background image

9

INSTALLATION STEP 2

Install the Header Bracket

You can attach the header bracket either to the wall
above the garage door, or to the ceiling. Follow the
instructions which will work best for your particular
requirements. 

Do not install the header bracket

over drywall. If installing into masonry, use
concrete anchors (not provided).

WALL HEADER BRACKET INSTALLATION

• Center the bracket on the vertical centerline with

the bottom edge of the bracket on the horizontal
line as shown (with the arrow pointing toward the
ceiling). 

• Mark the vertical set of bracket holes (do not use

the holes designated for ceiling mount). Drill 3/16"
pilot holes and fasten the bracket securely to a
structural support with the hardware provided.

Lag Screw
5/16"-9x1-5/8"

HARDWARE SHOWN ACTUAL SIZE

Lag Scre

w

s

5/16"x9x1-5/

8

"

Highest Point of 
Garage Door Tra

v

el

Vertical
Centerline of
Garage Door

Header

W

all

Garage
Door

UP

CEILI

N

G MOU

N

T O

N

LY

W

all Mo

u

nting Holes

Optional 

W

all Mo

u

nting Holes

The nail hole is for
positioning only. 
Yo

u

 m

u

st 

u

se lag scre

w

to mo

u

nt the header 

b

racket.

UP

CE

ILI

N

G M

OU

N

T O

N

LY

Door Spring

Header

Bracket

2x4
Str

u

ct

u

ral

S

u

pport

Vertical
Centerline of
Garage Door

Horizontal
Line

UP

CEILI

N

G MOU

N

T O

N

LY

Ceiling Mo

u

nting Holes

The nail hole is for 
positioning only.
Yo

u

 m

u

st 

u

se lag scre

w

to mo

u

nt the header 

b

racket.

UP

Lag Scre

w

s

5/16"-9x1-5/

8

"

Garage Door

Vertical
Centerline
of Garage Door

Header 

W

all

– Finished Ceilin

g

 –

Header

Bracket

6" (15 cm) 
Maxim

u

m

Vertical
Centerline
of Garage Door

Door
Spring

CEILING HEADER BRACKET INSTALLATION

• Extend the vertical centerline onto the ceiling as

shown.

• Center the bracket on the vertical mark, no more

than 6"(15 cm) from the wall. Make sure the arrow
is pointing toward the wall. The bracket can be
mounted flush against the ceiling when clearance
is minimal.

• Mark the side holes. Drill 3/16" pilot holes and

fasten bracket securely to a structural support with
the hardware provided.

Summary of Contents for LiftMaster Professional 1255-2R

Page 1: ...er s Manual Please read this manual and the enclosed safety materials carefully Fasten the manual near the garage door after installation The door WILL NOT CLOSE unless the Protector System is connect...

Page 2: ...c chart 30 Programming 31 32 To add or reprogram a hand held remote control 31 To erase all codes 31 3 Button remotes 31 To add reprogram or change a Keyless Entry PIN 32 Repair Parts 33 34 Rail assem...

Page 3: ...your garage door Before you begin Disable locks Remove any ropes connected to garage door Complete the following test to make sure your garage door is balanced and is not sticking or binding 1 Lift t...

Page 4: ...u proceed with the installation of your opener Access Door Safety Reversing Sensor Safety Reversing Sensor Slack in chain tension is normal when garage door is closed Gap between floor and bottom of d...

Page 5: ...Visor Clip Door Bracket Door Control Button Motor Unit with Light lens 2 Safety Reversing Sensors 1 Sending Eye and 1 Receiving Eye with 2 Conductor White White Black Bell Wire attached Safety Sensor...

Page 6: ...obtain more chain slack Insert the second washered bolt CAUTION Use only the bolt previously removed from motor unit Tighten both bolts securely through the rail into the motor unit as shown Install...

Page 7: ...uce the risk of SEVERE INJURY or DEATH WARNING WARNING WARNING 1 READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS 2 Install garage door opener only on properly balanced and lubricated garage...

Page 8: ...the door NOTE If the total number of inches exceeds the height available in your garage use the maximum height possible or refer to page 9 for ceiling installation To prevent possible SERIOUS INJURY...

