Lynx MDJ User manual

OWNER’S MANUAL
MODEL NO. MDJ, MDJH, MDJB, MDJBH
MEDIUM DUTY JACK SHAFT OPERATOR
READ AND FOLLOW ALL INSTALLATION INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This unit is intended for limited
duty applications not to exceed
12 cycles of opening and
closing per hour.
NOT FOR RESIDENTIAL USE
0MAGA0AA - CDJ MANUAL - 03

To prevent SERIOUS INJURY or DEATH:
• DO NOT connect electric power until instructed to
do so.
• ALWAYS call a trained professional door
serviceman if door binds, sticks or is out of balance.
An unbalanced door may not reverse when
required.
• NEVER try to loosen, move or adjust doors, door
springs, cables, pulleys, brackets or their hardware,
ALL of which are under EXTREME tension and can cause
SERIOUS PERSONAL INJURY.
• DISABLE ALL locks and remove ALL ropes connected to
door BEFORE installing and operating door operator to avoid
entanglement.
MOTOR
It is imperative that the wall or mounting surface provide
adequate support for the operator.
The surface must:
a. Be rigid to prevent play between operator and door
shaft. (Spreader bars will also be of aid when the door
shaft is not supported properly by an end bearing)
b. Provide a level base
c. Permit the operator to be fastened securely and with
the drive shaft parallel to the door shaft.
The safety and wear of the operator will be adversely
e󰀨ectedifanyoftheaboverequirementsarenotmet.
For metal buildings, fasten 2” x 2” x 3/16” (or larger) angle
iron frames to the building purlins. Retain 7-1/2” between
frames (Figure 1).
SAFETYSPECIFICATIONS
TYPE: Intermittent duty
HP: 1/2 HP
SPEED: 1500 RPM
VOLTAGE: 115V 1 Phase 60Hz
CURRENT: See motor nameplate
ELECTRICAL
TRANSFORMER: 24VAC
CONTROL STATION: 3-button station
OPEN/CLOSE/STOP
WIRING TYPE: B2 (Standard, when powered)
C2 (When photoeyes are
blocked or not present)
LIMIT ADJUST: Linear driven, fully adjustable
screw type cams. Adjustable to
24 feet.
MDJ, MDJH, MDJB, MDJBH
MECHANICAL
SAFETY
PREPARATION
MDJ, MDJH, MDJB, MDJBH
All MDJ, MDJH, MDJB, and MDJBH operators have dual
output shafts and may be mounted on either the right
(standard) or the left side of the door. Install the sprocket on
the side desired and insert the key. Be sure to tighten Both
set screws securely.
DRIVE REDUCTION: Primary: Heavy duty (4L) V-Belt
Secondary: #41 chain/sprocket
Output: #41 chain
OUTPUT SHAFT
SPEED:
27 RPM
DOOR SPEED: Approx. 5.4” per sec. depending
on door.
BRAKE (Optional): Solenoid actuated drum brake
BEARINGS/BUSH-
INGS:
Ball bearing with hardened
races & Oil Impregnated
Bushings
HAND CHAIN
WHEEL(optional):
Left or Right
DIMENSIONS & WEIGHT
HANGING WEIGHT: 65-75 LBS
SHIPPING WEIGHT: 85-95 LBS
DISCONNECT: All Models: Floor level
disconnect for manual door
operation.
REVERSING EDGE: (Optional) Electric or pneumatic
sensing device attached to
the bottom edge of door.
A REVERSING EDGE IS
STRONGLY RECOMMENDED
FOR ALL COMMERCIAL
OPERATOR INSTALLATIONS.
REQUIRED WHEN THE 3
BUTTON CONTROL STATION
IS OUT OF SIGHT OF DOOR
OR ANY OTHER CONTROL
(AUTOMATIC OR MANUAL) IS
USED.
WARNING WARNING
TO ACCOMODATE
10" HOLE SPACING
2 3
Improperly operating or
an unbalanced door could
cause SERIOUS INJURY
or DEATH. See Door
Manufacturer’s Owner’s Manual. Have trained
door systems technicians make repairs to
cables, spring assemblies, and other hardware.
