Chamberlain LiftMaster MJ5011U User manual

MEDIUM DUTY DOOR OPERATOR
MODELS MJ5011U, MH5011U, MHS5011U, & MGJ5011U
INSTALLATION MANUAL
NOT FOR RESIDENTIAL USE
Now with
Built in
Radio Receiver
315 MHz
Now with
Built in
Radio Receiver
315 MHz
Now with
Built in
Radio Receiver
315 MHz
Now with
Built in
Radio Receiver
315 MHz
Now with
Built in
Radio Receiver
315 MHz
Now with
Built in
Radio Receiver
315 MHz
Your model may look different than the model illustrated in this manual.
THIS PRODUCT IS TO BE
INSTALLED AND SERVICED BY A
TRAINED DOOR SYSTEMS
TECHNICIAN ONLY.
Visit www.liftmaster.com to locate a
professional installing dealer in your area.
Serial #
(located on electrical box cover)
Installation Date
2 YEAR WARRANTY
OPERATOR RATING: 12 cycles per hour,
50 cycles per day; maximum

2
SAFETY INFORMATION 3
APPLICATION 4
OPERATOR SPECIFICATIONS 5-6
Weights and Dimensions . . . . . . . . . . . . . . . . . . . 5
Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . 6
CARTON INVENTORY 6
PREPARATION 7
Preparing Your Door. . . . . . . . . . . . . . . . . . . . . . 7
Handing Identification . . . . . . . . . . . . . . . . . . . . . 7
ASSEMBLY 7
TYPICAL INSTALLATION 8-14
Determine Mounting Location for Operator . . . . . . . . . . 8
Install the Operator . . . . . . . . . . . . . . . . . . . . . 8-9
Install Emergency Disconnect System . . . . . . . . . . . . .10
Power and Ground Wiring Connections . . . . . . . . . . 11-12
Install 3-Button Control Station . . . . . . . . . . . . . . 12-13
Setup Radio Antenna . . . . . . . . . . . . . . . . . . . 13-14
ADJUSTMENT 15
Adjust the Limits. . . . . . . . . . . . . . . . . . . . . . . .15
Adjust the Clutch. . . . . . . . . . . . . . . . . . . . . . . .15
ENTRAPMENT PROTECTION 16-19
LiftMaster Monitored Entrapment Protection (LMEP) . . . . .16
Install the Photoelectric Sensors. . . . . . . . . . . . . . . .17
Mount the Photoelectric Sensors . . . . . . . . . . . . . . .18
Entrapment Protection Wiring Options . . . . . . . . . . 18-19
LOGIC BOARD LAYOUT 19
BASIC PROGRAMMING 20-23
Determine the Wiring Type . . . . . . . . . . . . . . . . 20-21
Remote Controls. . . . . . . . . . . . . . . . . . . . . . 21-22
Timer-to-Close (TTC) . . . . . . . . . . . . . . . . . . . 22-23
TESTING 23
EMERGENCY DISCONNECT 24
TROUBLESHOOTING 25-26
DIAGRAM 26
ACCESSORIES 27
CONTROL CONNECTION DIAGRAM BACK COVER
TABLE OF CONTENTS

3
SAFETY INFORMATION
Mechanical
Electrical
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
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.
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.
To reduce the risk of SEVERE INJURY or DEATH:
IMPORTANT INSTALLATION INSTRUCTIONS
1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND
INSTRUCTIONS.
2. Install door operator ONLY on properly balanced and
lubricated door. An improperly balanced door may NOT
reverse when required and could result in SEVERE INJURY or
DEATH.
3. ALL repairs to cables, spring assemblies and other hardware
MUST be made by a trained door systems technician BEFORE
installing operator.
4. Disable ALL locks and remove ALL ropes connected to door
BEFORE installing operator to avoid entanglement.
5. Install door operator 8 feet (2.44 m) or more above floor.
6. NEVER connect door operator to power source until
instructed to do so.
7. NEVER wear watches, rings or loose clothing while installing
or servicing operator. They could be caught in door or
operator mechanisms.
8. Install control station:
• within sight of the door.
• out of reach of children at minimum height of
5 feet (1.5 m).
• away from ALL moving parts of the door.
9. Install the control station far enough from the door to
prevent the user from coming in contact with the door while
operating the controls.
10. Install the entrapment warning placard on wall next to the
control station in a prominent location that is visible from
the door.
11. Place manual release/safety reverse test label in plain view
on inside of door.
12. Upon completion of installation, test entrapment protection
device.
13. SAVE THESE INSTRUCTIONS.
WARNING
WARNING
WARNING
WARNING

