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Chamberlain M150 1/2 HP Owner's Manual

1/2 hp for residential use only


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
Periodic checks of the opener are required to ensure safe operation.
The model number label is located on the back of your opener.
Garage Door Opener
Model M150
1/2 HP
For Residential Use Only
Owner's Manual
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
Complies with UL 325
regulations effective
January 1, 1993
is connected and properly


Table of Contents

Summary of Contents for Chamberlain M150 1/2 HP

  • Page 1 The Chamberlain Group, Inc. A DUCHOSSOIS ENTERPRISE 845 Larch Avenue Elmhurst, Illinois 60126-1196 Complies with UL 325 regulations effective January 1, 1993 ® Garage Door Opener Model M150 1/2 HP 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.
  • Page 2: Table Of Contents

    Contents Safety alert symbol review ...........2 Install the lights and lens ..........19 Safety information and precautions ......3 Attach the manual release rope and handle....19 Testing your garage door for binding & balance ..3 Fasten the door bracket (sectional door)....20 Hardware supplied ............3 Fasten the door bracket (one-piece door)....21 Carton inventory ............4 Connect door arm to trolley (sectional door)....22...
  • Page 3: Safety Information And Precautions

    Safety Information and Precautions WARNING CAUTION CAUTION An unbalanced garage door might not reverse when To avoid damage to the garage door and opener, disable locks before installing and operating the opener. Use a required and someone under the door could be seriously injured or killed.
  • Page 4: Carton Inventory

    Carton Inventory Your garage door opener is packaged in two cartons which contain the power unit and parts illustrated below. Accessories will depend on model purchased. If anything is missing, carefully check the packing material. Parts may be "stuck" in the foam. KEEP THE FOAM INTACT (see page 6). Hardware is listed on page 3. LO CK LIG HT Sprocket Coupling...
  • Page 5: Illustration Of Sectional Door Installation

    Before you begin, survey your garage area to see whether any of the conditions below apply to your installation. SECTIONAL Door or ONE-PIECE Door with Track Installation FINISHED CEILING Support bracket & fastening hardware is required. Horizontal and vertical reinforcement See page 13.
  • Page 6: Assembly Section: Pages

    Assembly Section: Pages 6 - 7 ASSEMBLY STEP 1 Fasten the Rail To the Power Unit NOTE: To aid in assembly and installation, replace the foam packing around the power unit. Remove it after Installation Step 5. • Working on a level surface, align the rail assembly with the power unit, as shown.
  • Page 7: Attach The Rail Brackets

    ASSEMBLY STEP 3 Attach the Rail Brackets 1/4"-20 • Align rail brackets to end of rail assembly, as shown. Rail Lock Nuts Brackets • Insert two 1/4"-20 x 5/8" hex screws and lock nuts. Tighten securely with a 7/16" socket. Hardware Shown Actual Size 1/4"...
  • Page 8: Installation Section: Pages

    Installation Section: Pages 8 – 23 Installation Step 1 WARNING Determine Header Bracket Location If the header bracket is not rigidly fastened to a Installation procedures vary according to garage structural support on the header wall or ceiling, the door types. Follow the instructions which apply to safety reverse system may not work properly (see page your door.
  • Page 9: One-Piece Door

    ONE-PIECE Door Without Track Read the Safety Instructions on page 8. They also apply to doors without tracks. Unfinished • Close the door and mark the inside Header Wall Ceiling Vertical vertical centerline of your garage Centerline door. Extend the line onto the header wall above door.
  • Page 10: Install The Header Bracket

    You can attach the header bracket either to the wall Installation Step 2 above the garage door, or to the ceiling. Follow the instructions which will work best for your particular Install the Header Bracket requirements. Fastening the Header Bracket to the Ceiling Fastening the Header Bracket to the Wall •...
  • Page 11: Attach The Rail To The Header Bracket

    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. If the door spring is in the way you’ll need help. Have someone hold the opener securely on a temporary support to allow the rail to clear the spring.
  • Page 12: The Protector System

