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Chamberlain PD752KEV Manual

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Safety Symbol and Signal Word Review
This garage door opener has been designed and tested to offer safe service provided it is installed,
operated, maintained and tested in strictaccordance with the instructions and warnings contained in this
manual.
When you see these Safety Symbolsand Signal Wordson the following pages,they will alertyou to the
possibilityofserious injury or death if you do notcomplywith the warnings that accompany them. The
hazard may come from something mechanical or from electric shock. Read the warnings carefully.
Mechanical
Electrical
When you see thisSignal Word on the following pages,it will alertyou to the possibilityof damage to
your garage door and/or the garage door opener if you do notcomplywith the cautionary statements that
accompanyit.Read them carefully.
Check the Door
To prevent possible SERIOUSINJURYor DEATH:
• ALWAYS call a trained door systems technician if garage door binds,sticks,or is out ofbalance.
An unbalanced garage door mayNOT reverse when required.
• NEVER try to loosen, move or adjustgarage door, door springs, cables,pulleys, bracketsor their
hardware, ALLof which are under EXTREMEtension.
• Disable ALLlocks and remove ALLropes connected to garage door BEFORE installation and
operating garage door opener to avoid entanglement.
To prevent damage to garage door and opener:
• ALWAYS disable locks BEFORE installing and operating the opener.
• ONLY operate garage door opener at 120 V,60 Hzto avoid malfunction and damage.
1. Disable locks and remove any ropesconnected to the garage door.
2. Liftthe door halfway up. Release the door. If balanced, itshould
stay in place, supported entirely by its springs.
3. Raise and lower the door to check for binding or sticking. If your
door binds,sticks,or is out ofbalance,call a trained door systems
technician.
4. Check the seal on the bottom ofthe door. Any gap between the
floor and the bottom ofthe door mustnot exceed 1/4 inch (6 mm).
Otherwise,the safetyreversal system may not work properly.
5. The opener should be installed above the center of the door. If
there isa torsion spring or center bearing plate in the way ofthe
header bracket,it maybe installed within 4 feet (1.2 m) to the left or
rightofthe door center. See page 13.
Torsion
Spring
Extension
Spring
OR
Preparation
2 …


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