Craftsman Garage Door Opener 34 Manual

							11
INSTALLATION STEP 5
Hang the Opener
Three representative installations are shown. Yours may
be different. Hanging brackets should be angled (Figure 1)
to provide rigid support. On finished ceilings (Figure 2 and
Figure 3), attach a sturdy metal bracket to structural
supports before installing the opener. This bracket and
fastening hardware are not provided.
1. Measure the distance from each side of the motor unitto the structural support.
2. Cut both pieces of the hanging bracket to required lengths.
3. Drill 3/16 pilot holes in the structural supports.
4. Attach one end of each bracket to a support with  5/16-18x1-7/8 lag screws.
5. Fasten the opener to the hanging brackets with  5/16-18x7/8 hex bolts, lock washers and nuts.
6. Check to make sure the rail is centered over the door (or in line with the header bracket if the bracket is not
centered above the door).
7. Remove the 2x4. Operate the door manually. If the door hits the rail, raise the header bracket.
8. Grease the top and underside of the rail surface where the trolley slides with rail grease.
NOTE: DO NOT connect power to opener at this time.
To avoid possible SERIOUS INJURY from a falling garage door
opener, fasten it SECURELY to structural supports of the
garage. Concrete anchors MUST be used if installing any
brackets into masonry.
Measure
Distance Lag Screws
5/16-18x1-7/8
Structural
Supports
Bracket
(Not Provided)
Lag Screws
5/16-18x1-7/8
(Not Provided)
Bolt 5/16-18x7/8 
Lock Washer 5/16 
Nut 5/16-18 FINISHED CEILING
Hidden 
Support
Bolt 5/16-18x7/8 
Lock Washer 5/16 
Nut 5/16-18 
Bolt 5/16-18x7/8 
Lock Washer 5/16 
Nut 5/16-18 
Lag Screws
5/16-18x1-7/8
(Not Provided)
Bolt 5/16-18x7/8 
Lock Washer 5/16 
Nut 5/16-18 FINISHED CEILING
Bolt 5/16-18x7/8 
Lock Washer 5/16 
Nut 5/16-18 
Figure 1
Figure 2
Figure 3
Lag Screw 5/16-18x1-7/8
Hex Bolt
5/16-18x7/8
Nut 5/16-18Lock Washer 5/16
HARDWARE SHOWN ACTUAL SIZE 
						