4
SECTIONAL DOOR ROLLING DOOR
SQ. FT
24 ga. Steel 22 ga. Steel --- 20 ga. Steel
18 ga. Steel
16 ga. Steel
Aluminum Grilles Aluminum Doors ---
20 ga. Steel
Insulated
---
Fiberglass Aluminum Doors Wood Doors
NOTE: On steel insulated doors, a 24 ga. Back panel is assumed.
This operator includes a number of features that will provide years
of reliable and safe operation.
FEATURES:
• Supports both monitored and non-monitored entrapment
protection devices: Entrapment protection devices detect
obstructions in the door's path and automatically reverse a
closing door.
• Radio receiver: A factory installed radio receiver allows remote
controls, keyless entries and other remote command devices to
be programmed to the operator.
• Timer-To-Close: The Timer-to-Close feature allows the door to
automatically close after a preset time (only available with B2
wiring and a monitored entrapment protection device).
• Wiring Types: The functionality of the operator is based on the
wiring type. The operator is shipped from the factory in standard
C2 wiring type (factory default). Some wiring types will require
an optional monitored entrapment protection device. Refer to
Basic Programming Section for descriptions of wiring types,
requirements and programming.
Intended for use on vertical or high-lift sectional doors, or rolling door products. The MHS operator is recommended for rolling sheet
doors. Not recommended for use on a standard lift sectional door.
Photoelectric Sensors
APPLICATION
---
--- 24 ga. Steel 20 ga. Steel --- 16 ga. Steel
Insulated
24 ga.
22 ga. Steel
20 ga. Steel --- 16 ga. Steel ---
--- --- ---
24 ga. Steel
Insulated
--- --- --- 20 ga. Steel
Insulated
16 ga. Steel
Insulated
320 275 250 200 160 120
MAXIMUM DOOR AREA (SQUARE FEET)

5
9.196"
(23.36 cm)
7.00"
(17.78 cm)
9.25"
(23.50 cm)
MOUNTING DIMENSIONS
12.62"
(32.05 cm)
3.00"
(7.62 cm)
11.00"
(27.94 cm)
12.56"
(31.90 cm)
4.75"
(12.07 cm)
MODELS MH, MJ, AND MHS
Hanging Weight: 60-70 LBS. (27.22-31.75 kg)
MODEL MGJ ONLY
Hanging Weight: 60 LBS. (27.22 kg)
A
A
A
A
B
B
B
B
6.34"
(16.1 cm)
Hand Chain Wheel present
with Model MH only.
7.19"
(18.26 cm)
12.69"
(32.23 cm)
MOUNTING DIMENSIONS
A - Wall Mounting
B - Bracket Mounting (rolling door)
6.34"
(16.1 cm)
12.15"
(30.86 cm)
15.78"
(40.03 cm)
18.87"
(47.93 cm)
3.1"
(7.87 cm)
3.25"
(8.26 cm)
6.13"
(15.57 cm)
9.19"
(23.34 cm)
6.5"
(16.51 cm)
7"
(17.78 cm)
14.75"
(37.47 cm)
5.50"
(13.97 cm)
OPERATOR SPECIFICATIONS
WEIGHTS AND DIMENSIONS

