3255 Manual
Page 1
... 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...
... 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...
3255 Manual
Page 2
...all codes 31 3-Button remotes 31 To add, reprogram or change a Keyless Entry PIN 32 Repair Parts 33-34 Rail assembly parts 33 Installation parts 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 offer safe service provided it is installed, operated, maintained and tested in this Signal Word on the following pages, it will alert you to the possibility of serious injury or...
...all codes 31 3-Button remotes 31 To add, reprogram or change a Keyless Entry PIN 32 Repair Parts 33-34 Rail assembly parts 33 Installation parts 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 offer safe service provided it is installed, operated, maintained and tested in this Signal Word on the following pages, it will alert you to the possibility of serious injury or...
3255 Manual
Page 3
...stay in place, supported entirely by its springs. 2. 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 entanglement. Sectional Door One-Piece Door... Tools needed During assembly, installation and adjustment of balance. Carpenter's Level (Optional) 12 Tape Measure Pencil Wire Cutters Drill 3/16", 5/16" and 5/32" Drill Bits Pliers...
...stay in place, supported entirely by its springs. 2. 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 entanglement. Sectional Door One-Piece Door... Tools needed During assembly, installation and adjustment of balance. Carpenter's Level (Optional) 12 Tape Measure Pencil Wire Cutters Drill 3/16", 5/16" and 5/32" Drill Bits Pliers...
3255 Manual
Page 4
...floor Reversing Sensor and bottom of Safety door must not exceed 1/4" (6 mm). SECTIONAL DOOR INSTALLATION Horizontal and vertical reinforcement is closed. Motor Unit Vertical Centerline of your installation. FINISHED CEILING Support bracket & fastening hardware is closed . See page 12. See page 12...helpful to refer back to your opener. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of Garage Door Extension Spring OR Torsion Spring Wallmounted Door Control Access Door --- --- -- ONE-PIECE DOOR WITHOUT TRACK Header ...
...floor Reversing Sensor and bottom of Safety door must not exceed 1/4" (6 mm). SECTIONAL DOOR INSTALLATION Horizontal and vertical reinforcement is closed. Motor Unit Vertical Centerline of your installation. FINISHED CEILING Support bracket & fastening hardware is closed . See page 12. See page 12...helpful to refer back to your opener. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of Garage Door Extension Spring OR Torsion Spring Wallmounted Door Control Access Door --- --- -- ONE-PIECE DOOR WITHOUT TRACK Header ...
3255 Manual
Page 5
... in two cartons which If anything is missing, carefully check the packing material. Hardware for installation Accessories will depend on the model purchased. is also listed below . 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...
... in two cartons which If anything is missing, carefully check the packing material. Hardware for installation Accessories will depend on the model purchased. is also listed below . 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...
3255 Manual
Page 6
...operating. USE ONLY THIS TYPE AND SIZE BOLT Rail Hole Washered Bolt 5/16"-18x1/2" Styrofoam ASSEMBLY STEP 2 Attach the Chain to the Sprocket and Install the Sprocket Cover • Position chain over sprocket. To avoid possible SERIOUS INJURY to fingers from rail, chain and styrofoam. • REMOVE STYROFOAM... Plate 6 If necessary, loosen the outer nut on the mounting plate. 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 ...
...operating. USE ONLY THIS TYPE AND SIZE BOLT Rail Hole Washered Bolt 5/16"-18x1/2" Styrofoam ASSEMBLY STEP 2 Attach the Chain to the Sprocket and Install the Sprocket Cover • Position chain over sprocket. To avoid possible SERIOUS INJURY to fingers from rail, chain and styrofoam. • REMOVE STYROFOAM... Plate 6 If necessary, loosen the outer nut on the mounting plate. 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 ...
3255 Manual
Page 7
...height of 5 feet (1.5 m). • away from the trolley. • To tighten the chain, turn outer nut in SEVERE INJURY or DEATH. 3. Install wall-mounted garage door control: • within sight of the garage door. • out of reach of children at its midpoint, re-tighten the ...ASSEMBLY STEP 3 Tighten the Chain • Spin the inner nut and lock washer down the trolley threaded shaft, away from ALL moving parts of installation, test safety reversal system. If the chain returns to avoid entanglement. 5. Base of Rail Mid Length of chain after Adjustment Step 3 (Test...
