MODEL MT FACTORYSET

C2 Wiring
FACTORYSET
See page 11 for
MEDIUM DUTY DOOR OPERATOR C2 Wiring
other wiring
configurations
OWNER’S MANUAL See page 11 for
other wiring
configurations
OWNER’S MANUAL
MODEL MT
M ODUTY
MEDIUM D EDOOR
L M T
OPERATOR
MEDIUM DUTY DOOR OPERATOR

R PROFESSIONAL INSTALLATION ONLY

to locate a professional installing dealer in your area.

WARRANTY

over)
NOT FOR RESIDENTIAL USE
INTENDED FOR PROFESSIONAL INSTALLATION ONLY
Visit www.LiftMaster.com to locate a professional installing dealer in your area.
INTENDED FOR PROFESSIONAL INSTALLATION ONLY
AVisit 2 DEVICE
Y E A R ISW
www.LiftMaster.com
SAFETY toAlocate
HIGHLYR R ARECOMMENDED
aN TY
professional installing dealer in your area.

Serial # 2 Y E A R W A R R A N T Y
(located on electrical box cover)
Serial # NOT FOR RESIDENTIAL USE
Installation
(located Date
on electrical box cover)

Wiring TypeDate NOT FOR RESIDENTIAL USE

Installation

Wiring Type A SAFETY DEVICE IS HIGHLY RECOMMENDED

A SAFETY DEVICE IS HIGHLY RECOMMENDED

For more information, please visit www.devancocanada.com or call toll free at 855-931-3334
 TABLE OF CONTENTS
SPECIFICATIONS CONTROL STATION WIRING
Operator Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Determine Wiring Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Operator Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Special Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Mount Warning Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
PREPARATION Radio Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Track Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Additional Access Control Equipment . . . . . . . . . . . . . . . . . . . . .12
Powerhead Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 External Interlock Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Trolley Carriage/Chain Attachment . . . . . . . . . . . . . . . . . . . . . . . .4
TESTING AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . .13
INSTALLATION
Mount the Header Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 DIAGRAMS
Mount the Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Schematic Diagram for MT5011 . . . . . . . . . . . . . . . . . . . . . . . . .14
Hang the Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Wiring Diagram for MT5011 . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Straight Arm Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Schematic Diagram for BMT5011 . . . . . . . . . . . . . . . . . . . . . . .16
Entrapment Protection Accessories . . . . . . . . . . . . . . . . . . . . . . .7 Wiring Diagram for BMT5011 . . . . . . . . . . . . . . . . . . . . . . . . . .17

ADJUSTMENT REPAIR PARTS

Limit Switch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-19
Emergency Disconnect System . . . . . . . . . . . . . . . . . . . . . . . . . .8 Repair Parts Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-21
Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Clutch Adjustment and Auxiliary Reversal System . . . . . . . . . . . .9 OPERATOR NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-23
POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 CONTROL CONNECTION DIAGRAM . . . . . . . . . . . . . . . .24

WARNING WARNING
Mechanical IMPORTANT NOTES:
• BEFORE attempting to install, operate or maintain the operator,
CAUTION
WARNING
WARNING WARNING
WARNING
you must read and fully understand this manual and follow all
safety instructions.
Electrical
• DO NOT attempt installation, repair or service of your
WARNING
CAUTION commercial door and gate operator unless you are an WARNING
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
AVERTISSEMENT
statements that accompany it. Read them carefully. AVERTISSEMENT

ATTENTION
AVERTISSEMENT
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT

AVERTISSEMENT
ATTENTION AVERTISSEMENT

2
 O P E R AT O R S P E C I F I C AT I O N S
MOTOR ELECTRICAL
TYPE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Intermittent duty TRANSFORMER: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Vac
HORSEPOWER: . . . . . . . . . . . . . . . . . . . . . . . . .1/2 Horsepower CONTROL STATION: . . . . . . . . . . .NEMA 1 three button station.
SPEED: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1000 RPM OPEN/CLOSE/STOP
VOLTAGE: . . . . . . . . .115V, 1 Phase, 60Hz 230V, 1 Phase, 50Hz WIRING TYPE: . . . . . . . . . . . . . . . . . . . . .C2 (Factory Shipped)
CURRENT: . . . . . . . . . . . . . . . . . . . . . . . . .See motor nameplate Momentary contact to OPEN & STOP, constant pressure to
CLOSE, plus wiring for sensing device to reverse. See page 11
for control wiring options.
LIMIT ADJUST: . . . . . . . . . . . . . .Linear driven, fully adjustable
screw type cams.