6
MOTOR
TYPE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limited duty
HORSEPOWER: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/2 HP
VOLTAGE: . . . . . . . . . . . . . . . . . . . . . 115 Vac, Single Phase, 60 Hz
OPERATOR
CURRENT (Amperage):
Voltage-Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1/2 HP
115-1Ø, 60Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2
ELECTRICAL
OPERATOR VOLTAGE: . . . . . . . . . . . 115 Vac, Single Phase, 60 Hz
WIRING TYPE: . . . . . . . . . . . . . . . . C2 (Standard) B2 Configurable
(See Basic Programming Section)
CONTROL WIRING: . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-22 AWG
SAFETY
DISCONNECT:
MH . . . . . . . . . . . . . . . . . . . . . . . . . . Floor level chain hoist for
manual chain hoist operation.
MJ. . . . . . . . . . . . . . . . . . . . . . . . . . . Floor level disconnect for
manual operation.
MHS . . . . Both MH and MJ type disconnects described above.
MGJ . . . . . . . . . . . . . . . . . . . . . . . . . Floor level disconnect for
manual operation.
ENTRAPMENT PROTECTION:
LiftMaster Monitored Entrapment Protection (LMEP)
Photoelectric Sensors (CPS-U): . . . . . . . . . . . . . . . Through beam
used to provide non-contact safety protection.
Safety Edge (Optional): . . . . . . . . . Electric or pneumatic sensing
device attached to the bottom edge of door.
(see Accessory Page 27)
MECHANICAL
DOOR SPEED:. . . . . . . . . . . . . .Approximately 9" (23 cm) / second
depending on door setup
OUTPUT FORCE:. . . . . . . . . . . . . . . . . . . . . . . . . .125 ft. lbs / sec.
MGJ ONLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 ft. lbs / sec.
OUTPUT RPM:
MJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 RPM
MH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 RPM
MHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38.6 RPM
MGJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 RPM
LIMIT ADJUST:. . . . . . . . . . . . Fully adjustable up to 14' door Max
DUTY: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Cycles per Hour Max
50 Cycles per Day Max
DRIVE TRAIN:. . . . . . . . . . . . . . . . . . . . Maintenance Free Bearings
MGJ ONLY . . . . . . . . . . . . . . . . . . . Maintenance Free Bearings
Wormgear-in-Oil-Bath Reducer
FINISH: . . . . . . . . . . . . . Powder coated, Corrosion Resistant Steel
ENVIRONMENTAL
LOCATION: . . . . . . . . . . . . . . . . . . . . . . . . . . . .Indoor, dry location
OPERATING TEMPERATURE: . . . . . . . . . . . . . . . . .-4˚ F to + 122˚ F
(-20˚ C to + 50˚ C)
UL Listed to 40˚ C: Chamberlain tested to 50˚ C
OPERATOR SPECIFICATIONS
Before beginning your installation check that all components were provided. Your model may look different than the model illustrated.
CARTON INVENTORY
^
OPEN
^
CLOSE
O
STOP
NOT SHOWN
Installation Manual
Quickstart Guide
User’s Guide
Entrapment Warning Placard
Installation Hardware Bag, Complete with: Master links (2), Wall bracket (1), Fastener Bag (1)
Door sprocket
3-Button Station
Operator
Warning Placard
Operator Drive
Sprocket
Door/Operator
Chain
Hoist Hand Chain
Models MH and MHS ONLY

