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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.
NOTE: You may notice loosening of chain after
Adjustment Step 3 (Test the Safety Reversal
System). Check for proper tension and readjust
chain if necessar_ 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 I Trolley
Outer Lock Threaded
Nut Washer Shaft
TO Tighten Outer Nut
Figure 2
TO Tighten
Inner Nut
Chain i
I
Base of Rail 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 garagedoor. An improperly balanced
door may not reversewhen required and could result in
SEVEREINJURYor DEATH.
3. All repairs to cables,spring assembliesand other
hardware MUSTbe made by a trained door systems
technician BEFOREinstalling opener.
4. Disableall locksand remove all ropesconnected to
garagedoor BEFOREinstalling openerto avoid
entanglement.
5. Install garage door opener 7 feet (2.13 m) or more
abovefloor.
6. Mount emergency releasehandle 6 feet (1.83 m) above
floor.
7. NEVERconnect garage door openerto power source
until instructed to do so.
8. NEVERwear watches, rings or loose clothing while
installing or servicing opener.Theycould be caught in
garage door or opener mechanisms.
9. Install wall-mounted garagedoor control:
• within sight of the garage door.
• out of reach of children at minimum height of 5 feet
(1.5m).
• away from all moving parts of the door.
10. Placeentrapment warning label on wall nextto 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 MUSTreverseon contact with a
1-1/2" (3.8 cm) high object (or a 2x4 laid flat) on
the floor.
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