Chamberlain 3255-2M 1/2 HP Manuale Utente

5

Your garage door opener is packaged in two cartons 

which contain the motor unit and all parts illustrated 

below. Accessories will depend on the model purchased.

If anything is missing, carefully check the packing 

material. Parts may be stuck in the foam. Hardware for 

installation is also listed below. 

Straight Door
Arm Section

Curved Door
Arm Section

Safety Labels

and

Literature

Header Bracket

UP

CEILIN

G MOU

NT ON

LY

Sprocket Cover

2 Conductor Bell Wire
White & White/Red

Motor Unit with Light Lens

Remote Control
Visor Clip

Door Bracket

Multi-Function
Door Control Panel

LOCK

LIGHT

 The Protector System

®

(2) Safety Reversing Sensors
(1 Sending Eye and 1 Receiving Eye)
with 2-Conductor White & White/Black
Bell Wire attached 

Safety Sensor
Bracket (2)

One-Piece
Rail

Styrofoam

Chain
Pulley Bracket

Trolley

Chain

SECURITY

✚

®

Single-Button Remote Control

INSTALLATION HARDWARE
Hex Bolt 5/16"-18x7/8" (4)
Lag Screw 5/16"-9x1-5/8" (2)
Lag Screw 5/16"-18x1-7/8" (2)
Clevis Pin 5/16"x2-3/4" (1)
Clevis Pin 5/16"x1-1/4" (1)
Clevis Pin 5/16"x1" (1)
Nut 5/16"-18 (4)
Lock Washer 5/16" (4)
Screw 6ABx1-1/4" (2)
Screw 6-32x1" (2)
Self-Threading Screw 1/4"-14x5/8" (2) 

Insulated Staples (30)
Ring Fastener (3)
Drywall Anchors (2)
Rail Grease
Carriage Bolt 1/4"-20x1/2" (2)
Wing Nut 1/4"-20 (2)
Rope
Handle

Models 3245M, 3255M (1)
Model 3255-2M (2)