							12
INSTALLATION STEP 6
Install the Door Control
Locate door control within sight of door, at a minimum
height of 5 (1.5 m) where small children cannot reach,
away from moving parts of door and door hardware. If
installing into drywall, drill 5/32 holes and use the anchors
provided. For pre-wired installations (as in new home
construction), it may be mounted to a single gang box
(Figure 1).
NOTE:The functional temperature range of the door
control is between -4° F (-20° C) and 122° F (50° C).
Scroll speed of display is slower at lower temperatures
although the door control remains fully functional.
CAUTION: Continuous exposure of the door control to
temperatures below -22° F (-30° C) may damage the LCD
screen.
SPECIAL NOTE: Only one 398LM can be connected to
each garage door opener. If additional wall controls are
desired to operate the same garage door opener, it is
recommended to use model 378LM wireless wall control
as the secondary door control.
1. Strip 7/16 (11 mm) of insulation from one end of bell wire and connect to the two screw terminals on back of
door control by color: white wire to the W (2) and
white/red wire to the R (1) (Figure 2).
2. Remove push bar cover by gently prying at the lower/middle portion of the cover with a small flat-head
screwdriver. Fasten with 6AB x 1-1/4 self-tapping
screws (drywall installation) or 6-32 x 1 machine
screws (into gang box) as follows:
above wall surface.
 slide down to secure. Adjust screw for snug fit.
 plastic housing. Do NOT overtighten.
 cover in place.
3. (For standard installations ONLY) Run bell wire up
wall and across ceiling to motor unit. Use insulated
staples to secure wire in several places. Do NOT pierce
wire with a staple, creating a short or open circuit.
4. Strip 7/16 (11 mm) of insulation from end of bell wire. Connect bell wire to the quick-connect terminals on the
motor unit: white to white and white/red to red
(Figure 2).
NOTE: If you have any trouble with the operation of the
buttons, loosen the top mounting screw. DO NOT connect
power and operate the opener at this time.The trolley will
travel to the full open position but will not return to the
close position until the sensor beam is connected and
properly aligned.
To prevent possible SERIOUS INJURY or DEATH from
electrocution:
• Be sure power is not connected BEFORE installing door control.
• Connect ONLY to 24 VOLT low voltage wires. 
To prevent possible SERIOUS INJURY or DEATH from a closing
garage door:
• Install door control within sight of garage door, out of reach of children at a minimum height of 5 feet (1.5 m) and away
from ALL moving parts of door.
• NEVER permit children to operate or play with door control push buttons or remote control transmitters.
• Activate door ONLY when it can be seen clearly, is properly adjusted and there are no obstructions to door travel.
• ALWAYS keep garage door in sight until completely closed. NEVER permit anyone to cross path of closing garage door.
Drywall Anchors
Insulated
Staples 
Screw 6ABx1-1/4
(standard installation)
Screw 6-32x1 
(pre-wired)
HARDWARE SHOWN ACTUAL SIZE
PRE-WIRED INSTALLATION
REMOVE & REPLACE COVER
To Replace Insert 
Top Tabs First
Push Bar Cover
24 Volt Bell WireLOCKLIGHT
LOCKLIGHT
Figure 1
Strip wire 7/167/16 (11 mm)
Red Grey White
Quick-Connect
Terminals
Antenna 
To release or insert wire,
push in tab with
screwdriver tip
Door Control
Connections
Push Bar
Light 
Button
Lock
Button
Door
Control
Terminal
Screws
(BACK VIEW)
W
2
R
1
2-Conductor
Bell Wire
LOCK LOCK
Figure 2 
						

							Trolley
NOTICE
Overhand
Knot
Emergency
Release Handle
Rope
Trolley
Release Arm
13
INSTALLATION STEP 7
Install the Light 
 Press the release tabs on both sides of lens. Gently
rotate lens back and downward until the lens hinge is in
the fully open position. Do not remove the lens.
 Install up to a 100 watt maximum light bulb in each socket. Light bulb size should be A19, standard neck
only. The light will turn ON and remain lit for
approximately 4-1/2 minutes when power is connected.
Then the lights will turn OFF.
 Reverse the procedure to close the lens.
 Use A19, standard neck garage door opener bulbs for replacement.
NOTE: Use only standard light bulbs. The use of short
neck or speciality light bulbs may overheat the endpanel
or light socket.
INSTALLATION STEP 8
Attach the Emergency Release Rope
and Handle
 Thread one end of the rope through the hole in the top of the red handle so NOTICE reads right side up as
shown. Secure with an overhand knot at least 1 
(25 mm) from the end of the rope to prevent slipping.
 Thread the other end of the rope through the hole in the release arm of the outer trolley.
 Adjust rope length so the handle is 6 feet (1.82 m) above the floor. Secure with an overhand knot.
NOTE: If it is necessary to cut the rope, heat seal the cut
end with a match or lighter to prevent unraveling.
Lens
Hinge
100 Watt (Max)
Standard Light Bulb
Release Tab
100 Watt (Max)
Standard Light Bulb
To prevent possible SERIOUS INJURY or DEATH from a falling
garage door:
• If possible, use emergency release handle to disengage trolley ONLY when garage 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 garage doorway is clear of persons and obstructions.
• NEVER use handle to pull door open or closed. If rope knot becomes untied, you could fall.
To prevent possible OVERHEATING of the endpanel or light
socket:
• DO NOT use short neck or specialty light bulbs.
• DO NOT use halogen bulbs. Use ONLY incandescent.
To prevent damage to the opener:
• DO NOT use bulbs larger than 100W.
• ONLY use A19 size bulbs. 
						

