Chamberlain GH User manual

OWNER'S MANUAL
MODEL GH
INDUSTRIAL DUTY DOOR OPERATOR
Serial #
(located on electrical box cover)
Installation Date
Wiring Type
2 YEAR WARRANTY
C2 Wiring
F A C T O R Y S E T
See page 8 for
other wiring
configurations
NOT FOR RESIDENTIAL USE
LISTED DOOR OPERATOR
41B6

2
SPECIFICATIONS
14.00”
WEIGHTS AND DIMENSIONS
HANGING WEIGHT: .........80-110 LBS.
Hand Chain Wheel
See
Note #1
See
Note #2
A
X
B
Y
C
D
Y
See
Note #3
A
11-1/2
12-1/2
12-3/4
12-3/4
11
11
12
12-1/2
12-3/4
13-1/4
B
25-3/4
26-3/4
27
27
25-1/4
25-1/4
26-1/4
26-3/4
27
28-5/8
C
12-63/64
12-63/64
12-63/64
13-63/64
12-63/64
12-63/64
12-63/64
13-63/64
13-63/64
15-15/64
D
3
3
3
3-1/2
3
3
3
3-1/2
3-1/2
3
1/2
3/4
1
1-1/2
1/2
3/4
1
1-1/2
2
3
1
1
1
1
3
3
3
3
3
3
HP DIMENSIONS
NOTES:
1) Output Shaft with 1” x 1/4” Key for 1/2 thru 2Hp operators, 1-1/4” x 1/4” Key for 3Hp operators.
2) MT’G CENTERS: X = 4-3/4”; Y = 5-1/2” for 1/2 thru 2Hp operators
X = 7-17/32”; Y = 9-1/16” for 3Hp operators
3) Hand Chain Wheel extends 1-5/8” beyond operator in vertical mounting position as shown.
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 & 1-1/2 Hp
Single or Three phase
2 HP Three phase
SPEED:...............................1725 RPM
VOLTAGE: ..........................115, 220, 230 Single phase
230, 460, 575 Three phase
CURRENT: .........................See motor nameplate
ELECTRICAL
TRANSFORMER:.............24VAC
CONTROL STATION: ......NEMA 1 three button station.
OPEN/CLOSE/STOP
WIRING TYPE:.................C2 (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. 8)
LIMIT ADJUST:................Linear driven, fully
adjustable screw type cams. Adjustable to 30 feet.
PHASE

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
CAUTION
WARNING
WARNING
WARNING
CAUTION
WARNING
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 5-
1/2” between frames. See Figure 1.
OPERATOR PREPARATION
IMPORTANT SAFETY NOTES
5-1/2”
CAUTION
CONNECT REVERSING EDGE
SWITCH - SEE INSTALLATION
INSTRUCTIONS
FORINDOORUSEONLY
INSTALLMORETHAN8FT.ABOVEDOOR
LOCATECONTROLSTATIONSOTHATDOORISWITHIN
SITEOFPERSONOPERATINGTHECONTROL.DOOR
MUSTBECONTROLLEDBY3BUTTONSTATION
Cotterpin
Disconnect Lever
Cutout for Rollpin
(typical both sides)
Hand
Chain Wheel
Chain Guide
The GH 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.
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.
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”.
Refer to Figure 3.
OPERATOR MOUNTING
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).
FIGURE 4
FIGURE 3
Before your operator is installed, be sure the door has been properly aligned and is working smoothly. The
operator may be wall mounted or mounted on a bracket or shelf. If necessary, refer to the operator preparations
on page 3. Refer to the illustration and instructions below that suits your application.
Typical Right Hand
Wall Mounted Operator
Optimum Distance
12 - 15”
Optimum Distance
12 - 15”
OPTIONAL
Mounting Bracket
P/N 08-9098
Be sure door
sprocket is properly
aligned with drive
before securing to
the shaft.
Chain Keeper
FIGURE 5

These operators are equipped with a manual hoist. An
electrical interlock will disable the electrical controls
when the hoist is used.
To operate the hoist:
1. 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 the chain keeper mounted on the wall.
2. Operate the door in the desired direction by pulling
on one side or the other of the continuous loop hoist
chain (large chain).
3. The disconnect chain must be released from the
chain keeper before the door will operate again
electrically.
5
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
EMERGENCY MANUAL OPERATION
This operator has provisions for manually operating the door in case of emergency or power failure. Refer to the
appropriate instructions below for your model operator.
Model GH
Chain Keeper
(with pad locking provisions)
8. Mount Chain Keeper / Keyhole Bracket
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.
Electrical Interlock with Hoist for Models H and HJ
TURN OFF POWER TO THE OPERATOR BEFORE
MANUALLY OPERATING YOUR DOOR.
WARNING
CAUTION
CAUTION
WARNING
WARNING
BRAKE ADJUSTMENT
The brake is adjusted at the factory and should not need additional adjustment for the the life of the friction pad.
Replace friction pads when necessary. Refer to the illustration for identification of components for the solenoid
type brake system.
Friction Pads
Release Lever
Plate Assembly
Solenoid
Solenoid Brake System
Actuator Plate