    The Protector System ® Information you'll need before you begin the installation of the safety reversing sensor The safety reversing sensor must be connected and aligned correctly before the garage door opener will WARNING move in the down direction. This is a required safety device and cannot be disabled.
  • Page 13: Install The Safety Reversing Sensor

    Figure 1 Installation Step 4 Garage WALL or DOOR TRACK Installation Install the Safety Reversing Sensor (Receiving and Sending Eyes) Mounting Bracket With Square Holes "C" Wrap #10-32x3/8" Figures 1, 2 and 3 show recommended assembly of Screws bracket(s) and "C" wrap based on the wall installation of #10 - 32 Lock Nuts the sensors on each side of the garage door as shown on...
  • Page 14 Installation Step 4 (Continued) Install the Safety Reversing Sensor 7. Center each sensor unit in a “C”- wrap with lenses Wing "C" Wrap pointing toward each other across the door (see Figure 6). 8. Secure sensors with the hardware shown. Finger Indicator Light tighten the wing nut on the receiving eye to allow for...
  • Page 15: Position The Opener

    Installation Step 5 CAUTION CAUTION Position the Opener To prevent damage to steel, aluminum, fiberglass or Follow instructions which apply to your door glass panel doors, do not rest the opener on the door type as illustrated. without using a 2x4. SECTIONAL Door or ONE-PIECE Door with Track A 2x4 laid flat is convenient for setting an ideal door-...
  • Page 16: Hang The Opener

    Installation Step 6 WARNING Hang the Opener The opener could fall and injure someone if it is not properly secured. Fasten the opener securely to structural supports of the garage. Two representative installations are shown. Yours may be different. Hanging brackets should be angled, Figure 1, to provide rigid support.
  • Page 17: Install The Door Control And Connect All Wires

    Installation Step 7 WARNING Install the Door Control and Connect all Wiring Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause serious injury or death. Install the door Install Door Control control (or any additional push buttons) out of the reach Locate the door control within sight of the door at a...
  • Page 18: Electrical Requirements

    Installation Step 8 WARNING Electrical Requirements To prevent electrocution or fire, installation and wiring must be in compliance with local electrical and building To reduce the risk of electric shock, your garage door codes. opener has a grounding type plug with a third grounding Do NOT use an extension cord, 2-wire adapter, or change pin.
  • Page 19: Install The Lights And Lens

    Installation Step 10 Install the Lights and Lens 100 Watt Max. Light Bulb • Install a 100 watt maximum light bulb in each socket. The lights will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Top Lens Slot Then the lights will turn OFF.
  • Page 20: Fasten The Door Bracket (Sectional Door)

    Installation Step 12 CAUTION CAUTION Fasten Door Bracket To prevent damage to steel, aluminum, fiberglass or Follow instructions which apply to your door type glass panel doors, always reinforce the inside of the door as illustrated below or on page 21. both vertically and horizontally with an angle iron.
  • Page 21: Fasten The Door Bracket (One-Piece Door)

    All ONE-PIECE Door Installation Procedure Please read and comply with the warnings and reinforcement instructions on page 20. They apply to one-piece doors also. Header Wall Finished Ceiling 2x4 Support Horizontal and vertical Header reinforcement is needed for Bracket lightweight garage doors Door (fiberglass, aluminum, steel, Bracket...
  • Page 22: Connect Door Arm To Trolley (Sectional Door)

    Installation Step 13 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on page 23. SECTIONAL Doors Only Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley.
  • Page 23: Connect Door Arm To Trolley (One-Piece Door)

    All ONE-PIECE Doors Assemble the Door Arm: Ring • Fasten the straight and curved door arm sections Door Fastener Bracket together to the longest possible length (with a 2 or 3 Nuts Lock hole overlap). 5/16"-18 Washers 5/16" • With the door closed, connect the straight door arm Clevis Pin Straight section to the door bracket with the 5/16"x1-1/4"...
  • Page 24: Adjustment Section: Pages

    Adjustment Section: Pages 24 – 26 Adjustment Step 1 WARNING Adjust the UP and DOWN Limits Improper adjustment of the travel limits will interfere with Do not make any limit adjustments until the safety the proper operation of the safety reverse system. The reversing sensors are completely installed.
  • Page 25: Force Adjustments

