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General| Type | Chain Drive |
|---|---|
| Model Number | 139.53674SRT2 |
| Horsepower | 1/2 HP |
| Voltage | 120V |
| Frequency | 60 Hz |
| Remote Control Frequency | 315 MHz |
| Remote Controls Included | 2 |
| Safety Sensors | Yes |
| Battery Backup | No |
| Max Lift Power | 1/2 HP |
| Remote Control | Yes |
| Smart Home Compatibility | No |
| Drive System | Chain |
Details on installing the chain, cable, and securing the sprocket cover with safety warnings.
Instructions for tightening the chain and cable, with important notes on tension and warnings.
Guides users on finding the correct header bracket position for opener installation based on door type.
Details on power connection, grounding, and wiring compliance for safe opener operation.
Instructions for installing the safety sensor, a critical safety device for garage door openers.
Procedures for securely attaching the door bracket to sectional and one-piece garage doors.
Procedures for setting the door's upper and lower travel limits for proper opener operation.
How to set the opener's force to ensure safe opening and closing, preventing damage.
Crucial safety test to ensure the door reverses properly when encountering an obstruction.
How to use the wired door control buttons for opening, closing, and lighting features.
Steps to program remote controls and keyless entry systems to the garage door opener.
Lists and diagrams of parts for the opener's rail assembly, including trolley and chain.
Identifies various installation components like door controls, consoles, sensors, and wiring.
Details the internal components of the opener unit itself, such as motor, gears, and circuit boards.