6
TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION, DISCONNECT ELECTRIC
POWER BEFORE MANUALLY MOVING LIMIT NUTS.
WARNING
LIMIT SWITCH ADJUSTMENT
MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE
PROCEEDING WITH ADJUSTMENTS.
If other problems persist, call our toll-free number for
assistance - 1-800-528-2806.
1. To adjust limit nuts depress retaining plate to allow
nut to spin freely. After adjustment, release plate
and ensure it seats fully in slots of both nuts.
2. To increase door travel, spin nut away from actu-
ator. To decrease door travel, spin limit nut
toward actuator.
3. Adjust open limit nut so that door will stop in open
position with the bottom of the door even with top
of door opening.
4. Repeat Steps 1 and 2 for close cycle. Adjust close
limit nut so that actuator is engaged as door fully
seats at the floor.
Retaining Plate
CLOSE Limit Switch
SAFETY
(Aux. Close) Limit Switch
OPEN Limit Switch
Actuator
Aux. OPEN Limit Switch
SENSING EDGES & PHOTO EYES
Sensing devices supplied for door industry type operators
with an isolated normally open (N.O.) output are compati-
ble with your operator. This includes pneumatic and elec-
tric edges, and through beam and retro reflective photo
eyes. If your door does not have a bottom sensing edge or
safety photo eyes and you wish to add a safety device to
your application, please contact your local LiftMaster
Authorized Dealer.
If not pre-installed by the door manufacturer, mount the
sensing edge on the door according to the instructions pro-
vided with the edge. The sensing edge may be electrical-
ly 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 below.
b) Electrician must hardwire the junction box to the oper-
ator electrical box in accordance with local codes.
ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)
WIRING:
For wiring of your sensing device to the operator,
refer to the wiring diagram supplied with your opera-
tor. See field connection terminals identified as
Sensing Device or Safety Edge.
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.
IT IS STRONGLYRECOMMENDED THAT A
SAFETY PHOTO EYE OR SENSING EDGE BE
USED IN CONJUNCTION WITH THE OPERATOR.
NOTICE

7
WARNING
CAUTION
WARNING
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
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.
1. Be sure that the power supply is of the correct
voltage, phase, frequency, and amperage to supply
the operator. Refer to the operator nameplate on the
cover.
2. Using the 1-1/16” dia conduit access knockout
as shown below, bring supply lines to the operator
and connect wires to the terminals indicated on the
WIRING CONNECTIONS DIAGRAM.
DO NOT TURN POWER ON UNTIL YOU HAVE
FINISHED MAKING ALL POWER AND CONTROL
WIRING CONNECTIONS AND HAVE COMPLETED
THE LIMIT SWITCH ADJUSTMENT PROCEDURE.
CAUTION: THIS UNIT MUST BE PROPERLY
GROUNDED. A GROUND SCREW IS SUPPLIED IN
THE ELECTRICAL BOX FOR CONNECTION OF
THE POWER SUPPLY GROUND WIRE. FAILURE
TO PROPERLY GROUND THIS UNIT COULD
RESULT IN ELECTRIC SHOCK AND SERIOUS
INJURY.
Remove the cover from the electrical enclosure. Inside this enclosure you will find the wiring diagram(s)
for your unit. Refer to the diagram (glued on the inside of the cover) for all connections described below.
If this diagram is missing, call the number on the back of this manual. DO NOT INSTALL ANY WIRING OR
ATTEMPT TO RUN THIS OPERATOR WITHOUT CONSULTING THE WIRING DIAGRAM.
POWER WIRING
POWER WIRING CONNECTIONS
ON THREE PHASE MACHINES ONLY!
Incorrect phasing of the power supply will cause the
motor to rotate in the wrong direction (open when
CLOSE button is pressed and vice-versa). To correct
this, interchange any two of the incoming three phase
power lines.
CONDUIT ACCESS
WARNING
Do Not Run Power &
Control Wiring in the
Same Conduit
7/8” Dia Knockouts for
power wiring conduit access
(2 on end panel)
1-1/16’ Dia Knockout for
power wiring conduit access
(1 nearside)

8
CONTROL WIRING
Standard C2 or B2 Wiring
Standard operators are shipped from the factory with
jumper set for C2 wiring, which requires constant
pressure on button to close the door. If momentary
contact on close direction is desired (B2 wiring) you
must include an entrapment protection device. See
close control jumper setting below.
Constant pressure on close (C2 wiring)
Red jumper wire was placed on terminal #2 in
electrical enclosure. The operator will require
constant pressure on close control in order to keep
door moving in the close direction.
Momentary contact on close (B2 wiring)
Move red jumper wire from terminal #2 to terminal
#3. The operator will require only momentary
contact to close the door.
WIRING DIAGRAM
This Operator has
Control Wiring.
SUPPLEMENTAL WIRING DIAGRAM(S)
REPLACEMENT WIRING DIAGRAM
Note: Supplemental Wiring Diagrams are
to be used in addition to 1742-1.
Replacement Wiring Diagram is to be used
in place of 1742-1.
SPECIAL CONTROL
WIRING DATA
LOCATING THE CONTROL STATION
All operators are supplied with some type of control station. Generally a three button station
(OPEN/CLOSE/STOP) is provided. A two-position key switch or control station (OPEN/CLOSE) may be added or
substituted when requested at the time of order. Mount the control station near the door.
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 AREVERSING EDGE UNDER
THESE CIRCUMSTANCES MAY RESULT IN SERIOUS
INJURYOR DEATH TO PERSONS TRAPPED
BENEATH THE DOOR.
WARNINGW A R N I N G
TO PREVENT ENTRAPMENT
DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
OPEN
CLOSE
STOP
Standard
Control Station
WARNING Notice
Push
Buttons
IMPORTANT: Mount WARNING NOTICE beside or
below the push button station.
MOUNT WARNING NOTICE
DETERMINE WIRING TYPE
Refer to the wiring diagram located on the inside cover the electrical box to determine the type of control wiring.
Wiring Diagram label on inside cover
of electrical box
Wiring
Type
SPECIAL CONTROL WIRING
If your operator was shipped from the factory with
non-standard control wiring or with optional acces-
sories that require addition instructions, refer to the
wiring diagram(s) indicated in the special control
wiring data box. When a replacement wiring diagram
is present, wiring diagrams in this manual will not
apply. Refer only to the replacement wiring diagram
for all connections.
IMPORTANT NOTE: If your wiring diagram is missing,
or you are unsure of the wiring type for your operator, con-
tact the customer service department @ 1-800-528-2806.

