Chamberlain GH User manual

O W N E R ’ S M A N U A L
GH
INDUSTRIAL DUTY COMMERCIAL DOOR OPERATOR
C2 Wiring
FACTORYSET
See page 6 for
other wiring
configurations
NOT FOR RESIDENTIAL USE
Serial # Box
Installation Date
Wiring Type
2 YEAR WARRANTY

When you see these Safety Symbols and Signal Words on the
following pages, they will alert you to the possibility of serious
injury or death if you do not comply with the warnings that
accompany them. The hazard may come from something
mechanical or from electric shock. Read the warnings carefully.
When you see this Signal Word on the following pages, it will
alert you to the possibility of damage to your door and/or the
door operator if you do not comply with the cautionary
statements that accompany it. Read them carefully.
Mechanical
Electrical
TABLE OF CONTENTS
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNINGWARNING
CAUTION
WARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNINGWARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTIONCAUTION
WARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
2
SPECIFICATIONS
Carton Inventory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operator Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operator Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PREPARATION
Hand Chain Right/Left Conversion . . . . . . . . . . . . . . . . . . . . . . . 5
Disconnect Lever Right/Left Conversion. . . . . . . . . . . . . . . . . . . 5
Horizontal Mounting Conversion . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION
Mount the Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Manual Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Entrapment Protection Accessories . . . . . . . . . . . . . . . . . . . . . . 8
ADJUSTMENT
Adjust Torque Limiter Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
POWER WIRING
Power Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CONTROL WIRING
Determine Wiring Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Special Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Radio Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Additional Access Control Equipment. . . . . . . . . . . . . . . . . . . . 12
External Interlock Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TEST THE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DIAGRAMS
1 Phase Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1 Phase Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Phase Schematic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 Phase Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
OPTIONAL PROGRAMMING
Connect Reversing Edge Device (Optional). . . . . . . . . . . . . . . . .17
MAINTENANCE SCHEDULE . . . . . . . . . . . . . . . . . . . . . . . . .18
REPAIR PARTS
Repair Parts Kits - Electrical Box . . . . . . . . . . . . . . . . . . . . . . . .20
Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Repair Parts Kits - Model GH . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Model GH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Control Connection Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . .24
IMPORTANT NOTES:
• BEFORE attempting to install, operate or maintain the operator,
you must read and fully understand this manual and follow all
safety instructions.
• DO NOT attempt repair or service of your commercial door and
gate operator unless you are an Authorized Service Technician.

OPERATOR DIMENSIONS
3
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
PHASE
WEIGHTS AND DIMENSIONS
HANGING WEIGHT: 80-110 LBS.
NOTES:
1) Output shaft with 1" x 1/4" key for 1/2 thru 1HP operators, 1-3/16" x 5/16" key for 1-1/2 and 2 HP operators,
1-1/4" x 1/4" key for 3HP operators.
2) Mounting 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.
Before beginning your installation check that all components were provided.
CARTON INVENTORY
DESCRIPTION
POWERHEAD ASSEMBLY
OWNER’S MANUAL AND CAUTION LABELS
HARDWARE BOX (INCLUDES FASTENERS, DISCONNECT AND CHAIN HOIST WALL BRACKET)
3-BUTTON CONTROL STATION
HOIST HAND CHAIN
DOOR SPROCKET
DOOR/OPERATOR DRIVE CHAIN

4
OPERATOR SPECIFICATIONS
SAFETY
DISCONNECT:. . . . . . . . . . Floor level chain hoist with electrical
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.
MECHANICAL
DRIVE REDUCTION: . . . . . . . . . . . . . . . . . . . 40:1 Reduction
Heavy duty bronze worm gear reducer
OUTPUT SHAFT SPEED:. . . . . . . . . . . . . . . . . . . . . . . . . 43 RPM
DOOR SPEED:. . . . . . . . . . .4-10" per second depending on door
BRAKE: . . . . . . . . . . . . . . . . . . . . . . Solenoid actuated disc brake
HOIST WHEEL: . . . . . . . . Standard mounting on left or right side
MOTOR
TYPE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous Duty
HORSEPOWER: . . . . . . . . . . . . . . . . . . . . . 1/2, 3/4 or 1-1/2 HP
1 or 3 phase
2 HP 3 phase
SPEED: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1725 RPM
VOLTAGE: . . . . . . . . . . . . . . . . . . . . . . . . . .115/220/230 1 phase
230/460/575V 3 phase
CURRENT: . . . . . . . . . . . . . . . . . . . . . . . . See Motor Nameplate
ELECTRICAL
TRANSFORMER:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Vac
CONTROL STATION:. . . . . . . . . . . . . . . . .NEMA 3-Button Station
OPEN/CLOSE/STOP
WIRING TYPE: . . . . . . . . . . . . . . . . . . . . . . . . . . C2 (STANDARD)
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, page 8)
LIMIT ADJST: Linear driven, fully adjustable screw type cams.

