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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
GARAGE DOOR OPENER
Model 3575C
For Residential Use Only
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 the Protector System is connected and properly
aligned.
■ Periodic checks of the opener are required to ensure safe operation.
■ The model number label is located on
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TABLE OF CONTENTS Introduction 2-5 Operation 26-32 Safety symbol and signal word review . . . . . . . . . . . . . . .2 Operation safety instructions . . . . . . . . . . . . . . . . . . . . . .26 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . .3 Using your garage door opener . . . . . . . . . . . . . . . . . . .26 Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Using the wall-mounted door control . . . . . . . . . . . . . . .27 Planning
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1 Preparing your garage door Before you begin: To prevent possible SERIOUS INJURY or DEATH: � Disable locks. • ALWAYS call a trained door systems technician if garage � Remove any ropes connected to garage door. door binds, sticks or is out of balance. An unbalanced garage door may not reverse when required. � Complete the following test to make sure your garage door is balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, bra
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— — — — — — — — Slack in chain tension is normal when garage door is closed. Slack in chain tension is normal when garage door is closed. 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 INSTA
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LOCK LIGHT Carton Inventory Your garage door opener is packaged in two cartons which If anything is missing, carefully check the packing material. contain the motor unit and all parts illustrated below. Parts may be stuck in the foam. Hardware for installation Accessories will depend on the model purchased. is also listed below. Chain Spreader ® SECURITY 3-Button Remote Control Model 373P (1) Remote Control Model 373PC (1) Transmitter Visor Clip Smart Control Panel™ Chain Styrofoam 2 Conductor
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ASSEMBLY STEP 1 Attach the T-Rail to the Motor Unit To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. To avoid installation difficulties, do not run the garage door opener until instructed to do so. � Remove the bolt and lock nut from the top of the motor Washered Bolt unit. 5/16"-18x1/2" Lock Nut � Place rail onto the bolt mounted on the motor unit and Styrofoam align the back hole with the hole in the top of the unit. T-rail Hole �
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Figure 1 ASSEMBLY STEP 3 Lock Washer Outer Nut Inner Nut Tighten the Chain To Tighten Outer Nut � Spin the inner nut and lock washer down the trolley To Tighten threaded shaft, away from the trolley. Inner Nut � To tighten the chain, turn outer nut in the direction shown (Figure 1). � When the chain is approximately 1/2" (13 mm) above Trolley the base of the rail at its midpoint, re-tighten the inner Figure 2 nut to secure the adjustment. Sprocket noise can result if chain is too loose. Chain W
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Unfinished Ceiling INSTALLATION STEP 1 OPTIONAL CEILING Determine the Header Bracket MOUNT FOR Location HEADER BRACKET 2x4 Header Wall Vertical Centerline of Garage Door To prevent possible SERIOUS INJURY or DEATH: 2x4 Structural • Header bracket MUST be RIGIDLY fastened to structural Supports 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
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INSTALLATION STEP 2 Install the Header Bracket Wall Mounting Holes You can attach the header bracket either to the wall above CEILING MOUNT ONLY the garage door, or to the ceiling. Follow the instructions The nail hole is for positioning only. which will work best for your particular requirements. Do You must use lag screws UP not install the header bracket over drywall. If installing to mount the header bracket. into masonry, use concrete anchors (not provided). WALL HEADER BRACKET INSTALLATION
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INSTALLATION STEP 3 Attach the Rail to the Header Bracket � 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 Header Wall temporary support to allow the rail to clear the spring. Header � Position the rail bracket against the header bracket. Bracket � Align the bracket holes and join with a clevis pin Chain as shown. Pulley Bracket � Inser
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INSTALLATION STEP 4 Position the Opener To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door. Follow instructions which apply to your door type as illustrated. SECTIONAL DOOR OR ONE-PIECE DOOR WITH TRACK A 2x4 laid flat is convenient for setting an ideal Rail door-to-rail distance. � Remove foam packaging. � Raise the opener onto a stepladder. You will need help at this point if the ladder is not tall enough. 2x4 is used to determine � Open the do
