Chamberlain AccessMaster M885 - Preparation; Safety Symbol and Signal Word Review; Check the Door

1
Safety Symbol and Signal Word
Review
This garage door opener has been designed and
tested to offer safe service provided it isinstalled,
operated,maintained and tested in strict
accordance with the instructions and warnings
contained in this manual.
When you see these SafetySymbols and Signal
Words on the following pages,they will alertyou to
the possibility of serious injury or death if you do
not comply with the warningsthat accompanythem.
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, itwill alertyou to the possibilityof damage to
your garage door and/or the garage door opener if
you do not comply with the cautionary statements
thataccompanyit. Read them carefully.
Check the Door
To preventpossible SERIOUSINJURYor
DEATH:
l
ALWAYS call a trained door systems
technician if garage door binds,sticks,
or isout ofbalance. An unbalanced
garage door may NOTreverse when
required.
l
NEVER try to loosen, move or adjust
garage door, door springs,cables,
pulleys,brackets or their hardware,
ALLof which are under EXTREME
tension.
l
Disable ALLlocksand remove
ALLropes connected to garage door
BEFORE installation and operating
garage door opener to avoid
entanglement.
To preventdamage to garage door and opener:
l
ALWAYS disable locks BEFORE
installing and operating the opener.
l
ONLY operate garage door opener at
120V, 60 Hzto avoid malfunction and
damage.
1. Disable locks and remove any ropes
connected to the garage door.
2. Liftthe door halfway up.Release the
door.If balanced, it should stay in place,
supported entirely by itssprings.
3. Raise and lower the door to check for
binding or sticking. Ifyour door binds,
sticks, or is out of balance,call a trained
door systems technician.
4. Check the seal on the bottom of the door.
Any gap between the floor and the
bottom of the door must not exceed
1/4inch (6 mm).Otherwise, the safety
reversal system may notwork properly.
5. The opener should be installed above
the center of the door. Ifthere is a torsion
spring or center bearing plate in the way
of the header bracket, it maybe installed
within 4 feet (1.2 m) to the leftor rightof
the door center.See page 5.
Torsion
Spring
Extension
Spring
OR
Tools Needed
3/16
7/16
1/2
5/32
5/16
Preparation