Tighten The Chain; Installation; Installation Safety Instructions - Craftsman CMXEOCG231 Owner's Manual

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 (Figure 1).
3. When the chain is approximately 1/4" (6 mm) above the base of the rail at
it's 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.
NOTES:
During future maintenance, ALWAYS pull the emergency release handle to
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disconnect the trolley before adjusting the chain.
You may notice loosening of chain after Adjustment Step 2 (Test the
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Safety Reversal System). Check for proper tension and readjust chain if
necessary. Then repeat Adjustment Step 2.
You have now finished assembling your garage door opener. Please read the
following warnings before proceeding to the installation section.

INSTALLATION

IMPORTANT INSTALLATION INSTRUCTIONS
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. Where possible, install the door opener 7 feet (2.13 m) or more above the
floor.
6. Mount the emergency release within reach, but at least 6 feet (1.83 m) above
the floor and avoiding contact with vehicles to avoid accidental release.
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.
Figure 1
To Tighten Outer Nut
Figure 2
Chain
Base of Rail
9. Install wall-mounted garage door control:
within sight of the garage door.
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out of reach of small children at a minimum height of 5 feet
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(1.5 m) above floors, landings, steps or any other adjacent walking
surface.
away from ALL moving parts of the door.
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10. Place entrapment warning label on wall next to garage door control in a
prominent location.
11. Place emergency 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.
13. DO NOT install on a one-piece door if using devices or features providing
unattended close. Unattended devices and features are to be used ONLY with
sectional doors.
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Trolley
Outer Lock
Threaded
Nut Washer
Shaft
Inner Nut
To Tighten
Inner Nut
1/4" (6 mm)
Mid Length of Rail