9
CONTROL WIRING (con’t)
Radio Controls
On all models with type B2 control wiring, a terminal
bracket marked R1 R2 R3 is located on the outside of
the electrical enclosure. All standard radio control
receivers (single channel residential type) may be
mounted to this bracket. The operator will then open
a fully closed door, close a fully open door, and
reverse a closing door from the radio transmitter.
However, for complete door control from a transmitter,
a commercial three-channel radio set (with
connections for OPEN/CLOSE/STOP) is
recommended.
Additional Access Control Equipment
Locate any additional access control equipment as desired (but so that the door will be in clear sight of the person
operating the equipment), and connect to the terminal block in the electrical enclosure as shown on the FIELD
WIRING CONNECTIONS diagram. Any control with a normally (N.O.) isolated output contact may be connected
in parallel with the OPEN button. More than one device may be connected in this manner. Use 16 gauge wire or
larger for all controls. DO NOT USE THE CONTROL CIRCUIT TRANSFORMER (24VAC) IN THE OPERATOR
TO POWER ANY ACCESS CONTROL EQUIPMENT OTHER THAN A STANDARD RESIDENTIAL TYPE RADIO
RECEIVER.
External Interlock Switch
The operator has a terminal connection for an external interlock switch. This switch must be a normally closed
(N.C.) two-wire device with a contact rating of at least 3 amps @ 24VAC. When such a switch is connected as
shown on the FIELD WIRING CONNECTIONS diagram, the control circuit will be disabled when the switch is
actuated, thereby preventing electrical operation of the door from the control devices.
WARNING
CAUTION
WARNING
WARNING
DO NOT USE RADIO CONTROLS WITH YOUR
OPERATOR UNLESS YOU HAVE INSTALLED
SOME TYPE OF ENTRAPMENT PROTECTION
DEVICE. THE USE OF RADIO CONTROLS
PRESENTS POTENTIAL HAZARDS DUE TO THE
USER’S ABILITY TO OPEN OR CLOSE THE
DOOR WHEN OUT OF SIGHT OF THE DOOR. IN
ADDITION, IF A SINGLE CHANNEL CONTROL IS
USED, THE USER WILL NOT BE ABLE TO STOP
THE DOOR FROM THE TRANSMITTER.
CLUTCH ADJUSTMENT (OPTIONAL MODIFICATION)
1. Loosen set screws on clutch nut.
2. Back off clutch nut until there is very little tension
on the clutch spring.
3. Tighten clutch nut gradually until there is just
enough tension to permit the operator to move the
door smoothly but to allow the clutch to slip if the door
is obstructed. When the clutch is properly adjusted, it
should generally adjusted, it should generally be
possible to stop the door by hand during travel.
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.
TO AVOID SERIOUS PERSONAL INJURY OR DEATH
FROM ELECTROCUTION, DISCONNECT ELECTRIC
POWER TO OPERATOR BEFORE ADJUSTING SLIP
CLUTCH.
WARNING
CAUTION
WARNING
WARNING

10
TEST THE SYSTEM
Turn on power. Test all controls and safety devices to
make sure they are working properly. It will be
necessary to refer back to page 6 for fine adjustment
of the limit switches.
IMPORTANT NOTES:
Do not leave operator power on unless all safety
and entrapment protection devices have been
tested and are working properly.
Be sure you have read and understand all Safety
Instructions included in this manual.
Be sure the owner or person(s) responsible for
operation of the door have read and understand
the Safety Instructions, know how to electrically
operate the door in a safe manner, and know how
to use the manual disconnect operation of the
door operating system.
WARNING
CAUTION
WARNING
WARNING
DO NOT PLACE HANDS OR TOOLS IN OR NEAR
THE OPERATOR WHEN THE POWER IS ON OR
WHEN TESTING CONTROL OR SAFETY
DEVICES. ALWAYS DISCONNECT POWER
BEFORE SERVICING OR ADJUSTING THE
OPERATOR.
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.
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.
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.
WARNING
CAUTION
WARNING
WARNING

11
HOW TO ORDER REPAIR PARTS
OUR LARGE SERVICE ORGANIZATION
SPANS AMERICA
INSTALLATION AND SERVICE INFORMATION
ARE AVAILABLE 6 DAYS A WEEK
CALL OUR TOLL FREE NUMBER - 1-800-528-2806
HOURS 7:00 TO 3:30 p.m. (Mountain Std. Time)
MONDAY Through SATURDAY
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
6Use SAE 30 Oil (Never use grease or silicone spray).
zRepeat ALL procedures.
Do not lubricate motor. Motor bearings are rated for continuous operation.
Inspect and service whenever a malfunction is observed or suspected.
CAUTION: BEFORE SERVICING, ALWAYS DISCONNECT OPERATOR FROM POWER SUPPLY.
Check at the intervals listed in the following chart.
EVERY EVERY EVERY
ITEM PROCEDURE 3 MONTHS 6 MONTHS 12 MONTHS
Drive Chain Check for excessive slack.
Check & adjust as required.
Lubricate.* z z
Sprockets Check set screw tightness z z
Fasteners Check & tighten as required z z
Manual Disconnect Check & Operate z z
Bearings & Shafts Check for wear & lubricate z z

