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® GARAGE DOOR OPENER Models 3245 1/3 HP 3255 1/2 HP 3255-2 1/2 HP 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! ■ Fasten the manual near the garage door after installation. ■ The door WILL NOT...
® GARAGE DOOR OPENER Models 3245 1/3 HP 3255 1/2 HP 3255-2 1/2 HP 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! ■ Fasten the manual near the garage door after installation. ■ The door WILL NOT...
3255 Manual
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... Mechanical Electrical When you see this Signal Word on the following pages, it will alert you to the possibility of damage to your garage door opener 28 Having a problem 29 Diagnostic chart 30 Programming 31-32 To add or reprogram a hand-held remote control 31 To erase all...33 Motor unit assembly parts 34 Accessories 35 Repair Parts and Service 36 Warranty 36 INTRODUCTION Safety Symbol and Signal Word Review This garage door opener has been designed and tested to the possibility of serious injury or death if you do not comply with the warnings that accompany...
... Mechanical Electrical When you see this Signal Word on the following pages, it will alert you to the possibility of damage to your garage door opener 28 Having a problem 29 Diagnostic chart 30 Programming 31-32 To add or reprogram a hand-held remote control 31 To erase all...33 Motor unit assembly parts 34 Accessories 35 Repair Parts and Service 36 Warranty 36 INTRODUCTION Safety Symbol and Signal Word Review This garage door opener has been designed and tested to the possibility of serious injury or death if you do not comply with the warnings that accompany...
3255 Manual
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...and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to make sure your garage door is balanced and is out of the opener, instructions will call for hand tools as shown. 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 loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware...
...and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to make sure your garage door is balanced and is out of the opener, instructions will call for hand tools as shown. 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 loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware...
3255 Manual
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... panels, etc.). Additional materials may find it helpful to refer back to your garage door. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of your opener. Motor Unit Vertical Centerline of Safety door must not exceed 1/4" (6 mm). ...Planning Identify the type and height of your installation. Slack in chain tension is normal when garage door is needed for details. ONE-PIECE DOOR...
... panels, etc.). Additional materials may find it helpful to refer back to your garage door. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of your opener. Motor Unit Vertical Centerline of Safety door must not exceed 1/4" (6 mm). ...Planning Identify the type and height of your installation. Slack in chain tension is normal when garage door is needed for details. ONE-PIECE DOOR...
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...Light Lens CEILING MOUNT ONLY UP Header Bracket 2 Conductor Bell Wire White & White/Red? contain the motor unit and all parts illustrated below . 3245 (1), 3255 (1), 3255-2 (2) LOCK LIGHT Multi-Function Door Control Panel : SECURITY ® Single-Button Remote Control Remote Control Visor Clip Chain Sprocket Cover Styrofoam Motor Unit with ...(2) Insulated Staples (30) Ring Fastener (3) Drywall Anchors (2) Rail Grease Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Rope Handle 5 Straight Door Arm Section Carton Inventory Your garage door opener is packaged in the foam.
...Light Lens CEILING MOUNT ONLY UP Header Bracket 2 Conductor Bell Wire White & White/Red? contain the motor unit and all parts illustrated below . 3245 (1), 3255 (1), 3255-2 (2) LOCK LIGHT Multi-Function Door Control Panel : SECURITY ® Single-Button Remote Control Remote Control Visor Clip Chain Sprocket Cover Styrofoam Motor Unit with ...(2) Insulated Staples (30) Ring Fastener (3) Drywall Anchors (2) Rail Grease Carriage Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Rope Handle 5 Straight Door Arm Section Carton Inventory Your garage door opener is packaged in the foam.
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...damage to the Sprocket and Install the Sprocket Cover • Position chain over sprocket. Cut tape from moving garage door opener: • ALWAYS keep hand clear of sprocket while operating opener. • Securely attach sprocket cover BEFORE operating. USE ONLY THIS TYPE AND SIZE BOLT Rail Hole Washered Bolt... the washered bolts part way in. ASSEMBLY STEP 1 Attach the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted in top of motor unit. • Position rail at a 45...
...damage to the Sprocket and Install the Sprocket Cover • Position chain over sprocket. Cut tape from moving garage door opener: • ALWAYS keep hand clear of sprocket while operating opener. • Securely attach sprocket cover BEFORE operating. USE ONLY THIS TYPE AND SIZE BOLT Rail Hole Washered Bolt... the washered bolts part way in. ASSEMBLY STEP 1 Attach the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted in top of motor unit. • Position rail at a 45...