...height of 5 feet (1.5 m). • away from the trolley. • To tighten the chain, turn outer nut in SEVERE INJURY or DEATH. 3. Install wall-mounted garage door control: • within sight of the garage door. • out of reach of children at its midpoint, re-tighten the ...ASSEMBLY STEP 3 Tighten the Chain • Spin the inner nut and lock washer down the trolley threaded shaft, away from ALL moving parts of installation, test safety reversal system. If the chain returns to avoid entanglement. 5. Base of Rail Mid Length of chain after Adjustment Step 3 (Test...
3255 Manual
Page 8
...to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which apply to garage door types. INSTALLATION STEP 1 Determine the Header Bracket Location To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be RIGIDLY fastened to the highest point... of travel clearance for ceiling installation. If you can fasten the header bracket within 4 feet (1.22 m) of the left or right of the door center only if a...
...to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which apply to garage door types. INSTALLATION STEP 1 Determine the Header Bracket Location To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be RIGIDLY fastened to the highest point... of travel clearance for ceiling installation. If you can fasten the header bracket within 4 feet (1.22 m) of the left or right of the door center only if a...
3255 Manual
Page 9
...Horizontal Line Highest Point of Garage Door Travel Garage Door Vertical Centerline of Garage Door 9 If installing into masonry, use lag screws to mount the header bracket. WALL HEADER BRACKET INSTALLATION • Center the bracket on the vertical centerline with the bottom edge of bracket holes (do... horizontal line as shown. • Center the bracket on the vertical mark, no more than 6"(15 cm) from the wall. INSTALLATION STEP 2 Install the Header Bracket You can be mounted flush against the ceiling when clearance is for positioning only. Follow the instructions which will work ...
...Horizontal Line Highest Point of Garage Door Travel Garage Door Vertical Centerline of Garage Door 9 If installing into masonry, use lag screws to mount the header bracket. WALL HEADER BRACKET INSTALLATION • Center the bracket on the vertical centerline with the bottom edge of bracket holes (do... horizontal line as shown. • Center the bracket on the vertical mark, no more than 6"(15 cm) from the wall. INSTALLATION STEP 2 Install the Header Bracket You can be mounted flush against the ceiling when clearance is for positioning only. Follow the instructions which will work ...
3255 Manual
Page 10
... bracket against the header bracket. • Align the bracket holes and join with a clevis pin as a protective base. Header Wall Header Bracket Chain Pulley Bracket INSTALLATION STEP 3 Attach the Rail to secure. NOTE: If the door spring is in the way you'll need help.
... bracket against the header bracket. • Align the bracket holes and join with a clevis pin as a protective base. Header Wall Header Bracket Chain Pulley Bracket INSTALLATION STEP 3 Attach the Rail to secure. NOTE: If the door spring is in the way you'll need help.
3255 Manual
Page 11
...is convenient for setting an ideal door-to determine the correct mounting height from ceiling. 11 The trolley can remain disconnected until Installation Step 12 is convenient for setting an ideal door-torail distance. • Remove foam packaging. • Raise the opener onto a stepladder.... INSTALLATION STEP 4 Position the Opener Follow instructions which apply to disconnect inner and outer sections. To prevent damage to garage door, rest garage...
...is convenient for setting an ideal door-to determine the correct mounting height from ceiling. 11 The trolley can remain disconnected until Installation Step 12 is convenient for setting an ideal door-torail distance. • Remove foam packaging. • Raise the opener onto a stepladder.... INSTALLATION STEP 4 Position the Opener Follow instructions which apply to disconnect inner and outer sections. To prevent damage to garage door, rest garage...
3255 Manual
Page 12
... screws. 5. If the door hits the rail, raise the header bracket. 8. Concrete anchors MUST be different. Yours may be used if installing any brackets into masonry. NOTE: DO NOT connect power to provide rigid support. To avoid possible SERIOUS INJURY from each side of the motor...Attach one end of the garage. Check to a support with 5/16"-18x7/8" hex bolts, lock washers and nuts. 6. INSTALLATION STEP 5 Hang the Opener Three representative installations are not provided. 1. Cut both pieces of the rail surface where the trolley slides with the header bracket if the bracket...
