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LiftMaster 3255 Support Question

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Question posted by omalleyp2883 on June 18th, 2013

Replacing The La400 Battery-what's The Difference Between 29-np712 Vs K74-30762?

I'm looking to replace the batteries on my LA400 LiftMaster, but I'm not sure which batteries to get. What's the difference between these? 29-NP712 vs K74-30762

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Related LiftMaster 3255 Manual Pages

3255 Manual - Page 1

® GARAGE DOOR OPENER Models 3245 1/3 HP 3255 1/2 HP 3255-2 1/2 HP For Residential Use Only The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com Owner'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...

3255 Manual - Page 2

... Word on the following pages, it will alert you to the possibility of serious injury or death if you to the possibility of your garage door opener 28 Having a problem 29 Diagnostic chart 30 Programming 31-32 To add or reprogram a hand-held remote control 31 To erase all codes 31 3-Button remotes 31...

3255 Manual - Page 3

... to garage door and opener: • ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid entanglement. To prevent possible SERIOUS INJURY OR DEATH: • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. Raise and lower the door to make sure your garage door is...

3255 Manual - Page 4

... 12. Header Wall FINISHED CEILING Support bracket & fastening hardware is required. See page 19 for lightweight garage doors (fiberglass, steel, aluminum, door with the installation of door must not exceed 1/4" (6 mm). Slack in chain tension is normal when garage door is closed . Reversing Sensor 4 Safety Reversing Sensor Safety Gap between floor and bottom of your installation...

3255 Manual - Page 5

Carton Inventory Your garage door opener is packaged in the foam. Trolley One-Piece Rail Curved Door Arm Section Chain Pulley Bracket Door Bracket Safety Sensor Bracket (2)...purchased. contain the motor unit and all parts illustrated below . 3245 (1), 3255 (1), 3255-2 (2) LOCK LIGHT Multi-Function Door Control Panel : SECURITY ® Single-Button Remote Control Remote Control Visor ...

3255 Manual - Page 6

...tab in the slot on the trolley to fingers from moving garage door opener: • ALWAYS keep hand clear of sprocket while operating opener. • Securely attach sprocket cover BEFORE operating. Use ...STEP 1 Attach the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted in top of ...

3255 Manual - Page 7

... direction shown (Figure 1). Trolley Figure 2 Sprocket noise can result if chain is normal. An improperly balanced door may notice loosening of SEVERE INJURY or DEATH: 1. Install garage door opener 7 feet (2.13 m) or more above floor. 7. NEVER connect garage door opener to power source until instructed to the installation section. NEVER wear watches, rings or loose clothing while...

3255 Manual - Page 8

... mark the inside vertical centerline of Travel Pivot One-piece door without track: jamb hardware One-piece door without track. An unbalanced garage door might not reverse when required. or you need to install the header bracket on a 2x4 (on page 9. 3. Open your door to garage door types. Extend the line onto the header wall above the high...

3255 Manual - Page 9

... bracket. Make sure the arrow is for ceiling mount). Wall Mounting Holes CEILING MOUNT ONLY UP The nail hole is minimal. • Mark the side holes. Optional Wall Mounting Holes Header Wall 2x4 Structural Support Header Bracket CEILING MOUNT ONLY UP Vertical Centerline of Garage Door Lag Screws 5/16"-9x1-5/8" Door Spring Horizontal Line...

3255 Manual - Page 10

...'ll need help. Garage Door Ring Fastener Rail Header Bracket Clevis Pin 5/16"x2-3/4" Chain Pulley Bracket Rail Temporary Support HARDWARE SHOWN ACTUAL SIZE Clevis Pin 5/16"x2-3/4" 10 Ring Fastener Header Wall Header Bracket Chain Pulley Bracket INSTALLATION STEP 3 Attach the Rail to the Header Bracket • Position the opener on a temporary...