5
PREPARATION
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" (13.97 cm) between frames.
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 piece outer, 1 piece 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 cotterpins on the ends of the disconnect shaft (square
shaft), move the disconnect lever arm to the opposite side, and
replace the cotterpins. Be sure to keep 12 gauge washers (2) on
the side without the lever arm.
HORIZONTAL MOUNTING CONVERSION
Remove cotterpins 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.
To prevent possible SERIOUS INJURY or DEATH:
• DO NOT connect electric power until instructed to do so.
• If the door lock needs to remain functional, install an
interlock switch.
• ALWAYS call a trained professional door serviceman if door
binds, sticks or is out of balance. An unbalanced door may
not reverse when required.
• NEVER try to loosen, move or adjust doors, door springs,
cables, pulleys, brackets or their hardware, ALL of which are
under EXTREME tension and can cause SERIOUS personal
INJURY.
• Disable ALL locks and remove ALL ropes connected to door
BEFORE installing and operating door operator to avoid
entanglement.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNINGWARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
5-1/2" (13.97 cm)
Door Sprocket
Shaft Support Bracket with
Bearing (Not Provided)
CAUTION
CONNECT REVERSING EDGE
SWITCH - SEE INSTALLATION
INSTRUCTIONS
FOR INDOORUSE ONLY
INSTALLMORETHAN8FT. ABOVEDOOR
LOCATECONTROL STATION SOTHAT DOORISWITHIN
SITE OFPERSON OPERATING THECONTROL.DOOR
MUSTBE CONTROLLEDB
Y3BUTTON STATION
Chain Guide
Hand Chain
Wheel
Cotterpin
Disconnect Lever
Cutout for Rollpin
(typical both sides)

INSTALLATION
IMPORTANT NOTE: 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 preparation on page 5. Refer to the illustrations and
instructions below that suit your application.
MOUNT THE OPERATOR
1. Wall Mount: The operator should generally be installed below
the door shaft, and as close to the door as possible (Figure 1).
Bracket Shelf Mounting: The operator may be mounted either
above or below the door shaft (Figure 2).
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.
NOTE: The optimum distance between the door shaft and operator
drive shaft is between 12" - 15" (30.5 - 38.1 cm).
2. Place door sprocket on the door shaft. Do not insert the key at
this time.
3. Place drive sprocket on the appropriate side of the operator. Do
not insert the key at this time.
4. Wrap drive chain around door sprocket and join roller chain
ends together with master link.
5. Raise operator to approximate mounting position and position
chain over operator sprocket.
6. 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.
7. Align sprockets and secure (Figure 3).
8. 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 2' (.61 m) above the floor.
9. Mount Chain Keeper / Keyhole Bracket
Using suitable hardware mount the chain keeper approximately
4' (1.22 m)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.
Typical Right Hand
Wall Mounted Operator
Optimum Distance
12 - 15"
Figure 1
Optimum Distance
12 - 15"
OPTIONAL
Mounting Bracket
P/N 08-9098
Figure 2
Be sure door
sprocket is properly
aligned with drive
before securing to
the shaft.
Chain Keeper
Figure 3 Chain Keeper
4' (1.22 m)
above floor
Optimum Distance
12 - 15" (30.5 - 38.1 cm)
Optimum Distance
12 - 15" (30.5 - 38.1 cm)
6

7
MANUAL OPERATION
This operator has provisions for manually operating the door in
case of emergency or power failure. 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 interlock
to disable the controls. 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.
INSTALLATION
To prevent possible SERIOUS INJURY from a moving chain,
ENGAGE interlock BEFORE manually operating your door.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNINGWARNING
CAUTION
WARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
Chain Keeper
(with pad locking provisions)

