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Chamberlain PD420 - page 1
The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1 196 www .chamberlain.com GARAGE DOOR OPENER Models PD420 • PD420-2 • PD460-2 • PD460-2K 1/2 HP For Residential Use Only ® Owner’s Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near the garage door after installati ...
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Chamberlain PD420 - page 2
2 T ABLE OF CONTENTS Introduction 2-5 Safety symbol and signal word review ........................2 Preparing your garage door ........................................3 T ools needed ...............................................................3 Planning ..................................................................4-5 Carton inventory ..... ...
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Chamberlain PD420 - page 3
3 Pliers Wire Cutters Claw Hammer Hack Saw Screwdriver Adjustable End Wrench 1/2" and 7/16" Sockets and Wrench Drill Tape Measure 2 1 Stepladder Pencil 3/16", 5/16" and 5/32" Drill Bits Carpenter's Level (Optional) T o prevent damage to garage door and opener: • AL WA YS disable locks BEFORE installing and operating ...
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Chamberlain PD420 - page 4
4 Safety Reversing Sensor Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.). See page 23 for details. Support bracket & fastening hardware is required. See page 19. — — — — — — — — Header Wall Safety Reversing Sensor Gap between floor and bott ...
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Chamberlain PD420 - page 5
5 Access Door Safety Reversing Sensor Safety Reversing Sensor Header Bracket Door Bracket Straight Door Arm Curved Door Arm Trolley Emergency Release Rope & Handle Rail Assembly Garage Door Header Wall Rail Bracket CLOSED POSITION Gap between floor and bottom of door must not exceed 1/4" (6 mm). Planning (Continued) ONE-PIECE DOOR INST ALL ...
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Chamberlain PD420 - page 6
6 Straight Door Arm Section Curved Door Arm Section Header Brack et U P C E I L I N G M O U N T O N L Y Sprock et Coupling 2-Conductor Bell Wire White & White/Red Header/Rail Brack ets Remote Control T ransmitter Visor Clip T rolley Rail Suppor t Braces (4) Hanging Brack ets Rail Assembly Door Brack et Model 460-2K Model 420 (1), Model 420-2 (2 ...
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Chamberlain PD420 - page 7
7 Lock Nut 1/4"-20x7/16 (12) Wing Nut 1/4"-20 (2) Carriage Bolt 1/4"-20x1/2" (2) Hex Bolt 1/4"-20x5/8" (4) Sprocket Coupling Sleeve Bolt 1/4-20x1-3/4" (8) Handle Nut 5/16"-18 (6) Ring Fastener (3) Clevis Pin 5/16"x2-3/4" (1) Insulated Staples (30) Dry Wall Anchors (2) Clevis Pin 5/16"x1" ( ...
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Chamberlain PD420 - page 8
8 T o prevent INJURY from pinching, keep hands and fingers away from the joints while assembling the rail. WARN ING CAUTION WARN ING WARN ING ASSEMBL Y STEP 1 Assemble the Rail T o avoid installation difficulties, do not run the garage door opener until instructed to do so. 1. Turn the opened rail carton upside down and empty its contents onto a le ...
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Chamberlain PD420 - page 9
9 Assemble the Rail (Continued) 4. Beginning with the sprocket end, straighten the two rail sections so that the screw rod is in a straight line at the joint. (Avoid handling the joint, which may have sharp edges.) 5. Carefully slide the pins at the top edge of the rail into the openings on the adjacent rail. It is essential that the rail assembly ...
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Chamberlain PD420 - page 10
10 ASSEMBL Y STEP 2 Fasten the Rail to the Motor Unit and Install the T rolley NOTE: T o aid in assembly and installation, replace the foam packing around the motor unit. Remove it after Installation Step 4. • Working on a level surface, align the rail assembly with the motor unit, as shown. • Slip the coupling over the rail sprocket. • Slide ...
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Chamberlain PD420 - page 11
11 INST ALLA TION IMPORT ANT INST ALLA TION INSTRUCTIONS T o reduce the risk of SEVERE INJUR Y or DEA TH: WARN ING WARN ING WARN ING 1. READ AND FOLLOW ALL INST ALLA TION WARNINGS AND INSTRUCTIONS. 2. Install garage door opener only on properly balanced and lubricated garage door . An improperly balanced door may not reverse when required and could ...
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Chamberlain PD420 - page 12
12 INST ALLA TION STEP 1 Determine the Header Bracket Location Installation procedures vary according to garage door types. Follow the instructions which apply to your door . 1. Close the door and mark the inside vertical centerline of the garage door . 2. Extend the line onto the header wall above the door . Y ou can fasten the header bracket with ...
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Chamberlain PD420 - page 13
13 INST ALLA TION STEP 2 Install the Header Bracket Y ou 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). W ALL HE ...
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Chamberlain PD420 - page 14
14 INST ALLA TION STEP 3 Attach the 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 allow the rail to clear the spring. • Position th ...
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Chamberlain PD420 - page 15
15 Invisible Light Beam Protection Area Sensor Beam 6" (15 cm) max. above floor Sensor Beam 6" (15 cm) max. above floor Facing the door from inside the garage INST ALLA TION STEP 4 Install The Protector System ® The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down directi ...
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Chamberlain PD420 - page 16
16 DOOR TRACK MOUNT (RIGHT SIDE) Indicator Light Lens Lip Sensor Bracket Door Track FLOOR MOUNT (RIGHT SIDE) WALL MOUNT (RIGHT SIDE) Indicator Light Sensor Bracket Lens Extension Bracket (See Accessories) Inside G arage W all (Provided with Extension Bracket) (Provided with Extension Bracket) Figure 1 Figure 2 Figure 3 Figure 4 WALL MOUNT (RIGHT SI ...
