Three button control:
Momentary contact type for up, down and stop. Operator may be stopped in any position and door moved up or down from that position. Operator can be wired for constant pressure down when specified. Control circuit 24V. A.C. for user’s protection.
Screw type with oilite bronze cams and precision type micro switches for both up and down stopping of door positions. Easily adjustable without tools.
Heavy duty type, STRUTHERS-DUNN or equal.
Electro mechanical stop:
This built-in door stop, load sensing device is standard equipment, if downward travelling door meets an obstruction, door will instantly stop. Easily accessible. Externally adjustable without tools. Operators with three phase motor can be made to instant reverse at no extra cost. This operator is also available with instant reverse mechanism for single phase motors. (OPTIONAL AT EXTRA COST)
The power unit of this operator utilizes V belt and pulleys for primary reduction, roller chain and sprocket for secondary reduction to the output drive shaft. Rotating on high speed ballbearings and self-lubricating, self-aligning pillow block bearings for efficient long lasting, quiet operation. Door operating speed approx. 1.0ft. (.3m) per second.
Quick release door arm:
Quickly disengages operator from door (without tools) for manual operation in the event of power failure.
Cast aluminium alloy chain driven carriage, slides on dual heavy steel angle tracks, with full No. 65 push and pull roller chain, for smooth and quiet operation. In addition a roller spreader is provided to support trolley and prevent chains from rubbing.
1/3 H.P. (.33hp), 1/2 H.P. (.5hp), or 3/4 H.P. (.75hp), 115V., or 230V., 1 phase – 208V., 440V. or 550V., 3 phase. This operator has an overload and under voltage protection.
To prevent door from coasting and holding in any position.
2-1/2″ (62.5cm) from door’s highest arc of travel.
4’7″ (137.5cm) plus door height.
Primed with rust-proof primer and spray painted in blue hammer tone enamel.