IMPORTANT NOTE: To aid installation, see page 16
(Shop Drawing) for mounting consideration.

Broken Spring(s) may cause the door to fall rapidly,
causing SEVERE INJURY or DEATH. If possible
only use the manual release when the door is closed,
otherwise use caution when using the release while the
door is open.
Moving chain could
cause possible SERIOUS
INJURY. DISCONNECT
electric power to the
operator BEFORE manually
operating your door
IMPORTANT NOTE: Before your operator is installed, be sure the door has been properly aligned, balanced, and is working
smoothly.
Sash Chain
Hand Chain
Sash Chain Lock
Wall Bracket
Pull Ring
INSTALLATION
1. Wall Mount:
A The operator should generally be installed below
the door shaft, and as close to the door as possible.
The optimum distance between the door shaft and
operator drive shaft is between 12-1/2” - 15-1/2”
(Figure 2)
B Place the door sprocket on the door shaft. Do not
insert the key at this time.
C Ensure the drive sprocket on the operator is on the
appropriate side.
D Wrap the drive chain around the door sprocket and
join the roller chains end together with master link.
(NOTE: The chain may need to be made shorter
depending on the operator mounting position)
E Raise the operator to approximate mounting position
and position the chain over the operator drive
sprocket.
F Raise or lower the operator until the chain is taut (not
tight). Make sure the operator output shaft is parallel
to the door shaft and secure the operator in position.
G Align the door sprocket to the operator drive sprocket
(Figure 3), insert the key, and secure with BOTH set
screws.
2. Install Hand Chain (Models MDJH and MDJBH
only): Thread hand chain around hand chain wheel
ensuring that it passes through both openings in the
hand chain guide. Remove enough links that so that
theloophangsapproximatelytwofeetabovetheoor.
3. Mount Manual Disconnect/Chain Keeper: Using
suitable hardware, mount the manual disconnect
directly beneath the operator approximately four
(4)feetabovetheoor.Installthesashchainon
the spring that hangs from the operator and thread
through the sach chain lock (Figure 4, page 5). Pulling
down on the sash chain pull ring, should disengage
the motor from door assembly allowing for manual
operation.
Optimum Distance
12 1/2" - 15 1/2"
Use Speader Bars
as Applicable
MDJ, MDJH, MDJB, MDJBH
MANUAL OPERATION
MDJ, MDJH, MDJB, MDJBH
FIGURE 3
Be sure door
sprocket is properly
aligned to drive
sprocket before
securing to the shaft
FIGURE 2
FIGURE 4 FIGURE 5
This operator has provisions for manually operating the door in case of emergency or power failure.
1. Pull the sash chain down until it is tight. Then lock it into the sash chain lock in the wall bracket (Figure 4). This will
disengage the motor. It will also engage the hoist mechanism if present.
2. Operate the door manually as desired.
3. To return to electrical operation, release the sash chain from the lock (Figure 4).
WARNING WARNING WARNING
4 5
Moving parts on the operator could cause possible SERIOUS INJURY. Install the
operatoratleast8feetabovetheoortokeeppeopleawayfromthemovingparts.
NOTE: When pulling the release mechanism, the manual disconnect switch circuit will open to stop motor movement from
occuring (Figure 5).
Manual Disconnect Switch

To reduce the risk of SEVERE INJURY or DEATH:
• ANY maintenance to the operator or in the area near the operator MUST NOT be performed until
disconnecting the electrical power and locking-out the power via the operator power switch. Upon
completion of maintenance the area MUST be cleared and secured, at that time the unit may be returned
to service.
• DISCONNECT power at the fuse box BEFORE proceeding. Operator MUST be properly grounded
and connected in accordance with local electrical codes. The operator should be on a separate fused line
of adequate capacity.
• ALLelectricalconnectionsMUSTbemadebyaqualiedindividual.
• DO NOT install ANY wiring or attempt to run the operator without consulting the wiring diagram. We
recommend that you install an optional reversing edge BEFORE proceeding with the control station installation.
