LiftMaster 3275 3275 Manual - Page 7

IMPORTANT INSTALLATION INSTRUCTIONS, To reduce the risk of SEVERE INJURY or DEATH - manual

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ASSEMBLY STEP 3 Tighten the Chain Figure 1 To Tighten Outer Nut Outer Nut Lock Washer Inner Nut • Spin the inner nut and lock washer down the trolley threaded shaft, away from the trolley. To Tighten Inner Nut • To tighten the chain, turn outer nut in the direction shown (Figure 1). Trolley • When the chain is approximately 1/2" (13 mm) above the base of the rail at its midpoint, re-tighten the inner nut to secure the adjustment. Figure 2 Sprocket noise can result if 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 in Figure 2 when the door is open, do not re-adjust the chain. Chain 1/2" (13 mm) WARNING NOTE: During future maintenance, ALWAYS pull the emergency release handle to disconnect trolley before Base of Rail adjusting chain. You may notice loosening of chain after Adjustment Step 3 (Test the Safety Reversal System). Check for proper tension and readjust chain if necessary. Then repeat Adjustment Step 3. Mid Length of Rail You have now finished assembling your garage door opener. Please read the following warnings before proceeding to the installation section. WARNING INSTALLATION IMPORTANT INSTALLATION INSTRUCTIONS WARNING To reduce the risk of SEVERE INJURY or DEATH: 1. READ AND FOLLOW ALL INSTALLATION 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 result in SEVERE INJURY or DEATH. 3. ALL repairs to cables, spring assemblies and other hardware MUST be made by a trained door systems technician BEFORE installing opener. 4. Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to avoid entanglement. 5. Install garage door opener 7 feet (2.13 m) or more above floor. 6. Mount emergency release handle 6 feet (1.83 m) above floor. 7. NEVER connect garage door opener to power source until instructed to do so. 8. NEVER wear watches, rings or loose clothing while installing or servicing opener. They could be caught in garage door or opener mechanisms. 9. Install wall-mounted garage door control: • within sight of the garage door. • out of reach of children at minimum height of 5 feet (1.5 m). • away from ALL moving parts of the door. 10. Place entrapment warning label on wall next to garage door control. 11. Place manual release/safety reverse test label in plain view on inside of garage door. 12. Upon completion of installation, test safety reversal system. Door MUST reverse on contact with a 1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on the floor. 7

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7
ASSEMBLY STEP 3
Tighten the Chain
•
Spin the inner nut and lock washer down the trolley
threaded shaft, away from the trolley.
•
To tighten the chain, turn outer nut in the direction
shown (Figure 1).
•
When the chain is approximately 1/2" (13 mm) above
the base of the rail at its midpoint, re-tighten the inner
nut to secure the adjustment.
Sprocket noise can result if 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 in Figure 2 when the door is
open, do not re-adjust the chain.
NOTE:
During future maintenance, ALWAYS pull the
emergency release handle to disconnect trolley before
adjusting chain. You may notice loosening of chain after
Adjustment Step 3 (Test the Safety Reversal System).
Check for proper tension and readjust chain if necessary.
Then repeat Adjustment Step 3.
You have now finished assembling your garage door
opener. Please read the following warnings before
proceeding to the installation section.
Figure 1
Figure 2
To Tighten Outer Nut
Lock
Washer
To Tighten Inner Nut
Chain
Base of Rail
Outer
Nut
Inner Nut
Trolley
1/2” (13 mm)
Mid Length of Rail
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
WARNING
WARNING
1.
READ AND FOLLOW ALL INSTALLATION
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 result in SEVERE INJURY or DEATH.
3.
ALL repairs to cables, spring assemblies and other
hardware MUST be made by a trained door systems
technician BEFORE installing opener.
4.
Disable ALL locks and remove ALL ropes connected
to garage door BEFORE installing opener to avoid
entanglement.
5.
Install garage door opener 7 feet (2.13 m) or more
above floor.
6.
Mount emergency release handle 6 feet (1.83 m)
above floor.
7.
NEVER connect garage door opener to power source
until instructed to do so.
8.
NEVER wear watches, rings or loose clothing while
installing or servicing opener. They could be caught
in garage door or opener mechanisms.
9. Install wall-mounted garage door control:
• within sight of the garage door.
•
out of reach of children at minimum height
of 5 feet (1.5 m).
• away from ALL moving parts of the door.
10.
Place entrapment warning label on wall next to
garage door control.
11.
Place manual release/safety reverse test label in
plain view on inside of garage door.
12.
Upon completion of installation, test safety reversal
system. Door MUST reverse on contact with a
1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on
the floor.