Manaras OTH Heavy-Duty Commercial Trolley Operator

The Manaras OTH Heavy-Duty Commercial Trolley Operator is engineered for industrial and commercial applications, providing powerful and reliable operation of standard sectional doors. With a low headroom ceiling-mount design and UL325-2010 compliant electronic control board, this operator delivers safe, efficient, and dependable performance in demanding environments.

Built with a friction-type clutch for easy adjustment, a quick release disconnect arm for manual operation, and a rugged chain-and-sprocket drive system, the Manaras OTH is designed for long-lasting durability. All electrical components are housed in a NEMA 1-rated enclosure with a hinged cover, ensuring both safety and accessibility.

The Accu-Cam® feature allows quick, one-handed limit adjustments, while precision components such as oil-impregnated steel cams, bronze bushings, and ball bearings deliver smooth operation and extended service life.

Perfect for industrial facilities, this trolley-style garage door operator is ideal for doors up to 30 feet in height and offers multiple horsepower options for various door weights and sizes.

Key Features

• Heavy-duty commercial trolley operator for sectional doors

• Ceiling-mounted design with low headroom clearance (6.25")

• UL325-2010 compliant electronic control board

• Available in ½ HP, ¾ HP, and 1 HP continuous duty motors

• Friction-type clutch on input shaft, externally adjustable

• Quick release disconnect arm for manual push-up operation

• Accu-Cam® limits for fast, precise one-handed adjustments

• NEMA 1-rated enclosure with hinged cover for electrical components

• Ball bearing-supported shafts and bronze bushings for durability

• Baked enamel finish and chromate coating for corrosion resistance

• Includes color-coded 3-button control station

• Suitable for up to 25 cycles per hour / 80 cycles per day

Technical Specifications

• Supply Voltage: 115, 230 VAC single-phase; 208, 460, 575 VAC three-phase

• Control Voltage: 24 VAC, class 2 transformer, 2A fuse type ACG

• Motor Options: ½, ¾, 1 HP continuous duty

• Output Speed: 12 in./second (120 RPM output shaft)

• Drive System: 5L/B V-belt with #41 roller chain sprockets

• Track System: Dual 12-gauge galvanized tracks (standard for doors up to 12 ft; max 30 ft with optional extensions)

• Operator Weight: 71 lbs. (33 kg)

• Wiring Type: C2 (momentary contact to open/stop, constant pressure to close)

• Duty Cycle: 25 cycles/hour or 80 cycles/day

• Max Door Area (Guideline):

  • ½ HP: up to 392 sq. ft. (steel insulated)

  • ¾ HP: up to 549 sq. ft.

  • 1 HP: up to 613 sq. ft.