SINGLE PHASE SCHEMATIC DIAGRAM
4356
12
43
21
65
L2
(YE)
(PUR)
(BL)
EXTERNAL
STOP
345 T1
24VAC
SEC.
PRI.
AUX. CLOSE
LIMIT SWITCH
NC C
1
7
10
OPEN
SAFETY EDGE
OPEN & CLOSE LIMIT SWITCH
AUX. OPEN
C
NO
NC
LIMIT SWITCH
NC C
TO MOTOR
POWER IN L1
1 PHASE
INTERLOCK
OP
R1
OP
OP
CL
CL OP
CL
OP
14
13
OVERLOAD
R1
OPEN & CLOSE
R2
R1
OPEN
CLOSE 2
14
13
CL
CL LIMIT SWITCH
NC
CLOSE
C
R1
(BK)
(BK)
(BK)
(BRN)
(BR)
(YEL)
(OR) (OR) (OR) (OR)
(RED) (RED)
(OR)
(YEL)
(YEL)
(PUR)
(OR)
(PUR) (PUR) (PUR) (PUR)
(P)
R3 (RED)
(YEL)
(OR)
(OR)
(SEE NOTE #1)
(PUR)
TIMER TO CLOSE
(PUR)
(OPTIONAL)
(WHEN PRESENT)
230V BRAKE
(GY) (GY)
RADIO TO
A1 A2
A2 A1
(YEL)
NUT
WIRE
8
5
YEL
BL
PUR 1
BL/BK
BL/BK
230 VOLT - 1 PHASE
MOTOR CONNECTION
NOTE:
1. Voltage same as line voltage.
IR
CNO
(R)
IR
CNO
(Y)
115V MODELS
IR (BK)
230V MODELS
(GY)
4
GY
23
(WHEN PRESENT)
115V BRAKE
8
5
YEL
BL
PUR 1
BL/BK
BL/BK
115 VOLT - 1 PHASE
MOTOR CONNECTION
4
GY
3
2
(SEE NOTE #1)
(BRN) NC C
HAND CHAIN
INTL'K SWITCH
(WHEN PRESENT)
(RED)
C2 WIRING - Constant Presssure to Close
RED WIRE ON TERMINAL #2 (Shipped from Factory)
B2 WIRING - Momentary Contact to Close
MOVE RED WIRE FROM TERMINAL #2 TO TERMINAL #3
*
CLOSE CONTROL WIRING OPTIONS
- Shipped from Factory
*
1742-1
12

13
SINGLE PHASE WIRING DIAGRAM
- Shipped from Factory
EXT.
INTLK.
AND CLOSE
TO OPEN
SAFETY
BRAKE
( WHEN REQ'D )
YELLOW
( OPTIONAL )
BL-BK
BL-BK
BL-BK
BL-BK
P
BL
Y
P
GY
Y
GY
BL
BL-BK
BL-BK
TO MOTOR
PURPLE GREY BLUE
115V. CONNECTION
2
5
4
8
1
3
1
8
5
4
3
2
( WHEN REQUIRED )
STOP
ORANGE
115V. BRAKE
( WHEN REQUIRED )
230V. BRAKE
SOLENOID SOLENOID
1
GREY
ORANGE RED
OPEN
CLOSE
32
PURPLE PURPLE ORANGE
RED
4
ORANGE YELLOW
BROWN
CLOSE
PURPLE
PURPLE
INTERLOCK
RED
ORANGE
ORANGE
C NO R1
RELAY
NC
RED
BLACK
ORANGE
YELLOW
3
1OPEN
A1
5
13
WHITE
PURPLE
BLUE
PURPLE
YELLOW
RED
GREY
1
A1
13
3
5
WHITE
SEE NOTE 2
BLACK
WHITE
YELLOW
4
2
A2
6
14
PURPLE
PURPLE
SUPPLY
SUPPLY
BLACK
BLACK
2
ONLY
115V.
ONLY
230V.
A2
14
4
6RED
AUX.TERMINAL
BLOCK FOR RADIO
OPEN
C
L/S NC
AUX.OPEN
C
L/S NC
NO
RECEIVER
RADIO
ORANGE
ORANGE
R3
PURPLE
ORANGE
YELLOW
RED
RED
R2
R1
YELLOW
ORANGE
GROUND
1 PHASE
POWER IN
L1
L1
YELLOW
5 7
ORANGE
BROWN
YELLOW
10
GREY BLACK
L2
L3L2
WHITE BLACK WHITE
OVER LOAD
WIRE NUT
NO
BLACK
PURPLE
RED
YELLOW
IR
RELAY
NC
ORANGE
BLACK
BLACK
BLACK
LOAD
24VAC
YELLOW
WHITE
T1
C
LINE
( OPTIONAL )
SAFETY
PURPLE
TO TERMINAL #3
GREY
GREY
BLACK
BROWN
PURPLE
PURPLE C
NC L/S
CLOSE
C
NC L/S
PURPLEPURPLE
TO TERMINAL #2
TIMER
CONTACTOR
CLOSE
LIMIT SWITCHES
OPEN
LIMIT SWITCHES
230V. CONNECTION
SEE NOTE
BELOW
EDGE
*
**
**
**
C2 WIRING:
Constant Presssure to Close
RED WIRE ON TERMINAL
#2 (Shipped from Factory)
B2 WIRING:
Momentary Contact to Close
MOVE RED WIRE FROM
TERMINAL #2 TO TERMINAL #3
*
CLOSE CONTROL
WIRING OPTIONS
*
NOTES:
1) TO REVERSE MOTOR DIRECTION: INTERCHANGE PURPLE &
GRAY MOTOR LEADS AT CONTACTOR 1 & 3.
2) WIRE MUST BE REMOVED FOR 23OV 1PH OPERATION.
**- Transformer Primary & Relay Voltage same as Line Voltage.
1742-1