MECHANICAL SAFETY
DRIVE REDUCTION: . . . . . . . .Primary: Heavy duty (4L) V-Belt. DISCONNECT: .............................Quick disconnect door arm for
Secondary: #48 chain/sprocket. Output: #48 chain emergency manual door
OUTPUT SHAFT SPEED: . . . . . . . . . . . . . . . . . . . . . .108 R.P.M. operation.
DOOR SPEED: . . . . . . . . .Approximately 9" (22.86 cm) per sec. SENSING DEVICE: ......................Accepts photo electric controls
depending on door such as CPS, or an electric / pneumatic sensing edge can be
BRAKE (Optional): . . . . . . . . . . . .Solenoid actuated disc brake attached to the bottom edge of door.
BEARINGS: . . . . . . . .IronCopper sintered and oil impregnated. A sensing device 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.

O P E R AT O R D I M E N S I O N S
WEIGHTS AND DIMENSIONS
HANGING WEIGHT:80-110 LBS. (36.29-49.9 kg)

12-1/2"
(31.75 cm)

Door Height Plus 4 feet (1.22 m) (minimum)

4"
(10.16 cm)
9-1/2"
(24.13 cm)
Highest Point of Door Travel

16-3/16"
(41.12 cm)

3
 WARNING P R E PA R AT I O N WARNING
TRACK ASSEMBLY
CAUTION
1. Using the 3/8"-16 x 3/4" bolts and flange hex nuts provided, WARNING
assemble the operator track by installing and tightening the To prevent possible SERIOUS INJURY or DEATH:
track spacer brackets. Position the spacers evenly over the • DO NOT connect electric power until instructed to do so.
length of the track. NOTE: The nylon pad on the spacer
• If the door lock needs to remain functional, install an
bracket should face up.
interlock switch.
2. Using (2) 3/8"-16 x 1" bolts and lock washers, install the front
• ALWAYS call a trained professional door serviceman if door
idler assembly to the second set of holes of one end of the binds, sticks or is out of balance. An unbalanced door may
track. Refer to the illustration below. not reverse when required.
3. Slide the trolley carriage onto the track so that the take-up bolt • NEVER try to loosen, move or adjust doors, door springs,
will be toward the operator. cables, pulleys, brackets or their hardware, ALL of which are
under extreme tension and can cause SERIOUS personal
POWERHEAD ATTACHMENT INJURY.
1. Position the track assembly on the frame of the powerhead so • Disable ALL locks and remove ALL ropes connected to door
AVERTISSEMENT
that the motor side of operator is in back (away from door). AVERTISSEMENT
BEFORE installing and operating door operator to avoid
2. Loosely install two 3/8"-16 x 3/4" bolts and nuts in third hole entanglement.
from the end of the track.
ATTENTION
3. Align the track so that the bolts inserted in step 2 line up with
the L-Slots in the frame.
AVERTISSEMENT
TROLLEY CARRIAGE / CHAIN ATTACHMENT
1. Attach the take-up bolt to the trolley carriage using
4. Connect the track to the powerhead by fastening two 3/8-16" hex nuts and lock washer, as shown below.
3/8"-16 x 3/4" bolts and nuts through the frame and the end
2. Using one of the master links, attach the chain to the other
holes in track. Tighten all four bolts to secure the track to the
end of the trolley carriage. Reel the chain around the front idler
powerhead.
shaft, over the spacer brackets, back to the drive shaft
sprocket, and then to the take-up bolt on the carriage.
3. Using the other master link, attach the chain to the take-up
bolt and tighten to the desired chain tension.
Chain Tension: With trolley positioned at either end of the track, a
properly adjusted chain will sag about 3" (7.62 cm) at the
mid-point. If necessary, remove links from the chain to achieve
proper adjustment.

Front Idler Assembly

ADVERTENCIA ADVERTENCIA

PRECAUCIÓN ADVERTENCIA Reel Chain

Around Idler and
Trolley Carriage Over Spacer Brackets

Spacer Bracket
(Mounted Nylon Pad Side Up) Trolley Assembly

Take-Up Bolt
L-Slot Master Link

Trolley Carriage

Hex Nut Take-Up Bolt

Lockwasher
Hex Nut

Master Link
Roller Chain

Straight Arm

4
 I N S TA L L AT I O N
IMPORTANT NOTE: 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.

MOUNT HEADER BRACKET MOUNT OPERATOR

The trolley operator is generally mounted over the center of the 1. Allowing the motor to rest on the floor, raise the front end of
door. However, off center mounting may be required due to the track assembly to the front header bracket and fasten
interfering structures or location of door stile / top section using the 3/8" dia. x 6.40" long pivot shaft and cotterpins
support. In such cases, the operator may be mounted up to 24" provided.
(60.96 cm) off center on torsion spring doors. Extension springs
require center mounting.
Header Bracket

1. Locate the center of the door and mark a line on the wall
directly above the door. Extend this line up the wall.
2. Determine the highest point of door travel. Slowly raise the
door and observe the action of the top section. When the top
section reaches its highest point, use a level and project a line
from this point to the center line the of the door. Cotterpins

Carpenter’s Header Wall

Level

High Point Pivot Shaft

of Travel

2. Swing the operator to a horizontal position above the guide

rails and temporarily secure with a suitable rope, chain, or
Door Travel support from the floor. Now open garage door slowly, being
Projection
careful not to dislodge the temporary support. Using the door
as a support, place a level against the rail and shim the
operator until it is horizontal. Make sure that the operator is
aligned with the center line of the door.