7
HANDING IDENTIFICATION
For MH and MHS models with manual hoist hand chain systems,
the handing of the operator must be determined at the time of
order. The handing is indicated by last letter of the model name
(R or L). The illustration shown is a right-handed operator for
models MJ and MHS series only. Left-handed operator will have
hoist chain on the left side.
The hand chain wheel can not be switched on site. If your
installation causes the hand chain to hang in the door opening,
hook the chain off to the side near the top of the door jamb.
Output Shaft
PREPARING YOUR DOOR
The manufacturer recommends 3 feet (91.4 cm) of clearance in front of operator for serviceability. Before you begin:
• Disable locks.
• Remove any ropes connected to door.
• Before the operator is installed, be sure the door has been properly aligned and is working smoothly. Although each installation will
vary due to particular building characteristics, refer to the following general procedures to install the operator.
RIGHT-HANDED OPERATOR
MODEL SHOWN: MH5011UR
PREPARATION
RIGHT-HAND ASSEMBLY LEFT-HAND ASSEMBLY
Operator Drive
Sprocket
Drive Shaft Operator Drive
Sprocket
Drive Shaft
Install operator drive sprocket.
ASSEMBLY
1

8
DETERMINE MOUNTING LOCATION FOR OPERATOR
Optimum Distance
12"-15"
Optimum Distance
12"-15"
The operator may be mounted on the wall, shelf or bracket (not provided, see accessories or door manufacturer). The optimum
distance between the door shaft and operator drive shaft is 12-15 inches.
WALL MOUNT SHELF OR BRACKET MOUNTING
Door Shaft
Operator
Drive Shaft
Door Shaft
Operator
Drive Shaft
TYPICAL INSTALLATION
NOTE: The illustrations may not depict your installation.
INSTALL THE OPERATOR
Place door sprocket on door shaft.
Door Sprocket
Door Shaft
1Place operator door sprocket on operator.
Operator Drive
Sprocket
Drive Shaft
2
Optional Mounting Bracket.
See Accessories.

9
Wrap drive chain around operator sprocket.
Door Sprocket
Electrical Box
Operator Drive
Sprocket
Drive Chain
Wrap drive chain around door sprocket.
Door Sprocket
Drive Chain
Master Link
TYPICAL INSTALLATION
34
Door
Door Sprocket
Key
Key
Operator Drive
Sprocket
Position the operator until chain is taut
(not tight). If chain is too tight, it may
cause damage to operator.
Keep door sprocket and operator door
sprocket aligned. If sprockets are not
aligned, they may cause premature
wear on the chain.
Secure both sprockets with key and set screw. If sprockets
are not secure, they may drift and cause damage to operator.
Set Screw
Door Sprocket
5
7
6
INSTALL THE OPERATOR
Secure operator to mounting surface using appropriate
method and hardware. Mounting template can be found on
carton.
8

10
TYPICAL INSTALLATION
INSTALL EMERGENCY DISCONNECT SYSTEM
Floor
2'
4' above
floor
Wrap hand chain around hand chain wheel and through chain
guide.
Secure chain retaining bracket to wall 4 feet above the floor.
Connect the ends of the hand chain.
Hand
Chain
Hand Chain
Wheel
The MHS operator includes both a floor level disconnect sash
chain to disconnect the door from the door operator that allows
manual push up operation and an additional sash chain to engage
the manual chain hoist that also electrically disables the operator
controls.
Keyhole Bracket
Chain Retaining
Bracket
(with pad locking
provisions)
Secure keyhole bracket to wall 4 feet above the floor.
MODELS MH AND MHS ONLY MODELS MJ AND MGJ ONLY
1
1
2
3
4'

11
POWER WIRING CHART
TYPICAL INSTALLATION
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. 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.
• 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.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNINGWARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
POWER AND GROUND WIRING CONNECTIONS
NOTE: Power and control wiring must be run in separate conduit
in accordance with national and local electrical codes. Must use 14
AWG or heavier wire for power wiring. Use conduit knockouts for
wiring as indicated on the electrical box labels.
IMPORTANT NOTE: Operator must be properly grounded. Failure
to properly ground the operator could result in electric shock and
serious injury.
DISTANCE GAUGE
50 feet 14 AWG
100 feet 12 AWG
200 feet 8 AWG*
350 feet 6 AWG*
500 feet 4 AWG*
1000 feet 2 AWG*
*
Maximum wire gauge that can be connected to the operator’s
terminal is 12 AWG. When a larger wire gauge is required, the
wire must be gauged down to 12 AWG. USE COPPER WIRE ONLY.
Remove cover.
Electrical Box Cover
1Run power wires to electrical box according to national and
local electrical codes.
Conduit
Electrical Box
Sealing Nut
(Not Provided)
2
DO NOT turn power on until you have finished making ALL power
and control wiring connections.