4356
12
43
21
65
L3
L2
(GY)
(PUR)
(YEL)
EXTERNAL
STOP
345 T1
24VAC
SEC.
PRI.
AUX. CLOSE
LIMIT SWITCH
NC C
1
7
10
OPEN
SAFETY EDGE
OPEN & CLOSE LIMIT SWITCH
AUX. OPEN
C
NO
NC
LIMIT SWITCH
NC C
TO MOTOR
POWER IN
L1
3 PHASE
INTERLOCK
OP
R1
OP
OP
CL
CL OP
CL
OP
14
13
OVERLOAD
R1
OPEN & CLOSE
R2
R1
OPEN
CLOSE 2
14
13
CL
CL LIMIT SWITCH
NC
CLOSE
C
R1
(BK)
(BK)
(BK)
(BRN)
(BR)
(YEL)
(OR) (OR) (OR) (OR)
(RED) (RED)
(OR)
(YEL)
(YEL)
(PUR)
(OR)
(PUR) (PUR) (PUR) (PUR)
(PUR)
R3 (RED)
(BRN)
(YEL)
(OR)
(OR)
(SEE NOTE #1)
(PUR)
TIMER TO CLOSE
(PUR)
(OPTIONAL)
(WHEN PRESENT)
230V BRAKE
(GY) (GY)
RADIO TO
A1 A2
A2 A1
(YEL)
NUT
WIRE
2
3
YEL
BRN
BRN
PUR
GY 1
6
9
BL/BK
BL/BK
O/L
4
7
85
(WHEN PRESENT)
230V BRAKE
2
3
YEL
BRN
BRN
PUR
GY 1
6
9
BL/BK
BL/BK
O/L
4
7
85
230 VOLT - 3 PHASE
MOTOR CONNECTION 460 VOLT - 3 PHASE MOTOR CONNECTION
(SEE NOTE #2)
- SEE NOTE #2
*
**
(BK) (BK)
OVERLOAD
(SEE NOTE #2)
NC C
HAND CHAIN
INTL'K SWITCH
(WHEN PRESENT)
(BRN)
(WHEN PRESENT)
575V BRAKE
BRN
BRN
3BL/BK
BL/BK
O/L
1
2*
YEL
PUR
GY
575 VOLT - 3 PHASE
MOTOR CONNECTION
(RED) (RED)
C2 WIRING - Constant Presssure to Close
RED WIRE ON TERMINAL #2 (Shipped from Factory)
B2 WIRING - Momentary Contact to Close
MOVE RED WIRE FROM TERMINAL #2 TO TERMINAL #3
*
CLOSE CONTROL WIRING OPTIONS
- Shipped from Factory
*
NOTE:
1. Voltage same as line voltage
2. Overload in motor for models up to 3/4 Hp, located in limit box for 1 Hp and above.
14
THREE PHASE SCHEMATIC DIAGRAM 1742-3