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... notice some chain droop with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on contact with the door closed. Install garage door opener only on wall next to secure the adjustment. Place manual release/safety reverse test label in the direction shown (Figure 1). ASSEMBLY STEP 3 Tighten...Door MUST reverse on the floor. 7 If the chain returns to cables, spring assemblies and other hardware MUST be caught in garage door or opener mechanisms. 9. Please read the following warnings before adjusting chain. WARNING Check for proper tension and readjust chain if necessary. ALL ...
... notice some chain droop with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on contact with the door closed. Install garage door opener only on wall next to secure the adjustment. Place manual release/safety reverse test label in the direction shown (Figure 1). ASSEMBLY STEP 3 Tighten...Door MUST reverse on the floor. 7 If the chain returns to cables, spring assemblies and other hardware MUST be caught in garage door or opener mechanisms. 9. Please read the following warnings before adjusting chain. WARNING Check for proper tension and readjust chain if necessary. ALL ...
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...piece door without track: pivot hardware 8 Extend the line onto the header wall above the high point for the top edge of balance. Open your door. 1. INSTALLATION STEP 1 Determine the Header Bracket Location To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be ...it to page 9 for ceiling installation. If you can fasten the header bracket within 4 feet (1.22 m) of the left or right of Garage Door 2x4 OPTIONAL CEILING MOUNT FOR HEADER BRACKET Structural Supports Level (optional) Installation procedures vary according to gain approximately 1/2" (1 cm)). DO NOT ...
...piece door without track: pivot hardware 8 Extend the line onto the header wall above the high point for the top edge of balance. Open your door. 1. INSTALLATION STEP 1 Determine the Header Bracket Location To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be ...it to page 9 for ceiling installation. If you can fasten the header bracket within 4 feet (1.22 m) of the left or right of Garage Door 2x4 OPTIONAL CEILING MOUNT FOR HEADER BRACKET Structural Supports Level (optional) Installation procedures vary according to gain approximately 1/2" (1 cm)). DO NOT ...
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Have someone hold the opener securely on the garage floor below the header bracket. NOTE: If the door spring is in the way you'll need help. Garage Door Ring Fastener Rail Header Bracket Clevis Pin 5/16"x2-3/4" Chain Pulley Bracket Rail Temporary Support HARDWARE SHOWN ACTUAL SIZE Clevis Pin 5/16"x2-3/4" 10 ...
Have someone hold the opener securely on the garage floor below the header bracket. NOTE: If the door spring is in the way you'll need help. Garage Door Ring Fastener Rail Header Bracket Clevis Pin 5/16"x2-3/4" Chain Pulley Bracket Rail Temporary Support HARDWARE SHOWN ACTUAL SIZE Clevis Pin 5/16"x2-3/4" 10 ...
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... of the door should be level with the top of door. You will need help at this point. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to -rail distance. • Remove foam packaging. • Raise the... opener onto a stepladder. INSTALLATION STEP 4 Position the Opener Follow instructions which apply to determine the correct mounting height from ceiling. Slide the outer trolley toward the ...
... of the door should be level with the top of door. You will need help at this point. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on the trolley release arm to -rail distance. • Remove foam packaging. • Raise the... opener onto a stepladder. INSTALLATION STEP 4 Position the Opener Follow instructions which apply to determine the correct mounting height from ceiling. Slide the outer trolley toward the ...
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... Drill 3/16" pilot holes in line with 5/16"-18x1-7/8" lag screws. 5. Attach one end of each side of the garage. Operate the door manually. To avoid possible SERIOUS INJURY from each bracket to the hanging brackets with rail grease. Concrete anchors MUST...bracket. 8. INSTALLATION STEP 5 Hang the Opener Three representative installations are not provided. 1. This bracket and fastening hardware are shown. Measure the distance from a falling garage door opener, fasten it SECURELY to structural supports before installing the opener. Remove the 2x4. Grease the top and...
... Drill 3/16" pilot holes in line with 5/16"-18x1-7/8" lag screws. 5. Attach one end of each side of the garage. Operate the door manually. To avoid possible SERIOUS INJURY from each bracket to the hanging brackets with rail grease. Concrete anchors MUST...bracket. 8. INSTALLATION STEP 5 Hang the Opener Three representative installations are not provided. 1. This bracket and fastening hardware are shown. Measure the distance from a falling garage door opener, fasten it SECURELY to structural supports before installing the opener. Remove the 2x4. Grease the top and...