							14
INSTALLATION STEP 9
Electrical Requirements
To avoid installation difficulties, do not run the opener
at this time.
To reduce the risk of electric shock, your garage door
opener has a grounding type plug with a third grounding
pin. This plug will only fit into a grounding type outlet. If
the plug doesn’t fit into the outlet you have, contact a
qualified electrician to install the proper outlet.
If permanent wiring is required by your local code,
refer to the following procedure.
To make a permanent connection through the 7/8 hole in
the top of the motor unit:
 Remove the motor unit cover screws and set the coveraside.
 Remove the attached 3-prong cord.
 Connect the black (line) wire to the screw on the brass terminal; the white (neutral) wire to the screw on the
silver terminal; and the ground wire to the green ground
screw.  The opener must be grounded.
 Reinstall the cover.
To avoid installation difficulties, do not run the opener
at this time.
RIGHT WRONG
To prevent possible SERIOUS INJURY or DEATH from
electrocution or fire:
• Be sure power is not connected to the opener, and
disconnect power to circuit BEFORE removing cover to
establish permanent wiring connection.
• Garage door installation and wiring MUST be in compliance with all local electrical and building codes.
• NEVER use an extension cord, 2-wire adapter, or change plug in ANY way to make it fit outlet. Be sure the opener is
grounded.
Ground Tab
Green 
Ground Screw
Ground Wire
Black Wire
PERMANENT WIRING
CONNECTION
White Wire
Black
Wire 
						

							15
Invisible Light Beam
Protection Area
Safety Reversing Sensor
6 (15 cm) max. above floorSafety Reversing Sensor
6 (15 cm) max. above floor
INSTALLATION STEP 10
Install The Protector System®
The safety reversing sensor must be connected and
aligned correctly before the garage door opener will
move in the down direction.
IMPORTANT INFORMATION ABOUT 
THE SAFETY REVERSING SENSOR
When properly connected and aligned, the sensor will
detect an obstacle in the path of its electronic beam. The
sending eye (with an amber indicator light) transmits an
invisible light beam to the receiving eye (with a green
indicator light). If an obstruction breaks the light beam
while the door is closing, the door will stop and reverse to
full open position, and the opener lights will flash 10 times.
The units must be installed inside the garage so that the
sending and receiving eyes face each other across the
door, no more than 6 (15 cm) above the floor. Either can
be installed on the left or right of the door as long as the
sun never shines directly into the receiving eye lens.
The mounting brackets are designed to clip onto the track
of sectional garage doors without additional hardware.
If it is necessary to mount the units on the wall, the
brackets must be securely fastened to a solid surface
such as the wall framing. Extension brackets (see
accessories) are available if needed. If installing in
masonry construction, add a piece of wood at each
location to avoid drilling extra holes in masonry if
repositioning is necessary.
The invisible light beam path must be unobstructed. No
part of the garage door (or door tracks, springs, hinges,
rollers or other hardware) may interrupt the beam while
the door is closing.
Be sure power is not connected to the garage door opener
BEFORE installing the safety reversing sensor.
To prevent SERIOUS INJURY or DEATH from a closing garage
door:
• Correctly connect and align the safety reversing sensor. This
required safety device MUST NOT be disabled.
• Install the safety reversing sensor so beam is NO HIGHER than 6" (15 cm) above garage floor. 
						

