Martin DC3700 User manual

2/2002
Martin Door Manufacturing Salt Lake City, Utah 84127-0437 USA www.martindoor.com Printed in the USA 20m Copyright 2002© AD-IM09-05
INSTRUCTION MANUAL
MARTIN DC3700/DC2500 GARAGE DOOR OPENER SYSTEM
TM
DOOR OPENERS
ARTI
N
M
DC3700: Belt only up to 12’ (3700) high doors / DC2500: Chain only up to 10’ (3050) high doors
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Certified
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ISO 9001A8949
MARTIN DOOR MFG.
This instruction manual features “Low Risk” Martin Finger Shield Garage Doors
See page 5 for IMPORTANT INSTALLATION, MAINTENANCE & SAFETY INSTRUCTIONS
WARNING! The back page helps you determine if your garage door is *“HIGH RISK”.
For Installation of residential garage doors:
-All brands* - Center mount only
-Martin models WL, RA, HT, FL SL, SP CM, MO, CH - Center or side mount
-Martin Electric (combination) models WLE, HTE, CME, RAE, FLE, CHE - Center or side mount

2COPYRIGHT © 2002 MARTIN DOOR
MARTIN SIDE MOUNT OPENER INSTALLATION
- May be mounted right side or left side -
WARNING! For Martin Finger Shield Garage Door Systems only.
PACKET FOR OWNERS
DOOR AND OPENER
INSTRUCTION MANUALS
WARNING AND SAFETY LABEL
TORSION SPRING
OPENER DOOR BRACKET
STRAIGHT AND CURVED
POWER ARM
STRUT
EMERGENCY
RELEASE
TAG
EMERGENCY
RELEASE
CORD
KNOB
TOP DOOR SECTION
PHOTO
EYE
LIGHT
LENS
POWER
HEAD
WALL
CONTROL
OR
PUSH
BUTTON
POWER
HEAD
CHASSIS
“C”
BRACKETS
OPTIONAL
PUNCHED ANGLE
RAIL SUPPORT BRACKET
RAIL ASSEMBLY
BELT OR CHAIN
TROLLEY
OPENER HEADER BRACKET
END STOP WITH CLEVIS
PIN AND COTTER RING
TOP ROLLER BRACKET
OPENER DOOR BRACKET
3/8” X 1” SHORT NECK
CARRIAGE BOLT AND
3/8” LOCK NUT
3/8” X 1” SHORT NECK
CARRIAGE BOLT AND
2- 3/8” LOCK NUTS
TOP DOOR SECTION
OPENER
HEADER
BRACKET
END STOP WITH CLEVIS
PIN AND COTTER RING
ANTENNA
WIRE TORSION TUBE

3
COPYRIGHT © 2002 MARTIN DOOR
MARTIN CENTER MOUNT OPENER INSTALLATION
- May be mounted off center -
PACKET FOR OWNERS
DOOR AND OPENER
INSTRUCTION MANUALS
WARNING AND SAFETY LABEL
TORSION SPRING
OPENER DOOR BRACKET
STRAIGHT AND CURVED
POWER ARM
TORSION TUBE
EMERGENCY
RELEASE
TAG
EMERGENCY
RELEASE
CORD
KNOB
TOP DOOR SECTION
PHOTO
EYE
WALL
CONTROL
OR
PUSH
BUTTON
POWER
HEAD
CHASSIS
“C”
BRACKETS
OPTIONAL
PUNCHED ANGLE
RAIL SUPPORT BRACKET
RAIL ASSEMBLY
BELT OR CHAIN
TROLLEY
OPENER HEADER BRACKET
END STOP WITH CLEVIS
PIN AND COTTER RING
PHOTO
EYE
LIGHT
LENS
POWER
HEAD
ANTENNA
WIRE
TOP STRUT