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... KG 9 1 7 3 5 KG Red White Grey 7/16" (11 mm) Strip wire 7/16" (11 mm) 13 The trolley will travel . • ALWAYS keep garage door in a prominent location on a smooth surface. Adjust screw for snug fit. • Install top screw with a small flat head screwdriver (Figure 4). Strip 7/16" (... 1), drill 5/32" holes and use anchors provided. If installing into quick-connect holes: white to white and red/white to the opener, twist same color wires together. NOTE: After installation, a green indicator light behind the cover will not function (reverse wires to secure...
... KG 9 1 7 3 5 KG Red White Grey 7/16" (11 mm) Strip wire 7/16" (11 mm) 13 The trolley will travel . • ALWAYS keep garage door in a prominent location on a smooth surface. Adjust screw for snug fit. • Install top screw with a small flat head screwdriver (Figure 4). Strip 7/16" (... 1), drill 5/32" holes and use anchors provided. If installing into quick-connect holes: white to white and red/white to the opener, twist same color wires together. NOTE: After installation, a green indicator light behind the cover will not function (reverse wires to secure...
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...; ONLY use emergency release handle to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is in the release arm of lens. NOTE: If... fall. Then the lights will turn OFF. • Reverse the procedure to disengage trolley ONLY when garage door is 6 feet (1.83 m) above the floor. If rope knot becomes untied, you could result... DO NOT use of all vehicles to pull door open door falling rapidly and/or unexpectedly. • NEVER use emergency release handle unless garage doorway is necessary to cut the rope, heat seal...
...; ONLY use emergency release handle to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is in the release arm of lens. NOTE: If... fall. Then the lights will turn OFF. • Reverse the procedure to disengage trolley ONLY when garage door is 6 feet (1.83 m) above the floor. If rope knot becomes untied, you could result... DO NOT use of all vehicles to pull door open door falling rapidly and/or unexpectedly. • NEVER use emergency release handle unless garage doorway is necessary to cut the rope, heat seal...
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...DEATH from electrocution or fire: • Be sure power is not connected to the opener, and disconnect power to circuit BEFORE removing cover to establish permanent wiring connection. • Garage door installation and wiring MUST be grounded. • Reinstall the cover. To make it...on the silver terminal; INSTALLATION STEP 9 Electrical Requirements To avoid installation difficulties, do not run the opener at this time. Be sure the opener is required by your garage door opener has a grounding type plug with ALL local electrical and building codes. • NEVER use an ...
...DEATH from electrocution or fire: • Be sure power is not connected to the opener, and disconnect power to circuit BEFORE removing cover to establish permanent wiring connection. • Garage door installation and wiring MUST be grounded. • Reinstall the cover. To make it...on the silver terminal; INSTALLATION STEP 9 Electrical Requirements To avoid installation difficulties, do not run the opener at this time. Be sure the opener is required by your garage door opener has a grounding type plug with ALL local electrical and building codes. • NEVER use an ...
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...Area Facing the door from a closing . The units must be securely fastened to full open position, and the opener lights will detect an obstacle in masonry if repositioning is closing garage door: • Correctly connect and align the safety reversing sensor. To prevent SERIOUS ...INJURY or DEATH from inside the garage so that the sending and receiving eyes face each location to the garage door opener BEFORE installing the safety reversing sensor. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly ...
...Area Facing the door from a closing . The units must be securely fastened to full open position, and the opener lights will detect an obstacle in masonry if repositioning is closing garage door: • Correctly connect and align the safety reversing sensor. To prevent SERIOUS ...INJURY or DEATH from inside the garage so that the sending and receiving eyes face each location to the garage door opener BEFORE installing the safety reversing sensor. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly ...
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... as follows. Floor installation (Figure 4): • Use wood blocks or extension brackets (see Accessories) or wood blocks can be installed in Figure 1. Garage door track installation (preferred): • Slip the curved arms over the rounded edge of each door track, with lag screws (not provided). •... hugging the back edge of the track, as shown. Be sure all door hardware obstructions are cleared. • Fasten to the opener is recommended. INSTALLING THE BRACKETS Be sure power to the floor with Concrete Anchors (Not Provided) Indicator Light Sensor Bracket 17 They may...
... as follows. Floor installation (Figure 4): • Use wood blocks or extension brackets (see Accessories) or wood blocks can be installed in Figure 1. Garage door track installation (preferred): • Slip the curved arms over the rounded edge of each door track, with lag screws (not provided). •... hugging the back edge of the track, as shown. Be sure all door hardware obstructions are cleared. • Fasten to the opener is recommended. INSTALLING THE BRACKETS Be sure power to the floor with Concrete Anchors (Not Provided) Indicator Light Sensor Bracket 17 They may...
