Chamberlain GJ User manual

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Liftmaster Logo 50%
3/30/89
The Chamberlain Group, Inc.
A DUCHOSSOIS ENTERPRISE
845 Larch Avenue
Elmhurst, Illinois 60126
OWNER'S MANUAL
MODEL GJ
SOLID STATE
INDUSTRIAL DUTY
GEARHEAD JACKSHAFT OPERATOR
NOT FOR RESIDENTIAL USE
Serial #
(located on electrical box cover)
Installation Date
Wiring Type
41B6
LISTED
DOOR
OPERATOR
R
LR78500
CERTIFIED
DOOR
OPERATOR
R

C
L
C
4-3/4"
14"
8-7/8"
7"
B
A
5-1/2"
2
MECHANICAL
DRIVE REDUCTION:.............40:1 Reduction
Heavy duty bronze worm
gear reducer
OUTPUT SHAFT SPEED:.....43 R.P.M.
DOOR SPEED:......................4 - 10" per sec.
depending on door
BRAKE: .................................Solenoid actuated disc
brake
HOIST WHEEL:.....................Standard mounting on
left or right side
SAFETY
DISCONNECT:.............Floor level chain hoist with elect-
rical interlock for emergency manual door operation
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.
MOTOR
TYPE:.....................................Continuous duty
HORSEPOWER:....................1/2, 3/4 & 1 Hp
Single or Three phase
1-1/2 & 2 HP Three
phase
SPEED:..................................1725 RPM
VOLTAGE:.............................115/208-230 Single
phase
208-230 Three phase
CURRENT: ............................See motor nameplate
SPECIFICATIONS
ELECTRICAL
CONTROL VOLTAGE: ....5V dc
AUXILIARY VOLTAGE:...24V dc
CONTROL STATION: .....NEMA 1 three button station.
OPEN/CLOSE/STOP
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.
WEIGHTS AND DIMENSIONS
HANGING WEIGHT:.........80-110 LBS.
GJ OPERATOR
CLUTCH
DIMENSION - A
DIMENSION - B
DIMENSION - C
1/2 HP
YES
28-11/16”
14-5/16”
13-1/16”
NO
24-15/16”
10-9/16”
13-1/16”
3/4 HP
YES
28-13/16”
14-7/16”
13-1/16”
NO
25-1/16”
10-11/16”
13-1/16”
1 HP
YES
29-1/16”
14-11/16”
13-1/16”
NO
25-5/16”
10-15/16”
13-1/16”
1 1/2 HP
YES
29-3/16”
14-13/16”
13-9/16”
NO
25-7/16”
11-1/16”
13-9/16”
2 HP
YES
29-13/16”
15-7/16”
13-9/16”
NO
26-1/16”
11-11/16”
13-9/16”

CAUTION
CONNECT REVERSING EDGE
SWITCH - SEE INSTALLATION
INSTRUCTIONS
FOR INDOOR USE ONLY
INSTALL MORE THAN 8 FT. ABOVE DOOR
LOCATE CONTROL STATION SO THAT DOOR IS WITHIN
SITE OF PERSON OPERATING THE CONTROL. DOOR
MUST BE CONTROLLED BY 3 BUTTON STATION
Cotterpin
Disconnect Lever
Cutout for Rollpin
(typical both sides)
Hand
Chain Wheel
Chain Guide
3
2-1/4"
FIGURE 1
Shaft Support Bracket
with Bearing (Not Supplied)
Door Sprocket
TO AVOID DAMAGE TO DOOR AND OPERATOR,
MAKE ALL DOOR LOCKS INOPERATIVE. SECURE
LOCK(S) IN "OPEN" POSITION.
IF THE DOOR LOCK NEEDS TO REMAIN
FUNCTIONAL, INSTALL AN INTERLOCK SWITCH.
DO NOT CONNECT ELECTRIC POWER UNTIL
INSTRUCTED TO DO SO.
KEEP DOOR BALANCED. STICKING OR BINDING
DOORS MUST BE REPAIRED. DOORS, DOOR
SPRINGS, CABLES, PULLEYS, BRACKETS AND
THEIR HARDWARE MAY BE UNDER EXTREME
TENSION AND CAN CAUSE SERIOUS PERSONAL
INJURY. CALL A PROFESSIONAL DOOR
SERVICEMAN TO MOVE OR ADJUST DOOR
SPRINGS OR HARDWARE.
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
SITE PREPARATIONS
It is imperative that the wall or mounting surface
provide adequate support for the operator.
This surface must:
a) Be rigid to prevent play between operator and
door shaft.
b) Provide a level base.
c) Permit the operator to be fastened securely and
with the drive shaft parallel to the door shaft.
The safety and wear of the operator will be adversely
affected if any of the above requirements are not met.
For metal buildings, fasten 2” x 2” x 3/16” (or larger)
angle iron frames to the building purlins. Retain
2-1/4” between frames. See Figure 1.
The GJ operator may be mounted on either the right (standard) or left side of door, and in either a vertical
(standard) or horizontal mounting position. Refer to the steps below if you require the hand chain and/or
disconnect chain to be on the opposite side of the operator; Or if the operator is being mounted in a horizontal
position.
MOUNTING CONVERSIONS
Hand Chain Right/Left Conversion
Remove the two snap rings (1 pc. outer, 1 pc inner)
on hand chain shaft assembly. Position roll-pin to fit
through cutout in frame and slide complete shaft
assembly through housing and bevel gear. Insert
shaft assembly on opposite side of housing, and
replace bevel gear, bearing, hardware, and snap rings
on the opposite side of shaft in the same manner.
Disconnect Lever Right/Left Conversion
Remove cotter pins on the ends of the disconnect
shaft (square shaft), move the disconnect lever arm to
the opposite side, and replace the cotter pins. Be
sure to keep two(2) 12ga. washers on the side without
the lever arm.
Horizontal Mounting Conversion
Remove cotter pins on the ends of the disconnect
shaft (square shaft), and remove lever. Replace lever
using square hole on opposite end of lever.
Reposition sash chain to opposite end of lever also.
Replace cotterpins.
IMPORTANT SAFETY NOTES
FIGURE 2