12
^
O
OPEN
STOP
^
CLOSE
TYPICAL INSTALLATION
3-Button Control
Station
INSTALL 3-BUTTON CONTROL STATION
5'
(1.5 m)
Ground
Screws
Wall
^
O
OPEN
STOP
^
CLOSE
^
O
OPEN
STOP
^
CLOSE
Knockout
Conduit
Power
Control
Hot
Neutral
Ground
Line Power 115 Vac Single Phase
Attach power and ground wires to terminals.
3
POWER AND GROUND WIRING CONNECTIONS
To prevent possible SERIOUS INJURY or DEATH from
electrocution:
• Be sure power is NOT connected BEFORE installing door
control.
To prevent possible SERIOUS INJURY or DEATH from a closing
door:
• Install door control within sight of door, out of reach of
children at a minimum height of 5 feet (1.5 m) and away from
ALL moving parts of door.
• Install the control station far enough from the door to prevent
the user from coming in contact with the door while operating
the controls.
• Install the entrapment warning placard on wall next to the
control station in a prominent location that is visible from the
door.
• NEVER permit children to operate or play with door control
push buttons or remote controls.
• Activate door ONLY when it can be seen clearly, is properly
adjusted and there are no obstructions to door travel.
• ALWAYS keep door in sight until completely closed. NEVER
permit anyone to cross path of closing door.
Remove the control station cover.
Fasten the control station to the wall at least 5 feet above the
ground. The installation surface must be smooth and flat.
1Select appropriate knockout and run the wires to the operator.
2
3
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNINGWARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA

13
Power
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
2345 67
STOP CLOSE OPEN
R27
^
OPEN
^
CLOSE
O
STOP
AUX ANT
^^^^
AUX ANT
AUXANT
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
234567
STOP CLOSE OPEN
Logic Board
Remove factory
jumper if
external
interlock is
used.
3-Button Control
Station
Open
Close
Stop
Control
Common
Locate the wire antenna on the outside of the electrical
box. Cut the wire tie closest to the edge of the
electrical box.
Press the plastic standoff into the hole in the side of
the electrical box.
SETUP RADIO ANTENNA
OPTION A
Wire Ties
Antenna
Standoff
Antenna
Cut Wire Tie
1
Cut this Wire Tie
2
TYPICAL INSTALLATION
INSTALL 3-BUTTON CONTROL STATION
Fasten the entrapment warning placard next to the control
station.
Connect wires to the control station and replace the control
station cover.
45
UL
Entrapment
Placard
Warning Placard

