the trolley when raised, pull the trolley release arm down to disconnect the inner and outer trolley and slide the outer trolley toward the opener.

STEP 5: Hang the Garage Door Opener

WARNING: Fasten the opener SECURELY to structural supports to avoid SERIOUS INJURY from a falling opener. Use concrete anchors for masonry.

• For finished ceilings, attach a support bracket (not provided) to structural supports using lag screws before installing the opener.
• Ensure the opener is aligned with the header bracket. Measure distances from the opener sides to the support bracket.
• Cut hanging brackets (not provided) to length.
• Attach hanging brackets to the support bracket with appropriate hardware (not provided).
• Attach the opener to the hanging brackets using hex bolts, lock washers, and nuts.
• Remove the 2x4 and manually close the door. If the door hits the rail, raise the header bracket.

STEP 6: Install the Light Bulbs

CAUTION: Use ONLY A19 light bulbs. DO NOT use incandescent bulbs larger than 100W, compact fluorescent bulbs larger than 26W (100W equivalent), or halogen bulbs. LED bulbs may cause interference; use only recommended LED bulbs from chamberlain.com/bulb.

1. Pull the light lens down.
2. Insert the light bulb.
3. Close the light lens.

STEP 7: Attach the Emergency Release Rope and Handle

WARNING: To prevent SERIOUS INJURY or DEATH from a falling garage door:

• Use the emergency release handle to disengage the trolley ONLY when the garage door is CLOSED.
• NEVER use the emergency release handle unless the doorway is clear of persons and obstructions.
• NEVER use the handle to pull the door open or closed.

1. Insert one end of the rope through the handle and secure with an overhand knot.
2. Insert the other end through the hole in the trolley release arm. Mount the release within reach, at least 6 feet (1.83 m) above the floor, avoiding contact with vehicles. Secure with an overhand knot.

Note: Seal cut rope ends to prevent unraveling. Ensure the release rope and handle are above vehicles.

STEP 8: Install the Door Bracket

CAUTION: Fiberglass, aluminum, or lightweight steel doors REQUIRE reinforcement BEFORE installing the door bracket. Contact the door manufacturer for instructions or a reinforcement kit. Failure to reinforce may void the door warranty.

• OPTION A - SECTIONAL DOORS: Center the door bracket on the vertical centerline, 2"-4" (5-10 cm) below the top edge of the door or directly below structural support. Secure using appropriate hardware (self-threading screws or bolts/washers/nuts) based on door construction (metal, insulated, wood).
• OPTION B - ONE-PIECE DOORS: Center the door bracket on the top of the door, in line with the header bracket. Mark and drill holes. Secure with self-threading screws for metal doors or bolts/washers/nuts or lag screws for wood doors. The bracket may be installed on the top edge if needed.

STEP 9: Connect the Door Arm to the Trolley

• OPTION A - SECTIONAL DOORS: Close the door. Disconnect the trolley using the emergency release handle. Attach the straight door arm to the outer trolley and the curved door arm to the door bracket using clevis pins and ring fasteners. Join the arm sections with bolts, nuts, and lock washers. Re-engage the trolley by pulling the release handle toward the opener until it is horizontal.
• OPTION B - ONE-PIECE DOORS: Close the door. Disconnect the trolley. Fasten the straight and curved door arms together to the longest possible length. Attach the straight door arm to the door bracket and the curved door arm to the trolley using clevis pins and ring fasteners. Re-engage the trolley.

STEP 10: Install the Door Control

WARNING: Ensure power is OFF before installing. Connect ONLY to 12 VOLT low voltage wires. Install the door control within sight of the door, out of reach of children (min. 5 feet / 1.5 m), and away from moving parts.

• PUSH BUTTON DOOR CONTROL: Strip 1/4" (6 mm) of insulation from wires and connect to the two screws on the back of the control. Mount using provided hardware (screws and drywall anchors).
• MULTI-FUNCTION CONTROL PANEL: Strip 7/16" (11 mm) of insulation from wires and connect to the two screws on the back of the control. Mount using provided hardware. For gang box installations, use existing holes. If pre-wired, connect to the appropriate wires.

STEP 11: Wire the Door Control to the Garage Door Opener

1. Run the wire from the door control to the opener. Attach with staples, avoiding piercing the wire.
2. Strip 7/16" (11 mm) of insulation from the wire ends near the opener.
3. Connect the wires to the red and white terminals on the opener. If pre-wired, use the same wires connected to the door control. Push terminal tabs with a screwdriver to insert or release wires.

STEP 12: Attach the Warning Labels

• Attach the entrapment warning label on the wall near the door control.
• Attach the manual release/safety reverse test label in a visible location on the inside of the garage door.

STEP 13: Install the Protector System^®

WARNING: Ensure power is OFF. Correctly connect and align the safety reversing sensors. The beam MUST be NO HIGHER than 6" (15 cm) above the garage floor.

The Protector System^® uses a light beam to prevent the door from closing on obstructions. The sending sensor has an amber LED, and the receiving sensor has a green LED.

• Ensure sensors are inside the garage, lenses face each other, and the beam is unobstructed and no higher than 6" (15 cm) from the floor. Avoid direct sunlight on the receiving sensor.
• DOOR TRACK INSTALLATION: Slide sensor brackets onto the door track, secure sensors with hex screws and wing nuts.
• WALL OPTION: Attach sensor brackets to the wall with lag screws. Secure sensors with hex screws and wing nuts. Use extension brackets or wood blocks if more clearance is needed.
• FLOOR OPTION: Attach brackets to the floor with concrete anchors. Secure sensors with hex screws and wing nuts. Ensure brackets are equidistant from the wall and unobstructed.

STEP 14: Wire the Safety Reversing Sensors

• OPTION A - INSTALLATION WITH NO PRE-WIRING: Run wires from both sensors to the opener. Attach with staples. Separate wires, twist the two white wires together and the two white/black wires together. Insert white wires into the white terminal and white/black wires into the grey terminal on the opener.
• OPTION A - PRE-WIRED INSTALLATION: Cut sensor wires to reach pre-installed wires. Strip insulation. Connect sensor wires to pre-installed wires using wire nuts, matching colors. At the opener, strip wire ends, twist like-colored wires together, and connect to the appropriate terminals (white to white, white/black to grey).

STEP 15: Connect Power

WARNING: Ensure power is OFF before connecting. Follow local electrical codes. NEVER use an extension cord or alter the plug. The opener MUST be grounded.

• OPTION A - TYPICAL WIRING: Plug the opener into a grounded outlet.
• OPTION B - PERMANENT WIRING: If required by code, remove the motor unit cover, disconnect the 3-prong cord, and connect the black (line), white (neutral), and ground wires to the appropriate terminals and ground screw. Reinstall the cover.

STEP 16: Align the Safety Reversing Sensors

Both sensor LEDs should glow steadily when aligned and powered correctly.

• Loosen the wing nuts.
• Adjust sensors up or down until both LEDs glow steadily.
• Tighten the wing nuts to secure the sensors.

SAFETY SENSOR TROUBLESHOOTING:

• LEDs off: Check opener power, sensor wire integrity, and correct wiring (white to white, white/black to grey terminals).
• Green LED blinking: Sensors are obstructed or misaligned. Check for obstructions, align sensors, or swap sensors if direct sunlight affects the receiving sensor.

STEP 17: Ensure the Door Control is Wired Correctly

If wired correctly, the command LED on the control panel or the LED behind the push button will blink.