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Chamberlain 2575 - page 1
The Chamberlain Group, Inc. 845 Larch A ven ue Elmhurst, Illinois 60126-1196 www .liftmaster .com GARAGE DOOR OPENER Model 2575 3/4 HP For Residential Use Only ® Owner’s Manual ■ Please read this manual and the enc losed safety materials carefull y! ■ F asten the man ual near the garage door after installation. ■ The door WILL NO T CLOSE u ...
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Chamberlain 2575 - page 2
2 Introduction Pages 2-5 Saf ety symbol and signal word re view ........................2 Preparing your garage door ........................................3 T ools needed ...............................................................3 Planning .....................................................................4 Car ton inv entor y ............ ...
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Chamberlain 2575 - page 3
3 To prevent damage to garage door and opener: • AL WA YS disable locks before installing and operating the opener . • ONL Y operate garage door opener at 120V , 60 Hz to avoid malfunction and damage. To prevent possible SERIOUS INJURY OR DEA TH: • AL WA YS call a trained door systems technician if garage door binds, sticks, or is out of bala ...
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Chamberlain 2575 - page 4
Safety Reversing Sensor Support bracket & fastening hardware is required. See page 13. — — — — — — — — Door Center Header Wall FINISHED CEILING Torsion Spring Extension Spring OR Safety Reversing Sensor Gap between floor and bottom of door must not exceed 1/4" Access Door Wall- mounted Door Control Horizontal and vertical r ...
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Chamberlain 2575 - page 5
5 Straight Doo r Arm Section Curved Door Arm Section Safety Labels and Literature Header Bracket U P C E IL IN G MO U N T O N L Y 2 Conductor Bell Wire White & White/Red Light Lens (2) Remote Control Transmitter Visor Clip Door Bracket SECURITY ✚ 3-Channel Remote Control (2) Safety Reversing Sensors (1 Sending Eye and 1 Receiving Eye) with 2- ...
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Chamberlain 2575 - page 6
6 ASSEMBL Y STEP 1 Attach the T -Rail to the Motor Unit To av oid installation difficulties, do not run the garage door opener until instructed to do so. •R emov e the bolt and lock nut from the top of the motor unit. • Place rail onto the bolt mounted on the motor unit and align the back hole with the hole in the top of the unit. •F asten ra ...
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Chamberlain 2575 - page 7
7 ASSEMBL Y STEP 3 Tighten the Chain • Spin the inner nut and loc k washer down the threaded shaft, aw a y from the trolley . •T o tighten the chain, tur n outer nut in the direction shown. As y ou turn the nut, keep the chain from twisting. • When the chain is appro ximately 1/2" abov e the base of the T -rail at its midpoint, re-tighte ...
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Chamberlain 2575 - page 8
8 INST ALLA TION STEP 1 Determine the Header Bracket Location Installation procedures va r y according to garage door types. Follo w the instructions which apply to your door . SECTIONAL DOOR AND ONE-PIECE DOOR WITH TRA CK 1. Close the door and mark the inside vertical centerline of the garage door . 2. Extend the line onto the header w all abov e ...
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Chamberlain 2575 - page 9
9 Header Wall Vertical Centerline Vertical Centerline of Garage Door 2x4 Unfinished Ceiling 2x4 OPTIONAL CEILING MOUNT FOR HEADER BRACKET Structural Supports ONE-PIECE DOOR WITHOUT TRA CK 1. Close the door and mark the inside vertical centerline of your garage door . Extend the line onto the header wall abo ve door , as shown. If headroom clearance ...
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Chamberlain 2575 - page 10
10 INST ALLA TION STEP 2 Install the Header Bracket Y ou can attach the header brack et either to the wall abov e the garage door , or to the ceiling. F ollow the instructions which will work best for y our par ticular requirements. Do not install the header brac ket o ver drywall. If installing into masonry , use concrete anchors (not pr ovided). ...
