INSTALLATION INSTRUCTIONS

AND

OPERATION MANUAL

MGH Series

Commercial and Industrial Door Operator

Hybrid Logic Control

Restricted Duty Operators

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IMPORTANT INSTALLATION INSTRUCTIONS
WARNING – To reduce the risk of death or serious injury to persons:
1. READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS.

WARNING! – Components under extreme spring tension can cause death or

serious injury.
WARNING
2. Install only on a properly operating and balanced door. A door that is operating improperly could
cause death or serious injury. Have trained door systems technicians make all necessary
adjustments and repairs to the door before installing the operator.

3. Remove any pull ropes that may be installed on the door.

4. Unless the door operator includes an internal lock sensing system, or external electrical interlocks
are installed, remove or make all door locks inoperative, or secure locks in the unlocked position to
prevent operation with the locks engaged.

5. Install the door operator at least 8 feet or more above the floor if the operator has exposed moving
parts. If it is installed less than 8 feet above the floor, any exposed moving parts must be covered or
guarded.

6. Do not connect the door operator to the source of power until instructed to do so.

7. Locate the control station (open-close-stop push button, key station, or the like):
a) within sight of the door
b) at a minimum height of 5 feet above the floor so small children cannot reach it, and
c) away from all moving parts of the door.

8. Install the Entrapment Warning Placard next to the control station in a prominent location.

9. Make sure the available power supply to be connected to the operator is of the same voltage,
frequency, phase and wattage as indicated on the nameplate of the operator.

10. Read and understand the wiring diagram of the operator and the control station and any other
equipment to be connected to the operator.

11. Always disconnect power whenever installing or servicing the door operator or door.

12. All wiring must be permanent and comply with National Electrical Code (NEC) and local code
requirements.

13. Any change in mounting position may result in a change of operator rotation and consequently in a
change of control functions. Consult factory for any changes.
14. If the operator is provided with an auxiliary chain operator, the hand chain must be kept inside the
chain bag when operating electrically.

15. For products having a manual release, instruct the end user on the operation of the manual release.
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SPECIFICATIONS

MOTOR
Type: Restricted cycle duty (20 cycles per hour)
Horsepower: 1/3 hp, 1/2 hp
Speed: 1700 RPM
Voltage: 115, 230 – 1 phase
208/230, 460, 575 – 3 phase
230 volt motor is suitable for use with 208 volts
(see Wiring Diagrams and Appendix 6 for wiring change instructions)
Current: See motor nameplate

ELECTRICAL
Transformer: 24VAC
Wiring Type: Momentary pressure open, stop, constant pressure close
(provided standard), with provision for momentary pressure close*

Limit Adjustment: Linear driven, fully adjustable screw type cams.

MECHANICAL
Drive Reduction: 43:1

Output Shaft Speed: 39 RPM

Door Speed: 6 - 8” per sec. average (typical)

Brake: Solenoid actuated brake

Auxiliary Chain Hoist: Standard

ENTRAPMENT PROTECTION
Sensing Edge*: (Optional) Sensing device attached to the bottom edge of the door.

Non-Contact Device*: (Optional) Photo eye device.

* Per the requirements of UL Standard 325, the door operator is setup for constant
pressure to close the door. As an alternative, the door may be provided with at least one
monitored sensing device that will reverse the door upon contact with, or upon detecting
an obstruction, during closing.
Notes:
1. A non-contact sensing device (photo eye) can only be used on doors up to 35 ft. wide (or maximum
rated range of device if less than 35 ft.). Use a sensing edge to provide entrapment protection on
doors over 35 ft. wide.
2. A sensing edge can be used on all doors without size restriction.
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TYPES AND SIZES OF DOORS

STANDARD CYCLE USAGE (up to 20,000 cycles - 20 cycles per hour max.)

MAXIMUM AREA - SQ. FT.

HP Service Doors Insulated Doors - Slats with PVC Back

24 ga. 22 ga. 20 ga. 18 ga. 24 ga. 22 ga. 20 ga. 18 ga.

1/3 300 240 200 150 215 185 160 125

1/2 425 350 300 225 325 275 240 185

Insulated Doors - Slats with Steel Back Grilles & Closures

HP 24 ga. Back 22 ga. Back

Steel or
Aluminum
Stainless
22 ga. 20 ga. 18 ga. 22 ga. 20 ga. 18 ga.
Steel

1/3 140 125 105 135 120 100 400 240

1/2 210 190 160 200 180 150 600 350

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 INSTALLATION INSTRUCTIONS

OPERATOR MOUNTING POSITIONS

RS RA

LS LA

Consult factory for changes in mounting positions.

