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Chamberlain Merlin Whisper Drive MT3850 User Manual

Chamberlain Merlin Whisper Drive MT3850
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MT3850
Sectional Garage Door Opener
INSTALLATION AND OPERATING INSTRUCTIONS
Owner’s Copy: Keep these Instruction for Future Reference.
Please read this manual and the enclosed safety materials carefully!
Periodic checks of the opener are required to ensure safe operation.
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Chamberlain Merlin Whisper Drive MT3850 Specifications

General IconGeneral
Drive SystemBelt Drive
Battery BackupNo
Power120V AC
Max Door Height3.5 m
Speed7 inches per second
Remote Controls Included2
Safety FeaturesAuto-reverse, photoelectric sensors
Smart FeaturesMyQ Compatibility (Requires additional MyQ accessories)
Smartphone ControlYes

Summary

Important Safety Instructions

Preparing Your Garage Door

Tools Needed for Installation

List of hand tools required for assembly, installation, and adjustment of the opener.

Planning Your Installation

Sectional Door Installation Guide

Diagram showing header wall, ceiling, door, and opener mounting for sectional doors.

One-Piece Tilt Door with Track Installation

Diagram showing mounting for one-piece tilt doors with tracks.

One-Piece Tilt Door without Track Installation

Diagram showing mounting for one-piece tilt doors without tracks.

Carton Contents Overview

Opener Carton Components

List and images of components included in the opener carton.

Rail Carton Components

List and images of components included in the rail cartons.

Assembly Steps

Assemble Sectional Rail

Instructions for assembling the sectional rail sections securely.

Install the Drive Belt

Steps to properly hook the trolley connector into the inner trolley assembly.

Insert Belt into Rail Assembly

Guide to sliding the pulley bracket and inner trolley into the rail assembly.

Assemble Header Sleeve

Steps for assembling the header sleeve assembly onto the rail.

Attach Trolley to Rail Assembly

Procedure for sliding the outer trolley into the rail assembly.

Attach Rail to Opener Unit

Instructions for securely fastening the rail assembly to the opener.

Set Belt Tension Correctly

Guide to setting the correct belt tension using spring nut and screwdriver.

Attach Belt Pulley Cover

Steps to position and attach the belt pulley cover with hex screws.

Installation Procedures

Determine Header Bracket Location

Guidance on finding the correct header bracket position for various door types.

Install the Header Bracket

Instructions for mounting the header bracket using wall or ceiling mount methods.

Attach Rail to Header Bracket

Procedure for connecting the rail to the header bracket using clevis pins.

Position the Garage Door Opener

Instructions for positioning the opener based on door type using timber spacers.

Hang the Garage Door Opener

Steps for securely hanging the opener to structural supports using brackets.

Fasten the Door Bracket

Instructions for attaching the door bracket to sectional and tilt doors.

Connect Door Arm to Trolley

Procedure for connecting the door arm sections to the trolley and door bracket.

Install C198 LCD Motion Detecting Control

Guide to wiring and mounting the LCD motion detecting control panel.

Install The Protector System™

Steps for installing the safety reversing sensors (IR beams) on the opener.

Install the Opener Lights

Instructions for installing the light bulbs and lenses into the opener.

Attach Emergency Release Rope and Handle

Procedure for threading and attaching the emergency release rope and handle.

Install the Battery Backup

Guide to installing the battery backup unit into the opener.

Adjustment Procedures

Program Travel Limits

Steps to set the desired open and closed positions for the garage door.

Set Door Force Adjustment

Procedure to adjust the force required for opening and closing the door.

Test Safety Reversal System

Procedure for testing the safety reversal system with a 40mm obstacle.

Using the C198 LCD Motion Detecting Control

Light Feature Operation

Instructions for operating the opener light using the Light button.

Lock Feature Control

Guide to activating and deactivating the lock feature on the control panel.

Motion Detecting Light Feature

Details on how the motion sensor activates the opener light automatically.

Learn Feature for Remotes

Instructions for programming remote controls using the LEARN button.

Language and Temperature Settings

How to toggle language and temperature units on the control panel.

Automatic Close Timer Setup

Instructions for enabling and disabling the automatic close timer feature.

Wireless Programming Guide

Add or Reprogram Hand-held Remote

Steps to program or reprogram remote controls using the learn button or control panel.

Erase All Opener Memory Codes

Procedure to erase all previously programmed remote control codes.

Keyless Device Programming

Instructions for programming keypads and fingerprint entry systems.

Program C840 Keypad

Steps to program the C840 Keyless Entry System using the learn button.

Program Keyless Entry via C198 Control

Method to program keyless entry using the C198 control panel.

Program C379 Fingerprint Entry System

Instructions for programming the C379 Fingerprint Entry System.

Troubleshooting with Onboard Diagnostics

1 Flash: Sensor Wire Open or Disconnected

Troubleshooting for safety reversing sensor wire issues causing 1 flash.

2 Flashes: Sensor Wire Shorted or Reversed

Troubleshooting for safety reversing sensor wire shorts or polarity reversal.

3 Flashes: Control Console or Wire Shorted

Troubleshooting for a shorted control console or wiring causing no LCD display.

4 Flashes: Sensor Misalignment (Dim/Flashing LED)

Troubleshooting for misaligned safety reversing sensors indicated by dim or flashing LEDs.

5 Flashes: RPM Sensor Failure (Short Travel)

Troubleshooting for RPM sensor failure indicated by short travel.

General Troubleshooting Guide

Opener Not Operating (Control/Remote)

Troubleshooting steps for opener not responding to controls or remotes.

LCD Control Not Operating

Troubleshooting for issues with the LCD motion detecting control panel.

Remote Control Not Working

Troubleshooting steps when remotes are not working but the control works.

Short Remote Control Range

Tips for improving short range performance of remote controls.

Door Reverses Unexpectedly

Troubleshooting door reversing unexpectedly with flashing opener light.

Door Opens and Closes Itself

Steps to ensure remote push buttons are not stuck 'on'.

Door Stops Before Fully Closing

Guidance on re-setting limits and forces for complete door closure.

Door Opens But Won't Close

Troubleshooting steps for the door not closing fully.

Opener Lights Not Turning On

Steps to check for power issues or replace light bulbs.

Opener Straining or Humming

Troubleshooting opener strain due to unbalanced door or broken springs.

Opener Won't Activate (Power Failure)

Steps to take when the opener is not activated due to power failure.

Manually Setting Travel Limits

Detailed steps for manually setting door travel limits.

Replacement Parts List

Opener Assembly Parts

Available Accessories

Using Your Garage Door Opener

Manual Door Operation

Procedure for manually opening and closing the door using the release handle.

Opener Operation with Controls

Describes opener actions when activated by remote or LCD control.

Opener Light Behavior

Details on when the opener lights automatically turn on and their behavior.

Caring for Your Opener

Monthly Maintenance Schedule

Recommended monthly maintenance tasks for the opener.

Yearly Maintenance Schedule

Recommended yearly maintenance tasks for the opener.

Chamberlain Limited Warranty

Australian Liability Terms

Details on seller's liability for damages and implied terms in Australia.

New Zealand Liability Terms

Details on seller's liability for damages and implied terms in New Zealand.

Customer Contact Details

Contact information for Chamberlain service centres in Australia and New Zealand.

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