THE FOLLOWING ITEMS ARE HELPFUL TO COMPLETE A SATISFACTORY MARTIN GARAGE DOOR OPENER INSTALLATION:
Hammer
Level (magnetic)
Hacksaw
Wire Cutters
18’ (5.5) measuring tape
Socket wrench set for 7/16“ (11), and 9/16” (14) with 3“ (76) extension
Regular and phillips screwdriver
End wrench set for 7/16“ (11), and 9/16” (14)
10/40 motor oil lubricant
Wax lubricant (paraffin, candle, etc.)
Cordless drill with 1/8“ (3), 13/64” (5), 1/4” (6) bits
plus 1/4” and 3/8” (6 and 10) masonry bits
Step ladder (not shown)
Pencil
Punched angle opener hanger: 8' X 1-1/4" X 1-1/4" (2440 X 32 X 32)
NOTE: Bolts, lock nuts and lag screws for fastening the punched angle are
furnished with the door opener hardware fasteners.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
2.
3.
6.
9.
WAX LUBE
10/40
MT
O
OR
IOL
11.
10. 4.
1.
5
COPYRIGHT © 2002 MARTIN DOOR
7.
MT
G O
GAR
RD
AS
E O
TA RI TA RI
M MN N
14.
8.
6.
5.
13.
ALL MEASUREMENTS IN
PARENTHESIS ( ) ARE
MILLIMETERS IN THIS
INSTRUCTION MANUAL.
!
IMPORTANT
INSTALLATION INSTRUCTIONS
Do not install this opener or any other opener on "HIGH RISK" garage doors that may cause severe injury, entrapment or death!
See back page for serious injuries which may occur if “HIGH RISK” areas are left uncorrected.
Martin Finger Shield Garage Doors are “Low Risk”.
Untrained or Negligent Installing, Adjusting and Servicing can be Dangerous! The
garage door springs and related parts can cause serious injury or death! IF YOU ARE
UNSURE, CALLATRAINED MARTIN DOOR DEALER!
Garage door should be balanced and easy to open and close by hand.
Locks should be disabled and pull down ropes should be removed.
Locate wall control/push button within sight of door, at min. height of 5' (1520) so
small children cannot reach it, and away from all moving parts of door. See Step 8.
Emergency release tag should be installed above knob and adjusted to about
6' (1830) above the floor. Opener should be 7’ (2130) above floor. See Step 9.
Risk of electrical shock is explained in Step10. Do not connect opener to source
of power until instructed to do so.
Entrapment and warning labels should be installed next to the wall control/push
button as explained in Step 14.
IMPORTANT
MAINTENANCE & SAFETY INSTRUCTIONS
Monthly, check the opener's down cycle safety reverse. The door must reverse when it
contacts a 1 1/2" (38) high object (or a 2X4 board laid flat) on the floor, in line with the door
opener. A closing door must also reverse if the photo eyes are interrupted. See Steps 12,13.
Always keep the moving door in sight and away from people and objects until it is
completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.
Do not allow children to operate or play with the garage door controls. Keep the remote
control away from children.
The emergency release should only be used when garage door is in the closed position.
Weak or broken springs may cause door to fall if released in the open position, increasing
the risk of severe injury or death. Use caution when using the release with door open.
Monthly visually check the lift cables, spring assembly, hardware, etc. for wear and stability.
If the Safety Reverse or any other part of the garage door and opener system do not work
properly, or if you do not understand, call a trained Martin Door Dealer.
TO REDUCE THE RISK OF SEVERE INJURY OR
DEATH, READ AND FOLLOW ALL INSTRUCTIONS
TO REDUCE THE RISK OF SEVERE INJURY OR
DEATH, READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE IMPORTANT INSTRUCTIONSSAVE THESE IMPORTANT INSTRUCTIONS

COPYRIGHT © 2002 MARTIN DOOR
6
LEFT SIDE MOUNT INSTALLATION
CENTER AND OFF CENTER MOUNT INSTALLATION
OPENER DOOR BRACKET
STRUT (IF PROVIDED)
END
STILE
TOP ROLLER
BRACKET
OPENER DOOR BRACKET
3/8” LOCK NUTS
3/8”x1”
SHORT
NECK
CARRIAGE
BOLT
CURVED
POWER ARM
3/8” LOCK NUTS
CURVED
POWER
ARM
3/8”x1” SHORT NECK
CARRIAGE BOLT
REQUIRED STRUT
CURVED
POWER ARM
DRILL 1/8” (3) HOLE AND FASTEN OPENER DOOR BRACKET TO STRUT AND DOOR SECTION
TORSION TUBE
OPTIONAL POWER ARM ANGLE
FASTEN OPENER POWER
ARM DIRECTLY TO HOLE
AT SAME HEIGHT AS
TOP ROLLERS
STILE
BOLT
OIL
BOLT
HEAD
OPENER
POWER
ARM
POWER ARM
ANGLE
FASTEN TWO
NUTS TIGHT
AGAINST
POWER ARM
ANGLE
FULL HEIGHT
POWER ARM
ANGLE
(FASTEN POWER ARM ANGLE TO STILE WITH 5 1/4” X 1” THREAD FORMING SCREWS AS SHOWN.)
OPENER POWER ARM SHOULD BE FASTENED
INSIDE THE OPENER DOOR BRACKET
OPENER POWER ARM MUST BE FASTENED
OUTSIDE THE OPENER DOOR BRACKET
OPENER DOOR BRACKET
OPENER DOOR BRACKET GUIDELINES
ONLY Martin Finger Shield Garage Door Systems allow you
to choose center, off center or side mounting for a safer,
more attractive opener installation
WARNING! Other brand doors are designed for center mounted
openers only. Off center or side mounted installations may result
in other brand doors binding, side shifting, twisting, and falling, as
the lift cables detach from the cable drums
.
SPECIAL GUIDELINES:
For 8" (203) low clearance track installations, the strut and
the opener door bracket are fastened 2" (51) lower than
shown.
For 2 ½" (64) and 4 ¼" (108) low clearance track
installations the opener door bracket and top roller bracket are
lowered 2" (51). The strut is not lowered. Fasten the opener
power arm to the top hole of the opener door bracket.
A Martin Opener requires 1 ½" (38) more clearance than the
required garage door clearance.
Doors over 18'2" (5540) wide should use side mount opener
installation only. The opener door bracket will not fit on wide
doors with “U” / “C” struts and double end stiles. If door has
double end stiles with double top roller brackets, drill out hole
in end of curved power arm to 7/16" (14) and attach direct to
the long stem roller shaft between the double top roller
brackets. This makes a solid side mount opener installation.

