Work included - The electric operator will be Lift-Master Model J as manufactured by The Chamberlain Group, Inc. Related work - Door preparation, miscellaneous or structural metal work, field electrical wiring, wire, conduit, fuses and disconnect switches are in the scope of work of other divisions or trades.
Supply Model J, industrial-duty, cUL listed, belt drive jackshaft type operator(s) rated -H.P., -Volts, - Phase.
Provide cUL listed electric door operator assembly of size and capacity recommended by door manufacturer; complete with electric motor and factoryprewired motor controls, positive locking mechanical brake, emergency disconnect, 3-button OPEN/CLOSE/STOP control station, conduit and wiring from control to motor and accessories required for proper operation.
Motor shall be high starting torque, continuous-duty, industrial type, protected against overload by a current sensing or thermal overload device.
SPECIAL NOTE TO ARCHITECT: For cUL approved Self-Monitoring Safety Operation in 115V and 208-240V single or three phase applications, select Option #1 and add "Must include a CPS JITM Self-Monitoring Sensor to detect obstructions in the doorway."
Option #1: For 115V, 208-24OV. Motor Starter, Controls, Enclosures: Motor starter shall be cUL approved solid state Triac Circuity type. Motor starting device shall be enclosed in a NEMA I enclosure and integral with the operator. Control enclosures shall conform to ANSI/NEMA ICS6. OPEN/CLOSE/STOP control stations shall be NEMA type 1.
Option #2: For 115V, 208-24OV, 460V or 575V operation: Motor Starter, Controls, Enclosures: Motor starter shall be an across-the-line, mechanically interlocked, magnetic reversing contactor. Motor starting device shall be enclosed in a NEMA I enclosure and integral with the operator. Control enclosures shall conform to ANSI/NEMA ICS6. A NEMA type I OPEN/CLOSE/STOP control station shall be provided as standard equipment.
Primary speed reduction shall be heavy-duty 5L V-belt and sprocket double reduced secondary providing mechanical braking to hold the door in any position. Operator shall be equipped with an adjustable friction clutch and floor level disconnect, output and door driven sprocket shall be provided with the operator. Operator shall be capable of driving the door at a speed of approximately 8 to 9 inches per second.
Fully adjustable, driven linear type limit switch mechanism shall synchronize the operator with the door. Low friction nylon limit nuts fitted on threaded steel shaft, rotating on oilite self-lubricating bronze bushings. The motor shall be removable without affecting the limit switch settings.
Install the motor operator in accordance with Lift-Master instructions and standards and in compliance with applicable federal, state or local regulations.
Lift-Master Commercial Door Operators and accessories shall be warranted to be free of any defect in materials and workmanship for a period of two years.