• ALL power wiring should be on a dedicated circuit and well protected. The location of the power disconnect should
be visible and clearly labeled.
• ALL power and control wiring must be run in separate conduit.
• To avoid damage to door and operator, make ALL door locks inoperative. Secure lock(s) in “OPEN” position. If the
door lock needs to remain functional, install an interlock switch.
To avoid SERIOUS PERSONAL
INJURY or DEATH from
electrocution, disconnect electric
power BEFORE manually moving
limit nuts.
POWER WIRING CONNECTIONS
1. DO NOT INSTALL ANY WIRING WITHOUT
CONSULTING THE WIRING DIAGRAM.
The wiring diagram is included in this
manual (page 14).
2. Be sure the power being supplied is of
the correct voltage, phase, frequency, and
amperage in accordance with the operator’s
serial tag.
3. Using a conduit access hole as shown
below, bring supply lines to the operator and
connect wires to the terminals indicated on
the wiring diagram.
4. Important NOTE: Connect earth ground to
the chassis ground screw in the electrical
box enclosure. Do not turn power on
untilyouhavenishedmakingallpower
and control wiring connections and have
completed the limit switch adjustment
procedure.
(3) 7/8" & (1) 1-1/16" Dia.
Knockouts for Power &
ControlWiring Access
(Near and Opposite Side)
SENSING EDGES
All types of sensing edges with an isolated normally
open (N.O.) output are compatible with your operator.
This includes pneumatic and electric edges. If your door
does not have a 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.
ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL)
IMPORTANT NOTES:
a. Proceed with Limit Switch adjustments before
making any sensing edge wiring connections to
operator as described below.
b. Electrician must hardwire the junction box to the
operator electrical box in accordance with local
codes.
WIRING: For wiring of your sensing device to the operator,
refer to the wiring diagram supplied with your operator. See
eldconnectionterminalsidentiedasSafetyDevice.
TAKE-UP REEL: Take-up reel should be installed 12” above
the top of the door.
COIL CORD: Connect operator end of coil cord to junction box
(not supplied) fastened to the wall approximately halfway up
the door opening.
LIMIT SWITCH ADJUSTMENT
1. To adjust limit nuts depress retaining plate
to allow nut to spin freely. After adjustment,
release plate and ensure it seats fully in
slots of both nuts.
2. To increase door travel, spin nut away from
actuator. To decrease door travel, spin limit
nut toward actuator.
3. Adjust open limit nut so that door will stop
in open position with the bottom of the door
even with top of door opening.
4. Repeat Steps 1 and 2 for close cycle. Adjust
close limit nut so that actuator is engaged as
doorfullyseatsattheoor.
IMPORTANT NOTE: Make sure the limit nuts are positioned
between the limit switch actuators before proceeding with
adjustments.
MDJ, MDJH, MDJB, MDJBH
Retaining Plate
OPEN
Limit Switch
CLOSE
Limit Switch
ADVANCED Close Limit Switch
FIGURE 6
To reduce risk of SEVERE INJURY or
DEATH, ALWAYS install reversing sensors
when the 3-button control station is out of
sight of door or ANY other control (automatic
or manual is used. Reversing devices are
recommended for all installations.
POWER WIRING
MDJ, MDJH, MDJB, MDJBH
FIGURE 7
WARNING
WARNING
WARNING
6 7

WIRING TYPE
MDJ, MDJH, MDJB, and MDJBH models are equipped
with the LX900 board (programing and operation, page
11,eldwiring,page15).Uponinstallationtheoperator
will be in C2 mode (which means only constant pressure
will close the door).
To achieve B2 mode (where a momentary contact can be
used to close the door) an entrapment protection device
must be wired into the beam terminals according to the
wiring diagram. Once the LX900 detects there is no
obstruction it will switch to B2 Mode.
CONTROL STATION LOCATION
All operators are supplied with some type of control
station. Generally a three button station (OPEN/
CLOSED/STOP) is provided. Mount the control station
withinsightofthedoor,ataminimumofve(5)feet
abovetheoorsochildrencannotreachitandawayfrom
any moving parts of the door.