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Chamberlain 2575 - page 11
Clevis Pin 5/16"x2-3/4" Ring Fastener 11 INST ALLA TION STEP 3 Attach the T -Rail to the Header 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 opener securely on a temporary support to ...
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Chamberlain 2575 - page 12
12 ONE-PIECE DOOR WITHOUT TRACK • With the door fully open and parallel to the floor , measure the distance from the floor to the top of the door . • Using a stepladder as a support, raise the top of the opener to this height. • The top of the door should be level with the top of the motor unit. Do not position the opener more than 2" ab ...
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Chamberlain 2575 - page 13
13 INST ALLA TION STEP 5 Hang the Opener T wo representative installations are shown. Y ours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support. On finished ceilings (Figure 2), attach a sturdy metal bracket to structural supports before installing the opener . This bracket and fastening hardware are not provide ...
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Chamberlain 2575 - page 14
KG 1 3 9 7 5 KG 1 3 9 7 5 14 INST ALLA TION STEP 6 Install the Door Control Locate door control within sight of the door at a minimum height of 5 feet where small children cannot reach, and away from moving parts of the door and door hardware. The installation surface must be smooth and flat. If installing into drywall (Figure 1), drill 5/32" ...
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Chamberlain 2575 - page 15
15 INST ALLA TION STEP 7 Install the Lights • 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. The lights will turn ON and remain lit for approximately 4-1/2 minutes when pow ...
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Chamberlain 2575 - page 16
16 INST ALLA TION STEP 9 Electrical Requirements T o avoid installation difficulties, do not run the opener at this time. T o 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, co ...
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Chamberlain 2575 - page 17
17 Invisible Light Beam Protection Area Sensor Beam 6" max. above floor Sensor Beam 6" max. above floor Facing the door from inside the garage INST ALLA TION 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. IMPORT ANT ...
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Chamberlain 2575 - page 18
18 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 (See Accessories) Lens Indicator light Attach with concrete anchors (not provided) Inside G arage W all Indicator light Sensor Bracket Lens Extension Bracket (See Accessories) Inside G ...
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Chamberlain 2575 - page 19
19 Carriage bolt 1/4"-20x1/2" Lens Wing nut Figure 4 MOUNTING AND WIRING THE SAFETY 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 (Fi ...
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Chamberlain 2575 - page 20
20 INST ALLA TION 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 o ...
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Chamberlain 2575 - page 21
21 Header Wall Vertical Centerline of Garage Door Finished Ceiling Optional Placement of Door Bracket Header Bracket Door Bracket 2x4 Support For a door with no exposed framing, or for the optional installation, use 5/16"x1-1/2" lag screws (Not provided) to fasten door bracket. MET AL DOOR Top of Door (Inside Garage) Door Bracket Optional ...
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Chamberlain 2575 - page 22
22 INST ALLA TION STEP 12 Connect Door Arm to T rolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONL Y • Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley . Slide the outer trolley back (away from t ...
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Chamberlain 2575 - page 23
23 ALL ONE-PIECE DOORS 1. Assemble the door arm, Figure 4: • Fasten the straight and curved door arm sections together to the longest possible length (with a 2 or 3 hole overlap). • With the door closed, connect the straight door arm section to the door bracket with the 5/16"x1-1/4" clevis pin. • Secure with a ring fastener . 2. Adj ...
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Chamberlain 2575 - page 24
24 ADJUSTMENT STEP 1 Adjust the UP and DOWN T ravel Limits Limit adjustment settings regulate the points at which the door will stop when moving up or down. T o 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 rev ...
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Chamberlain 2575 - page 25
ADJUSTMENT STEP 2 Adjust the Force Force adjustment controls are located on the right side panel of the motor unit. Force adjustment settings regulate the amount of power required to open and close the door . If the forces are set too light, door travel may be interrupted by nuisance reversals in the down direction and stops in the up direction. We ...
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Chamberlain 2575 - page 26
Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSL Y INJURED or KILLED by a closing garage door . • Safety reversal system MUST be tested ever y month. • If one control (force or travel limits) is adjusted, the other control may also need adjustment. • After ANY adjustments are made, t ...