3. Using the projected lines for location, mount a suitable wood

block or length of angle iron to the wall above the door
opening. Refer to the illustration below. This will provide a
mounting pad for the front header bracket of the operator. If
necessary reinforce the wall with suitable mounting brackets Guide
Rails
to ensure adequate support of mounting pad. Using suitable
hardware, mount the (U-shaped) front header bracket to the
pad.
Using the door as support, shim
operator to a horizontal position.

3.5"
(8.89 cm)
1.75"
(4.45 cm)

High Rise Point

Projection Line

4" (10.16 cm)

Min.

Vertical Center Line of Door

Header Bracket Drill Pattern Operator Alignment

5
 I N S TA L L AT I O N
HANG THE OPERATOR
1. The illustration below shows a typical method of hanging the WARNING
operator from the ceiling. Each installation may vary, but in all To avoid possible SERIOUS INJURY from a falling operator,
cases side braces should be used for additional strength. fasten it SECURELY to structural supports of the garage.
2. For mounting of the support brace(s) to the powerhead. Four CAUTION
Concrete anchors MUST be used if installing ANY brackets
holes (clearance up to 3/8" bolts) are located on each side of into masonry.
frame.
3. Check to make sure the track is centered over the door (or in
line with the header bracket if the bracket is not centered above STRAIGHT ARM ATTACHMENT
the door). 1. Fully close the door and move the trolley slider to within 2"
NOTE: If the operator is longer than 15' (4.57 m) use of a (5.08 cm) of the front idler.
mid-span support is recommended. 2. Latch the straight door arm to the fixed roll pin in the trolley
carriage. Make sure the open side of notch on the arm faces
the doorway.
3. Attach the door bracket to the door arm using the 3/8"-16 x 1"
bolt and nylon locking nut provided. Leave the nut and bolt
loose enough to allow the two pieces to pivot freely.
AVERTISSEMENT
4. Using 3/8" hardware provided, bolt the curved door arm to the
straight arm, aligning the mounting holes in such a way that
the door bracket pivot bolt will be in line with the top rollers on
the door.
ATTENTION
5. Position the door bracket to the center line on the door. Using
suitable hardware, attach the door bracket to the door. Many
installations, except solid wood doors, will require additional
support for the door. Refer to the illustration below.
NOTE: At this time, ensure all bolts and lag screws are properly
secured.

Top
Roller

Mid-Span
Support Brace Straight Arm

Center Line of Door

Door Bracket
Curved
Powerhead Support Brace ADVERTENCIA
Door Arm

Pivot Bolt
PRECAUCIÓN

6
 I N S TA L L AT I O N

ENTRAPMENT PROTECTION ACCESSORIES

(OPTIONAL) WARNING
SENSING EDGES To reduce the risk of SEVERE INJURY or DEATH, ALWAYS
install reversing sensors when the 3-button control station is
All types of sensing edges with an isolated normally open (N.O.) CAUTION
out of sight of door or ANY other control (automatic or manual)
output are compatible with your operator. This includes is used. Reversing devices are recommended for ALL
pneumatic and electric edges. If your door does not have a installations.
bottom sensing edge and you wish to purchase one, contact the
supplier of your operator.

If not pre-installed by the door manufacturer, mount the sensing

edge on the door according to the instructions provided with the
edge. The sensing edge may be electrically connected by either
coiled cord or take-up reel. Refer to the steps below.
Important Notes: TAKE-UP REEL: Take-up reel should be installed 12" (30.48 cm)
a) Proceed with Limit Switch Adjustments before making any above the top of the door.
sensing edge wiring connections to operator as described
below. COIL CORD: Connect operator end of coil cord to junction box
b) Electrician must hardwire the junction box to the operator
AVERTISSEMENT
(not provided) fastened to the wall approximately halfway up the
electrical box in accordance with local codes. door opening.

ATTENTION
WARNING ADJUSTMENT WARNING
LIMIT SWITCH ADJUSTMENT
CAUTION
NOTE: Make sure the limit nuts are positioned between the limit
WARNING
switches before proceeding with adjustments. To avoid SERIOUS PERSONAL INJURY or DEATH from
1. Depress retaining plate to allow nut to spin freely. After electrocution, disconnect electric power BEFORE manually
adjustment, release plate and move nut back and forth to moving limit nuts.
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.