7
COPYRIGHT © 2002 MARTIN DOOR
OPENER HEADER
BRACKET
FIGURE 2
OPENER DOOR
BRACKET
CURVED POWER ARM
THIN VERTICAL MARK
THIN
HORIZONTAL
MARK
FIGURE 1
OPENER DOOR
BRACKET
CURVED POWER ARM
THIN VERTICAL MARK
TEMPORARY TIE
TEMPORARY TIE
5/16” X 2” LAG SCREWS
1/4” X 1” THREAD
FORMING SCREWS
1/4” X 1” THREAD
FORMING SCREWS
CENTER MOUNT
CENTER MOUNT
INSTALLATION INSTRUCTIONS FOR A MARTIN DC3700 GARAGE DOOR
OPENER SYSTEM
THESE INSTRUCTIONS ARE INTENDED FOR PROFESSIONAL GARAGE DOOR
OPENER INSTALLERS. READ THROUGH THE COMPLETE INSTRUCTION MANUALAND
APPLICABLE SUPPLEMENTAL INSTRUCTIONS BEFORE BEGINNING.
STEP 1
FASTENING THE OPENER DOOR BRACKET
Study "Opener Door Bracket Guidelines” on page 6.
Decide if the opener will be mounted to the center, off center or side of the garage door.
Center and off center mounted openers always require a “full width” top strut on the door. If
side mounted, Martin Doors up to 12'2" (3700) wide may or may not require a top strut.
Fasten the opener door bracket under the top roller bracket for side mounting or on the
stile and strut for center/off center mounting. Fasten with 1/4” x 1” Thread Forming Screws.
Fasten the curved power arm to the opener door bracket with 3/8" X 1" short neck carriage
bolt and two 3/8" lock nuts as shown in the “Opener Door Bracket Guidelines” on page 6.
Raise the curved opener power arm straight up and touch the torsion tube or spring. Make
a vertical mark on header, in line with the power arm. This mark will be the vertically
centered location for the opener header bracket. See Figure 1
Note: To hold the top of the curved power arm from falling down, temporarily tie it to the top
of the door bracket or strut. See Figure 1
Make a horizontal mark on the header 2" (51) above the highest movement of the door as
it opens. See figure 2.
The following are approximate measurements above the top of a closed door to the
horizontal mark on the header:
11 1/2" (292) for 12” (305) regular clearance track.
6 1/2" (165) for 8" (203) low clearance track.
5" (127) for 4 1/4" (108) low clearance track.
3 1/2" (89) for 2 ½" (64) low clearance track.
Fasten the opener header bracket to the header with two 5/16" X 2" lag screws. The
vertical and horizontal marks are the “centered location” marks.
STEP 2
FASTENING THE OPENER HEADER BRACKET
11 ½” (292)
Regular Clearance
TOP OF
CLOSED DOOR
3/8” X 1” SHORT NECK
CARRIAGE BOLT AND
2- 3/8” LOCK NUTS
HEADER
HEADER
REQUIRED
“FULL WIDTH”
TOP STRUT
REQUIRED
“FULL WIDTH”
TOP STRUT

COPYRIGHT © 2002 MARTIN DOOR
FIGURE 4
FIGURE 5
“C” BRACKET
STEP 3
FASTENING THE RAIL ASSEMBLY TO THE POWER HEAD
Place the rail assembly onto the power head chassis by lining up the sprocket assembly
opening with motor shaft. Make sure the shaft engages teeth inside sprocket assembly.
Press rail assembly down firmly onto shaft and power head chassis. DO NOT HAMMER!
Fasten 2 "C" brackets over rail assembly and onto chassis. Flanges on "C" brackets must
fit into the four recessed areas on chassis. The rail assembly must be at a right angle to
the power head for the "C" brackets to fit properly. See Figure 3
Insert 6 X 14 mm chassis screws through "C" bracket holes and into chassis holes, and
tighten screws by hand with a phillips screw driver. The “C” brackets must firmly hold rail
assembly to chassis. See Figures 3, 4.
Do not remove tape around the trolley and straight power arm until Step 9. The trolley
has been taped at the correct location so that the belt or chain position tab will activate the
position switch, and opener computer correctly. The activation begins when the opener
opens the door, from the closed position, for the first time. See Figure 5
Place power head on stepladder, positioning front of rail assembly on torsion tube (or on
torsion spring if side mounted) for stability. See Figure 5
Position rail assembly end-stop within the opener header bracket and insert clevis pin
through the end-stop and opener header bracket Attach the
cotter ring to the end of the clevis pin. See Figure 6
STEP 4
FASTENING THE RAIL ASSEMBLY TO THE OPENER HEADER BRACKET
8
FIGURE 3
FIGURE 6 (Top View)
6 X 14 mm
CHASSIS SCREW
POWER HEAD CHASSIS
RAIL ASSEMBLY
“C” BRACKETS
SPROCKET
ASSEMBLY
OPENING
POWER HEAD
6 X 14 MM CHASSIS
SCREW
POWER HEAD CHASSIS
MOTOR
SHAFT
POSITION SWITCH
OPENER HEADER BRACKET
CLEVIS PIN
COTTER RING
OPENER HEADER BRACKET
RAIL ASSEMBLY
POWER HEAD
LADDER
CURVED POWER ARM
TOP DOOR SECTION
TOP DOOR
SECTION
AIL SEMB Y
R AS L
TIE
END STOP
TORSION TUBE
TORSION SPRING
“TAPE AROUND TROLLEY”
(DO NOT REMOVE UNTIL
STEP 9)
“C” BRACKET
SPROCKET
OPENING