NOTE: Any change in mounting position may result in a change of operator rotation and
consequently in a change of control functions. Consult factory for any changes. (LS and RA
mounting positions are LH operators, RS and LA positions are RH operators)

Operators mounted in alternate positions (LA, RA) require the long mounting legs in lieu of the
standard short mounting legs.

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OPERATOR MOUNTING

1. Before the operator is installed, verify that the door is properly operating and balanced.

2. Make sure the layout of the mounting holes on the bracket is correct.

3. Bolt the operator mounting plate to the door bracket plate.

4. Attach and tighten the three mounting legs to the mounting plate.

5. Mount the operator to the three legs and tighten.

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6. When the operator assembly is attached to the door bracket, be sure the door driven sprocket is
properly aligned with the operator drive sprocket before securing the driven sprocket to the shaft.

7. The bracket must provide adequate support for the operator. Prevent play between the operator and
the door shaft. The operator must be securely attached with the drive shaft parallel to the door
shaft. It may be necessary to field brace the operator/bracket.
Door
Sprocket

Operator
Drive
Sprocket

Correct

Incorrect

DRIVE CHAIN ADJUSTMENT

NOTE: Use correct type, size and proper length of roller chain.
1. Adjust the drive chain by tilting or move the operator so that there is about 1/4” of slack when the
chain is depressed.
Note: The set screws on the operator base (S1) may be used to make the adjustment.
2. Once the drive chain has been tightened and the base leg screws have been set, then tighten the
operator set screws.
Drive Chain
Door Sprocket Drive Chain
Door Sprocket

1/4"
1/4"
Drive Sprocket S1
S1 Drive Sprocket

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HAND CHAIN ADJUSTMENT
If the hand chain is too long, cut and reconnect the chain with the different color connecting link
provided. Completely close the connecting link so it is properly aligned.

BRAKE RELEASE LEVER (MG E)

Releasing the door operator brake, or loosening or removing any part of the
door operator drive system, can cause the door to close and cause death or
serious injury. Do NOT release the brake, or loosen or remove any part of
WARNING the door operator drive system, unless the door is closed, or the curtain is
secured in the open position to prevent uncoiling.

1. Pressing the brake release lever will release the motor brake and can cause the door to move
uncontrolled.
2. Microswitch SW2 is activated when the brake release lever is pressed – see wiring diagrams for
details.
3. Open-close-stop controls do not function while the brake release lever is pressed.

NOTE: A door sprung for emergency egress can open when the brake release lever is pressed.

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LIMIT SWITCH ADJUSTMENT

Make sure the limit cams are positioned between the limit switch actuators before proceeding
with adjustments.

1. Open the control panel cover.

2. Open or close the door part way to determine the direction of travel of the limit switch cams.

3. Open or close the door to the desired position.

Disconnect power before adjusting limit switch cams.

WARNING
4. While pressing the spring-loaded plate (G), which holds the limit switch cams in place, adjust the limit
switch cam (E or F) until the micro switch (C or D) clicking sound is heard.

5. If the limit switch cam cannot be rotated to its desired position, release the plate and move the door
away from the desired position, then adjust the limit switch cam to its desired position. It may be
necessary to repeat this step until the exact position has been reached.

6. Repeat step 3 and 4 for the opposite direction. Adjust close limit cams so that actuator is engaged as
door fully closes to the floor.

7. “B” is usually the sensing edge cut-off switch and can be adjusted to accommodate sensing edge
cut-off position. It is recommended that the switch position be adjusted as low as possible without
interfering with close limit switch function.
F
G
E
B
D
A
C
NOTE: “C” is usually the open limit switch and “D” is usually the close limit switch.

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WIRING INSTRUCTIONS

 Disconnect power at the fuse box before proceeding with any wiring.
WARNING
1. Do not install any wiring or attempt to run this operator without checking the wiring diagram located
on the inside of the control box cover.

2. Do not turn on power until you have finished making all power and control wiring connections.

3. Do not run power and control wiring in the same conduit.

4. Any wire connected to the control panel must be protected by conduit or other means to ensure the
safety and permanency of the wiring.

