LiftMaster GH GH -Mechanical New style w/ thermal overload change Manual - Page 4

Operator Specifications - nema 4

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OPERATOR SPECIFICATIONS MOTOR TYPE Continuous Duty HORSEPOWER 1/2, 3/4 or 1-1/2 HP 1 or 3 phase 2 HP 3 phase SPEED 1725 RPM VOLTAGE 115/220/230 1 phase 230/460/575V 3 phase CURRENT See Motor Nameplate ELECTRICAL TRANSFORMER 24 Vac CONTROL STATION NEMA 3-Button Station OPEN/CLOSE/STOP WIRING TYPE C2 (STANDARD) OPEN/CLOSE/STOP plus wiring for sensing device to reverse and auxiliary devices to open and close with open override. (Other types available. See chart, page 8) LIMIT ADJST: Linear driven, fully adjustable screw type cams. MECHANICAL DRIVE REDUCTION 40:1 Reduction Heavy duty bronze worm gear reducer OUTPUT SHAFT SPEED 43 RPM DOOR SPEED 4-10" per second depending on door BRAKE Solenoid actuated disc brake HOIST WHEEL Standard mounting on left or right side SAFETY DISCONNECT Floor level chain hoist with electrical interlock for emergency manual door operation. CLUTCH: (Optional Adjustable torque limiter type REVERSING EDGE (Optional): . . . Electric or pneumatic sensing device attached to the bottom edge of door. 4

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4
OPERATOR SPECIFICATIONS
SAFETY
DISCONNECT:
. . . . . . . . . .
Floor level chain hoist with electrical
interlock for emergency manual
door operation.
CLUTCH: (Optional)
. . . . . . . . . . . Adjustable torque limiter type
REVERSING EDGE (Optional):
. . . Electric or pneumatic sensing
device attached to the bottom edge of door.
MECHANICAL
DRIVE REDUCTION:
. . . . . . . . . . . . . . . . . . .
40:1 Reduction
Heavy duty bronze worm gear reducer
OUTPUT SHAFT SPEED:
. . . . . . . . . . . . . . . . . . . . . . . . . 43 RPM
DOOR SPEED:
. . . . . . . . . . .4-10" per second depending on door
BRAKE:
. . . . . . . . . . . . . . . . . . . . . . Solenoid actuated disc brake
HOIST WHEEL:
. . . . . . . . Standard mounting on left or right side
MOTOR
TYPE:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous Duty
HORSEPOWER:
. . . . . . . . . . . . . . . . . . . . . 1/2, 3/4 or 1-1/2 HP
1 or 3
phase
2 HP 3 phase
SPEED:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1725 RPM
VOLTAGE:
. . . . . . . . . . . . . . . . . . . . . . . . . .115/220/230 1 phase
230/460/575V
3 phase
CURRENT:
. . . . . . . . . . . . . . . . . . . . . . . . See Motor Nameplate
ELECTRICAL
TRANSFORMER:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Vac
CONTROL STATION:
. . . . . . . . . . . . . . . . .NEMA 3-Button Station
OPEN/CLOSE/STOP
WIRING TYPE:
. . . . . . . . . . . . . . . . . . . . . . . . . .C2 (STANDARD)
OPEN/CLOSE/STOP plus wiring for sensing device to reverse
and auxiliary devices to open and close with open override.
(Other types available. See chart, page 8)
LIMIT ADJST:
Linear driven, fully adjustable screw type cams.