Chamberlain HD150DM 1/3 HP, HD175DM 1/2 HP Introduction, Assembly, Adjustment, Operation, Installation, Programming, Repair Parts, Accessories, Repair Parts and Service, Warranty, Safety Symbol

TABLE OF CONTENTS
Introduction	2-7
Safety symbol and signal word review.............................	2
Preparing your garage door .............................................	3
Tools needed....................................................................	3
Planning ......................................................................	4-5
Carton inventory ...............................................................	6
Hardware inventory ..........................................................	7
Assembly	8-11
Assemble the rail and install the trolley............................	8
Fasten the rail to the motor unit .......................................	9
Install the idler pulley........................................................	9
Install the chain/cable.....................................................	10
Tighten the chain............................................................	11

Adjustment	27-29
Adjust the travel limits ....................................................	27
Adjust the force ..............................................................	28
Test the safety reversal system .....................................	29
Test The Protector System®...........................................	29
Operation	30-34
Operation safety instructions..........................................	30
Using your garage door opener .....................................	30
Using the wall-mounted Door Control ............................	31
To open the door manually ............................................	31
Care of your garage door opener...................................	32
Having a problem? .........................................................	33
Diagnostic chart..............................................................	34

Installation	11-26	Programming	35-36
Installation safety instructions ........................................	11	To add or reprogram a hand-held remote control	..........35
Determine the header bracket location ..........................	12	To erase all codes..........................................................	35
Install the header bracket...............................................	13	3-Button Remotes ..........................................................	35
Attach the rail to the header bracket ..............................	14	To add, reprogram or change
Position the opener ........................................................	15	a Keyless Entry PIN .......................................................	36
Hang the opener.............................................................	16	Repair Parts	37-38
Install the door control....................................................	17	Rail assembly parts ........................................................	37
Install the light and lens..................................................	18	Installation parts .............................................................	37
Attach the emergency release rope and handle ............	18	Motor unit assembly parts ..............................................	38
Electrical requirements...................................................	19	Accessories	39
Install The Protector System® ..................................	20-22
		Repair Parts and Service	40
Fasten the door bracket ...........................................	23-24
Connect the door arm to the trolley..........................	25-26	Warranty	40

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 strict accordance with the instructions and warnings contained in this manual.

Mechanical

When you see these Safety Symbols and Signal Words on the following pages, they will alert you to the possibility of serious injury or death if you do not comply with the warnings that accompany them. The hazard may come from something mechanical or from electric shock. Read the warnings carefully.

Electrical

When you see this Signal Word on the following pages, it will alert you to the possibility of damage to your garage door and/or the garage door opener if you do not comply with the cautionary statements that accompany it. Read them carefully.

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