5. Use copper wire inside the control panel.

6. A separate fuse line of adequate capacity is needed for the operator.

7. The operator must be properly grounded. The ground screw, painted green, is located inside the
control panel.

Failure to properly ground the operator could result in electric shock and
death or serious injury.
WARNING
Unless the operator includes an internal lock sensing system, or external
electrical interlocks are installed, remove or make all door locks inoperative,
or secure locks in the unlocked position. Failure to disable the locks could
WARNING result in damage to the door or operator.

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CONTROL WIRING
If the door is not visible from the control station, or if any device other than a
control station requiring constant pressure to close the door is used, a
monitored sensing device must be installed on the door. Failure to do so
WARNING could result in serious injury or death to person(s) trapped beneath the door.

1. Complete limit switch adjustments before making any sensing edge/non-contact device wiring
connections to the operator.

Photo Eye
Sensing Edge

6" max. above floor

Monitored Sensing Device Options:

Sensing Device Type Device Manufacturer Model
ASO GE225 [A2525L-M], GE125 [A1525-M]
ME110*, ME111*, ME120*, ME123*, ME112*,
ELR ME113*, ME116*, ME117*
2-wire terminated Miller Edge Inc.
sensing edge * Must have model number with MT21*, MU21*, MT22*, MU22*, MC22*, MU33*,
Suffix T2. MC271*, CPT223*
MEL

IR Optical photo eyes and optical sensing edge, Models

Emitter/receiver FRABA Inc. OPTOEYE [FOPE], OPTOEDGE; Part Nos. OSE-T,
photo eyes and OSE-R, OSE-P, OPE.
sensing edge Martec Access Products Inc. 1266
Other approved devices may also be available – consult manufacturer for compatibility. [denotes Lawrence reference]
Note: Refer to sensing device manufacturer for specific installation and maintenance requirements.
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2. If more than one monitored sensing device is to be used, each device must be connected to a
separate ELR/IR sensing module to provide separate monitoring functions. Consult factory for a
multiple device adapter.
Do not install a timer to close the door unless some type of monitored
entrapment protection device has been installed. Failure to do so may result
WARNING in death or serious injury to person(s) trapped beneath the door.
3. If a timer to close (reclose timer) is to be used, a compatible reclose timer module is required that
will not interfere with the monitoring of sensing device functions. Consult factory for the correct
reclose timer module.

Disconnect power at the fuse box before proceeding with any wiring.
WARNING
4. Locate the control station at a minimum height of 5
feet above the floor, and where the user can clearly
see the operation of the door. Mount the enclosed
placard adjacent to or near the door.

Min. 5 ft.

Controls shall be located far enough away from the door, or positioned
such that the user is prevented from coming in contact with the door, while
WARNING operating the controls.

5. Do not run control wiring in the same conduit as power wiring.

6. Any wires connected to the control panel must be protected by conduit or other means to ensure the
safety and permanency of the wiring.

Do not install radio controls (receiver/transmitter) to operate the door

unless some type of monitored entrapment protection device has been
WARNING installed. Failure to do so may result in death or serious injury to person(s)
trapped beneath the door.

Changing from left hand to right hand or vice versa could result in change
of control wiring. Consult factory for details.
WARNING
7. After installation, be sure that the operator, controls, and sensing edge or other entrapment
protection devices have been tested and function properly.

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NOTE A :

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NOTE A :

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Reference

MG series terminal connections

1 2 3 4 7 8 9 10 31 32 33 34 35
Control Station + - External Interlock
Stop Open Close Com Door moving Jump when no 24VAC,
warning signal external interlock 0.5A max.
24VDC* is connected.
™ A one-second delay on reverse is standard.
™ When the door is closing, pushing the “Open” or “Stop” button will stop the door from moving.
™ When the door is closing, the radio control transmitter can stop and reverse the door at anytime.

*Jump Pin Connections (Hybrid Main Board)

JP1 Factory Default: Momentary pressure open (Jumped). Remove jumper for constant pressure open.
JP2 Factory Default: Open and close warning signal (Jumped). Remove jumper for close warning signal only.