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Chamberlain 2575 - page 27
OPERA TION Using Y our Garage Door Opener Y our Security ✚ opener and hand-held remote control have been factory-set to a matching code which changes with each use, randomly accessing over 100 billion new codes. Y our opener will operate with up to eight Security ✚ remote controls and one Security ✚ Keyless Entry System. If you purchase a new ...
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Chamberlain 2575 - page 28
28 Additional feature when used with the 3-function hand-held remote T o control the opener lights: In addition to operating the door , you may program the remote to operate the lights. 1. With the door closed, press and hold a small remote button that you want to control the light. 2. Press and hold the Light button on the door control. 3. While h ...
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Chamberlain 2575 - page 29
CARE OF YOUR OPENER LIMIT AND FORCE ADJUSTMENTS: Weather conditions may cause some minor changes in door operation requiring some re- adjustments, particularly during the first year of operation. Pages 24 and 25 refer to the limit and force adjustments. Only a screwdriver is required. Follow the instructions carefully . Repeat the safety reverse te ...
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Chamberlain 2575 - page 30
30 Having a Problem? (Continued) 6. The garage door opens and closes by itself: • Be sure that all remote control push buttons are off. • Remove the bell wire from the door control terminals and operate from the remote only . If this solves the problem, the door control is faulty (replace), or there is an intermittent short on the wire between ...
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Chamberlain 2575 - page 31
*3-Channel Remotes If provided with your garage door opener , the large button is factory programmed to operate it. Additional buttons on any Security ✚ 3-channel remote or mini-remote can be programmed to operate other Security ✚ garage door openers. T o Erase All Codes From Motor Unit Memory T o deactivate any unwanted remote, first erase all ...
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Chamberlain 2575 - page 32
1. Enter a four digit personal identification number (PIN) of your choice on the keypad. Then press and hold ENTER. 2. While holding the ENTER button, press and hold the LIGHT button on the Motion Detecting Door Control. 3. Continue holding the ENTER and LIGHT buttons while you press the push bar on the Motion Detecting Door Control (all three butt ...
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Chamberlain 2575 - page 33
7 10 11 5 N O T IC E U P C E I L I N G M O U N T O N L Y 8 6 1 4 3 2 9 12 L O C K LIG H T 1 3 4 5 6 2 Installation Parts 33 REP AIR P ARTS Rail Assembly Parts KEY P ART NO. NO. DESCRIPTION 1 4A1008 Master link kit 2 41A4813 Chain pulley bracket 3 41A3489 Complete trolley assembly 4 1707LM One-piece T -rail 5 41D3484 Full chain assembly 6 83A1 1-2 R ...
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Chamberlain 2575 - page 34
Motor Unit Assembly Parts 34 DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSY. Grey Wire Yellow Wire (Up) Contact Center Limit Contact Drive Gear 2 4 3 1 15 19 8A 17 5 18 9 10 16 14 13 12 6 6 11 8B 8C 7 7 KEY P ART NO. NO. DESCRIPTION 1 41A5615 Chain spreader 2 41A5585-1 Gear and sprocket assembly Complete with: Spring washer , thrust washer , ret ...
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Chamberlain 2575 - page 35
35 L O C K L IG H T C L O S E D O P E N ACCESSORIES 974LM 970LM 995LM 1708LM 41A5281 1702LM Outside Quick Release: Required for a garage with NO access door . Enables homeowner to open garage door manually from outside by disengaging trolley . 8 Foot Complete Rail: T o allow an 8 foot door to open fully . Remote Light Control: Enables homeowner to ...
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Chamberlain 2575 - page 36
LIFTMASTER GARAGE DOOR OPENER FIVE-YEAR LIMITED W ARRANTY The Chamberlain Group, Inc., (“Seller”) warrants, to the first retail purchaser of this product, for the residence in which this product is originally installed, that it will be free from any defect in materials and/or workmanship for a period of sixty full months from the date of purcha ...
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