AVERTISSEMENT ADVERTENCIA
AVERTISSEMENT
Sensor for Auxiliary Reversing System
OPEN Limit Switch

ATTENTION PRECAUCIÓN
AVERTISSEMENT
Retaining Plate
CLOSE Limit Switch

AUX. OPEN
Limit Switch

SAFETY
(Aux. Close) Limit Switch

7
 ADJUSTMENT
EMERGENCY DISCONNECT SYSTEM
WARNING
TO DISCONNECT DOOR FROM OPERATOR
To prevent possible SERIOUS INJURY or DEATH from a falling
The door should be in the fully closed position if possible. Pull door or arm:
down on the emergency release handle (so that the trololey CAUTION
• DO NOT stand under the door arm when pulling the
release arm snaps into a vertical position) and lift the door
emergency release.
manually. The lockout feature prevents tthe troley from
reconnecting automatically, andd the door can be raised and • If possible, use emergency release handle to disengage trolley
loweredd manually as often as necessary. ONLY when door is CLOSED. Weak or broken springs or
unbalanced door could result in an open door falling rapidly
and/or unexpectedly.
• NEVER use emergency release handle unless doorway is clear
of persons and obstructions.
Emergency
Disconnect

Pull emergency release Header Trolley

handle straight down. Bracket
Door Arm
Emergency disconnect Track
will open.

AVERTISSEMENT
TO RECONNECT DOOR ARM TO TROLLEY Clevis Pin
Pull the emergency release handle toward the operator at an
angle so that the trolley release arm is horizontal. The trolley will
Emergency
Disconnect
ATTENTION Chain

reconnect on the next UP or DOWN operation, either manually or Straight

by using the door control or remote. Door Arm
Assembly

Emergency Door
Disconnect Bracket
Lift free end of door arm
to trolley. Pull emergency
handle to allow arm to
Door Arm engage roll pin. Release
handle. Emergency
disconnect will close.

Curved NOT
ICE
Door Arm Emergency
Door
Release Handle

ADVERTENCIA

PRECAUCIÓN

8
 ADJUSTMENT
BRAKE ADJUSTMENT
A solenoid brake is an optional modification. If provided, the
brake is adjusted at the factory and should not need additional Solenoid
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. Release Lever

Friction Pads

Pulley

CLUTCH ADJUSTMENT AND

AUXILIARY REVERSAL SYSTEM WARNING
The Auxiliary Reversal System is designed to protect the door To prevent possible SERIOUS INJURY or DEATH, install
reversing sensors when the 3-button control station is out of
and motorized operator. It is NOT a substitute for a safety sensing
device. The Auxiliary Reversal System works in tandem with the
CAUTION
sight of the door or ANY other control (automatic or manual) is
used. Reversing devices are recommended for ALL
adjustable clutch to detect if a closing door runs into or comes
installations.
across an obstruction. If an obstruction is met and causes the
clutch to slip, the Auxiliary Reversal System will return the door
to the full open position when closing or stops the door when
opening.
Adjusting Nut Clutch Pad

1. Remove cotterpin from nut on the clutch shaft. Spring

2. Back off clutch nut until there is very little tension on the Clutch Plate
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 Cotterpin
AVERTISSEMENT
Washer
door by hand during travel.
4. Reinstall cotterpin.
Clutch Pulley
ATTENTION

ADVERTENCIA
9

PRECAUCIÓN
NG P O WWARNING
ER WIRING

N WARNING
To reduce the risk of SEVERE INJURY or DEATH: • ALL electrical connections MUST be made by a qualified
• ANY maintenance to the operator or in the area near the individual.
operator MUST NOT be performed until disconnecting the • Do not install ANY wiring or attempt to run the operator
electrical power and locking-out the power via the operator without consulting the wiring diagram. We recommend that
power switch. Upon completion of maintenance the area MUST you install an optional reversing edge BEFORE proceeding with
be cleared and secured, at that time the unit may be returned the control station installation.
to service. • ALL power wiring should be on a dedicated circuit and well
• Disconnect power at the fuse box BEFORE proceeding. protected. The location of the power disconnect should be
Operator MUST be properly grounded and connected in visible and clearly labeled.
accordance with local electrical codes. The operator should be • ALL power and control wiring MUST be run in separate
on a separate fused line of adequate capacity. conduit.

EMENT
POWER WIRING CONNECTIONS AVERTISSEMENT
Remove the cover from the electrical enclosure. Inside this
enclosure you will find the wiring diagram(s) for your unit. Refer
ON AVERTISSEMENT
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.

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 hole 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.

NCIA ADVERTENCIA

ÓN ADVERTENCIA

Two 7/8" and 1-1/16" Knockouts

(1 each side) for Control and Power Wiring

10
 C O N T R O L S TAT I O N W I R I N G
DETERMINE WIRING TYPE
Refer to the wiring diagram located on the inside cover the WARNING
electrical box to determine the type of control wiring. To prevent possible SERIOUS INJURY or DEATH, install
reversing sensors when the 3-button control station is out of
Standard C2 or B2 Wiring
CAUTION
sight of the door or ANY other control (automatic or manual) is
used. Reversing devices are recommended for ALL
Standard operators are shipped from the factory with jumper set installations.
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.