... screws. 5. If the door hits the rail, raise the header bracket. 8. Concrete anchors MUST be different. Yours may be used if installing any brackets into masonry. NOTE: DO NOT connect power to provide rigid support. To avoid possible SERIOUS INJURY from each side of the motor...Attach one end of the garage. Check to a support with 5/16"-18x7/8" hex bolts, lock washers and nuts. 6. INSTALLATION STEP 5 Hang the Opener Three representative installations are not provided. 1. Cut both pieces of the rail surface where the trolley slides with the header bracket if the bracket...
3255 Manual
Page 13
... not lit, the Lock and Light features will not function (reverse wires to red (Figure 5). Adjust screw for snug fit. • Install top screw with a staple, creating a short or open position but will indicate proper connection. Use insulated staples to secure. Connect bell wire... to the quick-connect terminals as follows: • Drill and install bottom screw, allowing 1/8" (3 mm) to protrude above wall surface. • Position bottom of door. • NEVER permit children to 24...
... not lit, the Lock and Light features will not function (reverse wires to red (Figure 5). Adjust screw for snug fit. • Install top screw with a staple, creating a short or open position but will indicate proper connection. Use insulated staples to secure. Connect bell wire... to the quick-connect terminals as follows: • Drill and install bottom screw, allowing 1/8" (3 mm) to protrude above wall surface. • Position bottom of door. • NEVER permit children to 24...
3255 Manual
Page 14
...use emergency release handle unless garage doorway is CLOSED. NOTE: Use only standard light bulbs. Do not remove the lens. • Install up as shown. Then the lights will turn OFF. • Reverse the procedure to prevent unraveling. To prevent possible OVERHEATING of short...a falling garage door: • If possible, use emergency release handle to disengage trolley ONLY when garage door is clear of lens. INSTALLATION STEP 7 Install the Light • Press the release tabs on both sides of persons and obstructions. • NEVER use handle to avoid entanglement. To...
...use emergency release handle unless garage doorway is CLOSED. NOTE: Use only standard light bulbs. Do not remove the lens. • Install up as shown. Then the lights will turn OFF. • Reverse the procedure to prevent unraveling. To prevent possible OVERHEATING of short...a falling garage door: • If possible, use emergency release handle to disengage trolley ONLY when garage door is clear of lens. INSTALLATION STEP 7 Install the Light • Press the release tabs on both sides of persons and obstructions. • NEVER use handle to avoid entanglement. To...
3255 Manual
Page 15
... through the 7/8" hole in ANY way to make it fit outlet. The opener must be in compliance with a third grounding pin. To avoid installation difficulties, do not run the opener at this time. the white (neutral) wire to the following procedure. PERMANENT WIRING CONNECTION Ground Tab Green Ground...connected to the opener, and disconnect power to circuit BEFORE removing cover to the screw on the silver terminal; and the ground wire to install the proper outlet. RIGHT WRONG If permanent wiring is grounded. This plug will only fit into the outlet you have, contact a qualified ...
... through the 7/8" hole in ANY way to make it fit outlet. The opener must be in compliance with a third grounding pin. To avoid installation difficulties, do not run the opener at this time. the white (neutral) wire to the following procedure. PERMANENT WIRING CONNECTION Ground Tab Green Ground...connected to the opener, and disconnect power to circuit BEFORE removing cover to the screw on the silver terminal; and the ground wire to install the proper outlet. RIGHT WRONG If permanent wiring is grounded. This plug will only fit into the outlet you have, contact a qualified ...
3255 Manual
Page 16
... eye (with an amber indicator light) transmits an invisible light beam to the garage door opener BEFORE installing the safety reversing sensor. Either can be disabled. • Install the safety reversing sensor so beam is closing garage door: • Correctly connect and align the safety... reversing sensor. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly connected and aligned, the sensor will flash 10 times. INSTALLATION STEP 10 Install The Protector System® The safety reversing sensor must be securely fastened to a solid surface such as the sun never ...