9
FIGURE 7
STEP 5
MOUNT OPENER TO CEILING
Raise the opener power head high enough to allow the door to
be fully opened. OPEN DOOR BY HAND. Set a 1 ½" (38) high
object on the top part of the door, under the rail assembly. Center
the rail assembly with the opener door bracket. See Figure 11
Twist rail support bracket onto rail assembly. See Figures 7
and 8
Slide the rail support bracket forward or backward on the rail
assembly to the best location for fastening to the ceiling. See
Figure 8
Fasten the 5” (127) punched angle and the rail support
bracket locks to the rail support bracket. See Figure 9
Fasten optional punched angle diagonally from 5” (127)
punched angle to ceiling for correct stability. See Figure 11
NOTE: If clearance is limited, the rail support bracket can be
fastened directly to the ceiling with no 5” (127)
punched angle or rail support bracket locks.
See Figure 8
Fasten an extra rail support bracket to 13'6" (4100) or 15'6" (4700) long rail assemblies for
extra high doors. Fasten the extra rail support bracket to the rail assembly at about 30% to
50% back from header. See Figure 12
FIGURE 8
FIGURE 11
POWER HEAD
CHASSIS 1 1/2” (38) HIGH
OBJECT
CURVED POWER ARM
OPTIONAL PUNCHED ANGLE
RAIL ASSEMBLY
RAIL SUPPORT BRACKET
“C” BRACKET
POWER HEAD
5/16” X 2” LAG SCREW
SUT
TR
TOP DOO S C ION
RE T
RAIL
SUPPORT
BRACKET
RAIL
SUPPORT
BRACKET
RAIL ASSEMBLY
FIGURE 12
EXTRA RAIL SUPPORT
BRACKET FOR 13’6” (4100)
OR 15’6” (4700) RAIL
ASSEMBLY
RAIL ASSEMBLY
OPTIONAL
PUNCHED ANGLE
POWER HEAD
RAIL SUPPORT BRACKET
COPYRIGHT © 2002 MARTIN DOOR
RAIL
ASSEMBLY
TEMPORARY TIE
3/8” LOCK NUTS
FIGURE 9
RAIL SUPPORT
BRACKET
3/8” X 1” SHORT NECK
CARRIAGE BOLTS
5” (127)
PUNCHED
ANGLE
INVISIBLE RAIL
SE B Y
AS M L
INV IBLE RAIL
IS
ASSE BLY
M
RAIL SUPPORT
BRACKET LOCK
POWER HEAD
T
S
I
W
T
FIGURE 10
5” (127)
PUNCHED
ANGLE
RAIL SUPPORT
BRACKET
RAIL SUPPORT
BRACKET LOCK
RAIL ASSEMBLY

10 COPYRIGHT © 2002 MARTIN DOOR
LIGHT LENS
FIGURE 12A
TAB
STEP 6
LIGHT BULBS AND LIGHT LENSES
STEP 7
Twist 2 light bulbs (1 for DC2500), maximum 60W, into light bulb sockets.
Position light lens tabs with corresponding slots in power head chassis. Snap light lens
onto chassis first. Next, position light lens tabs with slots in power head and snap securely
into place. See Figure 12A or 12B
PHOTO EYES SAFETY SYSTEM
CLOSE DOOR BY HAND BEFORE BEGINNING!
MOUNTING PHOTO EYES DIRECTLY TO SIDE WALL:
Locate mounting position 3" (76) to 5" (127) above the floor. Mark and drill 1/16" (1.5) pilot
hole into wall. (If mounting to concrete or drywall instead of wood, use anchors provided
and drill 3/16" (5) pilot hole).
Fasten tapered-head screw into wall. Do not tighten screw. Allow screw head to protrude
(approximately 3/8" (9.5)) from wall.
Position the top slot hole on the back of the photo eye holder onto screw and push down
to lock in place. See Figure 13
Fasten tapered head screw through the curved channel slot at the bottom of the photo
eye holder after drilling correct pilot hole. Repeat process for other photo eye and photo
eye holder. See Figure 13
Align photo eyes so they face each other. In Step 12 you will be instructed to check the
alignment. Tighten wing nut on each photo eye by hand. See Figure 14
MOUNTING PHOTO EYES TO BRACKET:
Locate mounting position 3" (76) to 5" (127) above the floor for photo eye brackets.
Brackets can be mounted in any position as long as photo eye beam has a clear path from
one side of door to the other side after mounting. See pages 4 and 5
Mark and drill two 1/16" (1.5) pilot holes into wall. (If mounting to concrete or drywall
instead of wood, use anchors provided and drill two 3/16" (5) pilot holes).
Using round-head screws provided, fasten bracket to wall. Attach photo eye to bracket by
aligning tabs and center pin and snapping into place Photo eye wiring should exit
downward. Repeat process for other bracket. See Figures 15 and 16
Align photo eyes so they face each other. In Step 12 you will be instructed to check the
alignment. Tighten wing nut on each photo eye by hand. See Figure 16
ATTENTION: In dual door installations, the "Receiver" photo eyes (as marked on each of
the photo eyes) should be mounted on the far outsides. The "Transmitter"
photo eyes should be mounted on the insides.
POWER HEAD
CHASSIS
LIGHT BULB
LIGHT BULB
SOCKET
LIGHT BULB
LIGHT LENS
POWER
HEAD
TAB
SLOTS
SLOTS
FIGURE 13 FIGURE 14
FIGURE 15
FIGURE 16
WING NUT
PHOTO EYE
HOLDERS
DOWN WARD EXIT
FOR WIRING
TAPERED HEAD
SCREW
TAPERED
HEAD SCREW
CURVED
CHANNEL
SLOT
TAPERED HEAD
SCREW
TOP
SLOT
HOLE PHOTO EYE WING
NUT
BOLT
PHOTO EYE
BRACKETS
ROUND
HEAD SCREW WING NUT
PHOTO EYE
WITH HOLDER
WIRING EXITS DOWN
WING
NUT
BOLT
ANTENNA WIRE
LIGHT BULB
LIGHT
LENS
CHAI RAIL
N
ASS BLY NLY
EM O
POWER HEAD
ROUND
HEAD SCREW
PHOTO
EYE
WITH
HOLDER
WING
NUT BOLT
CENTER
PIN
FIGURE 12B
DC3700
DC2500
B LTRAI
EL
ASSEMBL ONL
YY

