Chamberlain HD220C Manual

1
Safety Symbol and Signal Word Review
This garage door opener hasbeen designed and tested to offer safe service provided it is installed,
operated,maintained and tested in strict accordance with the instructions and warnings contained in this
manual.
When you see these Safety Symbols and Signal Words on the following pages,they will alert you to the
possibilityofserious injury or death ifyou do notcomply with 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 this Signal Word on the following pages,it will alert you to the possibilityof damage to
your garage door and/or the garage door opener if you do notcomply with the cautionary statements that
accompanyit. Read them carefully.
Check the Door
To preventpossible SERIOUS INJURY or DEATH:
l ALWAYS call a trained door systemstechnician if garage door binds,sticks, or is outof balance.
An unbalanced garage door mayNOT reverse when required.
l NEVER try to loosen, move or adjust garage door, door springs,cables,pulleys, bracketsor their
hardware, ALL of which are under EXTREME tension.
l Disable ALL locks and 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 120 V,60 Hz to avoid malfunction and damage.
1. Disable locksand remove anyropes connected to the garage door.
2. Lift the door halfway up. Release the door. Ifbalanced, it should stay in
place, supported entirely by its springs.
3. Raise and lower the door to checkfor binding or sticking. Ifyour door
binds, sticks, or is outof 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 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. 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 right of the
door center.See page 11.
Torsion
Spring
Extension
Spring
OR
Preparation

Chamberlain HD220C Specifications

General

Brand	Chamberlain
Model	HD220C
Category	Garage Door Opener
Language	English