Model ETHW waterproof, dust-tight, trolley-type electric door operator has been developed primarily for car-wash applications or any other location where the atmosphere contains dust, oil, liquid vapours or water. Suitable for standard lift sectional overhead doors.
Three Button Control:
Momentary contact type for open, close, stop. May be stopped in any position and door moved up or down from that position. Close button can be wired for constant pressure when specified. Control circuit 24V AC Class II for user’s protection.
Adjustable Friction Clutch:
Will protect door and operator in case of obstruction.
Rotary type with “oilite” bronze cams and precision micro switches for automatic stopping in open and closed positions. Easily adjustable without tools.
Heavy duty type.
The power unit of this operator utilizes a large V-belt (5L) and heavy pulleys for primary reduction; roller chain and steel sprockets for secondary reduction to the output drive shaft. Mounted on 1″ (2.5cm) C.R. steel shaft, rotating on high speed self-lubricating, self-aligning pillow-block bearings for efficient, long lasting, hard-working, high-traffic operation. Door operating speed approx. 1.0 ft (.3m) per second.
Cast aluminium alloy chain driven carriage, slides in a dual heavy steel angle tracks, with continuous No. 41 push and pull roller chain for smooth and quiet operation. In addition, a roller spreader is provided to support trolley and prevent chain from rubbing.
Quick Release Door Arm:
Quickly disengages operator from door (without tools) for manual operation in the event of power failure.
1/3 H.P. (249W), 1/2 H.P. (373W), 3/4 H.P. (560W) or 1 H.P. (746W), 115V. or 230V., 1 phase, 208V., 230V., 416V., 460V. or 550V., 3 phase. 1 H.P. (746W) not recommended for single phase motors.
Manual Overload Relay:
For over-current and under voltage protection. Manual reset.
2-1/2″ (6.35cm) minimum from door’s highest arc of travel.
4’7″ (140cm) plus door height.
Primed with rust-proof primer and spray painted in blue hammer-tone enamel.