11
FIGURE 17
***STEP 7 CONTINUED***
See Figure 17
CONNECTING WIRES TO POWER HEAD
Route wiring through clip on bottom of photo eye holder, then run wires along wall and ceiling to power head
chassis. Use provided staples to fasten wiring to wall, joists and/or ceiling. Do not pinch wiring.
NOTE: As an alternative, the wiring can be routed along the top of the rail assembly, or along the outside of the
garage door track. Be sure the wiring is routed away from all moving parts of door and rail assembly.
Open the control panel cover by slightly pulling on the cutout, allowing the cover to hang open. To remove, pull firmly
on the cover corner near one of the hinges. Do not twist cover or hinges may break. See Figure 23
Route wires through wire guide at top of power head chassis into terminal area of control panel. Separate the dbl.
wire from each photo eye into two single wires: 1) the white wire and 2) the black striped wire. See Figure 17
Remove about 1/2" (13) of insulation from the end of each of the four single wires. Twist the white
wire ends together and twist the black striped wire ends together. Insert twisted white wire ends
firmly into terminal hole #1 by pushing directly into hole. If wires are difficult to insert, a screwdriver
may be used to depress the terminal tab while inserting the wires. To remove wiring, depress terminal
tab again and pull wiring out. Repeat procedure for the twisted black striped wire ends, except insert
them into terminal hole #2.
STEP 8
WALL CONTROL / PUSH BUTTON
The wall control/push button will allow you to control your garage door from inside the garage. It
must be mounted within sight of the garage door, clear of all moving garage door parts or any
associated parts, at least 5’ (1520) above the floor, out of children's reach. The wall control/push
button should only be used when the door area is free of people or any obstructions.
FASTENING THE WALL CONTROL:
Attach wiring to back of wall control. White wire end attaches to terminal #3 screw, black striped wire end
attaches to terminal #4 screw.
Locate where top mounting screw will go. Mark location on wall. Drill 1/16" (1.5) pilot hole into wall.
Fasten top screw into wall with screw head out from wall about 1/8” (3). Fasten wall control into top
slot hole by pushing down firmly onto screw head. For drywall, concrete, etc., drill 3/16” (5) pilot hole for
anchors. See Figure 18
Mark and drill 1/16"(1.5) pilot hole through bottom screw hole. Insert screw through bottom hole from the front,
and tighten screw. Route wiring from behind through one of the recessed cutouts. Avoid pinching the wires.
CONNECTING WIRES:
Route wiring through cutout, along wall and ceiling, to opener power head chassis. Use provided staples to secure
wiring. Do not pinch wiring.
Route wiring through wire guide of chassis to terminal area of control panel. See Figure 17
Remove about 1/2" (13) of insulation from the end of each wire. Insert white wire end firmly into terminal hole #3.
Insert black striped wire end into terminal #4. To remove wiring, depress tab and pull out wiring. Multiple wall
controls may be installed, parallel or series, if wires are properly connected to terminals 3 and 4 as explained.
SUT
TR
COPYRIGHT © 2002 MARTIN DOOR
PHOTO EYE
WIRING
RAIL ASSEMBLY
WIRE
GUIDE
TERMINAL
AREA CONTROL PANEL
WIRE
GUIDE
POWER HEAD
CHASSIS
TERMINAL
HOLES
TERMINAL TABS
TERMINAL
NUMBERS
FIGURE 18
SCREW
HEAD
TOP
SLOT
HOLE
WALL CONTROL
SCREW
WHITE
WIRE
BLACK
STRIPED
WIRE
BOTTOM
SCREW
HOLE
POWER HEAD
MTAR IN
MTAR IN
FIGURE 17 - CLOSE-UP
PUSH
BUTTON