4
1a. Wall Mounting
The operator should generally be installed below
the door shaft, and as close to the door as
possible. The optimum distance between the door
shaft and operator drive shaft is between 12” - 15”.
On concrete buildings, attach a shaft support
bracket to the wall of the building. Refer to Figure 3.
OPERATOR MOUNTING
IMPORTANT: An additional wall mounting
plate (P/N 10-9098) or equivalent is
recommended to provide additional support
and to allow for adjustment of the drive chain.
IMPORTANT: The shelf or bracket must
provide adequate support, prevent play
between operator and door shaft, and permit
operator to be fastened securely and with the
drive shaft parallel to the door shaft.
1b. Bracket or Shelf Mounting
The operator may be mounted either above or
below the door shaft. The optimum distance
between the door shaft and operator drive shaft is
between 12” - 15”. Refer to Figure 4.
1c. Place door sprocket on the door shaft. Do not
insert the key at this time.
2. Place drive sprocket on the appropriate side of
the operator. Do not insert the key at this time.
3. Wrap drive chain around door sprocket and join
roller chain ends together with master link.
4. Raise operator to approximate mounting position
and position chain over operator sprocket.
5. Raise or lower operator until the chain is taut (not
tight). Make sure the operator output shaft is
parallel to door shaft and sprockets are aligned.
When in position, secure the operator to wall or
mounting bracket.
6. Align sprockets and secure, (see Figure 5).
Mount Door Sprocket to Door.
Sprocket Supplied with Door,
(Not with Operator).
Refer to Door Owner's Manual
for Installing Door Sprocket
Installation of Operator to
Sheet Type Rolling Doors
or Rolling Doors without
Live Drive Shaft
Door
Sprocket
Mounting
Bracket
(Optional)
Drive
Sprocket
Direction of Output Shaft
Rotation for OPEN
FIGURE 4FIGURE 3
The standard GJ operator is setup for mounting on right side of the door and in vertical position. If necessary,
refer to the operator mounting conversions on page 3. Refer to the illustrations and instructions below that suits
your application.
Be sure door sprocket
is properly aligned with
drive sprocket before
securing to shaft.
FIGURE 5