RADIO CONTROL
All MDJ series operators have internal antenna’s. LX900
compatible Single button, three button, or OPEN/CLOSE/
STOP (OCS) transmitter(s) are optional accessories.
While in B2 Mode, transmitters will operate the door the
same as a wall control station. Also on all MDJ series
operators, terminal strip is provided on the side of the
electrical enclosure labeled as a 24 Volt Class 2 circuit
and numbered (1,2,3). All standard radio receivers
may be wired to this terminal strip. Single channel
transmitters will then open a fully closed door, close a
fully open door, and reverse a closing door from the radio
transmitter. However, for complete door control from a
remote, a commercial three-channel radio receiver (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
control board in accordance with the LX900 WIRING
CONNECTIONS diagram. Any control with a normally
open (N.O.) isolated output contact may be connected in
parallel with the OPEN button or to the momentary switch
terminals. More than one device may be connected in this
manner. Use 18 gauge wire or larger for all controls.
External Interlock Switch
If an external interlock switch is required on the door, refer to the LX900 WIRING CONNECTIONS diagram for installation.
This switch should have a contact rating of at least 3 amps @ 24VAC. The switch must be wired in series with the STOP
and hoist switch circuit so that the door will only operate while the switch is in its closed circuit state (See wiring diagram
on page 14).
To prevent possible SERIOUS INJURY or
DEATH from a moving garage door:
• ALWAYS keep remote controls out of
reach of children.
• NEVER permit children to operate, or
play with remote controls.
• Activate gate or door ONLY when it can be seen
clearly, is properly adjusted, and there are no
obstructions to door travel.
• ALWAYS keep gate or garage door in sight until
completely closed. NEVER permit anyone to cross
path of moving gate or door.
To prevent possible SERIOUS INJURY or
DEATH:
• Install the control station within sight of
thedoorataminimumofve(5)feet(to
prevent operation by children), but away
from the door and its hardware.
• Install reversing sensors when the 3-button control
station is out of sight of the door or ANY other control
(automatic or manual) is used. Reversing devices are
recommended for ALL installations
• A reversing edge MUST be installed when a receiver
is used to activate a commercial door opener.
CONTROL WIRING
MDJ, MDJH, MDJB, MDJBH
IMPORTANT NOTE:
Mount warning notice beside or below the push button
station.
WARNING
WARNING
8 MDJ, MDJH, MDJB, MDJBH 9
PHOTO EYE INSTALLATION
1. Make sure that power is disconnected to the system prior to installing the photo eyes.
2. Photo eyes need to be mounted inside the building. They should be mounted on either side of the door and as close
aspossibletothedoortracktoo󰀨ermaximumsafetyprecaution.
3. Photoeyesshouldbemountednomorethan6inchesfromtheoor.Bothbracketsneedtobeinstalledatthesame
height to allow them to align.
4. Selectamountinglocation5inchesabovetheoortothecenterlineofthewallmounting“L”bracket.Mountthe
bracket to the wall. Repeat this step on the opposite side of the door.
5. Using the wing nuts provided, attach the photo eyes to the “L”
brackets with the arrows pointing up. Do not over tighten.
6. The transmitter and the receiver both have two 22-gauge wires
coming from them. Uncoil the wires from the photo eyes and route
them to the controller. Take one wire from the transmitter and one wire
from the receiver (these wires have no polarity) and twist the stripped
ends together. Repeat on the second wire from each unit. Connect the
wires to the BEAM terminals. Again, polarity is not important.
7. At this time, you can reconnect the power to the operator. The LEDs
on both transmitter and receiver will be lit if installed and aligned
properly; the transmitter has a red LED, and the receiver has a green LED.
8. Ifthephotoeyesarenotaligned,thenthegreenLEDonthereceiverwillbeo󰀨.Toalignthephotoeyes,youcan
adjust the position of the transmitter or the receiver on the slot of the bracket until both LEDs are lit. Tighten the
brackets.
9. To test the photo eye system: open the door to the full open position. Close the door and as the door is closing,
obstruct the beam. The door should stop and reverse to open.
