3255 Manual
Page 1
® 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 CLOSE unless...
® 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 CLOSE unless...
3255 Manual
Page 2
...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 ...the Protector System 25 Operation 26-30 Operation safety instructions 26 Using your garage door opener 26 Using the wall-mounted door control 27 To open the door manually 27 Care of your garage door and/or the garage door opener if you do not comply with the warnings that accompany it. ...
...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 ...the Protector System 25 Operation 26-30 Operation safety instructions 26 Using your garage door opener 26 Using the wall-mounted door control 27 To open the door manually 27 Care of your garage door and/or the garage door opener if you do not comply with the warnings that accompany it. ...
3255 Manual
Page 3
... under EXTREME tension. • Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of the opener, instructions will call a trained door systems technician. Carpenter's Level (Optional) 12 Tape Measure Pencil Wire Cutters Drill...
... under EXTREME tension. • Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing and operating garage door opener to loosen, move or adjust garage door, door springs, cables, pulleys, brackets or their hardware, ALL of the opener, instructions will call a trained door systems technician. Carpenter's Level (Optional) 12 Tape Measure Pencil Wire Cutters Drill...
3255 Manual
Page 4
...Wall Slack in chain tension is normal when garage door is closed . FINISHED CEILING Support bracket & fastening hardware is required. Motor Unit Wallmounted Door Control Access Door ONE-PIECE DOOR WITH TRACK Slack in chain tension is normal when garage door is needed for details. Reversing Sensor 4...1/4" (6 mm). You may be required. Additional materials may find it helpful to refer back to your garage door. Motor Unit Vertical Centerline of door must not exceed 1/4" (6 mm). Safety Reversing Sensor Safety Reversing Sensor Gap between floor and bottom of the...
...Wall Slack in chain tension is normal when garage door is closed . FINISHED CEILING Support bracket & fastening hardware is required. Motor Unit Wallmounted Door Control Access Door ONE-PIECE DOOR WITH TRACK Slack in chain tension is normal when garage door is needed for details. Reversing Sensor 4...1/4" (6 mm). You may be required. Additional materials may find it helpful to refer back to your garage door. Motor Unit Vertical Centerline of door must not exceed 1/4" (6 mm). Safety Reversing Sensor Safety Reversing Sensor Gap between floor and bottom of the...
3255 Manual
Page 5
...check the packing material. 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 ...Door Bracket Safety Sensor Bracket (2) The Protector System® (2) Safety Reversing Sensors (1 Sending Eye and 1 Receiving Eye) with Light Lens CEILING MOUNT ONLY UP Header Bracket 2 Conductor Bell Wire White & White/Red? Hardware for installation Accessories will depend on the model purchased. Carton Inventory Your garage door...
...check the packing material. 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 ...Door Bracket Safety Sensor Bracket (2) The Protector System® (2) Safety Reversing Sensors (1 Sending Eye and 1 Receiving Eye) with Light Lens CEILING MOUNT ONLY UP Header Bracket 2 Conductor Bell Wire White & White/Red? Hardware for installation Accessories will depend on the model purchased. Carton Inventory Your garage door...
3255 Manual
Page 6
Use of any other bolts will cause serious damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. To avoid SERIOUS damage to door opener. • Align rail and styrofoam over the sprocket. Squeeze the cover slightly and insert the front tab in the ...rail, chain and styrofoam. • REMOVE STYROFOAM. 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˚...
Use of any other bolts will cause serious damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. To avoid SERIOUS damage to door opener. • Align rail and styrofoam over the sprocket. Squeeze the cover slightly and insert the front tab in the ...rail, chain and styrofoam. • REMOVE STYROFOAM. 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˚...
3255 Manual
Page 7
... m). • away from the trolley. • To tighten the chain, turn outer nut 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 its midpoint, re-tighten the inner nut to the position... Spin the inner nut and lock washer down the trolley threaded shaft, away from ALL moving parts of Rail You have now finished assembling your garage door opener. When installation is approximately 1/2" (13 mm) above floor. 7. You may notice some chain droop with a 1-1/2" (3.8 cm) high ...