							16
FLOOR MOUNT (RIGHT SIDE)WALL MOUNT (RIGHT SIDE)
DOOR TRACK MOUNT (RIGHT SIDE)
Indicator
 light
Lens
Lip 
Sensor
Bracket Door
Track
Sensor
Bracket
Extension
Bracket
LensIndicator
 light
Lag Screw
1/4x1-1/2
Inside
Garage
Wall
Indicator
light Sensor
Bracket
Lens
Extension
Bracket
Inside
Garage
W all
Lock Nut
1/4-20 Lock Nut
1/4-20
Hex Bolt
1/4-20x5/8 
Hex Bolt
1/4-20x5/8 
Lag Screw
1/4x1-1/2
Figure 3
Figure 1
Figure 2
INSTALLING THE  BRACKETS
Be sure power to the opener is disconnected. Install
and align the brackets so the sensors will face each other
across the garage door, with the beam no higher than 
6 (15 cm) above the floor. They may be installed in one of
three ways, as follows:
Garage door track installation (preferred):
 Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. Snap
into place against the side of the track. It should lie
flush, with the lip hugging the back edge of the track, as
shown in Figure 1.
If your door track will not support the bracket securely, wall
installation is recommended.
Wall installation:
 Place the bracket against the wall with curved arms facing the door. Be sure there is enough clearance for
the sensor beam to be unobstructed. 
 If additional depth is needed, an extension bracket  or wood blocks can be used.
 Use bracket mounting holes as a template to locate and drill (2) 3/16 diameter pilot holes on the wall at each
side of the door, no higher than 6 (15 cm) above the
floor. 
 Attach brackets to wall with lag screws.
 If using extension brackets or wood blocks, adjust right and left assemblies to the same distance out from the
mounting surface. Make sure all door hardware
obstructions are cleared.
Floor installation:
 Use wood blocks or extension brackets to elevate sensor brackets so the lenses will be no higher than 
6 (15 cm) above the floor.
 Carefully measure and place right and left assemblies at the same distance out from the wall. Be sure all door
hardware obstructions are cleared.
 Fasten to the floor with concrete anchors as shown.
Lag Screw
1/4x1-1/2 (4)Lock Nut 
1/4-20 (2)Hex Bolt 
1/4-20x5/8 (2)Wing Nut
1/4-20Staples
Carriage Bolt
1/4-20x1/2 
HARDWARE SHOWN ACTUAL SIZE 
						

							Invisible Light Beam
Protection AreaSafety Reversing Sensor
Safety Reversing Sensor
Connect Wire to
Opener Quick-Connect Terminals
Bell Wire
Bell Wire
Finished
Ceiling
Quick-Connect Terminals3.  Insert into 
     appropriate terminals
1.  Strip wire 7/16 
      (11 mm)
2.  Twist like colored 
     wires together7/16
(11mm)
Red
Grey
White
17
Carriage Bolt 
1/4-20x1/2
Lens
Wing Nut
1/4-20
Figure 4MOUNTING AND WIRING THE SAFETY REVERSING
SENSORS
 Slide a 1/4-20x1/2 carriage bolt head into the slot on
each sensor. Use wing nuts to fasten sensors to
brackets, with lenses pointing toward each other across
the door. Be sure the lens is not obstructed by a bracket
extension (Figure 4).
 Finger tighten the wing nuts. 
• Run the wires from both sensors to the opener. Use
insulated staples to secure wire to wall and ceiling. 
 Strip 7/16 (11 mm) of insulation from each set of wires. Separate white and white/black wires sufficiently to
connect to the opener quick-connect terminals. Twist like
colored wires together. Insert wires into quick-connect
holes: white to white and white/black to grey (Figure 5).
ALIGNING THE SAFETY REVERSING SENSORS
• Plug in the opener. The indicator lights in both the
sending and receiving eyes will glow steadily if wiring
connections and alignment are correct.
The  sending  eye amber indicator light will glow regardless
of alignment or obstruction. If the green indicator light in
the  receiving eye is off, dim, or flickering (and the invisible
light beam path is not obstructed), alignment is required.
 Loosen the sending eye wing nut and readjust, aiming
directly at the receiving eye. Lock in place.
 Loosen the receiving eye wing nut and adjust sensor
until it receives the sender’s beam. When the green
indicator light glows steadily, tighten the wing nut.
TROUBLESHOOTING THE SAFETY REVERSING
SENSORS
1. If the sending eye indicator light does not glow steadily
after installation, check for:

 short in the white or white/black wires. These can occur at staples, or at opener connections.

 broken  wire.
2. If the sending eye indicator light glows steadily but the
receiving eye indicator light doesnt:

 receiving eye.
3. If the receiving eye indicator light is dim, realign either
sensor.
NOTE: When the invisible beam path is obstructed or
misaligned while the door is closing, the door will reverse.
If the door is already open, it will not close. The opener
lights will blink 10 times. (If bulbs are not installed, 10
clicks can be heard.) See page 15 .
Figure 5  
						

