For overhead type doors with standard lift, high lift or vertical lift hardware, also for rolling service doors and grilles. Many other types of doors can be equipped with this operator, providing the door has a shaft as the basic driving element. LJ Model has a floor lever disconnect device which allows a person to disengage the operator from the door and operate door by hand in the event of power failure, electromechanical disengagement is provided. Limit switches will not go out of adjustment when door is used manually. LJH Model is essentially the same as LJ but equipped with hand “chain hoist”, permitting manual operation of the door from floor, in case of power failure. All other features remain the same.
DC2000 DEDICATED LOGIC CONTROLLER USED IN CONJONCTION WITH LJ-LJH ELECTRIC OPERATORS
The DC2000 dedicated logic controller has been designed to accept, and operate with, any automatic or manual activators without the need of programming. A slide switch has been provided to select manual or automatic mode.
If manual mode is selected the following controls can be used to activate the door.
Push button open/close/stop
Reversing activator
Open/close activator
Remote radio control system
If automatic mode is selected, in addition to the manual mode activators, an automatic closing (timer) adjustable from 10 to 180 seconds is in effect when the door is in the full open position, ready to signal the closing cycle after a predetermined delay. Connections for red and green warning lights is provided as well.
FEATURES
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Electrical control cabinet:
Factory pre-wired made from 14ga. H.R. steel preformed enclosure size 8″ x 10″ x 5″ (20cm x 25cm x 12.5cm) with removable cover for easy service and maintenance. Mounted on unit chassis with 4 zinc plated steel bolts.
Motor control:
Heavy duty reversing contactor STRUTHERS-DUNN or equal, two sets of three pole contactors on a common frame, mechanically interlocked to prevent simultaneous closure, clapper type armature with three point suspension auxiliary contacts DPDT on each armature, coils 24V. A.C. amps resistive 120V. A.C. 15 amps, 240V. A.C. 10 amps, 550V. A.C. 5 amps. Motor – 1 H.P. maximum, terminals .250″ (.625cm) quick connect, mechanical lift 10 million cycles.
Limit switches:
Screw type friction free oilite bronze cams, grooved and lock guided in a spring loaded formed galvanized steel plate. Cams are fitted on 5/8″ x 10-3/4″ (1.56cm x 26.88cm) C.R. threaded N/F steel shaft, rotating on lubricated high speed ballbearings. Cams on their preset travel, activate the micro switches to cut power off motor control in both open and close direction of door. Operating force on limit switches 4 oz. (113.4g) maximum, contact separation .020″ (.05cm), termination .250″ (.625cm) quick connect.
Manual overload relay:
Protects operator from overload and under voltage current. Can be reset manually.
Reduction:
Both LJ and LJH operators utilizes one 4L V belt, one 1-1/2″ (3.75cm) and one 7″ (17.5cm) type A cast iron and die cast aluminium alloy pulleys balance for smooth operation as primary reduction. Four 41B9 and two 41B23 steel sprockets with RC41 roller chain (all sprockets pinned or keyed on 5/8″ (1.56cm) and 1″ (2.5cm) C.R. shaft rotating on four 5/8″ (1.56cm) and two 1″ (2.5cm) precision lubricated high speed flanged bearings for secondary reduction to the output drive shaft. Door operating speed approx. 1.04′ (.3m) per second.
Unit chassis:
Formed steel frame assembly is made from 11 ga. C.R. steel reinforced with steel braces and welded together for greater strength. Size: 10-1/2″ wide – 20″ long – 7-1/2″ high (26.25cm x 50cm x 18.75cm).
Safety mechanical interlock:
When floor operated disconnect lever arm is in manual position the secondary drive through coupling mechanism is free, permitting door and operator to be independent from each other. Those given safety mechanical interlock to protect operator and door when power is restored and push button is pressed accidentally. Limit switches will not go out of adjustment when door is used manually.
Adjustable automatic friction clutch:
4″ (10cm) diameter aluminium disc attached to rotating shaft to one side of which a 4″ x 1/8″ (10cm x .31cm) non-flammable fiber clutch material is applied. One 7″ (17.5cm) H.D. V belt pulley is compressed by means of a heavy compression spring and nylon insert threaded nut, securely locked with 3/16″ (4.8mm) cotterpin. Friction clutch system can be adjusted as required depending on door size and weight. Clutch will protect door and operator in case of obstruction.
Emergency chain hoist (LJH Model only):
Combined with a floor operated disconnect which when pulled will disconnect the secondary drive and engage the chain hoist for manual operation in the event of power failure, without having to remove the main drive chain. Assembly consists of one grooved aluminium pocket wheel, lever arm, one coupling, 1/8″ (.31cm) D. pull cable, 7/16″ (11.1mm) D. bright polish chain, wall chain keeper and disconnect arm.
Heavy duty solenoid brake:
Made from one 4″ (10cm) diameter aluminium alloy disc mounted on keyed motor shaft, brake lined shoes with 360o exterior compressing force, throw spring loaded mechanism. Brake disc stops door when electro-magnetic solenoid switch is released. Mounted on heavy duty steel plates protected in 14 ga. steel enclosure. Brake mechanism is self-adjusting type.
Three button control:
Momentary contact type open, close and stop, fully guarded standard duty 600V. A.C. maximum. Screw type terminals.
Motor:
Rated for continuous duty (capacitor starts on single phase models) 1/3 H.P., 1/2 H.P., 3/4 H.P., 115V. or 230V., single phase, 208V., 460V. or 550V., three phase. 1725 R.P.M. ballbearings permanently lubricated, frame rigid type 56, shaft 5/8″ (1.56cm) diameter. Other voltage available on request.
Unit is factory pre-wired, colour coded and tagged, wiring diagrams are enclosed with each operator. Operator is pre-run and tested before shipment.
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