SENSING EDGES
All types of sensing edges with an isolated normally
open (N.O.) output are compatible with your
operator. This includes pneumatic and electric
edges. If your door does not have a bottom sensing
edge and you wish to purchase one, contact the
supplier of your operator.
If not pre-installed by the door manufacturer, mount
the sensing edge on the door according to the
instructions provided with the edge. The sensing
edge may be electrically connected by either coiled
cord or take-up reel. Refer to the steps below
Important Notes:
a) Proceed with Limit Switch Adjustments before
making any sensing edge wiring connections to
operator as described on page 8
b) Electrician must hardwire the junction box to the
operator electrical box in accordance with local
codes.
TAKE-UP REEL: Take-up reel should be installed
12" above the top of the door.
COIL CORD: Connect operator end of coil cord to
junction box (not supplied) fastened to the wall
approximately halfway up the door opening. 5
FIGURE 5
FIGURE 7
Installation of Operator
to Sectional Door
(Metal Building)
Make-up Box
(Not Provided)
Take-up Reel
(Optional)
Coil Cord
(Optional) Pneumatic Air Switch:
Not required or supplied
when electric sensing
edge is used
Air Hose
Sensing Edge
Wire (24V)
ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)
7. Install Hand Chain
Place hand chain around hand chain wheel. Be
sure to pass it through both openings in the chain
guide. Remove enough links so chain hangs
approximately two feet above the floor.
8. Mount Chain Keeper
Using suitable hardware mount the chain keeper
approximately 4 feet above the floor, near the free
hanging chain. Remove disconnect sash chain
from bag and place the end through the keyhole
in the the chain keeper. Remove excess links if
necessary.
EMERGENCY MANUAL HOIST OPERATION
IT IS STRONGLY RECOMMENDED THAT A
SENSING EDGE OR OTHER ENTRAPMENT
PROTECTION DEVICE BE USED IN
CONJUNCTION WITH THIS OPERATOR.
a) Pull the disconnect chain (small chain) to engage
the hoist mechanism. The disconnect chain may
be locked in position by slipping the end through
the keyhole of chain keeper mounted on the wall.
b) Operate the door in the desired direction by
pulling on one side or the other of the continuous
loop hoist chain (large chain).
In case of emergency or power failure, the operator has provision for manually operating the door. An electrical
interlock will disable the electrical controls when manual hoist is used. To operate the hoist:
c) The disconnect chain must be released from
chain keeper before door will operate again
electrically.
Mount Chain Keeper
approx. 4 feet above
floor
FIGURE 6

6
INSTALL CONTROL STATION
WARNING
TO PREVENT ENTRAPMENT
DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
OPEN
CLOSE
STOP
Control Station
WARNING Notice
Push
Buttons
The Chamberlain Group, Inc.
Install Control Station (Three Button Art)
MJ CDO #2 (Green)
6/20/91
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
DISCONNECT POWER AT THE FUSE BOX BEFORE
PROCEEDING.
OPERATOR MUST BE PROPERLY GROUNDED AND
CONNECTED IN ACCORDANCE WITH LOCAL
ELECTRICAL CODES. NOTE: THE OPERATOR
SHOULD BE ON A SEPARATE FUSED LINE OF
ADEQUATE CAPACITY.
ALL ELECTRICAL CONNECTIONS MUST BE MADE
BY A QUALIFIED INDIVIDUAL.
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
TO AVOID DAMAGE TO DOOR AND OPERATOR,
MAKE ALL DOOR LOCKS INOPERATIVE. SECURE
LOCK(S) IN "OPEN" POSITION.
IF THE DOOR LOCK NEEDS TO REMAIN
FUNCTIONAL, INSTALL AN INTERLOCK SWITCH.
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
INSTALL THE CONTROL STATION WHERE THE
DOOR IS VISIBLE, BUT AWAY FROM THE DOOR AND
ITS HARDWARE. IF CONTROL STATION CANNOT BE
INSTALLED WHERE DOOR IS VISIBLE, OR IF ANY
DEVICE OTHER THAN THE CONTROL STATION IS
USED TO ACTIVATE THE DOOR,
A REVERSING
EDGE MUST
BE INSTALLED ON THE BOTTOM OF
THE DOOR.
FAILURE TO INSTALL A REVERSING
EDGE UNDER THESE CIRCUMSTANCES MAY
RESULT IN SERIOUS INJURY OR DEATH TO
PERSONS TRAPPED BENEATH THE DOOR.
1. Complete electrical connections to the operator
and the control station. Fasten the control station
to the wall and MOUNT THE WARNING NOTICE
BESIDE OR BELOW THE PUSH BUTTON
STATION.
2. Apply power to the operator. Press OPEN push
button and observe direction of output shaft
rotation. See Figure 4, page 4. Press the STOP
button.
If shaft does not rotate in the correct direction,
check for improper wiring at the control station or
between operator and control station.
If the operator is three phase and control station
wiring is correct, exchange any two of the three
incoming power leads.
If electrical problems persist, call our Toll Free
number for assistance (1-800-528-6563).
CABLE CONNECTION NOTE:
Be sure to use the control box opening with the
1-1/16" hole for the POWER cable. All control wires
use the 7/8" hole.
Refer to Master Wiring Diagram. Make connection
through holes labeled for power and control. Do
not run control wires in the same conduit as
power wires.
Before installing control station be sure to follow all warnings described below. Failure to so may result
in severe injury to persons and/or damage to operator. Do not install any wiring or attempt to run the
operator without consulting the wiring diagram. Install the optional Reversing Edge before proceeding
with the Control Station installation.
IMPORTANT: Mount WARNING NOTICE beside or
below the push button station.
IMPORTANT SAFETY NOTES CONTROL STATION WIRING
MOUNT WARNING NOTICE
7/8" Hole (far side)
for low voltage
CONTROL WIRES
1-1/16" Hole (near side)
for high voltage
POWER WIRES