8
ENTRAPMENT PROTECTION ACCESSORIES
(OPTIONAL)
PHOTO EYES & SENSING EDGES
Sensing devices provided for door industry type operators with an
isolated normally open (N.O.) dry contact output are compatible
with your operator. This includes pneumatic and electric edges,
and through beam and retro reflective photo eyes. If you would
like to order or receive more information on safety devices, please
contact your local Authorized Dealer.
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.
IMPORTANT NOTES:
a. Proceed with limit switch adjustments described below before
making any sensing edge wiring connections to operator.
b. Electrician must hardwire the junction box to the operator
electrical box in accordance with local codes.
WIRING
For wiring of your sensing device to the operator, refer to the
wiring diagrams provided on pages 13 and 14. See field
connection terminals identified as sensing device or safety edge.
TAKE-UP REEL
Take-up reel should be installed 12" (30.48 cm) above the top of
the door.
COIL CORD
Connect operator end of coil cord to junction box (not provided)
fastened to the wall approximately halfway up the door opening.
ADJUSTMENT
To avoid SERIOUS personal INJURY or DEATH from
electrocution, disconnect electric power BEFORE manually
moving limit nuts.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNINGWARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
LIMIT SWITCH ADJUSTMENT
NOTE: Make sure the limit nuts are positioned between the limit
switches before proceeding with adjustments.
1. Depress retaining plate to allow nut to spin freely. After
adjustment, release plate and move nut back and forth to
ensure it is fully seated in slot.
2. To increase door travel, spin nut away from limit switch. To
decrease door travel, spin limit nut toward limit switch.
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 the limit switch is engaged as door fully seats at the floor.
INSTALLATION
To reduce the risk of SEVERE INJURY or DEATH, ALWAYS
install reversing sensors when the 3-button control station is
out of sight of door or ANY other control (automatic or
manual) is used. Reversing devices are recommended for ALL
installations.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNINGWARNING
CAUTION
WARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
SAFETY
(Aux. Close) Limit Switch
CLOSE Limit Switch
OPEN Limit Switch
Actuator
Retaining Plate
SAFETY
(Aux. Open) Limit Switch

9
ADJUST TORQUE LIMITER CLUTCH
(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 be possible to stop the
door by hand during travel.
BRAKE ADJUSTMENT
The brake is adjusted at the factory and should not need additional
adjustment for the the life of the brake assembly.
Replace brake assembly when necessary. Refer to the illustration
for identification of components for the solenoid type brake
system.
ADJUSTMENT
(3) Set
Screws
Brake Assembly
Actuator Plate
Solenoid
Brake Plate Assembly
Release Lever

10
To reduce the risk of SEVERE INJURY or DEATH:
• ANY maintenance to the operator or in the area near the
operator MUST NOT be performed until disconnecting the
electrical power and locking-out the power via the operator
power switch. Upon completion of maintenance the area
MUST be cleared and secured, at that time the unit may be
returned to service.
• Disconnect power at the fuse box BEFORE proceeding.
Operator MUST be properly grounded and connected in
accordance with local electrical codes. The operator should be
on a separate fused line of adequate capacity.
• ALL electrical connections MUST be made by a qualified
individual.
• DO NOT install ANY wiring or attempt to run the operator
without consulting the wiring diagram. We recommend that
you install an optional reversing edge BEFORE proceeding
with the control station installation.
• ALL power wiring should be on a dedicated circuit and well
protected. The location of the power disconnect should be
visible and clearly labeled.
• ALL power and control wiring MUST be run in separate
conduit.
POWER WIRING
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNINGWARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
POWER WIRING CONNECTIONS
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. NOTE: Do not install any
wiring or attempt to run this operator without consulting the
wiring diagram.
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.
NOTE: Do not turn power on until you have finished making all
power and control wiring connections and have completed the
limit switch adjustment procedure.
IMPORTANT NOTE: This unit must be properly grounded. Failure
to properly ground this unit could result in electric shock and
serious injury.
CONDUIT ACCESS
1-1/16"Diameter knockout for
power wiring conduit access
(1 nearside)
7/8"Diameter knockout for
power wiring conduit access
(2 on end panel)