12 COPYRIGHT © 2002 MARTIN DOOR
FIGURE 19
STEP 9
FASTENING POWER ARMS
Close the garage door by hand.
Remove tape from rail assembly holding straight power
arm and allow it to hang freely. See Figure 19
Pull the emergency release cord to disconnect trolley.
Slide trolley to about 12" (305) from the opener header
bracket. See Figure 20
Position straight power arm and curved power arm so at
least two sets of holes line up.
Fasten arms together with 3/8" X 1" short neck carriage
bolts and 3/8" lock nuts. Remove Temporary Tie.
See Figures 19 and 20
Pull the emergency release cord to activate trolley. Open
door manually until trolley locks with belt or chain
connector inside rail assembly. Pulling down on the
emergency release cord with the attached knob connects
or disconnects the trolley to the connector on the chain or
belt. See Figure 21
Always close the door before releasing the trolley from the
connector. The emergency release tag must be installed
above the knob and adjusted to about 6' (1830) above the
floor. See Figure 20
Do Not Use the Emergency Release Cord And Knob To
Pull Door Open Or Closed.
FIGURE 20
FIGURE 21 RAIL ASSEMBLY
EMERGENCY RELEASE CORD
PULL DOWN
KNOB
PULL DOWN TO ENGAGE
PULL DOWN TO DISENGAGE
EMERGENCY RELEASE CORD
EMERGENCY RELEASE CORD
KNOB
KNOB
RAIL ASSEMBLY
RAIL ASSEMBLY
REMOVE TAPE
TROLLEY
TROLLEY
STRAIGHT
POWER
ARM
CURVED
POWER
ARM
STRAIGHT AND CURVED
POWER ARM
TORSION TUBE
EMERGENCY
RELEASE
TAG
OPENER
DOOR
BRACKET
OPENER
DOOR
BRACKET
3/8” X 1” SHORT NECK CARRIAGE BOLT
3/8” LOCK NUT
TEMPORARY TIE
12” (305)
MINIMUM

13
STEP 10
STEP 11
CONNECT OPENER TO POWER
CORD AND PLUG
To reduce the risk of electric shock, your opener is provided with an insulated
power cord with a 3-prong grounding plug. The power cord permits easy
connection to and disconnection from an electrical outlet. The power cord must be
plugged-in to a standard grounded outlet. If there is no outlet available at the
location, you must have a qualified electrician install an approved-grounded outlet
at the proper location.
WARNING! To help prevent electrocution or fire, etc., the installation and wiring and
outlet must be done in accordance with local electrical and building codes. DO NOT
use an extension cord. DO NOT use a 3-prong to 2-prong plug adapter. DO NOT
modify or cut off the grounding pin on the plug.
Plug the power cord into a properly grounded outlet. The#8 LED on the opener
control panel will illuminate, showing that the power is on. See Figure 23
OPTIONAL PERMANENT WIRING: (If required by your local electrical code)
WARNING! Contact a qualified electrician to run the necessary wiring to your
opener and to perform the electrical connections.
Disconnect the power at the circuit breaker.
Remove the Power Head Housing. Unsnap the power cord strain relief cover by
disengaging the tabs. Cut the power cord within 6" (152) of the terminal block.
Replace the strain relief cover by snapping tabs back into place. Knock out conduit
hole, and bring in the permanent wiring and conduit. Secure conduit to chassis.
Attach wiring using suitable wire nuts (not provided). Reinstall power head housing.
Connect power at the breaker. The #8 LED on the opener control panel will
illuminate, showing that the power is on. See Figure 22
MARTIN “SMART COMPUTER” CONTROL PANEL
Open and remove the control panel cover by pulling firmly on the cover corner
near one of the hinges. Do not twist cover or hinges may break. See Figure 23
The 3 Control Panel Buttons are labeled "P", "+", and "-”. The circular display
contains 8 numbered LED’s. See Figure 24
NOTE: When setting the adjustments, face the garage door while looking up at the
control panel.
The LED’s show useful information regarding the opener’s normal use as well as
Troubleshooting. See Figure 24
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COPYRIGHT © 2002 MARTIN DOOR
FIGURE 22 OPTIONAL PERMANENT WIRING
FIGURE 23
FIGURE 24
MARTIN “SMART COMPUTER” CONTROL PANEL
CONDUIT
GROUND (GREEN)
HOT (BLACK)
NEUTRAL (WHITE)
TERMINAL BLOCK
CONDUIT
NUT
STRAIN RELIEF
COVER
PERMANENT
WIRING
CONTROL PANEL COVER
CONTROL
PANEL
COVER
REMOVED
POWER
HEAD
HOUSING
CHASSIS
POWER
HEAD
CONTROL PANEL BUTTONS
LED’S
CIRCULAR LED DISPLAY CONTROL PANEL BUTTONS
LIGHT SOCKET
GROUNDED OUTLET
POWER CORD