... m). • away from the trolley. • To tighten the chain, turn outer nut 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 its midpoint, re-tighten the inner nut to the position... Spin the inner nut and lock washer down the trolley threaded shaft, away from ALL moving parts of Rail You have now finished assembling your garage door opener. When installation is approximately 1/2" (13 mm) above floor. 7. You may notice some chain droop with a 1-1/2" (3.8 cm) high ...
3255 Manual
Page 8
...ceiling), use the maximum height possible, or refer to garage door types. Follow the instructions which are under EXTREME tension. • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of the garage door. 2. Open your door. 1. DO NOT install header bracket over drywall. •... bracket or 2x4 into masonry. • NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which apply to your door to gain approximately 1/2" (1 cm)). This height will provide travel as shown here and...
...ceiling), use the maximum height possible, or refer to garage door types. Follow the instructions which are under EXTREME tension. • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of the garage door. 2. Open your door. 1. DO NOT install header bracket over drywall. •... bracket or 2x4 into masonry. • NEVER try to loosen, move or adjust garage door, springs, cables, pulleys, brackets, or their hardware, ALL of which apply to your door to gain approximately 1/2" (1 cm)). This height will provide travel as shown here and...
3255 Manual
Page 9
...screws to a structural support with the hardware provided. Finished Ceiling - Header Bracket Vertical Centerline of Garage Door UP Lag Screws 5/16"-9x1-5/8" Garage Door Header Wall Vertical Centerline of bracket holes (do not use concrete anchors (not provided). Follow the ... Support Header Bracket CEILING MOUNT ONLY UP Vertical Centerline of Garage Door Lag Screws 5/16"-9x1-5/8" Door Spring Horizontal Line Highest Point of Garage Door Travel Garage Door Vertical Centerline of Garage Door 6" (15 cm) Maximum Door Spring - Wall Mounting Holes CEILING MOUNT ONLY UP The nail...
...screws to a structural support with the hardware provided. Finished Ceiling - Header Bracket Vertical Centerline of Garage Door UP Lag Screws 5/16"-9x1-5/8" Garage Door Header Wall Vertical Centerline of bracket holes (do not use concrete anchors (not provided). Follow the ... Support Header Bracket CEILING MOUNT ONLY UP Vertical Centerline of Garage Door Lag Screws 5/16"-9x1-5/8" Door Spring Horizontal Line Highest Point of Garage Door Travel Garage Door Vertical Centerline of Garage Door 6" (15 cm) Maximum Door Spring - Wall Mounting Holes CEILING MOUNT ONLY UP The nail...
3255 Manual
Page 10
...the spring. • Position the rail bracket against the header bracket. • Align the bracket holes and join with a clevis pin as a protective base. 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 Ring... Fastener Header Wall Header Bracket Chain Pulley Bracket INSTALLATION STEP 3 Attach the Rail to secure. 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.
...the spring. • Position the rail bracket against the header bracket. • Align the bracket holes and join with a clevis pin as a protective base. 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 Ring... Fastener Header Wall Header Bracket Chain Pulley Bracket INSTALLATION STEP 3 Attach the Rail to secure. 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.
3255 Manual
Page 11
... distance. • Remove foam packaging. • Raise the opener onto a stepladder. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of Door 2x4 is used to determine the correct mounting height from ceiling. You will need help at this point if the ...ladder is convenient for setting an ideal door-to determine the correct mounting height from ceiling. 11 ...
... distance. • Remove foam packaging. • Raise the opener onto a stepladder. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of Door 2x4 is used to determine the correct mounting height from ceiling. You will need help at this point if the ...ladder is convenient for setting an ideal door-to determine the correct mounting height from ceiling. 11 ...
3255 Manual
Page 12
... with rail grease. Remove the 2x4. NOTE: DO NOT connect power to provide rigid support. Grease the top and underside of the garage. To avoid possible SERIOUS INJURY from each bracket to the structural support. 2. Check to structural supports of the rail surface where the ...trolley slides with the header bracket if the bracket is not centered above the door). 7. This bracket and fastening hardware are shown. Measure the distance from a falling garage door opener, fasten it SECURELY to make sure the rail is centered over the...
