EHJW Jackshaft type electric door operator has been developed mainly for locations where atmospheres contain dust, oil, liquid vapours or water. Doors of either sectional overhead, vertical lift, high-lift, or rolling curtain construction are ideally suited for operation by this unit. Many other types of doors can be equipped with this operator, providing the door has a shaft as the basic driving element.
Three Button Control:
Momentary contact type for up, down, stop. Operator may be stopped in any position and door moved up or down from that position. Down button can be wired for constant pressure when specified. Control circuit 24V AC for users protection.
Rugged power unit of this operator utilises a large size V belt (5L) and heavy pulleys for primary reduction, roller chain and steel sprockets for secondary reduction to the output drive shaft. Pulleys and sprockets are mounted on 1″ (2.5cm) C.R. steel shaft rotating in high speed, precision, self-aligning pillow block bearings, for efficient long lasting hard working high traffic operation. Door operating speed approx. 1.0ft (.3m) per second.
Equipped with a disconnect device which allows a person to disengage the operator from the door and operate the chain hoist from the floor by hand in the event of power failure without having to remove the drive roller chain. Limit switches will not go out of adjustment when hoist is used. Also provides safety mechanical interlock to protect operator and door when power is restored, and if push button is pressed accidentally, the door will not move until disconnect lever is place to electric mode.
Solenoid Disc Brake:
To prevent door from coasting and secure locking of door in closed position.
Rotary type, friction free, oilite bronze cams and precision micro switches for automatic stopping of door in up and down positions, easily adjustable without tools.
Heavy duty type.
Right or left side.
Manual Overload Relay:
For overcurrent and under voltage protection (can be reset manually).
1/3 HP (248.6W), 1/2 HP (373W), 3/4 HP (559.5W), 1 HP (746W) 120V or 240V single phase, 208V, 230V, 416V, 460V or 600V three phase. 1 HP (746W) not recommended on single phase motors.
20″ (50cm) minimum.
Primed with rust-proof primer and spray painted in blue hammertone enamel.