3255 Manual - Page 12

... anchors MUST be different. INSTALLATION STEP 5 Hang the Opener Three representative installations ...door (or in the structural supports. 4. Measure the distance from a falling garage door opener, fasten it SECURELY to structural supports of the hanging bracket to make sure the rail is not centered above the door). 7. Fasten the opener to provide rigid support. If the door...

3255 Manual - Page 13

...Replace Insert Bottom Tabs First LOCK LIGHT To Replace Insert Bottom Tabs First 24 Volt Bell Wire Figure 3 MULTI-FUNCTION Figure 4 REMOVE COVER DOOR..., creating a short or open position but will travel . • ALWAYS keep garage door in tab with a small...sure power is not mounted on page 16. If a click is connected and properly aligned. NOTE: When connecting multiple door...

3255 Manual - Page 14

The light will turn ON and remain lit for replacement. To prevent possible OVERHEATING of the endpanel or light socket: • DO ... Then the lights will turn OFF. • Reverse the procedure to close the lens. • Use A19, standard neck garage door opener bulbs for approximately 4-1/2 minutes when power is 6 feet (1.83 m) above the floor. INSTALLATION STEP 7 Install the Light &#...

3255 Manual - Page 28

... subject to be sure door opens and closes fully. Twice a Year • Check chain tension. Adjust if necessary (see pages 23 and 24). • Repeat the safety reverse test. Once a Year • Oil door rollers, bearings and hinges. Operation is required. If it is swallowed, immediately notify doctor. THE REMOTE CONTROL BATTERY To prevent possible...

3255 Manual - Page 29

...and DOWN Travel Limits. My remotes will not turn off when door is open: • The garage door opener is against the stop . My door reverses for no apparent reason after fully closing and touching the...nut so the chain is a 1/2" (13 mm) above . 29 Refer to a closed , the chain will still not activate your Door Control is reconnected and closed position. • Loosen the chain ...

3255 Manual - Page 30

... Diagnostics Located On Motor Unit Safety Reversing Sensor LED or Diagnostic LED "Learn" Button Diagnostic Chart Installed Safety Reversing Sensor Your garage door opener is stuck on the safety sensors do not light, replace the safety sensors. Try to reset. Wait 30 minutes and retry. Symptom: Motor has over heated; RPM Sensor = Short travel...

3255 Manual - Page 33

... control 3 10A20 3V2032 Lithium battery 4 29B137 Remote control visor clip 5 41A2828 Emergency release rope and handle assembly 6 41B4494-1 2-Conductor bell wire, white and white/red 7 41A4353 Header bracket with clevis pin and fastener 8 41A5047 Door bracket with clevis pin and fastener 9 178B35 Curved door arm section 10 178B34 Straight door arm section 11 41A5034...

3255 Manual - Page 34

... panel with all labels Light socket Lens Capacitor - 1/2 HP Capacitor - 1/3 HP Capacitor bracket Terminal block with screws Universal replacement motor and bracket assembly Complete with all labels NOT SHOWN Motor shaft bearing kit Opener assembly hardware kit (includes screws not designated by a number in illustration) 34 End panel with all labels Low...

3255 Manual - Page 35

...;® 4-Button Remote Control: Includes visor clip. Laser Park Assist: Laser enables homeowners to protect LiftMaster® garage door openers against damage from lightning and power surges. 35 Surge Protector: The Garage Door Opener Surge Protector is open garage door manually from outside by disengaging trolley. 373P Extension Brackets: (Optional) For safety sensor installation onto...

3255 Manual - Page 36

...GARAGE DOOR OR GARAGE DOOR HARDWARE, INCLUDING BUT NOT LIMITED TO THE DOOR SPRINGS, DOOR ROLLERS, DOOR ALIGNMENT OR HINGES. SIMPLY DIAL OUR TOLL FREE NUMBER: 1-800-528-9131 www.liftmaster...CHARGES FOR REINSTALLING A REPAIRED OR REPLACED UNIT, REPLACEMENT OF BATTERIES AND LIGHT BULBS OR UNITS ... COST OF THE PRODUCT COVERED HEREBY. Look for warranty repair. If, during the...