    Adjustment Step 2 WARNING Adjust the Force Too much force on the door will interfere with the proper operation of the safety reverse system. The door might Force adjustment controls are located on the right panel not reverse properly when required and could seriously of the opener.
  • Page 26: Test The Protector System

    Adjustment Step 3 WARNING Test The Protector System ® Without a properly working safety reversing sensor, persons (particularly children) could be seriously injured • Press the remote control push button to open the door. or killed if trapped by a closing garage door. Repeat this •...
  • Page 27: Operation Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS WARNING WARNING To reduce the risk of severe injury or death to persons: 1. READ AND FOLLOW ALL INSTRUCTIONS. 2. Do not permit children either to operate or to play with the opener. Keep remote control in a location inaccessible to children.
  • Page 28: Operation Of Your Opener

    Operation of Your Opener Activate the opener with any of the following: WARNING • The Remote Control Transmitter. Hold push button down until the door starts to move. • The Door Control. Hold push bar down until the door starts Weak or broken springs could allow an open door to fall to move.
  • Page 29: Receiver & Remote Control Programming

    Receiver & Remote Control Programming NOTICE: To comply with FCC rules, adjustment or modification of this receiver and/or transmitter are prohibited, except for changing the code WARNING setting or replacing the transmitter battery. THERE ARE NO OTHER USER SERVICEABLE PARTS. Children operating or playing with a garage door opener SECURITY can injure themselves or others.
  • Page 30: Having A Problem

    Having a Problem? Situation Probable Cause & Solution The opener doesn't 1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the operate from either fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.) the door control or 2.
  • Page 31 Having a Problem? (continued) Situation Probable Cause & Solution The door opens but 1. If the opener lights blink, check the safety reversing sensor. See page 18. won't close: 2. If the opener lights do not blink and it is a new installation, check the down force. See Adjustment Step 2, page 25.
  • Page 32: Repair Parts, Rail Assembly

    Repair Parts Rail Assembly Parts PART DESCRIPTION 41A4795 Hardware bag (Includes sprocket coupling) 12B569-1 Left rail bracket 12B569-2 Right rail bracket 81C168 Rack 41C4677 Complete trolley assembly 1D4828-1 One-piece T-rail 41A4836 Drive sprocket kit 25A18 Sprocket coupling Installation Parts LO CK LIG HT PART DESCRIPTION...
  • Page 33: Repair Parts, Power Unit

    Repair Parts Power Unit Parts (Down) ew Drive LIMIT SWITCH ASSY. Brown Contact Wire Grey Wire Drive Gear Center Limit (Up) Yellow Contact Contact Wire KEY PART PART DESCRIPTION DESCRIPTION 31D426 Drive shaft cover 41A4843 Interrupter cup 41B4245 Line cord 41A4837 Worm gear and retainer 30B363...
  • Page 34: Accessories

    Accessories Available For Your Opener SECURITY Single-Function Model 1702 Outside Quick Release Model 971AC Remote Control Required for a garage with NO access door. Enables homeowner to open Includes visor clip. garage door manually from outside by disengaging trolley. Model 972AC SECURITY 2-Channel Outside Keylock Model 59...
  • Page 35: Index

    Index Access Door/Outside Quick Release Accessory ......................31, 34 Electrical Safety Warnings ............................7, 18, 27 Garage Door Testing for balance, binding and sticking.........................3, 24, 27 Determining high point of travel: Sectional door..................................8 One-piece door ..................................9 Disabling existing locks ..............................3, 7 Force controls Adjustment procedures..............................25 Problems that might require force adjustments......................30, 31 Safety warnings .................................25, 27...
  • Page 36: How To Order Repair Parts

    ACCESS MASTER GARAGE DOOR OPENER ONE-YEAR LIMITED WARRANTY Access Master/Chamberlain (“Seller”) warrants to the first retail purchaser of this product that it is free from defect in materials and/or workmanship for a period of one year from the date of purchase. The proper operation of this product is dependent on your compliance with the Owner’s Manual instructions regarding installation,...

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