10. Test the photo eye’s function periodically.
PHOTO EYE INSTALLATION
IMPORTANT NOTE:
Identify which side of the garage door is exposed to the most
sunlight. Mount the sending unit (TX) on the side that is exposed
tothemostsun.Sunlightmaya󰀨ectthephotosensorsandthis
orientationwillhelpreducethee󰀨ect.
11
Wired Infrared Safety Sensor Bracket Installation
Tools Required: Ratchet wrench, tape measure, power drill, 1/4 inch drill bit, 1/2 inch socket, pencil
IMPORTANT: BOTH WALL BRACKETS MUST BE MOUNTED AT THE SAME HEIGHT FOR PROPER ALIGNMENT.
IMPORTANT: IDENTIFY WHICH SIDE OF THE GARAGE DOOR IS EXPOSED TO THE MOST SUNLIGHT.
MOUNT THE SENDING UNIT (UNIT WITH RED LED) ON THE SIDE WHICH IS EXPOSED TO THE MOST SUN.
SUNLIGHT MAY AFFECT THE SAFETY SENSORS AND THIS ORIENTATION WILL HELP REDUCE THE EFFECT.
Wall Mounting Bracket
5”
Note: Use the following steps to install sensors on both sides of the door
Select and mark with a pencil a mounting location no more than 5 inches above the oor to the
center line of the wall mounting bracket.
The safety sensors should be mounted as close
to the door track or inside edge of the door as
possible to oer maximum entrapment
protection. It is very important that both
brackets be mounted at the same height for
proper alignment.
Drill pilot hole using a1/4 inch drill bit. Attach
bracket to wall using provided 5/16 x 1-1/2 lag
screw and nail as illustrated.
In some installations it may be necessary to
attach a wooden spacer to the wall to achieve
the required alignment.
After both brackets are mounted attach sensor
units to brackets using wing nuts. Be sure arrow
on sensors are pointing up.
Arrow on the sensor
pointing up
17
FIGURE 8
FIGURE 9

LX900 PROGRAMMING AND OPERATION
MDJ, MDJH, MDJB, MDJBH10
MODES OF OPERATION
Thiscontrollerhasthree(3)di󰀨erentmodesofoperationB2,C2,andTS(TimerSecure).FactorydefaultisB2modeand
the Timer To Close (TTC) is 0 seconds. Anytime the operator does not detect safety beams, it will automatically change to
C2mode.IftheTTCislargerthan0seconds,itwillautomaticallychangetoTSmode.Thereare7xeddelaysforTTC–
3, 15, 30, 45, 60, 90 and 180 seconds. To adjust the setting, hold in the TTC button (refer to diagram). Three LED's above
the TTC button will indicate the current setting on the adjacent chart. After reaching 180 seconds, it will jump back to 0
seconds (default) and the operator will revert to B2 Mode.
C2 Mode
• Momentary press of OPEN will open door.
• Constant pressure required on CLOSE for the door to close.
• Single or three button transmitter will open or stop the door only.
B2 Mode
• Momentary press of OPEN or CLOSE will activate door.
• Single button - reverses a closing door, stops an opening door.
• Transmitters activate operator same as wall stations.
TS Mode
• Button function is the same as B2 mode.
• Includes Timer to Close (TTC) function. The door will automatically close after set time expires. Timer starts when
doorreachestheopenlimit.(WhenrstenteringTSmodeorafterpowerinterruption,momentarypressofOPENwill
start timer if door is at OPEN limit.)
General Notes regarding Mode of Operations:
• AfterpowerinterruptiontherstmoveisOpen.
• STOP button works in all modes of operation. If the 3 button wall station is not connected to the Control board or there
is no jumper between COM and STOP, the motor will not run.
• The Constant Pressure (CP) feature will work only from 3 and 1 button wired Wall Station
• The controller includes a Run Timer: a maximum amount of time the motor will run after receiving either open or close
command. Factory default: 45 seconds. Not adjustable.
• Open override means that the door may be reversed while closing by activating an OPEN button without the need to
usetheSTOPbuttonrst(forall3Modes).
To reduce the risk of serious injury or death, follow these instructions carefully:
• Read and follow ALL instructions.