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INSTALLATION STEP 5 Hang the Opener To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to structural supports of the Three representative installations are shown. Yours may garage. Concrete anchors MUST be used if installing any be different. Hanging brackets should be angled (Figure 1) brackets into masonry. to provide rigid support. On finished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the opener
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LOCK LOCK LOCK LOCK LIGHT LIGHT INSTALLATION STEP 6 Install the Door Control To prevent possible SERIOUS INJURY or DEATH from electrocution: Locate door control within sight of door, at a minimum • Be sure power is not connected BEFORE installing door height of 5' (1.5 m) where small children cannot reach, control. away from moving parts of door and door hardware. If • Connect ONLY to 24 VOLT low voltage wires. installing into drywall, drill 5/32" holes and use the anchors To prevent possible S
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NOTICE INSTALLATION STEP 7 Install the Light To prevent possible OVERHEATING of the endpanel or light socket: � Press the release tabs on both sides of lens. Gently • DO NOT use short neck or specialty light bulbs. rotate lens back and downward until the lens hinge is in • DO NOT use halogen bulbs. Use ONLY incandescent. the fully open position. Do not remove the lens. To prevent damage to the opener: � Install up to a 100 watt maximum light bulb in each • DO NOT use bulbs larger than 100W. soc
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INSTALLATION STEP 9 Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the opener • Be sure power is not connected to the opener, and at this time. disconnect power to circuit BEFORE removing cover to To reduce the risk of electric shock, your garage door establish permanent wiring connection. opener has a grounding type plug with a third grounding • Garage door installation and wiring MUST be in complian
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INSTALLATION STEP 10 ® Install The Protector System Be sure power is not connected to the garage door opener BEFORE installing the safety reversing sensor. The safety reversing sensor must be connected and To prevent SERIOUS INJURY or DEATH from a closing garage aligned correctly before the garage door opener will door: move in the down direction. • Correctly connect and align the safety reversing sensor. This required safety device MUST NOT be disabled. IMPORTANT INFORMATION ABOUT THE SAFETY R
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INSTALLING THE BRACKETS Be sure power to the opener is disconnected. Install DOOR TRACK MOUNT (RIGHT SIDE) Figure 1 and align the brackets so the sensors will face each other across the garage door, with the beam no higher than 6" Door (15 cm) above the floor. They may be installed in one of Track three ways, as follows. Lip Garage door track installation (preferred) (Figure 1): Indicator Light � Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door
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MOUNTING AND WIRING THE SAFETY REVERSING Figure 5 SENSORS Wing Nut 1/4"-20 � Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor. Use wing nuts to fasten sensors to brackets, with lenses pointing toward each other across the door. Be sure the lens is not obstructed by a bracket Carriage Bolt extension (Figure 5). 1/4"-20x1/2" Lens � Finger tighten the wing nuts. • Run the wires from both sensors to the opener. Use TROUBLESHOOTING THE SAFETY REVERSING insulated staples to secure
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INSTALLATION STEP 11 Fasten the Door Bracket Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Follow instructions which apply to your door type as Contact your door manufacturer for reinforcement kit. illustrated below or on the following page. A horizontal reinforcement brace should be long enough to be secured to two or three vertical supports. A vertical reinforcement brace should cover Header the height of the top panel.
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ONE-PIECE DOORS Please read and comply with the warnings and reinforcement instructions on the previous page. They apply to one-piece doors also. � Center the door bracket on the top of the door, in line with the header bracket as shown. Mark either the left and right, or the top and bottom holes. � Metal Doors: Drill 3/16" pilot holes and fasten the bracket with the 1/4"-14x5/8" self-threading screws HARDWARE SHOWN provided. ACTUAL SIZE � Wood Doors: Drill 5/16" holes and use 5/16"x2" carriag
