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Chamberlain C450 C450 Owner s Manual - English - Page 10

STEP 5 Tighten the chain

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Assembly STEP 5 Tighten the chain 1. Spin the inner nut and lock washer down the trolley threaded shaft, away from the trolley. 2. To tighten the chain, turn the outer nut in the direction shown. 3. When the chain is approximately 1/4" (6 mm) above the base of the rail at it's midpoint, retighten the inner nut to secure the adjustment. Sprocket noise can result if the chain is too loose. When installation is complete, you may notice some chain droop with the door closed. This is normal. If the chain returns to the position shown when the door is open, do not re-adjust the chain. NOTE: During future maintenance, ALWAYS pull the emergency release handle to disconnect the trolley before adjusting the chain. You have now finished assembling your garage door opener. Please read the following warnings before proceeding to the installation section. Trolley To Tighten Outer Lock Threaded Outer Nut Nut Washer Shaft To Tighten Inner Nut Inner Nut Chain Base of Rail 1/4" (6 mm) Mid length of Rail 10

Section	Page
Preparation	2
Safety Symbol and Signal Word Review	2
Unattended Operation	2
Check the Door	2
Before You Connect with Your Smartphone	3
Additional Items You May Need:	3
Tools Needed	3
Carton Inventory	4
Hardware	5
Assembly	6
STEP 1 Assemble the rail and install the trolley	6
STEP 2 Fasten the rail to the motor unit	7
STEP 3 Install the idler pulley	8
STEP 4 Install the chain	9
STEP 5 Tighten the chain	10
Installation	11
STEP 1 Determine the header bracket location	12
STEP 2 Install the header bracket	13
OPTION A WALL INSTALLATION	13
OPTION B CEILING INSTALLATION	13
STEP 3 Attach the rail to the header bracket	14
STEP 4 Position the garage door opener	14
STEP 5 Hang the garage door opener	15
STEP 6 Install the light bulbs	16
STEP 7 Attach the emergency release rope and handle	16
STEP 8 Install the door bracket	17
OPTION A SECTIONAL DOORS	17
OPTION B ONE-PIECE DOORS	18
STEP 9 Connect the door arm to the trolley	19
OPTION A SECTIONAL DOORS	19
OPTION B ONE-PIECE DOORS	20
STEP 10 Install the door control	21
STEP 11 Wire the door control to the garage door opener	22
STEP 12 Attach the warning labels	22
STEP 13 Install the Protector System®	23
OPTION A DOOR TRACK INSTALLATION	23
OPTION B WALL INSTALLATION	24
OPTION C FLOOR INSTALLATION	24
STEP 14 Wire the Safety Reversing Sensors	25
OPTION A INSTALLATION WITHOUT PRE-WIRING	25
OPTION B PRE-WIRED INSTALLATION	26
STEP 15 Connect power	27
OPTION A TYPICAL WIRING	27
OPTION B PERMANENT WIRING	27
STEP 16 Aligning the safety reversing sensors	28
STEP 17 Ensure the door control is wired correctly	28
Introduction	29
One-Piece Doors Only	29
Programming Buttons	29
Adjustments	29
STEP 1 Program the Travel	30
STEP 2 Test the Safety Reversal System	31
STEP 3 Test the Protector System®	31
MyQ® Smartphone Control	32
Connect With Your Smartphone	32
Operation	33
Using your Garage Door Opener	34
To Open the Door Manually	34
DISCONNECT THE TROLLEY	34
TO RE-CONNECT THE TROLLEY	34
Multi-Function Control Panel	35
TIMER-TO-CLOSE (DO NOT enable on one-piece doors)	36
Remote Control and Keyless Entry	36
PROGRAM USING THE DOOR CONTROL	36
HomeLink®	36
To Erase the Memory	37
ERASE ALL REMOTE CONTROLS AND KEYLESS ENTRIES	37
ERASE ALL REMOTE CONTROLS, KEYLESS ENTRIES AND MyQ® DEVICES FROM GARAGE DOOR ...	37
ERASE THE CONNECTION FROM GARAGE DOOR OPENER TO HOME Wi-Fi NETWORK	37
ERASE A MyQ® ACCOUNT	37
Maintenance	38
Maintenance Schedule	38
The Remote Control Battery	38
Troubleshooting	39
Diagnostic Chart	39
Accessories	41
Warranty	42
Contact Information	42
Repair Parts	43
Rail Assembly Parts	43
Accessories	43
Installation Parts	43