7
MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE
PROCEEDING WITH ADJUSTMENTS.
1. To increase door travel, spin nut away from actuator. To decrease door travel, spin limit nut toward actuator.
2. Adjust open limit nut so that door will stop in open position with the bottom of the door even with top of door
opening.
3. Repeat Steps 1 and 2 for close cycle. Be sure close limit actuator is engaged as door fully seats at the floor.
If other problems persist, call our toll-free number for assistance - 1-800-528-6563.
CLOSEOPEN
Open Limit
Nut Close Limit
Nut Travel Nut
Retainer
Close Limit
Switch
Open Limit
Switch
OLS CLS
SLS
Actuator
The Chamberlain Group, Inc.
Travel Nut Retainer 
2/22/94 - 2/27/94
Press Travel Nut Retainer Down
Toward Frame TO DISENGAGE.
6
TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION, DISCONNECT ELECTRIC
POWER BEFORE MANUALLY MOVING LIMIT NUTS.
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
ADJUST LIMITS

8
Remove clutch cover and adjust clutch so that it is
tight enough to open and close the door but will slip
when the door meets an obstruction. Either loosen or
tighten the clutch nut with 1/4 turn increments. After
adjustment is completed, tighten locking set screw
and re-install clutch cover. Reconnect power to
operator and test for proper operation. The clutch will
require periodic inspection and adjustment.
Motor
Clutch
Adjusting
Nut
The Chamberlain Group, Inc.
GJ CDO Adjusting Clutch
Disk #3 (Red)
9/19/91
The operator has been pre-wired to accept
connection of a reversing edge device. Connect the
normally open contacts to terminals T4 and T8 on the
low voltage terminal block. A cut-off switch will de-
activate the safety device during the last few inches
of the door's downward travel.
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
IF CONTROL STATION CANNOT BE INSTALLED
WHERE DOOR IS VISIBLE, OR IF ANY DEVICE OTHER
THAN THE CONTROL STATION IS USED TO ACTIVATE
THE DOOR,
A REVERSING EDGE MUST
BE INSTALLED
ON THE BOTTOM OF THE DOOR.
FAILURE TO INSTALL
A REVERSING EDGE UNDER THESE CIRCUMSTANCES
MAY RESULT IN SERIOUS PERSONAL INJURY OR
DEATH TO PERSONS TRAPPED BENEATH THE DOOR.
WARNING
CAUTION
WARNING
WARNING
CAUTION
WARNING
TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION, DISCONNECT ELECTRIC
POWER TO OPERATOR BEFORE ADJUSTING SLIP
CLUTCH.
CAUTION: The torque limiter clutch is NOT an
automatic reversing device. An electric or
pneumatic reversing edge can be added to bottom
edge of door if desired.
ADJUST CLUTCH (OPTIONAL)
CONNECT REVERSING EDGE DEVICE (OPTIONAL)
NOTICE:
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case the
user will be required to correct the interference at his own expense.

9
✳ Use SAE 30 Oil (Never use grease or silicone spray).
✳✳ Use Mobil SHC75W90 all climate synthetic oil.
✔Repeat ALL procedures.
■ Do not lubricate motor. Motor bearings are rated for continuous operation
■Do not lubricate clutch.
■Inspect and service whenever a malfunction is observed or suspected.
■CAUTION: BEFORE SERVICING, ALWAYS DISCONNECT OPERATOR FROM POWER SUPPLY.
EVERY EVERY EVERY
ITEM PROCEDURE 3 MONTHS 6 MONTHS 12 MONTHS
Drive Chain Check for excessive slack.
Check & adjust as required.
Lubricate.*
● ✔
Sprockets Check set screw tightness ● ✔
Clutch (Optional) Check & adjust as required ● ✔
Gear Reducer** Check for leaks and replace
seals as needed ● ✔
Fasteners Check & tighten as required ● ✔
Manual Disconnect Check & Operate ● ✔
Check at the intervals listed in the following chart.
OUR LARGE SERVICE ORGANIZATION
SPANS AMERICA
INSTALLATION AND SERVICE INFORMATION
ARE AVAILABLE 6 DAYS A WEEK
CALL OUR TOLL FREE NUMBER – 1-800-528-6563
HOURS 7:00 TO 3:30 p.m. (Mountain Std. Time)
MONDAY Through SATURDAY
IN CANADA
CALL OUR TOLL FREE NUMBER – 1-800-654-4736
WHEN ORDERING REPAIR PARTS
PLEASE SUPPLY THE FOLLOWING INFORMATION:
PART NUMBER DESCRIPTION MODEL NUMBER
ADDRESS ORDER TO:
THE CHAMBERLAIN GROUP, INC.
Electronic Parts & Service Dept.
2301 N. Forbes Blvd., Suite 104
Tucson, AZ 85745
MAINTENANCE SCHEDULE
HOW TO ORDER PARTS

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