Chamberlain GJ Owner's Manual page 2

SPECIFICATIONS
TYPE:.....................................Continuous duty
HORSEPOWER:....................1/2, 3/4 & 1 Hp
SPEED:..................................1725 RPM
VOLTAGE:.............................115/208-230 Single phase
CURRENT: ............................See motor nameplate
MECHANICAL
DRIVE REDUCTION:.............40:1 Reduction
OUTPUT SHAFT SPEED: .....43 R.P.M.
DOOR SPEED: ......................4 - 10" per sec.
BRAKE: .................................Solenoid drum brake
HOIST WHEEL: .....................Standard mounting on
WEIGHTS AND DIMENSIONS
HANGING WEIGHT: .........80-110 LBS.
GJ OPERATOR
CLUTCH
DIMENSION A
DIMENSION B
MOTOR
Single or Three phase
1-1/2 & 2 HP Three phase
208-230 Three phase
Heavy duty bronze worm
gear reducer
depending on door
left or right side
12 3/4"
1/2 HP 3/4 HP
YES NO YES
28 9/16" 24 13/16" 28 11/16" 24 15/16" 28 15/16"
14 5/16" 10 9/16" 14 7/16" 10 11/16" 14 11/16" 10 15/16" 14 13/16" 11 1/16" 15 7/16" 11 11/16"
CONTROL VOLTAGE:.5V dc
AUXILIARY VOLTAGE: 24V dc
CONTROL STATION: ..3 Button
WIRING TYPE: .............B2 (Standard)
Momentary contact to OPEN/CLOSE/STOP plus wiring
for sensing device to reverse and auxiliary devices to
open and close with open override.
(Other types available. See chart, Pg. 14)
LIMIT ADJUST: ............Linear driven, fully
adjustable screw type cams. Adjustable to 30 feet.
DISCONNECT: .............Spring loaded floor level
CLUTCH: (optional)....Adjustable torque limiter type
REVERSING EDGE:.....(Optional) Electric or pneumatic
sensing device attached to the bottom edge of door.
A REVERSING EDGE IS STRONGLY
RECOMMENDED FOR ALL COMMERCIAL
OPERATOR INSTALLATIONS. REQUIRED WHEN
THE 3 BUTTON CONTROL STATION IS OUT OF
SIGHT OF DOOR OR ANY OTHER CONTROL
(AUTOMATIC OR MANUAL) IS USED.
4 3/4"
A
7 3/8"
14 3/4"
1 HP
NO YES NO
25 3/16" 29 1/16" 25 5/16" 29 11/16" 25 15/16"
2
ELECTRICAL
OPEN/CLOSE/STOP, NEMA 1
SAFETY
disconnect arm
B
5 1/2"
8 3/4"
1-1/2 HP 2 HP
YES NO YES NO