Constant pressure on close (C2 wiring)

In the electrical enclosure, a RED wire was placed on terminal
block #12. With this setting, 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) AVERTISSEMENT

Move RED wire from terminal block #12 to terminal #2. The
operator will require only momentary contact to close the door.
ATTENTION
SPECIAL CONTROL WIRING SPECIAL CONTROL
If your operator was shipped from the factory with WIRING DIAGRAM WI
non-standard control wiring or with optional accessories that
require addition instructions, refer to the wiring diagram(s) This Operator has
indicated in the special control wiring data box. When a Control Wiring.
replacement wiring diagram is present, wiring diagrams in this SUPPLEMENTAL WIRING DIAGRAM(S)
manual will not apply. Refer only to the replacement wiring
Wiring Type
diagram for all connections.

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

Wiring Diagram label on inside cover of electrical box

ADVERTENCIA

MOUNT WARNING NOTICE PRECAUCIÓN Standard

LOCATING THE CONTROL STATION Control Station

All operators are provided with some type of control station.

Generally a three button station (OPEN/CLOSE/STOP) is provided. OPEN

A two-position key switch or control station (OPEN/CLOSE) may WARNING

be added or substituted when requested at the time of order. Push CLOSE
TO PREVENT ENTRAPMENT
Buttons
Mount the control station near the door. DO NOT START DOOR DOWNWARD
UNLESS DOORWAY IS CLEAR
STOP
IMPORTANT: Mount WARNING NOTICE beside or below the push
button station.Mount control station(s) within line of sight of WARNING Notice
door(s).

11
 C O N T R O L S TAT I O N W I R I N G
RADIO CONTROLS
On all models with type B2 control wiring, a terminal bracket WARNING
marked R1 R2 R3 is located on the outside of the electrical To prevent possible SERIOUS INJURY or DEATH, install
enclosure. All standard radio control receivers (single channel reversing sensors when the 3-button control station is out of
residential type) may be mounted to this bracket. The operator CAUTION
sight of the door or ANY other control (automatic or manual) is
will then open a fully closed door, close a fully open door, and used. Reversing devices are recommended for ALL
reverse a closing door from the radio transmitter. However, for installations.
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 AVERTISSEMENT
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.
ATTENTION

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.

ADVERTENCIA

PRECAUCIÓN

12
 WARNING T E S T I N G A N D M A I N T E N A N WARNING
CE
Turn on power. Test all controls and safety devices to make sure
CAUTION
they are working properly. It will be necessary to refer back to WARNING
page 7 for fine adjustment of the limit switches.
To avoid SERIOUS PERSONAL INJURY or DEATH from
electrocution, disconnect ALL electric power BEFORE
IMPORTANT NOTES: performing ANY maintenance.
• 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
AVERTISSEMENT
door operating system. AVERTISSEMENT

ATTENTION AVERTISSEMENT
MAINTENANCE SCHEDULE
Check at the intervals listed in the following chart:

ITEM PROCEDURE EVERY 3 MONTHS EVERY 6 MONTHS EVERY 12 MONTHS

Drive Chain Check for excessive slack.
Check and adjust as required.
Lubricate.  
Sprockets Check set screw tightness.  
Clutch Check and adjust as required.  
Belt Check condition and tension.  
Fasteners Check and tighten as required.  
Manual Disconnect Check and operate.  
Bearings and Shafts Check for wear and lubricate.  
ADVERTENCIA WARNING ADVERTENCIA
HOW TO ORDER REPAIR PARTS
WARNING
PRECAUCIÓN ADVERTENCIA
OUR LARGE SERVICE ORGANIZATION SPANS AMERICA
To avoid SERIOUS PERSONAL INJURY or DEATH from
electrocution, disconnect ALL electric power BEFORE Installation and service information are available.
performing ANY maintenance. Call our TOLL FREE number:
1-800-528-2806
 Use SAE 30 Oil (Never use grease or silicone spray). www.liftmaster.com
• Do not lubricate motor. Motor bearings are rated for
continuous operation.
• Do not lubricate clutch or V-belt.
 Repeat ALL procedures.
 Inspect and service whenever a malfunction is observed or
suspected.
AVERTISSEMENT

AVERTISSEMENT
13
 S C H E M AT I C D I A G R A M F O R M T 5 0 1 1 • 1 7 5 3
(OPTIONAL)
(OPTIONAL)
BIMETAL
LIGHT
RELAY
W

C B
MAX.
100W

BK
A W
WIRE NUT
CLOSE-B
BL Y
C N.O.

W
RES. MOTOR *
Y
BK
L2
BK
OPEN-A O/L
L1
Y
R
CAPACITOR BR

R
WIRE NUT
BK

W
PR1.
3 STOP 4 Y 10VA. Y/BK
R3
24VAC.
MOVE JUMPER WIRE TO TERMINAL #2 SEC.
FOR MOMENTARY CONTACT R
ON CLOSE
CLOSE-A
BL 12 BL R
BR BR C N.O.
R1 OPEN-B

OPEN OR OPEN L.S.

