Product No. MD5011
DOOR TYPE
Fiberglass
Steel-24 Ga.
Steel-22 Ga.
Aluminum
Wood
Steel-20 Ga.
Steel-24 Ga. insulated
Steel-16 Ga.
Steel-20 Ga. insulated
Steel-16 Ga. insulated
Medium Duty Drawbar Commercial Door Operator
MAXIMUM DOOR
AREA (SQ. FEET)
310
260
225
150
100
Commercial Door Operators
MD SERIES
1/2 HP Drawbar garage door operator for standard
lift sectional doors.
RATINGS
• 115 VAC, Single phase, 1/2 HP only
• Maximum duty cycle: 10 cycles per
hour, 75 cycles per day
• Maximum door height: 14 feet
• Shipping weight: 115 lbs.
FEATURES
• All Steel Frame
• V-Belt drive from motor to clutch shaft
• Adjustable friction clutch
• Full #65 Roller Chain Drive
• Quick release door arm for manual door operation
• Standard door speed is approximately
11 inches per second
• Standard rail & chain assembly for door up to 12’ 6” high
• Solid state or electromechanical control circuit
• Motor overload protection
• Wired to accept reversing devices
• Internally adjustable limit switches
• 1/2 HP rigid base permanent split capacitor motor
• 24-Volt control circuit with OPEN,
CLOSE and STOP button station
• OPEN button (and single button) will
automatically override down travel and
reverse door to the full open position
• External terminals for single button
(residential type) radio control
RAIL OPTIONS
FACTORY OPTIONS
WARRANTY
www.linearcorp.com Specifi cations subject to change without notice800.421.1587
• Rail for up to 14’ 6” high doors
• Solid state controller: Add S to model number
• Solenoid brake: Add -BK to model number
• MVP-MR 3-channel open-close-stop
modular receiver installed (on solid state
controller model only): P/N 2650-159
• MVP-RE-24V-8W-FC 1-door open-close-stop receiver (for
electromechanical controller model only): P/N 190-110554
• 2 years
Solid State Control
MD Series
DRAWBAR OPERATOR
Medium-Duty Commercial Operator
CUSTOMER
PROJECT
ARCHITECT/ENGINEER
CONTRACTOR
DRAWING NUMBER DATE SHEET OF
ORDERING INFORMATION:
SUPPLY __________ LINEAR OPERATOR(S) MODEL
WITH A MOTOR RATING OF __________HP, __________VOLTS, _____PHASE, _____HERTZ
FOR A __________ WIDE X __________ HIGH DOOR(S) WITH ______________________________________
SUPPLY _______ OPEN-CLOSE-STOP CONTROL STATION(S) IN NEMA _______ ENCLOSURE PER OPERATOR
______________ DRIVE SPROCKET ______________ DOOR SPROCKET
1/2 115 1
M D 5 0 1 1 S _____________________________
60
AUXILIARY AND OPTIONAL EQUIPMENT AS SPECIFIED BELOW OR ON ATTACHED SHEET:
ARCHITECTURAL SPECIFICATIONS (DRAWBAR):
Electric door operator(s) shall be Solid State Con trol Model MD of the trolley (drawbar) type, manufactured by Linear LLC and
Underwriters Laboratory (UL) listed. Operators will be equipped with two-stage speed reduction (V-belt primary and roller chain and sprocket
secondary) and an adjustable slip clutch. Each operator will have a double angle (nominal 11 gage, 2” X 2”) trolley track of sufficient length to
accommodate the height of the installed door. The trolley will be driven with roller chain. The door arm will be provided with a trolley
disconnect for manual door operation. The operator will be equipped with an integral limit system that provides accurate settings to control the
open and close positions of the door and will not be affected by manual door operation or motor removal. The motor and operator will be
protected against overload by a thermal protector. The operator will have a 24VAC secondary solid state control circuit with advanced switch
selectable features, motor load delivered via high amperage, inductive load rated relays. The operator will have provisions for connecting openclose-stop pushbutton stations, radio controls, and external obstruction sensing (reversing) systems. Operator will drive the door at a speed of
approximately 8-10 inches per second.
NOTES:
REFER TO PRODUCT DATA SHEET FOR GENERAL INFORMATION
REFER TO DRAWING____________FOR WIRING DIAGRAM
LINEAR LLC Phone 800-421-1587
1950 Camino Vida Roble Ste. 150 Fax 800-468-1340
Carlsbad, CA 92008 Website www.linearcorp.com
Copyright © 2010 Linear LLC P891 X1
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