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Chamberlain PD420 - page 17
17 Carriage Bolt 1/4"-20x1/2" Lens Wing Nut Figure 5 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. Se ...
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Chamberlain PD420 - page 18
18 ONE-PIECE DOOR WITHOUT TRACK A 2x4 on its side is convenient for setting an ideal door-to-rail distance. • Remove foam packaging. • Raise the opener onto a stepladder . Y ou will need help at this point if the ladder is not tall enough. • Open the door all the way and place a 2x4 on its side on the top section of the door beneath the rail. ...
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Chamberlain PD420 - page 19
19 INST ALLA TION STEP 6 Hang the Opener Three 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 provid ...
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Chamberlain PD420 - page 20
To release wire, push in tab with screwdriver tip Door Control Connections Safety Sensor Connections Strip wire 7/16" (11 mm) Red Grey White 7/16" (11 mm) 20 INST ALLA TION STEP 7 Install the Door Control Locate door control within sight of door at a minimum height of 5 feet (1.5 m) where small children cannot reach, and away from moving ...
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Chamberlain PD420 - page 21
21 INST ALLA TION STEP 8 Install the Lights and Lens • Install a 100 watt maximum light bulb in each socket. The lights will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the lights will turn OFF . • Insert bottom lens tabs into slots on chassis. T ilt towards chassis to engage top tabs, then drop down gen ...
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Chamberlain PD420 - page 22
22 INST ALLA TION STEP 10 Electrical Requirements T o avoid installation difficulties, do not run the opener until Step 9 below . 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 ...
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Chamberlain PD420 - page 23
23 INST ALLA TION STEP 12 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 PD420 - page 24
24 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 lag screws 5/16"x1-1/2" (Not Provided) to fasten door bracket. MET AL DOOR Top of Door (Inside Garage) Door Bracket Optional ...
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Chamberlain PD420 - page 25
25 INST ALLA TION STEP 13 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 PD420 - page 26
26 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 PD420 - page 27
27 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 PD420 - page 28
28 ADJUSTMENT STEP 2 Adjust the Force Force adjustment controls are located on the back 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. Weath ...
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Chamberlain PD420 - page 29
29 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 ...
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Chamberlain PD420 - page 30
30 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 pu ...
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Chamberlain PD420 - page 31
31 T o Open the Door Manually DISCONNECT THE TROLLEY : The door should be fully closed if possible. Pull down on the emergency release handle (so that the trolley release arm snaps into a vertical position) and lift the door manually . The lockout feature prevents the trolley from reconnecting automatically , and the door can be raised and lowered ...
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Chamberlain PD420 - page 32
32 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 27 and 28 refer to the limit and force adjustments. Only a screwdriver is required. Follow the instructions carefully . Repeat the safety reverse ...
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Chamberlain PD420 - page 33
33 HA VING A PROBLEM? 1. My door will not close and the light bulbs blink on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. • V erify the safety sensors are properly installed, aligned and free of any obstructions. Refer to Installation Step 10: Ins ...
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Chamberlain PD420 - page 34
34 Installed Safety Sensor — — — — — — — — LED or Diagnostic LED "Learn" Button Diagnostics Located On Motor Unit Y our garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will flash a number of times then pause signifying it has found a potential issue. Consult Diagnos ...
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Chamberlain PD420 - page 35
*3-Button Remotes If provided with your garage door opener , the large button is factory programmed to operate it. Additional buttons on any Security ✚ ® 3-Button remote or compact 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 er ...
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Chamberlain PD420 - page 36
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 Multi-Function Door Control. 3. Continue holding the ENTER and LIGHT buttons while you press the push bar on the Multi-Function Door Control (all three buttons ...
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Chamberlain PD420 - page 37
7 10 12 5 N O T IC E 6 4 3 2 9 13 8 1 L O C K L IG H T 11 U P C E I L I N G M O U N T O N L Y 3 1 5 8 10 7 2 9 4 6 Installation Parts 37 REP AIR P AR TS Rail Assembly Parts KEY P ART NO. NO. DESCRIPTION 1 41A4796 Hardware bag 2 41A4795 Hardware bag (includes sprocket coupling) 3 12B569-1 Left rail bracket 4 12B569-2 Right rail bracket 5 1C4827-1 Sc ...
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Chamberlain PD420 - page 38
Motor Unit Assembly Parts 38 DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSY. Grey Wire Yellow Wire (Up) Contact Center Limit Contact Drive Gear 2 1 3 4 5 6 7 8 8a 8b 8c 9 10 11 11a 11 12 13 14 15 16 17 8d 8d 8e 8f 8g 18 KEY P ART NO. NO. DESCRIPTION 1 31D477 Drive shaft cover 2 41B4245 Line cord 3 30B363 Capacitor – 1/2 HP 4 12A373 Capacitor b ...
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Chamberlain PD420 - page 39
39 ACCESSORIES L O C K L IG H T LOCK LIGHT 7706CB 41A5281 956CB 953CB 935CB 950CB 1-Button Security ✚ ® Remote Control: Includes visor clip. 3-Button Security ✚ ® Remote Control: Includes visor clip. 3-Button Mini-Remote Control with Security ✚ ® : With key ring and fastening strip. Outside Quick Release: Required for a garage with NO acce ...
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Chamberlain PD420 - page 40
© 2004, The Chamberlain Group, Inc. 1 14A2466H All Rights Reserved Printed in Mexico HOW T O ORDER REP AIR P ARTS Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly . WHEN ORDERING REP AIR P ARTS, AL W A YS GIVE THE FOLLOWING INFORMA TION: • P ART NUMBER • P ART NAME • ...
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