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ASSEMBLY STEP 5
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 1/4" (6 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
Trolley
Outer Lock Threaded
Nut Washer Shaft
Chain i
Base of Rail
I
Mid length of Rail
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READAND FOLLOWALL INSTALLATIONWARNINGS
AND INSTRUCTIONS.
2. Install garage door opener only on properly balanced
and lubricated garage door. An improperly balanced
door may not reversewhen required and could result in
SEVEREINJURYor DEATH.
3. ALL repairsto cables,spring assemblies and other
hardwareMUSTbe madeby a trained door systems
technician BEFOREinstalling opener.
4. DisableALL locks and remove ALL ropesconnectedto
garage door BEFOREinstalling opener to avoid
entanglement.
5. Install garage door opener 7 feet (2.13 m) or more
above floor.
6. Mount emergencyreleasehandle 6 feet (1.83 m) above
floor.
7. NEVERconnect garage door openerto power source
until instructed to do so.
8. NEVERwearwatches, rings or looseclothing 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).
• awayfrom ALL moving parts ofthe door.
10. Placeentrapmentwarning label on wall next to garage
door control.
11. Placemanual release/safetyreversetest label in plain
view on inside of garage door.
12. Uponcompletion of installation, test safety reversal
system. Door MUST reverseon contact with a
1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on
the floor.
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