14
OPTION B
Locate the wire antenna on the outside of the electrical box.
Cut wire ties and discard standoff.
Attach the antenna to the electrical box using the wire tie
holes. Bend antenna across the front of the electrical box,
ensuring that the antenna is 4 inches away from the front of
the electrical box.
Cut these Wire Ties
Wire Ties
Cut Wire Ties
Antenna
NOTICE: To comply with FCC and or Industry Canada (IC) rules, adjustment or modifications of this receiver and/or transmitter are prohibited, except for changing the code setting or replacing the battery.
THERE ARE NO OTHER USER SERVICEABLE PARTS.
Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
1
TYPICAL INSTALLATION
2
SETUP RADIO ANTENNA
To reduce the risk of SEVERE INJURY or DEATH:
IMPORTANT SAFETY INSTRUCTIONS
1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS.
2. ALWAYS keep remote controls out of reach of children.
NEVER permit children to operate or play with door control
push buttons or remote controls.
3. ONLY activate door when it can be seen clearly, it is properly
adjusted and there are no obstructions to door travel.
4. ALWAYS keep door in sight until completely closed. NO ONE
SHOULD CROSS THE PATH OF THE MOVING DOOR.
5. NO ONE SHODULD GO UNDER A STOPPED, PARTIALLY
OPENED DOOR.
6. If possible, use manual release handle to disengage door
ONLY when door is CLOSED. Weak or broken springs or
unbalanced door could result in an open door falling rapidly
and/or unexpectedly.
7. NEVER use manual release handle unless doorway is clear of
persons and obstructions.
8. After ANY adjustments are made, the entrapment protection
device MUST be tested.
9. Entrapment Protection device MUST be tested every month.
10. ALWAYS KEEP DOOR PROPERLY BALANCED. An
improperly balanced door may NOT reverse when required
and could result in SEVERE INJURY or DEATH.
11. ALL repairs to cables, spring assemblies and other
hardware, ALL of which are under EXTREME tension, MUST
be made by a trained door systems technician.
12. ALWAYS disconnect electric power to door operator BEFORE
making ANY repairs or removing covers.
13. SAVE THESE INSTRUCTIONS.
WARNING
WARNING
WARNINGWARNING

15
A B
Clutch Nut
To Loosen
To Tighten
Apply power to operator.
Turn clutch nut to release tension.
Re-tighten nut until there is just enough tension to permit
smooth operation.
Replace cotter pin. Bend ends of cotter pin to secure
clutch nut.
ADJUST THE LIMITS
Depress retaining plate. Adjust OPEN limit. Adjust CLOSE limit.
Retaining Plate
Decrease
Door Travel
Increase
Door Travel
OPEN Limit Switch
OPEN Limit Nut
CLOSE Limit Switch
CLOSE Limit Nut
SAFETY Limit Switch
Decrease
Door Travel
Increase
Door Travel
NOTE: When retaining plate is released, verify that the retaining plate is fully seated with the notches of the limit nut.
ADJUSTMENT
123
FOR MODELS MJ, MH, AND MHS ONLY
1
2
3
4
ADJUST THE CLUTCH
To avoid SERIOUS personal INJURY or DEATH from
electrocution:
• Disconnect electric power BEFORE performing ANY
adjustments or maintenance.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNINGWARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA

16
To prevent possible SERIOUS INJURY or DEATH from a closing
door:
• Be sure power is NOT connected to the door operator
BEFORE installing the photoelectric sensor.
• The door MUST be in the fully opened or closed position
BEFORE installing the LiftMaster Monitored Entrapment
Protection device.
To prevent SERIOUS INJURY, DEATH, ENTRAPMENT, or
PROPERTY DAMAGE:
• Correctly connect and align the photoelectric sensor.
• Install the photoelectric sensor beam NO HIGHER than
6" (15 cm) above the floor.
• This is a required safety device for B2, TS, T, and FSTS wiring
types and MUST NOT be disabled. For D1, C2, and E2 wiring
the installation of an entrapment device is recommended.
• LiftMaster Monitored Entrapment Protection devices are for
use with LiftMaster Commercial Door Operators ONLY. Use
with ANY other product voids the warranty.
• If an edge sensor is being used on a horizontal slide door,
then place one or more edge sensors on both the leading and
trailing edge.
• If an edge sensor is being used on a vertically moving door,
then place one or more edge sensors on the bottom edge of
the door.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIAADVERTENCIA
LIFTMASTER MONITORED ENTRAPMENT
PROTECTION (LMEP)
Safety Reversing
Sensor
Invisible Light Beam
Protection Area
Safety Reversing
Sensor
— Right Side of Garage
—
—Left Side of Garage—
Photoelectric
Sensor 6" (15 cm)
max. above floor
Photoelectric
Sensor 6" (15 cm)
max. above floor
Invisible Light Beam
Protection Area
ENTRAPMENT PROTECTION
IMPORTANT INFORMATION ABOUT THE LIFTMASTER
MONITORED ENTRAPMENT PROTECTION DEVICES
A LiftMaster Monitored Entrapment Protection (LMEP) device is
required for most wiring types. If a LiftMaster Monitored
Entrapment Protection device is not installed, constant pressure to
close will be required from the control station.
When properly connected and aligned, the photoelectric sensors
will detect an obstruction in the path of its invisible light beam. If
an obstruction breaks the light beam while the door is closing, the
door will stop and typically reverse to the full open position.
The photoelectric sensors must be installed facing each other
across the door, no more than 6" (15 cm) above the floor.
Each photoelectric sensor has an LED that will glow steady when
the sensor is properly connected and aligned. The LEDs on both
photoelectric sensors will flicker rapidly when obstructed or
misaligned.