15
THREE PHASE WIRING DIAGRAM 1742-3
C NO NC
R1
RELAY
BRAKE
( WHEN REQ'D )
YELLOW
( OPTIONAL )
BL-BK
BL-BK
TO MOTOR
PURPLE GREY
ORANGE GREY ORANGE RED PURPLE PURPLE ORANGE
RED
ORANGE YELLOW BROWN
PURPLE
PURPLE
INTERLOCK
RED
ORANGE
ORANGE
RED
ORANGE
ORANGE
3
1OPEN
A1
5
13
WHITE
PURPLE
PURPLE
YELLOW
RED
GREY
1
A1
13
3
5
BLACK
YELLOW
4
2
A2
6
14
PURPLE
PURPLE
BLACK
2
A2
14
4
6
AUX.TERMINAL
BLOCK FOR RADIO
OPEN
C
L/S
NC
AUX.OPEN
C
L/S
NC
NO
RECEIVER
RADIO
ORANGE
R3
PURPLE
ORANGE
YELLOW
RED
RED
R2
R1
YELLOW
ORANGE
YELLOW ORANGE BROWN YELLOW
GREY
BLACK
WIRE NUT
LOAD
24VAC
YELLOW
BLACK XFMR
LINE
( OPTIONAL )
SAFETY
PURPLE
TO TERMINAL #3
GREY
GREY
BLACK
BROWN
PURPLE
PURPLE
C
NC L/S
CLOSE
C
NC L/S
PURPLE
TO TERMINAL #2
TIMER
PURPLE
BLACK
BLACK
BLACK BLACK
T1 L1
L2
T2
T3 L3
95
96
OVERLOAD
( 1 HP & ABOVE ONLY )
BROWN
ORANGE
BLACK
BROWN
BROWN
BROWN
( 3/4 HP & BELOW)
BROWN
( 1 HP & ABOVE )
( 3/4 HP & BELOW )
( 3/4 HP & BELOW )
SEE NOTE:
EXT.
INTLK.
AND CLOSE
TO OPEN
SAFETY
STOP
1
OPEN
CLOSE
32 4
GROUND
3 PHASE
POWER IN
L1
L1
5 7 10
L2
L3L2
EDGE
*
CLOSE
LIMIT SWITCHES
OPEN
LIMIT SWITCHES
L3
CLOSE
PURPLE
ORANGE
**
**
- Shipped from Factory
C2 WIRING:
Constant Presssure to Close
RED WIRE ON TERMINAL
#2 (Shipped from Factory)
B2 WIRING:
Momentary Contact to Close
MOVE RED WIRE FROM
TERMINAL #2 TO TERMINAL #3
*
CLOSE CONTROL
WIRING OPTIONS
*
( WHEN REQUIRED )
230V. BRAKE SOLENOID
GY
BR
Y
BR
P
460V. CONNECTION
9
36
230V. CONNECTION
8
7
1
2
4
5
BL-BK
J
BL-BK
J
GY
BR
Y
BR
P
9
36
8
7
1
2
4
5
OVERLOAD
(UP TO 3/4 HP)
BL-BK
J
BL-BK
J
( WHEN REQUIRED )
230V. BRAKE SOLENOID
OVERLOAD
(UP TO 3/4 HP)
GY
BR
Y
BR
P
575V. CONNECTION
3
1
2
BL-BK
BL-BK
J
( WHEN REQUIRED )
575V. BRAKE SOLENOID
OVERLOAD
(UP TO 3/4 HP)
NOTES:
1) TO REVERSE MOTOR DIRECTION: INTERCHANGE ANY 2 OF THE 3 POWER WIRES AT
L1, L2 & L3, OR EXCHANGE PURPLE & GRAY MOTOR LEADS AT CONTACTOR 1 & 3
(3PH UNITS ONLY).
**- Transformer Primary Voltage same as Line Voltage.

25-2006
6 Amp
25-2008
8 Amp
25-2010
10 Amp
25-2015
15 Amp
25-2025
25 Amp
25-4002-5K
1.6-2.5 Amp
25-4003-K
2.6-3.7 Amp
25-4004-K
2.5-4.0 Amp
25-4008-K
5.5-8.0 Amp
25-4011-5K
8.0-11.5 Amp
16
REPAIR PARTS KITS – ELECTRICAL BOX
OVERLOADS
OPERATOR
GH5011M
GH5021M
GH5025M
GH7511M
GH7521M
GH7525M
GH1011M
GH1021M
GH1023M
GH1043M
GH1053M
GH1025M
GH1038M
GH1511M
GH1521M
GH1523M
GH1543M
GH1553M
GH1525M
GH1538M
GH2023M
GH2043M
GH2053M
GH2038M
GH3023M
GH3043M
GH3038M
K72-12510 LIMIT SHAFT ASSEMBLY KIT
Item
L1
L2
L3
L4
L5
L6
L7
L8
Description
Limit Shaft, Standard T
Flange Bearing, 3/8” I.D.
Limit Nut
Sprocket 48B9 x 3/8” Bore
Washer, Shim 3/8” I.D. x .050 THK.
Washer, Shim 3/8” I.D. x .010 THK.
Roll Pin, 1/8 DIA. x 1” Long
E Ring, 3/8”
Qty
1
2
2
1
1
4
1
1
P/N
11-10021
12-10028
13-10024
15-48B9AXX
80-10025
80-10026
86-RP04-100
87-E-038
* COMPLETE ELECTRICAL BOX KITS
Item
1
2
3
4
5
6
7
8
9
10
11
Description
Contactor
Electrical Box (No Tabs)
Electrical Box Cover
(See Individual Components)
SPDT Interlock Switch
(See Individual Components)
24VAC DPDT Relay
(See Overloads)
(See Overloads)
Terminal Block, Radio
Terminal Block, 10 Position
Qty
1
1
1
1
1
1
1
1
1
1
1
P/N
03-8024-K
10-13900
10-10115
21-5xxx
23-10916
24-xxx-x
24-24-1
25-2xxx
25-4xxx
42-10040
42-110
* Electrical Box Kits include parts from K72-12510 and K75-12511
Below are replacement kits available for your operator. For replacement of electrical box, motor or brake components be sure
to match model number of your unit to kit number below to ensure proper voltage requirements. Optional modifications and/or
accessories included with your operator may add or remove certain components from these lists. Please consult a parts and
service representative regarding availability of individual components of kits specified below. Refer to page 11 for all repair
part ordering information.
Complete Electrical Box Replacement Kits
To order a complete electrical box replacement kit, add a
K- prefix to the model number of your operator. For
example:
GH5011M (Operator) = K-GH5011M (Elec. Box Kit)
Electrical Box Sub-Assembly Kits
K72-12510 Limit Shaft Assembly
K75-12511 Limit Switch Assembly
Complete Gear Reducer Housing Kits
See Page 18 for more information
Shaft Assembly Kits
K72-12789 Hand Chain Shaft Assembly
K72-13379 Hand Chain Shaft Assembly
K75-12783 Disconnect Assembly
Complete Brake Assembly Kits
K75-12584 115V Models
K75-12585 230-460V Models
K75-12586 575V Models
Brake Solenoid Plate Assembly Kits
K75-11034 115V Models
K75-11035 230-460V Models
K75-11036 575V Models
Motor Kits
K20-1050C2 Models GH5011M, GH5021M
K20-3050C4 Models GH5023M, GH5043M, GH5038M
K20-3050M5 Model GH5053M
K20-5150C6 Models GH5025M
K20-1075C2 Models GH7511M, GH7521M
K20-3075C4 Models GH7523M, GH7543M, GH7538M
K20-3075C5 Model GH7553M
K20-5175C6 Model GH7525M
K20-1100C2 Models GH1011M, GH1021M
K20-3100C4 Models GH1023M, GH1043M, GH1038M
K20-3100C5T Model GH1053M
K20-5110C6 Model GH1025M
K20-1150C2 Models GH1511M, GH1521M
K20-3150C4 Models GH1523M, GH1543M, GH1538M
K20-3150C5T Model GH1553M
K20-5115C6 Model GH1525M
K20-3200C4 Models GH2023M, GH2043M, GH2038M
K20-3200C5 Model GH2053M
K20-3300C4 Models GH3023M, GH3043M, GH3038M
Individual Components
21-5115 Transformer, 115V Operators
21-5230 Transformer, 230V Operators
21-5460 Transformer, 380-460V Operators
21-5575 Transformer, 575V Operators
24-115-1 Relay, 115V 1Ph Operators
24-230-5 Relay, 230V 1Ph Operators
ITEM 8 ITEM 9
Qty
1
4
2
2
4
4
8
2
2
Item
S1
S2
S3
S4
S5
S6
S7
S8
S9
P/N
10-10013
10-12553
10-12806
18-10036
23-10041
31-12542
82-PX04-20
82-PX06-16
84-LH-06
Description
Depress Plate
Nut Plate, Switch
Backup Plate
Spring, Depress Plate
Limit Switch
Standoff, Limit Switch
Screw, #4-40 Pan Head Phillips
Screw, #6-32 x 1” Pan Hd Phillips
Locknut, #6-32 Nylon Hex
K75-12511 LIMIT SWITCH ASSEMBLY KIT