• Keepngersandotherbodypartsawayfromallmovingpartsofthedoorandgateoperatorsystem
while it is being operated.
• Keep the radio controls away from children. Do not allow children to play with the controls.
• Keep away from the door when it is in motion. Watch the door while it is moving until completely
closed or opened.
• Do not cross the path of a moving door.
• Disable and locks and remove any ropes connected to the garage door to avoid entanglement and
prevent damage to the system.
• Do not make repairs to cable, springs, or other hardware; call a trained door systems technician. The system is
under extreme tension and can cause serious injury or death.
• Ensure that the door is properly operating and balanced. If not, call a trained door systems technician to make
repairs.
WARNING
MDJ, MDJH, MDJB, MDJBH 11
LX900 PROGRAMMING AND OPERATION
Programming a transmitter: To program a remote transmitter, press and hold the LEARN button for 3 seconds, the learn
LED will turn ON and the operator will stay at LEARN mode for 15 seconds only. While in LEARN mode, press (any)
buttononthetransmitterandnoticethattheLEARNLEDwillashfour(4)times,indicatingthatthetransmitterhasbeen
programmed to the operator. The controller will learn up to 20 Lynx transmitters.
Erase all transmitters: To erase all remote transmitters, press and hold the LEARN button for at least 15 seconds. During
thistimeobservethatthelearnLEDwillturnONand,afterabout10secondstheLEARNLEDwillashthree(3)times
indicating that all the transmitters have been erased from the operator.
LEARN
STOP
CLOSE
OPEN
CLOSE LIMIT
OPEN LIMIT
FAULT
POWER
180 SEC.
90 SEC.
60 SEC.
45 SEC.
15 SEC.
30 SEC.
3 SEC.
0 SEC.
TTC PROGRAM
4 2 1
4 2 1 LED
OPEN CLOSE STOP COM EDGE SINGLE COM BEAMS
*COAXIAL
ANTENNA
CONNECTION
ANTENNA
EXT. RADIO
LIM IT SWITCHES
Timer To Close (TTC)
LED indicator
Timer To Close (TTC)
Programing button
On board Open Close
Stop (OCS) buttons
FIGURE 10
Learn button and
LED indicator

Turn on the power to the operator. Test all controls and safety devices to make sure they are working properly. Refer to
the previous instructions in this manual to make necessary adjustments.
TESTING THE SYSTEM
IMPORTANT NOTE:
Do not leave operator power on unless all safety and entrapment devices have been tested and are working properly.
Be sure you have read and understand all Safety Instructions in this manual.
IMPORTANT NOTE:
Be sure the owner or person(s) responsible for the operation of the door have read and understand the Safety
Instructions, know how to electrically operate the door in a safe manner, and know how to use the manual disconnect
operation of the door system.
MAINTENANCE SCHEDULE
To avoid SERIOUS PESONAL
INJURY or DEATH from
electrocution, disconnect
ALL electric power BEFORE
performing ANY maintenance.
WARNING
13MDJ, MDJH, MDJB, MDJBHMDJ, MDJH, MDJB, MDJBH12
IMPORTANT NOTE:
ITEM PROCEDURE
EVERY
3
MONTHS
EVERY
6
MONTHS
Drive Chain
Check for excessive slack, adjust as needed.
Lubricate.
Sprockets Check for set screw tightness.
Clutch Check, adjust as needed.
Belt Check condition & tightness.
Fasteners Check, tighten if needed.
Manual Disconnect Check & operate.
Brake (if present) Check, adjust as needed.
•
•
••
•
•
•
•
Do not...
• Use grease or silicone
spray
• Lubricate motor
• Lubricate Clutch or V-belt
Do...
• Disconnect ALL electric power
BEFORE performing any
maintenance.
• Use SAE 30 Oil.
• Inspect and service whenever
a malfunction is observed or
suspected.
To prevent possible SERIOUS INJURY or DEATH,
install reversing sensors when the 3-button control
station is out of sight of the door or any other control
(automatic or manual) is used. Reversing devices are
recommended for ALL installations.