17
Mounting Bracket
with Square Holes
“C” Wrap
#10-32x3/8"
Screws
#10-32
Lock Nuts
ENTRAPMENT PROTECTION
WALL INSTALLATION
2
3
4
5
Connect each assembly to a slotted bracket, using the
hardware shown. Note alignment of brackets for left and
right sides of the door.
Finger tighten the lock nuts.
Use bracket mounting holes as a template to locate and drill
(2) 3/16" diameter pilot holes on both sides of the garage
door, 4-6 inches (10-15 cm) above the floor. Do not exceed
6 inches (15 cm).
Attach bracket assemblies with 1/4"x1-1/2" lag screws.
Adjust right and left side bracket assemblies to the same
distance out from mounting surface. Make sure all door
hardware obstructions are cleared. Tighten the nuts securely.
6
ALTERNATE WALL INSTALLATION ALTERNATE FLOOR INSTALLATION
2Discard slotted bracket. Drill 3/8" holes in each track and
fasten securely with hardware.
DOOR TRACK INSTALLATION
1/4"x1-1/2"
Lag Screws 1/4"-20x1/2" Carriage Bolts
(with square shoulders)
1/4"-20
Lock Nuts
Inside
Wall
Mounting Bracket
with Slot Mounting Bracket with
Square Holes
“C” Wrap
Mounting Bracket with Slot
Mounting Bracket with Square Holes
“C” Wrap
Sensor with Wire
Indicator Light
- Floor -
Inside
Wall
Inside
Wall
“C” Wrap
Mounting Bracket with
Square Holes
1/4" Lock Nuts
Door Track
Drill 3/8" Holes
1/4"-20x1/2"
Carriage Bolts
Sensor with Wire
Inside
Wall
Indicator Light
Mounting Bracket with
Square Holes
Mounting Bracket with Slot
“C” Wrap
- Floor -
Attach with Concrete Anchors
(Not Provided)
INSTALL THE PHOTOELECTRIC SENSORS
The following instructions show recommended assembly of the bracket(s) and “C” wrap based on the wall installation of the
photoelectric sensors on each side of the door or on the door tracks themselves. There are also alternate mounting methods which may
fit your installation requirements better.
Make sure the wraps and brackets are aligned so the photoelectric sensors will face each other across the door.
Fasten the “C” wraps to the mounting brackets having square
holes, using hardware shown.
1

18
^^^^
XANT
ANT
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
234567
STOP CLOSE OPEN
PRIMARY INSTALLATION: CPS-U PHOTOELECTRIC SENSORS
(White)
(White/Black)
NOTE: When installing model CPS-UN4, connect the brown wire to
terminal 1 and the blue wire to terminal 2.
ENTRAPMENT PROTECTION WIRING OPTIONS
ENTRAPMENT PROTECTION
MOUNT THE PHOTOELECTRIC SENSORS
Center each sensor in the bracket with the lenses pointing
toward each other across the door.
Attach the sensors to the brackets with the provided
hardware. Finger tighten the receiving sensor wing nut.
Securely tighten the sending sensor wing nut.
Run the wires from both sensors to the operator. Use
insulated staples to secure wire to the wall and ceiling.
Connect the sensor wires to the operator.
1
2
3
4
Wire
Indicator Light
“C” Wrap
Wing Nut
1/4"-20x1-1/2" Hex Bolt
Sensor
Photoelectric Sensor
6" (15 cm) max. above floor
Invisible Light Beam Protection Area
Bell Wire
Secure wire with
insulated staples
Connect wire
to Operator
Photoelectric Sensor
6" (15 cm) max. above floor