1 OR OR W 11
OP
N.C. C
SAFETY AUX.
EDGE CLOSE L/S
10
OR
GY GY
GY
RPM SENSOR BOARD
W
5 4 3 2 1
Y
PULL SWITCH
TO
OPEN & CLOSE AUX. W
Y Y OPEN
R2
7
L/S
R
P
CLOSE CLOSE L/S
P P W
CL
2 N.C. C

* TO REVERSE MOTOR ROTATION, INTERCHANGE RED AND YELLOW MOTOR WIRES.

14
 WIRING DIAGRAM FOR MT5011 • 1753

TO REVERSE MOTOR DIRECTION,

INTERCHANGE RED & YELLOW WIRES.

CLOSE P OR OPEN
C N.C. N.C. C

W W

C N.C.
AUX.CLOSE
GY GY
N.C.
OR C
P AUX.OPEN
N.O.
Y

Y
R3
RADIO
RESISTOR Y R2
REC’R
BR R1
Y WIRE NUT
Y
O/L
MOTOR
CAPACITOR P OR
BR
R
BK WIRE NUT

W
Y
R
B A B A
Y/BK W BL NC NC
OR NO W NO
BR C C
S P
E R XFMR OP CL
C. I.
BL R
BK
P

RPM
SENSOR R OR
5 OR P BR Y Y GY W BL BK BK
4
3
1 2 3 4 7 10 11 12 L1 L2
2 GROUND
See Close Control
1
Wiring Options Below
OPEN 120VAC

CLOSE PULL SWITCH TO

OPEN & CLOSE
STOP
* Shipped from Factory
CLOSE CONTROL WIRING OPTIONS
SAFETY EDGE *C2 WIRING - Constant Presssure to Close
RED WIRE ON TERMINAL #12 (Shipped from Factory)
B2 WIRING - Momentary Contact to Close
MOVE RED WIRE FROM TERMINAL #12 TO TERMINAL #2

15
 S C H E M AT I C D I A G R A M F O R B M T 5 0 1 1 • 1 7 5 4

(OPTIONAL)
(OPTIONAL)
BIMETAL
LIGHT
W
RELAY
C B
MAX.
100W

BK
A W
CLOSE-B Y
BL
C N.O.

W
RES. MOTOR *

O/L BK
L2 BK
OPEN-A L1
Y
R
CAPACITOR BR

R
BK

CLOSE-C
BRAKE SOLENOID
OPEN-C
BL/BK
WIRE NUT
PR1.
W
3 STOP 4 Y (WHEN PRESENT) 10VA.
Y
R3
HAND CHAIN 24VAC.
MOVE JUMPER WIRE TO
INTERLOCK SW. SEC.
TERMINAL #2 FOR MOMENTARY
R
CONTACT ON CLOSE
CLOSE-A
BL 12 BL R
BR BR C N.O.
R1 OPEN-B

OPEN OR OPEN L.S.

1 OR OR W
OP 11
N.C. C
SAFETY AUX.
EDGE 10 CLOSE L/S
OR
GY GY
GY
A.R.S. BOARD
(When Present)
Y
5 4 3 2 1

W
PULL SWITCH
TO
OPEN & CLOSE AUX. W
Y Y
R2 OPEN
7
L/S
R
P
CLOSE CLOSE L/S
P P
CL W
2 N.C. C

* TO REVERSE MOTOR ROTATION, INTERCHANGE

RED AND YELLOW MOTOR WIRES.

16
 WIRING DIAGRAM FOR BMT5011 • 1754
W

W OPEN OR P CLOSE
COM N.C. COM

OR
N.C.
Y AUX.OPEN P
N.C.
AUX.CLOSE
N.O. COM
GY
GY

W R3
Y RADIO
R2
REC’R
BR R1

TO REVERSE MOTOR DIRECTION,

INTERCHANGE RED & YELLOW WIRES.
RESISTOR
MOTOR
Y Y Y
O/L
BRAKE
SOLENOID
CAPACITOR
BR
R R
BK BL/BK
R WIRE NUT BL/BK
W
BL
R
B C A B C A
W BL NC NC NC NC
PRIMARY OR NO NO W NO NO
BK C C C C
BR
XFMR
OP CL
Y
SECONDARY BL R
BL/BK
Y P

COM
**INTLK. N.O.Y
P

GY
5
R OR
4
OR P BR Y Y GY W BL BK BK
3
2
GROUND
1 1 2 3 4 7 10 11 12 L1 L2

A.R.S. BOARD
(When Present) See Close Control
OPEN Wiring Options Below
RATED LINE
CLOSE VOLTAGE * Shipped from Factory
CLOSE CONTROL WIRING OPTIONS
PULL SWITCH *C2 WIRING - Constant Presssure to Close
STOP TO OPEN & RED WIRE ON TERMINAL #12 (Shipped from Factory)
B2 WIRING - Momentary Contact to Close
CLOSE MOVE RED WIRE FROM TERMINAL #12 TO TERMINAL #2
SAFETY
EDGE
** INTERLOCK SWITCH (WHEN SUPPLIED)
WIRED N.O. HELD CLOSED.