14
FIGURE 25
***STEP 11 CONTINUED***
SETTING THE ADJUSTMENTS
Before beginning, confirm that the garage door is closed, the opener installation is
complete, the trolley is connected to the chain or belt connector, and the #8 LED is
illuminated showing that the power is on.
The adjustments that can be made are Open Travel Limit, Close Travel Limit, Opening
Force, Closing Force, and the first Transmitter Programming.
REFER TO THE FOLLOWING TO PROGRAM OR CHANGE THE PROGRAM OF THE
MARTIN “SMART COMPUTER”:
TO PROGRAM
Press and hold the "P" button for about 5 seconds. When all LEDs illuminate release the
button. See Figure 25
OPEN TRAVEL LIMIT
LED #2 should be blinking. Press and hold the "+" until the door is in the opened
position. Release this button. If the door is not in the desired position, press the "+" button
or the "-" button to move it slightly. Once the door is in the desired position, press and
release the "P" button. See Figure 26
CLOSE TRAVEL LIMIT
LED #4 should be blinking. Press and hold the "-” button until the door is in the closed
position. Release the button. If the door is not in desired position, press the "+" or the "-"
button to move it slightly. Once the door is in the desired position, press and release the
"P" button. See Figure 27
Attention! Do not close door tight on floor.
UP FORCE
LED #2 and #6 should be blinking. Press and release the "+" or "-" button once. The
illuminated LEDs around the display will display the current force setting. By pressing the
"+" or "-" key, the force can be increased (+) or decreased (-). The force should be set as
low as possible. A suggestion is LEDs #1 and #2 should illuminate for one-car size doors
and LEDs #1, #2, #3 for two-car size doors. Once the desired force is selected, press and
release the "P" button. See Figure 28
BEGIN PROGRAMMING
FIGURE 27
FIGURE 26
OPEN TRAVEL LIMIT
FIGURE 28
COPYRIGHT © 2002 MARTIN DOOR
CLOSE TRAVEL LIMIT
UP FORCE

15
COPYRIGHT © 2002 MARTIN DOOR
FIGURE 29
***STEP 11 CONTINUED***
DOWN FORCE
LED #4 and #6 should be blinking. Press and release the "+" or "-" button once. The
illuminated LEDs around the display will display the current force setting. By pressing the
"+" or "-” key, the force can be increased (+) or decreased (-). The force should be set as
low as possible. A suggestion is LEDs #1 and #2 should illuminate for one-car size doors
and LEDs #1, #2, #3 for two-car size doors. Once the desired force is selected, press and
release the "P" button. See Figure 29
TRANSMITTER PROGRAMMING
LED #7 should be blinking. While LED #7 is blinking, press and hold the desired button on
the transmitter. When the LED #7 blinks rapidly, release the transmitter button. The
opener has now learned the particular code of this transmitter. Press and release the "P"
button. This stores the code in memory. See Figure 30
END PROGRAMMING
LED #8 should be illuminated. Press transmitter button to open and close the door two
times. This allows the opener smart computer to set its complete memory and "learn" the
proper operating levels. Each time the door is opened or closed the #5 LED illuminates
about 2 seconds as the belt or chain activates the position switch on the power head
chassis. This is a visual check regarding computer memory retention. The “smart
computer” retains memory even after a power outage. See Figure 31
NOTE: If one setting needs to be changed without adjusting any of the other settings,
simply press and hold the "P" button for about 5 seconds, then press and release
"P" repeatedly until the desired setting is reached. This bypasses the unneeded
adjustments. When desired setting is complete, simply press "P" as many times as
needed to return the opener to normal operating mode with LED #8 illuminated.
FIGURE 30
DOWN FORCE
TRANSMITTER PROGRAMMING
END PROGRAMMING
FIGURE 31
!
IMPORTANT MAINTENANCE & SAFETY INSTRUCTIONS
Monthly, check the opener's down cycle safety reverse. The door must reverse when it
contacts a 1 1/2" (38) high object (or a 2X4 board laid flat) on the floor, in line with the door
opener. A closing door must also reverse if the photo eyes are interrupted. See Steps 12,13.
Always keep the moving door in sight and away from people and objects until it is
completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR.
Do not allow children to operate or play with the garage door controls. Keep the remote
control away from children.
If the Safety Reverse or any other part of the garage door and opener system do not work
properly, or if you do not understand, call a trained Martin Door Dealer.
TO REDUCE THE RISK OF SEVERE INJURY OR
DEATH, READ AND FOLLOW ALL INSTRUCTIONS
TO REDUCE THE RISK OF SEVERE INJURY OR
DEATH, READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE IMPORTANT INSTRUCTIONSSAVE THESE IMPORTANT INSTRUCTIONS
The emergency release should only be used when garage door is in the closed position.
Weak or broken springs may cause door to fall, if released in the open position, increasing
the risk of severe injury or death. Use caution when using the release with door open.
Monthly visually check lift cables, spring assembly, hardware, etc. for wear and stability.
KEEP GARAGE DOOR PROPERLY BALANCED. See garage door owner’s manual. An
improperly balanced door increases the risk of severe injury or death. Call a trained Martin
Door Dealer to repair lift cables, spring assemblies and other hardware.