Page 9: ...age Door Header Wall Garage Door UP CEILING MOUNT ONLY Wall Mounting Holes Optional Wall Mounting Holes The nail hole is for positioning only You must use lag screws to mount the header bracket UP CEI...

Page 10: ...er Bracket Position the opener on the garage floor below the header bracket Use packing material as a protective base NOTE If the door spring is in the way you ll need help Have someone hold the opene...

Page 11: ...N STEP 4 Position the Opener Follow instructions which apply to your door type as illustrated SECTIONAL DOOR OR ONE PIECE DOOR WITH TRACK A 2x4 laid flat is convenient for setting an ideal door to rai...

Page 12: ...the motor unit to 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...

Page 13: ...wo screw terminals on the back of the door control by color white wire to 2 and white red wire to 1 2 Fasten the Lighted Door Control Button securely with 6ABx1 1 2 screws If installing into drywall d...

Page 14: ...vent 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...

Page 15: ...he 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...

Page 16: ...r 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 g...

Page 17: ...p 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 Figure 2 3 Place the bracket again...

Page 18: ...ructed 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 s...

Page 19: ...ollows 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 doo...

Page 20: ...INUM STEEL DOORS WITH GLASS PANEL ETC NOT PROVIDED ONE PIECE DOORS Please read and comply with the warnings and reinforcement instructions on the previous page They apply to one piece doors also Cente...

Page 21: ...re 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 Brin...

Page 22: ...hers 5 16 Ring Fastener Straight Arm Bolts 5 16 18x7 8 Door Bracket Clevis Pin 5 16 x1 1 4 Curved Door Arm Press the Door Control push button The trolley will travel to the fully closed position Manua...

Page 23: ...ined in Adjustment Step 2 If the door does not close completely Increase down travel Turn the down limit adjustment screw counterclockwise One turn equals 2 5 cm of travel If door still won t close co...

Page 24: ...small adjustments until the door completes a close cycle After each adjustment run the opener through a complete travel cycle Do not increase the force beyond the minimum amount required to close the...

Page 25: ...un the opener through 3 or 4 complete travel cycles to test adjustment If the unit continues to fail the Safety Reverse Test call for a trained door systems technician IMPORTANT SAFETY CHECK Test the...

Page 26: ...on under the following conditions when the opener is initially plugged in when power is restored after interruption when the opener is activated The light will also turn on when someone walks through...

Page 27: ...ible 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 re...

Page 28: ...ved including interference that may cause undesired operation MAINTENANCE SCHEDULE Once a Month Manually operate door If it is unbalanced or binding call a trained door systems technician Check to be...

Page 29: ...ustments to force or travel limits The need for occasional adjustment for the force and limit settings is normal Weather conditions in particular can affect door travel Refer to Adjustment Step 1 Adju...

Page 30: ...r control touch wires together If motor unit activates replace door control If motor unit does not activate disconnect door control wires from motor unit Momentarily short across red and white termina...

Page 31: ...h to operate your garage door 3 Release the button when the motor unit lights blink It has learned the code If light bulbs are not installed two clicks will be heard To Add or Reprogram a Hand held Re...

Page 32: ...ary PIN You may authorize access by visitors or service people with a temporary 4 digit PIN After a programmed number of hours or number of accesses this temporary PIN expires and will no longer open...

Page 33: ...l 3 10A20 3V2032 Lithium battery 4 29B137 Transmitter visor clip 5 41A2828 Emergency release rope handle assembly 6 41B4494 1 2 conductor bell wire white white red 7 41A4353 Header bracket w clevis pi...

Page 34: ...ket 7 108D36 Lens 8 30B532 Capacitor 1 2HP 9 12A373 Capacitor bracket 10 41A3150 Terminal block w screws KEY PART NO NO DESCRIPTION 11 41D3058 Universal replacement motor bracket assy Complete with Mo...

Page 35: ...ensor installation onto the wall or floor 973W Wireless Keyless Entry with Security Enables homeowner to operate garage door opener from outside by entering a password on a specially designed keyboard...

Page 36: ...nty repair You will be advised of shipping instructions when you call Please include a brief description of the problem and a dated proof of purchase receipt with any product returned for warranty rep...

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