17
S7
3
L8
4
S4
110
L7
2
8
6
9
7
L6
L4
L2
L3
L1
S1
S6
S8
S2
S5
S9
S3
L5
L2
5
ILLUSTRATED PARTS – ELECTRICAL BOX
11

18
REPAIR PARTS KITS – MODEL GH
Refer to the parts lists below for replacement kits available for your operator. If optional modifications and/or
accessories are included with your operator, certain components may be added or remove from these lists.
Individual components of each kit may not be available. Please consult a parts and service representative
regarding availability of individual components. Refer to page 11 for all repair part ordering information.
K75-12783 DISCONNECT ASSEMBLY KIT
ITEM PART # DESCRIPTION QTY
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
GH Disconnect Lever
Bevel Gear Yoke
Brake Release
Actuator Bracket
Switch Actuator
Disconnect Shaft
GH Tension Spring
12ft. Of Sash Chain
Screw, #8-32 x 1/4” Self Tap
Screw, #10-32 x 7/8” Long
Screw, #10-32 x 1/2” Serrated Fl.
Nut, #10-32 Serrated Flange
USS Flatwasher, 3/4”
#10 Lockwasher ZP
Cotter Pin, 1/8” x 1-3/4” Long
Roll Pin, 3/16” x 3” Black Oxide
1
1
1
1
1
1
1
1
1
2
2
2
3
2
3
1
BRAKE ASSEMBLY KITS
ITEM PART # DESCRIPTION QTY
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
Brake Hub
Brake Release Lever
Brake Disk
Spring Cup for Brake Assembly
Brake Stud
Spring, Compression x .87”
Spacer, .20” x .31” Long
Brake Pressure Plate Assembly
Brake Solenoid Assembly (115V)
Brake Solenoid Assembly (230V)
Brake Solenoid Assembly (575V)
Feather Key
Push on Fastener, 5/8” Int. Star
1
1
1
4
4
4
2
1
1
1
1
1
1
07-10179
10-10190
10-10191
11-10192
11-10193
18-10194
31-10186
75-10184
75-11034
75-11035
75-11036
80-9001
87-P-062
10-11021
10-11023
10-11024
10-11029
10-11030
11-11106
18-11007
19-8A-12
82-PX08-04T
82-SH10-14
82-WX10-08T
84-FN-10
85-FW-50
85-LS-10
86-CP04-112
86-RP06-300
K72-12789 OR K72-13379
HAND CHAIN SHAFT KIT
ITEM PART # DESCRIPTION QTY
H1
H2
H3
H4
H5
H6
H7
H8
H9
H10
H11
H12
H13
H14
H15
Bevel Gear, 5/8” ID
Bevel Gear Assy, 3/4” ID (3HP)
Bevel Gear, 3/4” ID
Bevel Gear, 3/4” ID 24 Tooth (3HP)
Hand Chain Guide
Hand Chain Shaft, GH
Bearing, 3/4” I.D.
Nyliner Bearing
Compression Spring, GH
Chain Wheel Assembly
Shim Washer, Thick
Washer, .656 I.D. x 1.25 O.D.
Roll Pin, 1/4” x 1-1/2” Long
Roll Pin, 5/16” x 1-5/8” Long
Roll Pin, 5/16” x 2-1/2” Long
E Ring, 5/8”
E Ring, 3/4”
1
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
4
08-11012
75-13334
08-11013
08-13333
10-10882
11-11105
12-10029
12-10883
18-11008
75-10884
80-10022
80-11014
86-RP08-108
86-RP10-110
86-RP10-208
87-E-062
87-E-075
INDIVIDUAL PARTS
ITEM PART # DESCRIPTION QTY
1
2
3
4
5
6
Elec. Box Mounting Bracket
Sprocket, 48B18 LGE
Sprocket, 48B18 QGH (3HP Models)
Sprocket, 50B12 LGH
Sprocket, 80B9 QGH (3HP Models)
Electrical Box
Motor
Gear Reducer
1
1
1
1
1
1
1
1
10-11045
15-48B18LGE
15-48B18QGH
15-50B12LGH
15-80B9QGH
See Page 16
See Page 16
See Var. Comp.
VARIABLE COMPONENTS
ITEM PART # DESCRIPTION QTY
B9
6
Brake Solenoid Assy (115V Opers)
Brake Solenoid Assy (230-460V Opers)
Brake Solenoid Assy (575V Opers)
Gear Reducer (1 HP Opers, 45:1)
Gear Reducer (1.5-2 HP Opers, 45:1)
Gear Reducer (3 HP Opers, 45:1)
1
1
1
1
1
1
75-11034
75-11035
75-11036
32-11009
32-11010
32-11011
COMPLETE GEAR REDUCER HOUSING KITS
ITEM PART # DESCRIPTION QTY
G1
G2
G3
Housing Support Bracket
Gear Brake Housing
Gear Brake Housing (3HP Models)
Housing Cover
2
1
1
1
10-11006
10-11026M1
10-12453M1
10-11046M1
* Gear Housing Kits also include:
K75-12788 Disconnect Assembly Kit
K72-12789 Hand Chain Shaft Kit
K72-13379 Hand Chain Shaft Kit (3HP Models)
K75-12584 Brake Assembly Kit (115V Models)
K75-12585 Brake Assembly Kit (230-460V Models)
K75-12586 Brake Assembly Kit (575V Models)
* Brake Kit Voltage same as Operator Voltage.
Up to 1HP, 115 Volts
Up to 1HP, 230-460 Volts
Up to 1HP, 575 Volts
1.5 to 2HP, 230-460 Volts
1.5 to 2HP, 575 Volts
3HP, 230-460 Volts
K75-12829
K75-12830
K75-12831
K75-12832
K75-12833
K75-12834
KIT REQUIRED FOR OPERATOR(S)
115 Volt Models
230-460 Volt Models
575 Volt Models
K75-12584
K75-12585
K75-12586
KIT REQUIRED FOR OPERATOR(S)