CLUTCH ADJUSTMENT
1. Loosen the adjustment jam nuts until
there is little tension on the clutch
spring.
2. Tighten the inner jam nut gradually until
there is just enough tension to permit
the operator to move the door smoothly
but to allow the clutch to slip if the
door is obstructed. When the clutch is
properly adjusted, it should generally be
possible to stop the door by hand during
travel.
3. Tighten the outer jam nut and lock the
nuts in place by tightening them against
one another.
IMPORTANT NOTE:
The adjustable friction clutch is NOT an
automatic reversing device.
Clutch Hub
Fiber Disc
Spring
Adjustment
Jam Nuts
Washer
Clutch Pulley
On models LDJB and LDJBH a brake is supplied from the
factory. It is designed to stop and hold the door in position
whenever power is removed from the motor.
Onrstinstallationthebrakeshouldnotneedadjustment.The
brake operation should be inspected every 3 months. As the
brake pads wear, adjustments need to be made to maintain
proper operation.
With the power disconnected to the
operator, carefully try to rotate the large
drive pulley by hand. The brake should
be engaged and it should be very
di󰀩culttoturn.
While pushing the solenoid plunger
in by hand, there should now be
clearance between the brake pads
and the drum (approximately .020")
allowing the pulley to rotate freely. To
achieve the proper operation, adjust
the upper and lower pad spacing bolts
(A&B) accordingly.
BRAKE ADJUSTMENT
Solenoid
Drum
Lower Brake Pad
Upper Brake Pad
Pivot Plate (C)
Spring Tension
Adjustment Bolt
Upper Pad Spacing Bolt (A)
Lower Pad Spacing Bolt (B)
Solenoid Plunger
WARNING
To avoid SERIOUS PERSONAL
INJURY or DEATH from
electrocution, DISCONNECT
electric power BEFORE
performing any maintenance
WARNING

MDJ, MDJH, MDJB, MDJBH14
WIRING DIAGRAM (FACTORY) WIRING DIAGRAM (FIELD)
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF NAPOLEON/LYNX. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF NAPOLEON/LYNX IS PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
PHOTO EYES
RX
TX
3-BUTTON STATION
OPEN
STOP
CLOSE
3-BUTTON STATION
OPEN
STOP
CLOSE
3-BUTTON STATION
OPEN
STOP
CLOSE
OPEN
CLOSE
STOP
COM
WIRING FOR MULTIPLE 3 BUTTON STATIONS
3-BUTTON STATION
OPEN
STOP
CLOSE
MA
STOP
CLOSE
BEAMS
OPEN
OPEN
STOP
CLOSE
EDGE
COM
SINGLE
COM
LEARN
TTC PROGRAM
*IF USING COAXIAL ANTENNA CUT PROVIDED ANTENNA NEAR CIRCUIT BOARD
NOT POLARITY SENSITIVE
NORMALLY OPEN
SAFETY DEVICE
(OPTIONAL)
MOMENTARY
SWITCH
INTERLOCK
(WHEN NEEDED)
**
Rev. 09/11/15
LX-900 Wiring Connections
*COAXIAL ANTENNA CONNECTION
**Stop and Com must be jumpered when a 3-Button Wall Station is not Present
MDJ, MDJH, MDJB, MDJBH 15
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF NAPOLEON/LYNX. ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION OF NAPOLEON/LYNX IS PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
1 2 3
L3L2L1
Black
White
Blue
Blue
115 Volt AC Single Phase Line In (Ground to case with ground screw provided)
Open Limit
MA
MB
Yellow
Red
Red
Capacitor
Hoist Switch
Stop Circuit Junction
Close Limit
Motor
Thermostat
MDJ
Red
Black
White
Black/White
3-Wire
Blue
Orange
Red
Orange
Red
Blue
Rev. 05/23/22
Brake Solenoid if Required
Advanced
Close Limit

SHOP DRAWING
MDJ, MDJH, MDJB, MDJBH16
14.1"
15.4"
18.0"
0.750"
10.0"
1.50" TYP.
0.50"
0.406"
18.0"
5.5"
6.5"
5.0 " TYP.