19
AUX ANT
^^^^
AUX ANT
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
2 345 67
STOP CLOSE OPEN
LOGIC BOARD LAYOUT
5
10
9
8
7
6
4
3
2
1
ITEM DESCRIPTION FUNCTION
1 Open Button Open Door
2 Close Button Close Door
3 Stop Button Stop Door
4 Learn Button Programs the remote controls
and performs additional
programming
5 Timer-to-Close Button Programs the Timer-to-Close
6 Purple Wire Antenna Primary Antenna
7 Auxiliary Antenna Connection For use with external antenna
kit -EXT-ANT. Not Provided
8 LED Used during programming
and diagnosing error codes
9 Field Wiring Terminal Field wiring connections
10 Factory Wiring Connector Factory wiring harness
connection
ENTRAPMENT PROTECTION WIRING OPTIONS
ENTRAPMENT PROTECTION
^^^^
AUX ANT
AUX ANT
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
234567
STOP CLOSE OPEN
^^^^
AUX ANT
AUX ANT
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
2 345 67
STOP CLOSE OPEN
^^^^
AUX ANT
AUX ANT
D14
COM INTRLK STOP
LED
OPENCLOSE
TTC LEARN
1
LMEP1 LMEP2
2 345 67
STOP CLOSE OPEN
4-wire electric sensing edge
CPS-U PHOTOELECTRIC SENSOR WITH 2-WIRE SENSING EDGE
CPS-U PHOTOELECTRIC SENSOR WITH 4-WIRE SENSING EDGE
2-WIRE ELECTRIC OR PNEUMATIC SENSING EDGE (B2 NOT AVAILABLE)
2-wire electric or pneumatic sensing edge
2-wire electric or pneumatic sensing edge
(White/Black)
(White)
(White)
(White/Black)
(White)
(White/Black)
ALTERNATE INSTALLATIONS:

20
DETERMINE THE WIRING TYPE
The functionality of this operator is based on the wiring type. The operator is shipped from the factory in standard C2 wiring type
(factory default). LIFTMASTER MONITORED ENTRAPMENT PROTECTION (LMEP) DEVICE IS RECOMMENDED.
A LiftMaster Entrapment Protection (LMEP) device is required for any momentary contact to close mode of operation including B2,
TTC and remote controls.
NOTES:
• The LED on the logic board will blink once when in C2 and twice when in B2.
• The operator will automatically convert to B2 wiring when Monitored Entrapment Protection Device is installed. If the Monitored
Entrapment Protection Device is blocked or removed, the operator will go into a Restricted Close mode**.
** Restricted close mode requires a constant pressure close command. The operator will begin closing after a 5 second delay and
will continue to close to the close limit switch. The operator will stop if the pressure to close is released before reaching the close
limit.
RECOMMENDED INSTALLATION: B2 WIRING TYPE WITH
MONITORED ENTRAPMENT PROTECTION DEVICE
• Momentary contact to open, close and stop.
• Open override that reverses when closing by any opening
device.
• Wiring for entrapment protection device to reverse.
NOTE: The operator will automatically convert to B2 wiring
when Monitored Entrapment Protection Device is installed.
(See accessories page for Monitored Entrapment Protection
Devices.)
• Timer-to-Close (TTC) feature available.
Photoelectric Sensor
MONITORED ENTRAPMENT PROTECTION DEVICE
BASIC PROGRAMMING
No Programming Required