Features Of Your Opener; Specifications - Chamberlain 550 Owner's Manual

FEATURES OF YOUR OPENER

1. Opener Lights: Turn on and off automatically with 4-1/2
minute illumination for your safety and convenience. Provide
constant LIGHT when Light Switch is ON.
2. Safety System: Independent up and down force adjustment.
The door REVERSES automatically when obstructed in DOWN
direction. The door STOPS when obstructed in UP direction.
3. Emergency Disconnect: Pull cord disconnect permits manual
door operation.
4. Automatic Reconnect: Trolley halves reconnect for automatic
operation when opener is energized after emergency disconnect.

SPECIFICATIONS

Type ........................................Permanent split capacitor
Speed......................................1500 rpm
Volts........................................120 Volts AC - 60 Hz. Only
Current....................................4.5 amperes
DRIVE MECHANISM
Gears ......................................16:1 worm gear reduction
Drive........................................Roller chain with two-piece trolley on
Length of travel........................Adjustable to 7 1/2 feet
Travel rate ..............................6 to 8 inches per second
Lamp .......................................On when door starts to travel, off 4 1/2
Door linkage ............................Adjustable door arm. Pull cord
MOTOR
steel Tee-rail.
minutes after stop. Also separate
LIGHT Switch.
trolley release.
5. Motor Power: Permanently lubricated motor with automatic
reset.
6. Digital Radio Controls: Codes can be easily changed by the
owner.
7. Easy Limit Adjustment: Limits of door opening and closing
adjusted by turning screws without removing chassis cover.
8. Lock Switch: Prevents operation of opener from transmitter.
When LOCK Switch is ON, the opener can be operated in the
UP direction ONLY, from the Wall Control or optional Key
Switch and Keyless Entry accessories, (See below).
Personal..................................Push button and automatic reversal in
Electronic................................Independent UP and DOWN force
Electrical .................................Motor overload protector & low voltage
Limit device.............................Circuit actuated by limit nut
Limit Adjustment .....................Screwdriver adjustment on side panel
Start circuit .............................Low voltage push button or radio
Length (overall) .......................128 inches
Headroom required .................2 inches
Hanging weight .......................32 pounds
4
SAFETY
down direction. Push button and
Automatic stop in UP direction.
adjustment screws.
push button wiring.
control.
DIMENSIONS