Monitored Sensing Device connection

(Only 1 monitored device can be connected to a single sensing module)

E5 & E6 – Connect 2-wire terminated sensing edge (ELR device)

P5 & P6 – Connect emitter/receiver photo eye or optical sensing edge (IR device)

Control and Accessory connections

Refer to appendix illustrations for connection of:
™ Multiple device adapter for secondary monitored sensing device
™ Reclose timer module
™ Single and multiple control stations
™ External timer defeat switch
™ Wiring change from 230V to 208V 3 phase operator
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IMPORTANT SAFETY INSTRUCTIONS

WARNING –To reduce the risk of death or serious injury:

1. READ AND FOLLOW ALL INSTRUCTIONS.

2. Never let children operate or play with door controls. Keep the remote control (when provided)
away from children.

3. Personnel should keep away from a door in motion and keep the moving door in sight until it is
completely closed or opened. NO ONE SHOULD CROSS THE PATH OF A MOVING DOOR.

4. Test sensing devices at least once a month. Also test sensing devices after making any
adjustments to the close limit. Failure to adjust the operator properly may cause death or serious
injury.

5. For operators having an auxiliary release, use caution when using the release if the door is open.
Weak or broken springs may cause the door to fall rapidly, causing death or serious injury.

6. KEEP DOORS PROPERLY OPERATING AND BALANCED. See door manufacturer’s Operation
and Maintenance Instructions. An improperly operating or unbalanced door could cause death or
serious injury. Have trained door systems technicians make all necessary adjustments and
repairs.

7. SAVE THESE INSTRUCTIONS.

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OPERATING INSTRUCTIONS
1. If a 3-button control station is used to operate the door, push the “OPEN” button to open the door,
push the “CLOSE” button to close the door, push the “STOP” button to stop movement of the door
while opening or closing. With constant pressure close operation, removing pressure from the
“CLOSE” button will also cause the door to stop.

2. If a key switch control station is used to operate the door, turn the key to the “OPEN” position to
open the door, turn the key to the “CLOSE” position to close the door, push the “STOP” button to
stop movement of the door while opening or closing. With constant pressure close operation,
removing pressure from the “CLOSE” key position will cause the door to stop.

3. Door may also be operated by remote devices.

IMPORTANT NOTE: If one or more monitored sensing devices are installed, and determined by the
operator to be not functioning properly, the door will either stay open, or re-open if closing. If this
occurs, contact a trained door systems technician to make repairs. Until repairs can be made, the
door can be opened and closed from the 3-button or key switch control station, but will require
constant pressure on the close control to close the door.

EMERGENCY MANUAL OPERATION

This operator has provisions for manually operating the door in case of emergency or power failure.
This operator is equipped with an auxiliary chain hoist (or optional auxiliary crank).

To operate the auxiliary chain hoist:

1. Remove the hand chain from the chain bag.
2. Pull the hand chain to operate the door in the desired direction. (No clutch to engage)

Put the hand chain back into the chain bag before operating the door again electrically.

Turn off power to the operator before manually operating the door.
WARNING
Hand chain must be kept inside chain bag when operating electrically.
WARNING
To operate the auxiliary crank:
1. Insert the awning crank handle onto the operator crank.
2. Turn the awning crank to operate the door in the desired direction. (No clutch to engage)

Turn off power to the operator before manually operating the door.
WARNING
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MAINTENANCE INSTRUCTIONS

The brake is a self-adjusting brake. It is maintenance free. The brake assembly requires no
additional adjustments for its lifetime.

If an entrapment protection device is used, i.e. sensing edge or photoelectric sensors, please consult
the manufacturer for maintenance instruction.

Disconnect power supply to the operator before servicing.

WARNING
Check the following items at the intervals listed:
EVERY EVERY EVERY
CHECK LIST DESCRIPTION 3 MONTHS 6 MONTHS 12 MONTHS
Check for excessive slack.
Drive Chain Check & adjust as required ●
Lubricate.

Sprockets Check set screw tightness ●

Fasteners Check & tighten as required ●
Bearings & Shafts Check for wear & lubricate ●
™ Do not lubricate motor. Lubrication could cause damage.
™ Inspect and service whenever a malfunction either door or operator is observed or suspected.
™ Before servicing, always disconnect power supply to the operator.
™ Replace fuses only with those of the same type and rating.
™ All replacement parts must be compatible with those originally provided. Consult
manufacturer for replacement parts.

Do not place hands or tools in or near the operator when the power is
connected or when testing control or sensing devices. Always disconnect
WARNING power before servicing or adjusting the operator.

U.S. GEAR
Covered under US Pat. #6,900,602, #7,055,283, #7,341,129 and additional patents pending.