							18
Fiberglass, aluminum or lightweight steel garage doors WILL
REQUIRE reinforcement BEFORE installation of door bracket.
Contact your door manufacturer for reinforcement kit.
INSTALLATION STEP 11
Fasten the Door Bracket 
Follow instructions which apply to your door type as
illustrated below or on the following page.
A horizontal reinforcement brace should be long
enough to be secured to two or three vertical
supports. A vertical reinforcement brace should cover
the height of the top panel.
Figure 1 shows one piece of angle iron as the horizontal
brace. For the vertical brace, 2 pieces of angle iron are
used to create a U-shaped support. The best solution is to
check with your garage door manufacturer for an opener
installation door reinforcement kit.
NOTE: Many door reinforcement kits provide for direct
attachment of the clevis pin and door arm. In this case you
will not need the door bracket; proceed to Step 12.
SECTIONAL DOORS
1. Center the door bracket on the previously marked vertical centerline used for the header bracket
installation. Note correct UP placement, as stamped
inside the bracket.
2. Position the top edge of the bracket 2-4 (5-10 cm) below the top edge of the door, OR directly below any
structural support across the top of the door.
3. Mark, drill holes and install as follows, depending on your door’s construction:
Metal or light weight doors using a vertical angle iron
brace between the door panel support and the door
bracket:
 Drill 3/16 fastening holes. Secure the door bracket using the two 1/4-14x5/8 self-threading screws.
(Figure 2A)
 Alternately, use two 5/16 bolts, lock washers and nuts (not provided). (Figure 2B)
Metal, insulated or light weight factory reinforced
doors:
 Drill 3/16 fastening holes. Secure the door bracket using the self-threading screws. (Figure 3)
Wood Doors:
 Use top and bottom or side to side door bracket holes. Drill 5/16 holes through the door and secure bracket
with 5/16x2 carriage bolts, lock washers and nuts 
(not provided). (Figure 4)
NOTE: The 1/4-14x5/8 self-threading screws are not
intended for use on wood doors.
Vertical
Centerline
of Garage 
Door
Door
Bracket
Location
Header
Bracket
HORIZONTAL AND VERTICAL    
REINFORCEMENT IS NEEDED 
FOR LIGHTWEIGHT GARAGE 
DOORS (FIBERGLASS, 
ALUMINUM, STEEL, DOORS 
WITH GLASS PANEL, ETC.). 
(NOT PROVIDED)
Door
Bracket
Vertical
Centerline 
of Garage Door
UP
Vertical
Reinforcement
Self-Threading
Screw
1/4-14x5/8
Self-Threading
Screw
1/4-14x5/8
Door
Bracket Nut
5/16-18
Bolt
5/16-18x2
Lock  Washer
5/16
UP
Vertical
Reinforcement
(Not Provided)Vertical
Centerline 
of Garage Door
UP
Self-Threading
Screw
1/4-14x5/8
Vertical
Centerline 
of Garage Door
UP
Inside Edge
of Door or
Reinforcement Board
Bolt
5/16x2
(Not Provided)
Vertical
Centerline 
of Garage 
Door
Figure 1
Figure 2A
Figure 3
Figure 4
Figure 2B
HARDWARE
SHOWN
ACTUAL SIZE 
						

