Set The Tension; Installation; Installation Safety Instructions - Chamberlain Whisper Drive Security+ 248739 Owner's Manual

ASSEMBLY STEP 5
Set lhe Tension
• Insert a screwdriver tip into one of the nut ring slots
and brace it firmly against the trolley,
• Place a 7/t6" open end wrench on the square end.
Rotate the nut about II4 turn unfit the spring releases
and snaps the nut ring against the lrolley.
This sets the spring to optimum belt tension.
Youhave now finished assembling your garage door
opener. P/ease mad the fO//Owing warnings bolero
proceeding to the installation section.
Square
End
Trolley
NutRing Nut Ring
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reducethe risk of SEVERE INJURYor DEATH
1. READAND FOLLOWALL INSTALLATION
WARNINGSAND INSTRUCTIONS.
2. tnstatt garage door opener ONLY on properly
balancedand lubricated garage door. An improperly
balanceddoor may NOT reversewhen required and
could result in SEVEREINJURY or DEATH.
3. ALL _epairsto cables, spring assemblies and other
hardware MUST be made by a trained door systems
technician BEFOREinstalling opener.
4. Disable ALL locks and remove ALL ropes connected
to garage door BEFOREinstalling opener to avoid
entanglement.
5. Install garage door opener 7 feet (2.13 m) or more
above floor,
6. Mount the emergency releasewithin reach, but at
least 6 feet (1.8 m) above the floor and avoiding
contact with vehicles to avoid accidental release.
7. NEVERconnect garage door opener to power source
until instructed to do so.
8. NEVERwear watches, rings or loose clothing while
installing or servicing opener. They could be caught
in garage door or opener mechanisms.
9. lnstafi waiFmounted garage door control:
• within sight of the garage door.
* out of reach of children at minimum height
of 5feet (1.5 m).
- away from ALL moving parts of the door.
10. Placeentrapment warning label on wall next to
garage door control.
tl. Placemanual release/safetyreverse 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-I/2 '_(3.8 cm) high object (or a 2x4 laid flat) on
the floor.
tl