Chamberlain 1225E FS2 Manuale Utente

5

• Generally, a one-piece door does not require

reinforcement. If your door is lightweight, refer to
the information relating to sectional doors in
Installation Step 10.

• Depending on your door’s construction, you may

need additional mounting hardware for the door
bracket (Step 10).

Without a properly working safety reversal system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing garage
door.
• The gap between the bottom of the garage door and

the floor MUST NOT exceed 6 mm. Otherwise, the
safety reversal system may not work properly. 

• The floor or the garage door MUST be repaired to

eliminate the gap.

Safety
Reversing Sensor
(Optional Accessory)

FINISHED CEILING

Support bracket
& fastening
hardware is required.
See page 21.

Slack in Chain Tension
is Normal When
Garage Door is Closed

Safety
Reversing Sensor
(Optional Accessory)

Header
Wall

Access 
Door

Gap between floor and bottom
of door must not exceed 6 mm.

Motor Unit

Wall-mounted
Door 
Control

Access
Door

Gap between floor 
and bottom of door 
must not exceed 6 mm

Safety Reversing 
Sensor 
(Optional Accessory)

Wall-
Mounted
Door 
Control

Cable 
Pulley Bracket

Door
Bracket

Straight
Door
Arm

Trolley

Header
Wall

Rail

Garage
Door

Emergency Release
Rope & Handle

Chain

Header

Bracket

Curved

Door Arm

Safety Reversing 
Sensor
(Optional Accessory)

Chain

Pulley

Bracket

Header

Bracket

Trolley

Straight

Door

Arm

Manual

Release

Rope & Handle

Door Bracket

 

Garage

Door

Curved

Door

Arm

Garage

Door

Spring

Header

Wall

Chain