17
 ELECTRICAL BOX

L5
L7
L3
S3

S4
L1

L6

L3
L7
10

S3
L2

S4
7

8 4 S2

S5 S1

5
L2

L4

1
6
11

18
 REPAIR PARTS - ELECTRICAL BOX
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 13 for all repair part ordering information.

Complete Electrical Box Motor Kits

K-MT5011 Model MT5011, 115V Single Phase K20-5150LD Models MT5011, BMT5011
K-MT5025 Model MT5025, 230V 50Hz K20-5250LD Models MT5025, BMT5025
K-BMT5011 Model BMT5011, 115V Single Phase
K-BMT5025 Model BMT5025, 230V 50Hz

Electrical Box Sub-Assemblies

K72-12487 Limit Shaft Assembly
K75-12493 Limit Switch Assembly
K75-12489 Auto Reversal System(ARS) PCB

INDIVIDUAL PARTS VARIABLE COMPONENT KITS

ITEM PART # DESCRIPTION QTY

BMT5011

BMT5025
MT5011

MT5025
1 10-10315 MT Electrical Box 1
2 10-10316 MT Electrical Box Cover 1
PART # DESCRIPTION
3 23-10916 SPDT Interlock Switch
(Not on MT) 1 13-10024 Limit Nut • • • •
4 29-2 Resistor, 2 Ohm 1 23-10041 Limit Switch • • • •
5 42-10040 Terminal Assembly 3 Lug 1 29-2 Resistor, 2 Ohm • • • •
6 42-110 10 Position Terminal Block 1 21-10340 Transformer, 115V • •
7 71-10345 RPM Sensor Board (MT Only) 1 21-5230 Transformer, 230V • •
8 74-10352 RPM Sensor Board Harness 1 29-10338 Capacitor, 70MFD • •
9 (See Var. Comp.) Transformer 1 29-12110 Capacitor, 20MFD • •
10 (See Var. Comp.) Relay, 24V 2 24-24-1 Relay, DPDT • •
11 (See Var. Comp.) Motor Capacitor 1 24-24-6 Relay, 3PDT • •
Not Shown
31-10350 Standoff
K75-12489 MT Auto Reversal System K72-12487 • LIMIT SHAFT ASSEMBLY KIT
(ARS) Logic
ITEM PART # DESCRIPTION QTY
L1 11-10321 Limit Shaft 1
L2 Flange Bearing 3/8" I.D. 2
K75-12493 • LIMIT SWITCH ASSEMBLY KIT L3 13-10024 Limit Nut 2
ITEM PART # DESCRIPTION QTY L4 Sprocket 48B9 x 3/8"
Powder Metal 1
S1 Depress Plate 1
L5 RPM Sensor Interrupter Cup 1
S2 Spring, Depress Plate 2
L6 Rollpin 1/8 x 1" Long 1
S3 23-10041 Limit Switch 4
L7 E Ring, 3/8" 2
S4 Standoff, Limit Switch 8
S5 Nut, Double Tinnerman 4

