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Gearhead (GH) style commercial door operators employ lubricated gears for heavy industrial, high cycle applications. GH-style operators include a floor level chain hoist to ease manual operation in an emergency or power outage. For left hand operators please add $28.00 to the cost.
SECURITY+ 2.0 RADIO RECEIVER - Standard on-board with Logic 5.0 operators. Accepts up to (90) single-button or (30) 3-Button remote controls plus up to (30) wireless keypads or an unlimited number of DIP switch remotes.
MOTOR - Continuous-duty high-starting torque motor with instant reverse and overload protection.
- Available in 1/2, 3/4, 1, 1-1/2, 2 and 3 HP; single- or three-phase.
- Capacitor start on single-phase.
- Removable without affecting limit switch settings
WIRING TYPE - Operators are factory preset to C2 wiring, providing momentary contact to open and stop, with constant contact to close.
- Monitored entrapment protection, using approved photo sensors or sensing edges is optional, although recommended, when using C2, D1 or E2.
- All other wiring types, B2, T, TS and FSTS can be selected with the addition of an appropriately monitored entrapment protection device (LiftMaster CPS-U photo eyes, LiftMaster OES monitored sensing edge, or a monitored sensing edge supported by the CPS-EI, as examples).
- Logic 5.0 operators can only accept UL-Approved LiftMaster monitored entrapment protection devices.
CONTROL CIRCUIT
DRIVE REDUCTION
- 45:1 first-stage using heavy-duty gears running in oil bath; cast iron housing.
- Special "all-climate"synthetic gear oil for greater low-temperature performance; #50 output sprocket chain.
BEARINGS
- Sealed roller bearings in gear reducer.
BRAKE
- Standard on all GH operators.
CONSTRUCTION
- NEMA 1 type electrical box, heavy-duty 11-gauge steel frame with durable powder coat finish, all reduction sprockets drilled and pinned to shafts.
WARRANTY
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Features
DUAL VOLTAGE CONNECTIONS
- Increase flexibility by enabling the installer to select the required voltage, within phase, to meet job-site requirements.
- Within phases, voltage is selectable at the time of installation with the placement of a connector.
FLOOR LEVEL CHAIN HOIST WITH ELECTRICAL INTERlock
- Provides easy disconnect and manual operation in an emergency.
HEAVY-DUTY WORM GEAR-IN-OIL GEAR REDUCER
- Delivers performance for heavy industrial, high cycle applications.
CONTROL FUNCTION SELECTOR DIAL
- Enables easy selection and programming of (7) wiring types, from constant pressure to close, to specialized Timer-to-Close functionality to meet end-user needs.
TIMER-TO-CLOSE
- Conveniently and confidently closes the commercial door automatically after a predetermined amount of time has elapsed for added security and peace of mind.
CONTINUOUS-DUTY HIGH-STARTING TORQUE MOTOR
- Performs in demanding industrial overhead and rolling door applications.
MOTOR REMOVABLE WITHOUT AFFECTING LIMIT SWITCH SETTINGS
- Saves time and money for maintenance.
MID-STOP
- Enables partial opening of door to a pre-programmed position for energy savings, time savings, and convenience.
MAXIMUM RUN TIMER
- Reverses or stops door if closing time exceeds expected time-frame to limit damage to door and operator.
DELAY-ON-REVERSE CIRCUIT
- Prevents abrupt reversal of door, reducing wear on the door and operator system.
3-BUTTON CONTROL STATION WITH MAINTENANCE ALERT SYSTEM (MAS)
- Provides open/close/stop functions and notification when routine maintenance is required.
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