... with rail grease. Remove the 2x4. NOTE: DO NOT connect power to provide rigid support. Grease the top and underside of the garage. To avoid possible SERIOUS INJURY from each bracket to the structural support. 2. Check to structural supports of the rail surface where the ...trolley slides with the header bracket if the bracket is not centered above the door). 7. This bracket and fastening hardware are shown. Measure the distance from a falling garage door opener, fasten it SECURELY to make sure the rail is centered over the...
3255 Manual
Page 13
... (as follows: white to white and white/red to red (Figure 5). NOTE: When connecting multiple door controls to cross path of closing garage door: • Install door control within sight of the door at a minimum height of 5 feet (1.5 m) where small children cannot reach, and away from electrocution...it can be seen clearly, is properly adjusted, and there are no obstructions to door travel to avoid cracking plastic housing. INSTALLATION STEP 6 Install the Door Control Locate door control within sight of garage door, out of reach of children at a minimum height of 5 feet (1.5 m),...
... (as follows: white to white and white/red to red (Figure 5). NOTE: When connecting multiple door controls to cross path of closing garage door: • Install door control within sight of the door at a minimum height of 5 feet (1.5 m) where small children cannot reach, and away from electrocution...it can be seen clearly, is properly adjusted, and there are no obstructions to door travel to avoid cracking plastic housing. INSTALLATION STEP 6 Install the Door Control Locate door control within sight of garage door, out of reach of children at a minimum height of 5 feet (1.5 m),...
3255 Manual
Page 14
..., standard neck only. Then the lights will turn OFF. • Reverse the procedure to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is clear of persons and obstructions. • NEVER use emergency release handle unless...• Press the release tabs on both sides of all vehicles to avoid entanglement. The use emergency release handle to disengage trolley ONLY when garage door is necessary to cut the rope, heat seal the cut end with a match or lighter to prevent unraveling. Overhand Knot Trolley Rope NOTICE ...
..., standard neck only. Then the lights will turn OFF. • Reverse the procedure to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is clear of persons and obstructions. • NEVER use emergency release handle unless...• Press the release tabs on both sides of all vehicles to avoid entanglement. The use emergency release handle to disengage trolley ONLY when garage door is necessary to cut the rope, heat seal the cut end with a match or lighter to prevent unraveling. Overhand Knot Trolley Rope NOTICE ...
3255 Manual
Page 15
... attached 3-prong cord. • Connect the black (line) wire to the following procedure. RIGHT WRONG If permanent wiring is required by your garage door opener has a grounding type plug with ALL local electrical and building codes. • NEVER use an extension cord, 2-wire adapter, or change...this time. This plug will only fit into the outlet you have, contact a qualified electrician to establish permanent wiring connection. • Garage door installation and wiring MUST be grounded. • Reinstall the cover. The opener must be in the top of electric shock, your local ...
... attached 3-prong cord. • Connect the black (line) wire to the following procedure. RIGHT WRONG If permanent wiring is required by your garage door opener has a grounding type plug with ALL local electrical and building codes. • NEVER use an extension cord, 2-wire adapter, or change...this time. This plug will only fit into the outlet you have, contact a qualified electrician to establish permanent wiring connection. • Garage door installation and wiring MUST be grounded. • Reinstall the cover. The opener must be in the top of electric shock, your local ...
3255 Manual
Page 16
...disabled. • Install the safety reversing sensor so beam is necessary to avoid drilling extra holes in masonry if repositioning is closing garage door: • Correctly connect and align the safety reversing sensor. The sending eye (with an amber indicator light) transmits an invisible... floor INSTALLATION STEP 10 Install The Protector System® The safety reversing sensor must be connected and aligned correctly before the garage door opener will detect an obstacle in the path of its electronic beam. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly connected...
