Chamberlain 1280 - 1/2 HP Page, Contents, Contents, Mechanical, Electrical, serious injury or death, Assembly section - pages 6 –, Adjustment section

Contents	Page
A review of safety alert symbols .............................	2
Safety information regarding garage door locks
and ropes..............................................................	3
Testing your garage door for sticking, binding
and balance ..........................................................	3
Illustration of sectional door installation .................	4
Illustration of one-piece door installation ...............	4
Carton inventory .....................................................	5
Assembly section - pages 6 – 7
Fasten T-rail to opener .........................................	6
Tighten the belt.....................................................	6
Attach belt cap retainer.........................................	7
Installation safety instructions...............................	7
Installation section - pages 8 – 23
Determine header bracket location
Sectional door.....................................................	8
One-piece door...................................................	9
Install the header bracket ...................................	10
Attach the T-rail to header bracket .....................	11
Position the opener.............................................	12
Hang the opener.................................................	13
Install the multi-function door control panel ........	14
Install the lights and lenses ................................	15
Attach manual release rope and handle.............	15
Electrical requirements .......................................	16

Contents	Page
The Protector® System
safety reversing sensor information.................	17
Install the safety reversing sensor .................	18,19
Fasten door bracket (sectional door)..................	20
Fasten door bracket (one-piece door) ................	21
Connect door arm to trolley (sectional door) ......	22
Connect door arm to trolley (one-piece door).....23
Adjustment section - pages 24 – 26
Travel limit adjustments......................................	24
Force adjustments ..............................................	25
Test The Protector® System ..............................	26
Test the safety reverse system ..........................	26
Operation safety instructions ................................	27
Care of your opener..............................................	27
Maintenance schedule..........................................	27
Operation of your opener......................................	28
Receiver & remote control programming..............	29
Having a problem? .........................................	30, 31
Repair parts, rail assembly ...................................	32
Repair parts, installation .......................................	32
Repair parts, opener assembly.............................	33
Accessories ..........................................................	34
Index.....................................................................	35
How to order repair parts......................................	36
Warranty ...............................................................	36

Start by reviewing these important safety alert symbols

When you see these safety symbols on the following pages, they will alert you to the possibility of serious injury or death if you do not comply with the corresponding instructions. The hazard may come from something mechanical or from electric shock. Read the instructions carefully.

WARNING	WARNING
Mechanical	Electrical

When you see this Safety Symbol 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 corresponding instructions. Read the instructions carefully.

CAUTION

This garage door opener is designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the safety instructions contained in this manual.