							19
INSTALLATION STEP 12
Connect Door Arm to Trolley
SECTIONAL DOORS ONLY
 Make sure garage door is fully closed. Pull theemergency release handle to disconnect the outer trolley
from the inner trolley. Slide the outer trolley back (away
from the door) about 2 (5 cm) as shown in Figures 1, 2
and 3.
• Figure 1: – Fasten straight door arm section to outer trolley withthe 5/16x1 clevis pin. Secure the connection with a
ring fastener.
– Fasten curved section to the door bracket in the same way, using the 5/16x1-1/4 clevis pin.
• Figure 2: – Bring arm sections together. Find two pairs of holesthat line up and join sections. Select holes as far apart
as possible to increase door arm rigidity.
• Figure 3, Hole alignment alternative: – If holes in curved arm are above holes in straight arm,disconnect straight arm. Cut about 6 (15 cm) from the
solid end. Reconnect to trolley with cut end down as
shown.
– Bring arm sections together.
– Find two pairs of holes that line up and join with bolts, lock washers and nuts.
 Proceed to Adjustment Step 1, page 20. Trolley will  re-engage automatically when opener is operated.
Ring 
Fastener
Door
Bracket Clevis Pin
5/16x1-1/4 Curved
Door ArmStraight
Door ArmClevis Pin
5/16x1
Inner Trolley
Outer Trolley
Lock
Washers
5/16
Nuts
5/16-18
Door Bracket Bolts
5/16-18x7/8Emergency
Release
Handle
Lock
Washers
5/16
Nuts
5/16-18
Bolts
5/16-18x7/8
Cut This End
Figure 1
Figure 2
Figure 3
Lock Washer 5/16Nut 5/16-18 Ring Fastener
Hex Bolt
5/16-18x7/8Clevis Pin
5/16x1 (Trolley)Clevis Pin
5/16x1-1/4 (Door Bracket)
HARDWARE SHOWN ACTUAL SIZE 
						

							20
ADJUSTMENT STEP 1
Adjust the UP and DOWN Travel Limits
Limit adjustment settings regulate the points at which the
door will stop when moving up or down.
To operate the opener, press the Door Control push bar.
Run the opener through a complete travel cycle.
 Does the door open and close completely?
 Does the door stay closed and not reverseunintentionally when fully closed?
If your door passes both of these tests, no limit
adjustments are necessary unless the reversing test fails
(Adjustment Step 3, page 22).
Adjustment procedures are outlined below. Read the
procedures carefully before proceeding to Adjustment Step
2. Use a screwdriver to make limit adjustments. Run the
opener through a complete travel cycle after each
adjustment.
NOTE: Repeated operation of the opener during
adjustment procedures may cause the motor to overheat
and shut off. Simply wait 15 minutes and try again.
NOTE: If anything interferes with the door’s upward travel,
it will stop. If anything interferes with the door’s downward
travel (including binding or unbalanced doors), it will
reverse.
HOW AND WHEN TO ADJUST THE LIMITS
• If the door does not open completely but opens at least five feet (1.5 m):
Increase up travel. Turn the UP limit adjustment screw
clockwise. One turn equals 3 (7.5 cm) of travel.
NOTE: To prevent the trolley from hitting the cover
protection bolt, keep a minimum distance of 2-4 
(5-10 cm) between the trolley and the bolt.
• If door does not open at least 5 feet (1.5 m): Adjust the UP (open) force as explained in Adjustment
Step 2.
• If the door does not close completely: Increase down travel. Turn the down limit adjustment
screw counterclockwise. One turn equals 3 (7.5 cm) of
travel.
If door still wont close completely and the trolley bumps
into the pulley bracket, try lengthening the door arm
(page 19) and decreasing the down limit.
• If the opener reverses in fully closed position: Decrease down travel. Turn the down limit adjustment
screw clockwise. One turn equals 3 (7.5 cm) of travel.
• If the door reverses when closing and there is novisible interference to travel cycle:
If the opener lights are flashing, the Safety Reversing
Sensors are either not installed, misaligned, or
obstructed. See Troubleshooting, page 17.
Test the door for binding: Pull the emergency release
handle. Manually open and close the door. If the door is
binding or unbalanced, call for a trained door systems
technician. If the door is balanced and not binding,
adjust the DOWN (close) force. See Adjustment Step 2.
ADJUSTMENT LABEL
Left Side Panel
Cover
Protection 
Bolt
2-4
(5-10 cm)
Limit Adjustment Screws
Without a properly installed safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• Incorrect adjustment of garage door travel limits willinterfere with proper operation of safety reversal system. 
• If one control (force or travel limits) is adjusted, the other control may also need adjustment.
• After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2"
high (3.8 cm) object (or 2x4 laid flat) on floor.
To prevent damage to vehicles, be sure fully open door
provides adequate clearance.