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 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
To Tighten Outer Nut
Nut
To Tighten
Inner Nut
Chain
11 _, 1/4" (6 mm)
I ',
Base of Rail Mid length of Rail
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READAND FOLLOWALL INSTALLATIONWARNINGSAND
INSTRUCTIONS.
2. Install garagedoor opener ONLYon properly balancedand
lubricated garage door. An improperly balanceddoor may
NOTreversewhen required and could result in SEVERE
INJURYor DEATH.
3. ALL repairs to cables,spring assembliesand other hardware
MUSTbe madeby a trained door systemstechnician
BEFOREinstalling opener.
4. DisableALL locks and removeALL ropesconnected
to garage door BEFOREinstalling opener to avoid
entanglement.
5. Install garagedoor opener7 feet (2.13 m) or more above
floor.
6. Mount emergency releasewithin reach,but at least6 feet
(1.8 m) abovethefloor and avoiding contact with vehicles to
avoid accidentalrelease.
7. NEVERconnect garagedoor openerto power source until
instructed to do so.
8. NEVERwear watches, rings or looseclothing while
installing or servicing opener. They could be caught in
garage door or opener mechanisms.
9. Installwall-mounted garagedoor control:
• within sight of the garagedoor.
• out of reachof children at minimum heightof 5 feet
(1.5 m).
• awayfrom ALL moving parts of thedoor.
10. Placeentrapmentwarning labelon 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.
11
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