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APPENDIX 1
ND
Multiple Device Adapter With 2 ELR/IR Instructions
Warning: Power OFF When Connecting. QST-HB-ADAPTER-2

Part No:
GW40-05-1

Harness

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APPENDIX 2
GW40-10
Warning: Power OFF When Reclose Timer Module Instructions QST-HB-TIMER-4
Connecting.

Contents:
Reclose Timer Module
Plastic Stand-off X1 Jumper Wire
X1 X1

Part No:

B A A BEE-IDIL0-31101

Part No:
FEE-I0PB3-HB004

Jump to Enable Timer

Turn Knob to Adjust Time Part No:
BEE-I0WI0-HYB03

A B

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APPENDIX 3
Control Connections Diagrams

Control Wiring for 3 Button Stations Control Wiring for Key Switch with Stop Button
1 Set of 3 Button Stations Key Switch with Stop Button

1 2 3 4 1 2 3 4

3-1 BUTTON KEY SWITCH

1 1

2 Key switch
OPEN GR
BK
OPEN WH
2
2 BK
R OPEN OPEN COM CLOSE OPEN
GR
R
3 3 C C OPE N CLOSE

CLOSE
WH CLOSE
3 CLOSE WH
CLOSE NO NO

4
STOP
4 STOP NC NC S S
WH T T
STOP
4 O
P
O
P

STOP 1
STOP

2 Sets of 3 Button Stations Key Switch (with Stop Button) and 3 Button Stations

1 2 3 4 1 2 3 4

3-2 BUTTON KEY SWITCH 3-1 BUTTON

1 1
B1 B1
2 2
OPEN OPEN
GR WH GR GR WH
B2 Key switch
BK BK BK
OPEN B2 CLOSE OPEN
2 2 OPEN 2 GR
B1 R R C C
3 OPEN OPEN OPEN
CLOSE B2
COM BK WH
WH B2
B2 3 3 3 3
NO NO
CLOSE
CLOSE CLOSE CLOSE CLOSE

B1 NC NC
WH
4 4 4 CLOSE 4
STOP STOP STOP R STOP STOP
B2 B1 1 1 1 STOP
4
STOP STOP
B2 B1
B2
B1 B2 B1 R

Warning !
Please Remove Warning !
Jump Pin First Please Remove
See "A" Jump Pin First
See "A"

OPEN OPEN
OPE N CLOSE

"A" "A"
CLOSE CLOSE
Remove Remove
Jump pin Jump pin
STOP STOP S S
T T
O O
P P

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APPENDIX 4
Control Connections Diagrams

Wiring 3 Button Stations With Key Lockout

1 Set

1 2 3 4

KEY LOCKOUT 3 BUTTON

1
Key switch WH

BK
GR
2
OPEN OPEN OPEN

CLOSE CLOSE

3
CLOSE
STOP STOP

OFF OFF

ON KEY ON

4
STOP

With and without key lockout

1 2 3 4

KEY LOCKOUT 3-2 BUTTON

1 WH
STOP STOP
B1 B2 BK
GR
B1
2 BK GR
OPEN WH
BK
B2 OPEN R OPEN OPEN OPEN
Key switch
OPEN
WH
B2
3 CLOSE CLOSE CLOSE CLOSE
CLOSE

B1
R
CLOSE STOP STOP STOP STOP

WH OFF OFF
4 WH
ON KEY ON
WH
B1

B2

Ceiling Pull Switch Station

WH
R3 R2 R1 1 2 3 4 GR

R3 R2 R1

1 3 2 1 R1 R2

CLOSE/OPEN JUMP

CLOSE/OPEN
RADIO
4

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APPENDIX 5

PK
PK

OFF
ON
1
NO
2

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APPENDIX 6

Wiring Change Instruction from 230V to 208V 3 Phase Operator

Hybrid MG Series MG-HB-3P-V01

REMOVE
(FACTORY INSTALLED FOR 230V) Insulate
R
the wire
CONNECT (FOR 208V)
R Y

R R R R R

7L4 7L4
R R Y

1. Remove RED wire from transformer to contactor 2. Add spade to end of loose YELLOW wire and connect
(factory installed for 230V) and insulate end of wire. to contactor (for 208V).

SLEEVE : "FOR 208V CONNECT YELLOW WIRE IN

PLACE OF RED WIRE - SEE WIRING DIAGRAM"

R
Y
Y 208V

R
208V

7L4
7L4

3. Completed.

Y
R
208V

7L4

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