16
STEP 13
STEP 12
TEST DOWN FORCE REVERSAL
Place a 1 1/2”(38) high object (or a 2X4 laid flat) on the floor, in
line with the door opener. When the closing door contacts the
object, it should stop, reverse, and automatically return to the
open position. If the door does not reverse, reset the down travel
limit so that the door travels slightly further down in the closed
direction. Then, retest the unit as described above. See Figure 32
NOTE: Rail assembly may require center support to ceiling.
WARNING! If the door does not reverse, disconnect your
opener and call a trained Martin Door Dealer.
TEST DOWN CYCLE PHOTO EYES REVERSAL
Photo eyes must be clean and properly aligned. Loosen wing nuts
to rotate photo eyes vertically or horizontally for correct alignment.
See Figure 33.
The green light on the transmitter photo eye and the red light on the
receiver photo eye must illuminate or the door will not close.
See Figure 34
Start the door in the downward direction. Interrupt the invisible beam by waving a
solid object between the photo eyes. The Door Must Reverse! See Figure 35
Faulty photo eyes can be bypassed with constant pressure on a wall control/push
button or transmitter button.
NOTE: To test the Up Force, place an object to stop the door in its upward direction.
The opener should stop when the door contacts the object. The Martin
Opener also has a third reversal protection system, which automatically
opens the door in 30 seconds if Opener Reversal System fails or if the door
is unable to completely close in 30 seconds time.
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COPYRIGHT © 2002 MARTIN DOOR
FIGURE 32
FIGURE 33
FIGURE 34
FIGURE 35
STEP 14
APPLY LABELS TO INSIDE OF GARAGE
TM
Martin Finger Shield Garage Door and Opener Systems include a maintenance and
warning label on a packet fastened to the backside of the #3 door section. Inside the
packet are the owners garage door and opener instruction manuals. See Figure 32
Important safety and instruction labels are included with your opener package. These
labels and the Instruction Manual must be fastened inside your garage where they can
be easily seen by all. We recommend fastening them next to the wall control. To fasten
labels, peel off the protective backing, and press onto smooth, clean surface. Tacks or
additional adhesive may be necessary. DO NOT PAINT OVER ANY LABELS.
See Figure 32
MARTIN
!!
8/2001AD-01IM-03
INSTRUCTION
MANUAL
MARTIN DC3700 GARAGE DOOR OPENER SYSTEM
TM
DOOROPENERS
ARTI
N
M
ForallResidentialGarage Doors up to 12’ (3700) High.
MA TIN FINGER S I LD GARAGE DO R AND OP N R SSEMR HEO E E Y T
N TRUCTI N MANUALS AND WARNING LABEL
I S O
(FACTORY PACKAGED AND MOUN )
TED
GARG O O N
AED OR PE ER
IN RUCT N MANA LST IO U
AD WARI NG LABELS
N N
1 1/2”(38) HIGH OBJECT
FOR DOOR REVERSAL TEST
HORIZONTAL ROTATION
PATH MUST BE CLEAR BETWEEN PHOTO EYES
VERTICAL ROTATION
INVISAILE BEAM
TRANSMITTER
GREEN LIGHT ON
RECEIVER
RED LIGHT ON
TRANSMITTER
GREEN LIGHT ON
SOLID
OBJECT
BETWEEN
PHOTO
EYES
RECEIVER
RED LIGHT OFF
WALL CONTROL
OR PUSH BUTTON

19
COPYRIGHT © 2002 MARTIN DOOR
FIGURE 44
STEP 17
R
STEP 18
BELT OR CHAIN AIL ASSEMBLY TENSION ADJUSTMENT
Your pre-assembled Belt or Chain Assembly comes from the factory with the tension
adjusted to factory specifications. There should be no need for adjustment.
CHECKING TENSION:
Release trolley from belt or chain connector. The tension nut/washer should be spaced
approximately 1/16" (1.5) from the stationary end-stop arch at the
header end of the rail assembly. See Figure 45
ADJUST THE TENSION:
Increase tension by tightening tension nut clockwise.
Decrease tension by loosening tension nut
counterclockwise.
TO SHORTEN BELT OR CHAIN RAIL ASSEMBLY UP TO 24” (610):
(See exploded view of rail assemblies on Page 21)
Note: For trained Martin Garage Door Dealers: Consult factory if cut-off is more than 24”
(610) because the position tab must be kept in the proper location.
Loosen belt or chain tension as much as possible.
Remove screws from sprocket holder and rail end-stop.
Slide belt or chain and all rail assembly parts out of rail assembly from header end.
Measure and cut off excess rail assembly (1” (25) increments only) from header end.
Disassemble connector assembly to expose free ends of belt or chain.
Use the same measurement as the excess rail assembly length and cut the same
amount off both free ends of the belt or chain.
Use rail assembly end-stop as a guide, mark and drill two 3/16" holes on rail
assembly sides for rail assembly end-stop screws.
Fasten both ends of the belt ribs or the chain links to the connector assembly.
Slide all rail assembly parts into rail assembly from header end according to
original assembly.
Tension the belt or chain following STEP 17.
FIGURE 45
HEADER END OF RAIL ASSEMBLY BELT OR CHAIN
(BELT SHOWN)
THTE HI O
IG N T S DIRECTI N
RAIL END-STOP
WRENCH
VIEW FROM BELOW
IMPROPER TENSION - TOO LOOSE
PROPER TENSION
RAIL END-STOP
RAIL END-STOP
RAIL ASSEMBLY
RAIL ASSEMBLY
TENSION NUT
AND WASHER
TOO MUCH
SPACE
STATIONARY
END-STOP
TENSION NUT
AND WASHER
CORRECT
SPACE IS 1/16”(1.5)
STATIONARY
END-STOP
HEADER END
HEADER END