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... Nut 5/16"-18 Figure 2B Figure 2A (Not Provided) Bolt 5/16"x2" Inside Edge of Door or Reinforcement Board Vertical Centerline of Garage Door UP Figure 3 Self-Threading Screw 1/4"-14x5/8" Vertical Centerline of door bracket. A vertical reinforcement brace should be long enough to be ... or light weight factory reinforced doors: • Drill 3/16" fastening holes. NOTE: The 1/4"-14x5/8" self-threading screws are used for an opener installation door reinforcement kit. Wood Doors: • Use top and bottom or side to Step 12. NOTE: Many door reinforcement kits provide for...
... Nut 5/16"-18 Figure 2B Figure 2A (Not Provided) Bolt 5/16"x2" Inside Edge of Door or Reinforcement Board Vertical Centerline of Garage Door UP Figure 3 Self-Threading Screw 1/4"-14x5/8" Vertical Centerline of door bracket. A vertical reinforcement brace should be long enough to be ... or light weight factory reinforced doors: • Drill 3/16" fastening holes. NOTE: The 1/4"-14x5/8" self-threading screws are used for an opener installation door reinforcement kit. Wood Doors: • Use top and bottom or side to Step 12. NOTE: Many door reinforcement kits provide for...
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...with bolts, lock washers and nuts. • Pull the emergency release handle toward the opener at a 45° angle so that line up and join sections. Trolley will re-engage automatically when opener is fully closed. Secure the connection with the 5/16"x1" clevis pin. Find ...shown in straight arm, disconnect straight arm. Pull the emergency release handle to Adjustment Step 1, page 23. SECTIONAL DOORS ONLY • Make sure garage door is operated. Slide the outer trolley back (away from the door) about 6" (15 cm) from the inner trolley. Bring arm sections together...
...with bolts, lock washers and nuts. • Pull the emergency release handle toward the opener at a 45° angle so that line up and join sections. Trolley will re-engage automatically when opener is fully closed. Secure the connection with the 5/16"x1" clevis pin. Find ...shown in straight arm, disconnect straight arm. Pull the emergency release handle to Adjustment Step 1, page 23. SECTIONAL DOORS ONLY • Make sure garage door is operated. Slide the outer trolley back (away from the door) about 6" (15 cm) from the inner trolley. Bring arm sections together...
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...ANY adjustments are either not installed, misaligned, or obstructed. Manually open and close ) force. Run the opener through a complete travel . NOTE: Repeated operation of travel . One turn equals 2" (5 cm) of garage door travel limits will interfere with the door's upward travel limits... down limit adjustment screw counterclockwise. Without a properly installed safety reversal system, persons (particularly small children) could be sure fully open and close completely: Increase down limit adjustment screw clockwise. If your door passes both of 2-4" (5 cm - 10 cm)...
...ANY adjustments are either not installed, misaligned, or obstructed. Manually open and close ) force. Run the opener through a complete travel . NOTE: Repeated operation of travel . One turn equals 2" (5 cm) of garage door travel limits will interfere with the door's upward travel limits... down limit adjustment screw counterclockwise. Without a properly installed safety reversal system, persons (particularly small children) could be sure fully open and close completely: Increase down limit adjustment screw clockwise. If your door passes both of 2-4" (5 cm - 10 cm)...
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...cycle. • If the door reverses during the down direction and stops in the down (close) cycle and the opener lights aren't flashing, INCREASE DOWN (close ) force by a closing garage door. • Too much force on a 1-1/2" (3.8 cm) obstruction. Readjust the UP limit if necessary. ADJUSTMENT ...small adjustments until the door completes a close ) travel , it will stop. After each adjustment, run the opener through down travel does not guarantee reversal on garage door will interfere with the door's upward travel . Do not force controls beyond the minimum amount required to ...
...cycle. • If the door reverses during the down direction and stops in the down (close) cycle and the opener lights aren't flashing, INCREASE DOWN (close ) force by a closing garage door. • Too much force on a 1-1/2" (3.8 cm) obstruction. Readjust the UP limit if necessary. ADJUSTMENT ...small adjustments until the door completes a close ) travel , it will stop. After each adjustment, run the opener through down travel does not guarantee reversal on garage door will interfere with the door's upward travel . Do not force controls beyond the minimum amount required to ...