19
 I L L U S T R AT E D PA R T S

H4

H6

H8

H3

H5

3
4

O4 H7
O9 Brake Componets Model BMT Only
H2

O6
O2 B7
O3 H1
B4
O1

C3 B11
O8

O8 B2

O8

C13

C11 O2
C12

C2
O5

O7

MTR

C6
C3
1
B1
C7
C4
C9

B8 C1 C14
C10

C8

C5

B3

B6

B9
B10
Brake Componets - Model BMT Only

B5

20
 REPAIR PARTS KITS
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 13 for all
repair part ordering information.

BRAKE ASSEMBLY KITS K72-12471 CLUTCH SHAFT ASSEMBLY KIT

ITEM PART # DESCRIPTION QTY ITEM PART # DESCRIPTION QTY

B1 10-10354 Brake Release Arm 2 C1 10-10166 Clutch Plate 1
B2 10-10355 Solenoid Link 1 C2 11-10320 Clutch Shaft 1
B3 10-10356 Brake Mounting Plate 1 C3 12-10029 Bearing 3/4" I.D. 2
B4 10-10357 Solenoid Bracket 1 C4 15-48B10GXX Sprocket, 48B10 x 3/4" 1
B5 17-10363 Pulley & Disc Assembly 1 C5 16-4L290 Cogged Belt 1
B6 Compression Spring C6 17-10336 4L Motor Pulley 7" O.D. 1
.360 O.D. x .045WD 4 C7 18-10164 Spring, Clutch (1/3 & 1/2 HP) 1
B7 22-120 115V Brake Solenoid 1 C8 39-10167 Clutch Disc 1
22-240 230V Brake Solenoid 1 C9 84-SH-76 Castle Nut 3/4-16 1
B8 31-10364 Spacer .20 I.D. x .260 OD x 1 2 C10 86-CP04-112 Cotterpin 1/8" x 1-3/4" Long 1
B9 75-10359 Brake Plate Pad Assembly 1 C11 86-RP08-102 Roll Pin 1/4" x 1-1/8" Long 1
B10 82-NH25-03 1/4-20 x 3/16 S.S. Knurled Cup 1 C12 86-RP08-200 Roll Pin 1/4" x 2" Long 1
B11 86-CP05-108 Cotterpin 5/32" x 1-1/2" Long 1 C13 87-P-075 Turac 3/4" Push on Fastener 2
C14 85-FW-75 Flatwasher 3/4" 5
Brake kits for model BMT only
K75-12492 Model BMT5011
K75-12494 Model BMT5025 K72-12472 OUTPUT SHAFT KIT

ITEM PART # DESCRIPTION QTY

K77-12486 HARDWARE KIT O1 11-10319 Output Shaft 1
O2 12-10029 Bearing 3/4" I.D. 2
ITEM PART # DESCRIPTION QTY O3 15-48B10GXX Sprocket, 48B10 x 3/4" 1
H1 10-10203 Curved Arm 1 O4 15-48B10G1 Sprocket, 48B10 x 3/4"
H2 10-10204 Door Bracket 1 Powder Metal 1
H3 10-10205 Header Bracket 1 O5 15-48B24GXX Sprocket, 48B24 x 3/4" 1
H4 11-10130 Header Pivot Pin 1 O6 19-48027M Chain #48 x 27 Links
H5 75-10170 Slider Assembly 1 with master link 1
H6 75-10174 Front Idler Assembly 1 O7 19-48033M Chain #48 x 33 Links
H8 75-10259 Track Spacer Assembly 2 with master link 1
O8 86-RP08-102 Roll Pin 1/4" x 1-1/8" Long 3
K75-12870 STRAIGHT & CURVED ARM ASSEMBLY
O9 87-P-075 Turac 3/4" Push on Fastener 2
H1 10-10203 Curved Arm 1
H2 10-10204 Door Bracket 1
H7 75-10214 Straight Arm Assembly 1 Heavy Duty Straight Arm

PART # DESCRIPTION
K75-17034 Upgrade Kit
ELECTRICAL BOX REPLACEMENT KITS

ITEM DESCRIPTION KIT # DOOR TRACK & DRIVE CHAIN

EB Electrical Box Replacement Kits See page 19
ITEM PART # DESCRIPTION
3 19-5810 #48 Chain Doors 8' to 10'
MOTOR 19-5812 #48 Chain Doors to 12'
See page 19 for more information. 19-5814 #48 Chain Doors to 14'
4 Door Track*

*Call for pricing and availability.

21
O P E R AT O R N O T E S

22
O P E R AT O R N O T E S

23
 CONTROL CONNECTION DIAGRAM
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 terminals 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.
4) When adding accessories, install them one at a time and test each one after it is added to ensure proper installation and
operation with the Commercial Door Operator.
5) Attention Electrician: Use 16 gauge or heavier wire for all control circuit wiring.

3 BUTTON STATION OR 3 POSITION KEYSWITCH WITH SPRING RETURN TO CENTER AND STOP BUTTON

STANDARD 2 OR MORE KEY LOCKOUT

1 2 3 4 1 2 3 4 1 2 3 4

Open Open
Open Open

Close Close
Close Close
Stop Stop
Stop Stop

Keyswitch

2 BUTTON STATION OR 3 POSITION KEYSWITCH WITH SPRING RETURN TO CENTER

STANDARD 2 OR MORE
1 2 4 1 2 4

SEE NOTE #2 SEE NOTE #2

Open Open Open

Close Close Close

1 BUTTON STATION OR ANY AUXILIARY DEVICE RESIDENTIAL RADIO CONTROLS

OPEN TIMER TO CLOSE

3 7
R1 R2 R3 EXTERNAL
TERMINAL BLOCK

To Open, Close and Reverse while closing RADIO CONTROL

SENSING DEVICE TO REVERSE OR STOP EXTERNAL INTERLOCK

3 4
3 10

Sensing Device STOP EXT.

INTERLOCK

©2008, The Chamberlain Group, Inc.

01-10332N All Rights Reserved
 HOW TO ORDER
REPAIR PARTS
DEVANCO CANADA
19192 HAY ROAD, UNIT Q
SUMMERSTOWN, ON K0C 2E0
TOLL FREE: 855-931-3334
www.devancocanada.com
WHEN ORDERING REPAIR PARTS
PLEASE SUPPLY THE
FOLLOWING INFORMATION:
3 PART NUMBER
3 DESCRIPTION
3 MODEL NUMBER