19
5
4
D4 D11
D12
D9
D5
1
6
2
H9
H15
H5
B9
H4
H12
H13
G1
G3
B2
H15
D13
G2
3
H2
D3
D15
D16
D13
D6
D7
D15
D8
D1
D2
D10
D14
D15
H15
H9
H6
H3
H8
H15
H9
H5
B7
B1 B4
B6
B5
H11
H7
H14
H10
H1
B11
B8
B3
B10
ILLUSTRATED PARTS – MODEL GH

OPEN TIMER TO CLOSE
3 BUTTON STATION or 3 POSITION KEYSWITCH w/ SPRING RETURN TO CENTER AND STOP BUTTON
2 OR MORE KEY LOCKOUT
R1 R2 R3
1 2 3 4
Stop
Close
Open
Stop
Close
Open
1 2 3 4
Stop
Close
Open
2 BUTTON STATION or 3 POSITION KEYSWITCH w/ SPRING RETURN TO CENTER
STANDARD
1 2 4
Close
Open
ALL CONTROL WIRING TYPES
2 OR MORE
1 2 4
Close
Open
Close
Open
OPEN / CLOSE
37
RADIO CONTROL
1 BUTTON STATION or
ANY AUXILIARY DEVICE
RESIDENTIAL RADIO CONTROLS
SENSING DEVICE TO REVERSE OR STOP
EXTERNAL INTERLOCK
310
4545
Remove Jumper
When Interlock is Used
ONE 2 OR MORE
STANDARD
1 2 3 4
Stop
Close
Open
IMPORTANT NOTES:
1) The 3-Button Control Station provided must be connected for operation.
2) If a STOP button is not used, a jumper must be placed between termianls 3 and 4.
3) Auxiliary control equipment may be any normally open two wire device such as
pullswitch, single button, loop detector, card key or such device.
Keyswitch
Sensing Device
ALL CONTROL WIRING TYPES
B2 or T1
WIRING TYPES ONLY
ALL CONTROL WIRING TYPES
T1 WIRING - RADIO TO OPEN ONLY
*
*
EXTERNAL
TERMINAL BLOCK
ALL CONTROL WIRING TYPESALL CONTROL WIRING TYPES
ALL CONTROL WIRING TYPES
TIMER TO CLOSE w/ WARNING LIGHT
ALL CONTROL WIRING TYPEST1 CONTROL WIRING ONLY
11 12
Timer Defeat
Switch
13 14
Power Supply for
Warning Light
Auxiliary Terminal Block
Warning Light will activate 15 sec. before door closes.
ALL CONTROL WIRING TYPES
ATTENTION ELECTRICIAN:
USE 16 GAUGE OR HEAVIER WIRE
FOR ALL CONTROL CIRCUIT WIRING.
SEE NOTE #2SEE NOTE #2 SEE NOTES
#2 AND #3
CONTROL CONNECTION DIAGRAM
c2000, The Chamberlain Group, Inc.
All rights Reserved
01-11091F