...disabled. • Install the safety reversing sensor so beam is necessary to avoid drilling extra holes in masonry if repositioning is closing garage door: • Correctly connect and align the safety reversing sensor. The sending eye (with an amber indicator light) transmits an invisible... floor INSTALLATION STEP 10 Install The Protector System® The safety reversing sensor must be connected and aligned correctly before the garage door opener will detect an obstacle in the path of its electronic beam. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly connected...
3255 Manual
Page 17
...obstructions are cleared. Snap into place against the wall with Concrete Anchors (Not Provided) Indicator Light Sensor Bracket 17 If your door track will face each other across the garage door, with the beam no higher than 6" (15 cm) above the floor. • Attach brackets to the floor with ...lag screws (not provided). • If using extension brackets or wood blocks, adjust right and left assemblies at each door track, with the lip...
...obstructions are cleared. Snap into place against the wall with Concrete Anchors (Not Provided) Indicator Light Sensor Bracket 17 If your door track will face each other across the garage door, with the beam no higher than 6" (15 cm) above the floor. • Attach brackets to the floor with ...lag screws (not provided). • If using extension brackets or wood blocks, adjust right and left assemblies at each door track, with the lip...
3255 Manual
Page 19
... REQUIRE reinforcement BEFORE installation of the top panel. Header Bracket Door Bracket Location Vertical Centerline of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC.). (NOT PROVIDED) Figure 1 Vertical Reinforcement Vertical Centerline of Garage Door UP Door Bracket Self-Threading Screw 1/4"-14x5/8" Vertical (Not Provided) Reinforcement Vertical Centerline...
... REQUIRE reinforcement BEFORE installation of the top panel. Header Bracket Door Bracket Location Vertical Centerline of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC.). (NOT PROVIDED) Figure 1 Vertical Reinforcement Vertical Centerline of Garage Door UP Door Bracket Self-Threading Screw 1/4"-14x5/8" Vertical (Not Provided) Reinforcement Vertical Centerline...
3255 Manual
Page 20
...-Threading Screw 1/4"-14x5/8" Header Wall 2x4 Support Finished Ceiling Header Bracket Door Bracket Optional Placement of Door Bracket Vertical Centerline of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC.). (NOT PROVIDED) Door Bracket Nut 5/16"-18 Door Bracket For a door with the header bracket as shown. NOTE: The...
...-Threading Screw 1/4"-14x5/8" Header Wall 2x4 Support Finished Ceiling Header Bracket Door Bracket Optional Placement of Door Bracket Vertical Centerline of Garage Door HORIZONTAL AND VERTICAL REINFORCEMENT IS NEEDED FOR LIGHTWEIGHT GARAGE DOORS (FIBERGLASS, ALUMINUM, STEEL, DOORS WITH GLASS PANEL, ETC.). (NOT PROVIDED) Door Bracket Nut 5/16"-18 Door Bracket For a door with the header bracket as shown. NOTE: The...
3255 Manual
Page 21
...x1-1/4" clevis pin. • Figure 2: - Fasten curved section to Adjustment Step 1, page 23. Select holes as far apart as possible to your door type as shown in straight arm, disconnect straight arm. If holes in curved arm are above holes in Figures 1, 2 and 3. • Figure... closed. Secure the connection with the 5/16"x1" clevis pin. SECTIONAL DOORS ONLY • Make sure garage door is operated. INSTALLATION STEP 12 Connect Door Arm to Trolley Follow instructions which apply to increase door arm rigidity. • Figure 3, Hole alignment alternative: - Bring arm sections...
...x1-1/4" clevis pin. • Figure 2: - Fasten curved section to Adjustment Step 1, page 23. Select holes as far apart as possible to your door type as shown in straight arm, disconnect straight arm. If holes in curved arm are above holes in Figures 1, 2 and 3. • Figure... closed. Secure the connection with the 5/16"x1" clevis pin. SECTIONAL DOORS ONLY • Make sure garage door is operated. INSTALLATION STEP 12 Connect Door Arm to Trolley Follow instructions which apply to increase door arm rigidity. • Figure 3, Hole alignment alternative: - Bring arm sections...
