Chamberlain 9950D Assemble the Rail (Continued)

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 be on a level surface to achieve proper alignment and to avoid damage to the pins.

6. Insert two 1/4"-20x1-3/4" bolts through the center

holes of a brace, and place its open length against				HARDWARE SHOWN ACTUAL SIZE
the rail at the joint, aligning the holes as shown.				HARDWARE SHOWN ACTUAL SIZE
the rail at the joint, aligning the holes as shown.
Position another brace on the opposite side of the
rail over the bolts, add 1/4"-20 lock nuts, and hand
tighten. Insert two additional bolts and hand
tighten.				Bolt	Lock Nut
7. Keeping the rail straight and on a level surface,				1/4"-20x1-3/4" (8)	1/4"-20
7. Keeping the rail straight and on a level surface,
grasp the screw rods on each side of the
remaining joint and pivot into a straight line.
Repeat steps 5 and 6.
8. With a 7/16" wrench, tighten bolts until snug,
beginning with the center holes. Do not					Sprocket End
overtighten.					Sprocket End
overtighten.					(Back)
			Rail
			Support
			Brace	Alignment
		Lock		Alignment
		Lock		Hole	Slide end rail
		Nuts		Hole	Slide end rail
		Nuts		Rail Pin	toward center rail
					toward center rail

	Rail
	Support				Bolts
	Brace				Bolts
Lock		Rail Pin			1/4"-20x1-3/4"
	Alignment	Rail Pin

Nuts
Nuts	Hole
	Hole
			Center Rail	Alignment	End
				Alignment	End
				Hole	Rail
				Rail Pin
Door End				Center
(Front)			Bolts	Rail
			Bolts
	Slide end rail		1/4"-20x1-3/4"
	Slide end rail
	toward center rail

9

Contents

For Residential Use Only Introduction Assembly Installation Adjustment Operation Preparing your garage door Tools needed Planning Planning (Continued) Carton Inventory Hardware Inventory Assemble the Rail Assemble the Rail (Continued) Fasten the Rail to the Motor Unit and Install the Trolley Attach the Rail Brackets Determine the Header Bracket Location Install the Header Bracket Attach the Rail to the Header Bracket Install The Protector System® INSTALLING THE BRACKETS Garage door track installation (preferred): Wall installation (Figure 2 & 3): Figure Floor installation (Figure 4): MOUNTING AND WIRING THE SAFETY REVERSING SENSORS Recommended Wire Routing Do not use the lower (trolley) channels Position the Opener Hang the Opener Install the Door Control Install the Lights and Lens Attach the Emergency Release Rope and Handle Electrical Requirements Complete the Safety Reversing Sensor Installation Fasten the Door Bracket ONE-PIECEDOORS Metal Doors: Connect Door Arm to Trolley ALL ONE-PIECEDOORS 1.Assemble the door arm, Figure 4: 2.Adjustment procedures, Figure 5: •Open door adjustment: decrease UP travel limit •Closed door adjustment: decrease DOWN travel limit Adjust the UP and DOWN Travel Limits Adjust the Force Test the Safety Reversal System Test The Protector System® Using Your Garage Door Opener Using the Wall-MountedDoor Control To Open the Door Manually CARE OF YOUR OPENER LIMIT AND FORCE ADJUSTMENTS: Repeat the safety reverse test (Adjustment Step 3, page 29) after any adjustment of limits or force THE REMOTE CONTROL BATTERY HAVING A PROBLEM 1. My door will not close and the light bulbs blink on my motor unit: 2. My remotes will not activate the door: 3. My door reverses for no apparent reason: 1 FLASH 2 FLASHES 3 FLASHES 4 FLASHES 5 FLASHES To Add or Reprogram a Hand-heldRemote Control To Erase All Codes From Motor Unit Memory *3-ButtonRemotes To Add, Reprogram or Change a Keyless Entry PIN Rail Assembly Parts Installation Parts Motor Unit Assembly Parts ACCESSORIES 953D SECURITY✚® Multi-Function Remote Control: 945CB www.chamberlain-diy.com CHAMBERLAIN® ONE-YEARLIMITED WARRANTY LIFETIME MOTOR WARRANTY