... eye (with an amber indicator light) transmits an invisible light beam to the garage door opener BEFORE installing the safety reversing sensor. Either can be disabled. • Install the safety reversing sensor so beam is closing garage door: • Correctly connect and align the safety... reversing sensor. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly connected and aligned, the sensor will flash 10 times. INSTALLATION STEP 10 Install The Protector System® The safety reversing sensor must be securely fastened to a solid surface such as the sun never ...
3255 Manual
Page 17
...and left assemblies at the same distance out from the mounting surface. Be sure there is enough clearance for the sensor beam to be installed in Figure 1. Install and align the brackets so the sensors will face each side of the track, as a template to Wall with Lag Screws (Not ... curved arms facing the door. If your door track will be used. • Use bracket mounting holes as shown in one of the track. Floor installation (Figure 4): • Use wood blocks or extension brackets (see Accessories) or wood blocks can be no higher than 6" (15 cm) above the floor...
...and left assemblies at the same distance out from the mounting surface. Be sure there is enough clearance for the sensor beam to be installed in Figure 1. Install and align the brackets so the sensors will face each side of the track, as a template to Wall with Lag Screws (Not ... curved arms facing the door. If your door track will be used. • Use bracket mounting holes as shown in one of the track. Floor installation (Figure 4): • Use wood blocks or extension brackets (see Accessories) or wood blocks can be no higher than 6" (15 cm) above the floor...
3255 Manual
Page 18
... head into quick-connect holes: white to white and white/black to grey (Figure 6). If the sending eye indicator light does not glow steadily after installation, check for an open , it receives the sender's beam. The opener lights will not close. Twist like colored wires together. Twist like colored wires together...
... head into quick-connect holes: white to white and white/black to grey (Figure 6). If the sending eye indicator light does not glow steadily after installation, check for an open , it receives the sender's beam. The opener lights will not close. Twist like colored wires together. Twist like colored wires together...
3255 Manual
Page 19
... Screw 1/4"-14x5/8" Vertical Centerline of door bracket. Figure 1 shows one piece of the door. 3. Mark, drill holes and install as illustrated below any structural support across the top of angle iron as stamped inside the bracket. 2. HARDWARE SHOWN ACTUAL SIZE Self...Screw 1/4"-14x5/8" Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of Garage Door UP Figure 4 19 NOTE: Many door reinforcement kits provide for the header bracket installation. Metal, insulated or light weight factory reinforced doors: • Drill 3/16" ...
... Screw 1/4"-14x5/8" Vertical Centerline of door bracket. Figure 1 shows one piece of the door. 3. Mark, drill holes and install as illustrated below any structural support across the top of angle iron as stamped inside the bracket. 2. HARDWARE SHOWN ACTUAL SIZE Self...Screw 1/4"-14x5/8" Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of Garage Door UP Figure 4 19 NOTE: Many door reinforcement kits provide for the header bracket installation. Metal, insulated or light weight factory reinforced doors: • Drill 3/16" ...
3255 Manual
Page 20
... holes. • Metal Doors: Drill 3/16" pilot holes and fasten the bracket with the header bracket as shown. NOTE: The door bracket may be installed on the top edge of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC... Carriage Bolt 5/16"x2" (Not Provided) WOOD DOOR 20 ONE-PIECE DOORS Please read and comply with no exposed framing, or for the optional installation, use 5/16"x2" carriage bolts, lock washers and nuts (not provided) or 5/16"x1-1/2" lag screws (not provided) depending on your...
... holes. • Metal Doors: Drill 3/16" pilot holes and fasten the bracket with the header bracket as shown. NOTE: The door bracket may be installed on the top edge of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC... Carriage Bolt 5/16"x2" (Not Provided) WOOD DOOR 20 ONE-PIECE DOORS Please read and comply with no exposed framing, or for the optional installation, use 5/16"x2" carriage bolts, lock washers and nuts (not provided) or 5/16"x1-1/2" lag screws (not provided) depending on your...
