Chamberlain 120ad Garage Door Opener User Manual


 
Safety Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fibreglass, steel, aluminum, door with
glass panels, etc.).
See page 21 for details.
Support bracket &
fastening hardware
is required.
See page 17.
— — — — — — — —
Door
Centre
Header Wall
Safety
Reversing
Sensor
Gap between floor and bottom of
door must not exceed 6mm.
FINISHED CEILING
Extension Spring
Torsion Spring
Access
Door
OR
Header
Sleeve Bracket
Header
Bracket
Trolley
Emergency
Garage
CLOSED POSITION
Rail Assembly
Motor Unit
10
o
Must be attached below
Panel Re-enforcement
if used.
Centre Stile
optimum
location for
attachment
4
Planning
Identify the type and height of your garage door
.
Survey your garage area to see if any of the
conditions below apply to your installation. Additional
materials may be required. You may find it helpful to
refer back to this page and the accompanying
illustrations as you proceed with the installation of
your opener.
Depending on your requirements, there are several
installation steps which may call for materials and/or
hardware not included in the carton.
Installation Step 1 – Look at the wall or ceiling
above the garage door. The header bracket must
be securely fastened to structural supports.
Installation Step 5 – Do you have a finished ceiling
in your garage? If so, a support bracket and
additional fastening hardware may be required.
B&D recommends the use of safety infrared
reversing sensors on all installations of
automatic garage door openers.
Installation Step 10:
– Depending upon garage construction, extension
brackets or wood blocks may be needed to
install the infrared safety sensors.
Alternate floor mounting of the infrared safety
sensors will require hardware not provided.
Do you have an access door in addition to the
garage door? If not, Model T7012 Emergency
Access Device is required.
SECTIONAL DOOR INSTALLATIONS
Do you have a steel, aluminum, fibreglass or glass
panel door? If so, horizontal and vertical reinforce
-
ment is required (Installation Step 11).
The opener is normally installed at the centre of
the door. If there is a torsion spring or centre
bearing plate in the way of the header bracket or
door bracket area, the opener may be installed
within 300mm to the left or right of the door centre.
See Installation Steps 1 and 11.
Look at the garage door where it meets the floor. It
must close on the floor all the way across.
Otherwise, the safety reverse system may not work
properly. See Adjustment Step 3. Floor or door
should be repaired.
OPENER ARM MOUNTING LOCATION
Must be mounted on a stile. Add an additional stile if
required or offset mount the opener (see below and
page 5). Attach arm 1/3 panel height from top at 10
O
as shown.
Sectional Door Installation
1
14A2845
Excess MUST
be removed
Re-enforcement
Panel Height
10
o
1/3
Safety Reversing Sensor
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.).
See page 21 for details.
Support bracket &
fastening hardware
is required.
See page 17.
— — — — — — — —
Door
Center
Header Wall
Safety
Reversing
Sensor
Gap between floor and bottom of
door must not exceed 6mm.
FINISHED CEILING
Extension Spring
Torsion Spring
Access
Door
OR
Header
Sleeve Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope & Handle
Door
Bracket
Garage
Door
Curved
Door
Arm
Garage
Door
Spring
Header
Wall
CLOSED POSITION
Rail Assembly
Motor Unit
Excess MUST
be removed
Re-enforcement
Panel Height
10
o
1/3