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.
Adjustable automatic friction clutch:
Will protect door and operator in case of obstruction.
Limit switches:
Screw type with oilite bronze cams and precision micro switches for both up and down automatic stopping of door positions. (Easily adjustable without tools).
Reversing contactor:
Heavy duty type STRUTHERS-DUNN or equal.
Reduction system:
The power unit of this operator utilizes 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, 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. 1.0ft. (.3m) per second.
Dual trolley:
Cast aluminium alloy chain driven carriage, slides on dual heavy steel angle tracks, with full 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.
Motor:
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. (1 H.P. not recommended on single phase motors).
Manual overload relay:
For overload and under voltage protection. (Can be reset manually).
Electro-mechanical instant reverse or stop:
This built-in door load sensing device is optional equipment (at extra cost). If downward travelling door meets an obstruction, door will instantly reverse and automatically stop at fully open position or, when specified, can be wired to door stop only. This system eliminates the use of air hose, air switch, retractable cord, etc.
Solenoid brake:
To prevent door from coasting and holding in any position.
Headroom required:
2-1/2″ (62.5cm) minimum from door’s highest arc of travel.
Backroom:
4’7″ (137.5cm) plus door height.
Finish:
Primed with rust-proof primer and spray painted in blue hammer tone enamel.
Three-button control post:
Momentary contact type, open, close, fully protected for normal use, 600V. A.C. maximum. Screw type terminals. 24V. A.C. control circuit for user protection.
Motor Control:
High power reversing contactor STRUTHERS-DUNN or equivalent. Two sets of triple-pole contactors on common armature, mechanically interlocked to prevent simultaneous closure, flapper armature with triangular suspension, DPDT auxiliary contacts on each armature, 24V. A.C. coils, resistivity 120V. A.C. 15 amp., 240V. A.C. 10 amp., 550V. A.C. 5 amp. Motor 1 C.V. maximum. Terminals .250″ (.625cm) quick connect, durability 10 million cycles.
Automatic and adjustable friction clutch:
4″ (10cm) diameter aluminium disk, attached to the rotary shaft, covered on one side with a 4″ x 1/8″ (10cm x .31cm) piece of non-flammable fibrous material for clutch lining, compressed by means of a powerful compression spring and a knurled nut threaded on an 8″ (20cm) pulley with V-belt. Securely held by a 3/16″ (4.8mm) pin. The clutch system can easily be adjusted to the size and weight of the door. The friction clutch protects the door and the operator in case of obstruction.
Electrical control box:
Factory pre-connected, profiled box in 14 gauge hot rolled steel, measuring 8″ x 10″ x 4-1/2″ (20cm x 25cm x 11.25cm) with removable cover for easy service and maintenance. Mounted on the chassis by means of 4 galvanized steel bolts.
Tolerance contactors:
Screw type with two grooved bronze “oilite” cams, guided by a profiled galvanized steel plate. The cams are mounted on a 5/8″ x 10-3/4″ (2.05cm x 26.88cm) threaded shaft of cold rolled steel N/F, rotating on lubricated ball bearings. The cams, when pivoting, activate two micro-contactors that cut off the motor control current in both ascending and descending directions. Control force on tolerance contactors 4 oz. (113.4g) maximum, contact gap .020″ (.05cm), pre-travel .250″ (.625cm), end .250″ (.625cm) quick connect.
Reduction:
This ultra-solid drive unit uses a V-belt (5L) and two cast aluminum alloy pulleys, one of 2″ (5cm) and one of 8″ (20cm) type B, offset to ensure smooth operation, in primary reduction. Five 41B12 steel gears and a 41B36 with an RC41 roller chain, mounted on a 1″ cold rolled steel shaft, rotating on four high-speed self-lubricating and self-aligning 1″ (2.5cm) bearings ensure secondary reduction to the terminal shaft. All gears and pulleys are pinned or keyed to the transmission. Approx. door operating speed 1.0 foot/second (.3m/second).
Chassis:
This solid assembly consists of 2″ x 2″ x 1/8″ (5cm x 5cm x .31cm) steel angles reinforced with steel plates, all welded for extra strength.
Carrier:
Consists of hot rolled steel angles 2″ x 2″ x 1/8″ (5cm x 5cm x .31cm), mounted with hot rolled steel rods. The cast aluminum alloy carriage, fully controlled by a No. 41 back-and-forth roller chain for smooth and frictionless operation, slides between these two solid steel angled rails. Additionally, a roller spacer bar supports the carriage in the center and prevents the chain from rubbing.
Safety lever:
Hot rolled steel bar 1″ x 3/8″ (2.5cm x .93cm), bent at 90o, adjustable according to the free height, with a spring hook attached to an aluminum support on the door. This lever quickly releases the operator from the door, without tools, to allow manual operation in case of a power outage.
Manual overload relay:
Protects the operator against overload or voltage deficiency. Can be manually reset.
Voltage reduction transformer:
120V. A.C. primary to 24V. A.C. secondary
25 V.A. min. 240V. A.C. primary to 24V. A.C. secondary
208V, 460V, 600V. A.C. primary to 24V. A.C. secondary
Motor:
Designed for continuous output (capacitor start on single phase models) 1/3 C.V. (.33HP), 1/2 C.V. (.5HP) or 3/4 C.V. (.75HP) or 1 C.V., 115V. or 230V. single phase, 208V., 440V., 550V. three phase, 1725 RPM bearings with permanent lubrication, rigid type 56 frame, 5/8″ (2.05cm) diameter shaft. (1 C.V. not recommended for single phase motors).
High efficiency solenoid brake:
Consists of a 4″ (10cm) diameter aluminum alloy disc, keyed to the motor shaft, brake segments with external compression force 360o spring mechanism. The braking disc stops the door when the solenoid contactor is released. Mounted on heavy gauge steel plates, protected by a 14 gauge steel housing. The solenoid brake mechanism is self-adjusting.
The unit is factory pre-connected with color coding and labels.
Diagrams are included with each operator.
The device is put into operation and checked before shipping.
Leader in door and gate operator
