OPERATOR SPECIFICATIONS
MOTOR
TYPE: . . . . . . . . . . . . . . . . . . . . . . . Continuous duty
HORSEPOWER:
Model GSD . . . . . . . . . . . . . . . . . . 1/2, 3/4, 1, 1-1/2 HP
Model SD . . . . . . . . . . . . . . . . . . 1/3, 1/2, 3/4 and 1 HP
SPEED (at rated load):. . . . . . . . . . . . . . . . . 1725 RPM
VOLTAGE: . . . . . . . . . . . . . . . . . . . 115/230V 1 Phase
CURRENT (Amperage):
Voltage-Phase
1/3HP
115-1Ø, 60Hz
8.5
230-1Ø, 60Hz
4.2
208/230-3Ø, 60Hz
3
460-3Ø, 60Hz
1.5
575-3Ø, 60Hz
1.3
ELECTRICAL
TRANSFORMER: . . . . . . . . . . . . . . . . .24Vac Secondary
CONTROL STATION: . . . . . . . . . . . NEMA 3-Button Station
WIRING TYPE: . . . C2 (Standard) Momentary contact to OPEN &
STOP, constant pressure to CLOSE, plus wiring for LMEP
Device to reverse and auxiliary devices to open and close
with open override. See page 19 for optional
LIMIT ADJUST: . . Linear driven, fully adjustable screw type cams.
MAXIMUM DOOR AREA
MODEL GSD
Horsepower
Maximum Door
Weight (lbs.)
1/2 HP
3/4 HP
1 HP
1-1/2 HP
Introduction
208/230/460/575V 3 Phase
1/2HP
3/4HP
1HP
11.2
13.6
16
5.6
6.8
8
3.1
4
6
1.75
2
3
1.4
1.6
1.8
Open/Close/Stop w/LED
wiring types and operating modes.
Adjustable to 24'
Maximum Door
Area (sq. ft.)
1400
300
2200
420
2800
520
3400
620
SAFETY
DISCONNECT: . . . . . . . . . . . Quick disconnect door arm for
ENTRAPMENT PROTECTION DEVICES:
LiftMaster Monitored Entrapment Protection (LMEP)
Photoelectric Sensors (CPS-U): . . . . . . . . . . . . . . . Through beam
used to provide non-contact entrapment protection.
Edge Sensor (Optional): . . . . . . . . . . . Electric or pneumatic edge
1-1/2HP
*Monitored Photoelectric Sensors and Edge Sensors are required
20
for any momentary contact to close mode of operation.
10
7
3.5
MECHANICAL
2.75
DRIVE REDUCTION:
Model GSD . . . . . . . . . . . . . . . . Primary: 20:1 Heavy duty
Model SD . . . . . . . . . . . . . . . . . Primary: Heavy duty (5L)
OUTPUT SHAFT SPEED:
Model GSD . . . . . . . . . . . . . . . . . . . . . . . . . . 113.5
Model SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
DOOR SPEED (not adjustable): . . . . . . . . 11-12" per second
BRAKE: . . . . . . Solenoid actuated drum brake on 3/4 and 1 HP
Solenoid actuated disc brake standard on Model GSD
BEARINGS: . . . . . . . . . . . . . . . . . Output Shaft: Shielded
Model SD . . . . . . . . . . . . Clutch Shaft: IronCopper sintered
MODEL SD
Horsepower
1/3 HP
1/2 HP
3/4 HP
1 HP
4
emergency manual door operation.
sensor attached to the bottom edge of door.
worm gear-in-oil-bath speed reducer
Output: #41 chain
V-Belt Secondary: #41 chain/sprocket;
Output: #41 chain (1/3 and 1/2 HP)
#41 chain (3/4 and 1 HP)
(available as an option for 1/3 and 1/2 HP)
and oil impregnated
Maximum Door
Maximum Door
Weight (lbs.)
Area (sq. ft.)
750
1300
1850
2400
RPM
RPM
ball bearing
180
260
340
480