The Sprocket Cover - Chamberlain Security+ 3112E FS2 Owner's Manual

ASSEMBLY STEP 5
For Sectional and One-Piece Doors Only
Install the Chain/Cable and Attach

the Sprocket Cover

1. Pull the cable loop from
the carton and fasten it
to the trolley with a
master link from the
hardware bag
(Figure 1).
• Push pins of master
link bar through cable
loop and hole in front end of trolley.
• Push master link cap over pins and past pin
notches.
• Slide clip-on spring over cap and onto pin
notches until both pins are securely locked in
place.
2. With the trolley against the screwdriver, dispense
the cable around the pulley.
3. Model 3112E:
• Continue along the rail and around the motor unit
sprocket (Figure 2). The sprocket teeth must
engage the chain. Continue forward to the trolley
threaded shaft.
Model 3122E:
• Continue along the rail and around the motor unit
sprocket (Figure 2). Proceed back around the
correct groove in the chain spreader (Figure 3).
The sprocket teeth must engage the chain.
4. Use the second master link to connect the chain to
the flat end of the shaft (Figure 1). Check to make
sure the chain is not twisted.
5. Remove the screwdriver.
ATTACHING THE SPROCKET COVER
3112E ONLY
Insert the back tab in the slot on the back of the
mounting plate. Squeeze the cover slightly and insert
the front tab (Figure 4).
Figure 4
Sprocket
Cover
Front Tab Slot
Mounting
Plate
Leave Chain
& Cable
Inside Carton to
Prevent Kinking
Keep Chain
Taut When Dispensing
Back Tab Slot
Top of Motor Unit
WARNING
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
CAUTION
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach sprocket cover BEFORE operating.
Figure 1
Master Link
Clip-On Spring
Master Link Cap
Cable
Loop
Cable
Pulley
INSTALL CHAIN & CABLE
IN THIS DIRECTION
Figure 2
Figure 3
Chain
Spreader
6-Tooth Sprocket Application (Model 3122E)
Chain
Spreader
8-Tooth Sprocket Application (Model 3122E)
(6-tooth sprocket can be used if slower travel speed
13
Master Link
Clip-On Spring
Master
Link Cap
Flat end
of Trolley
Threaded
Shaft
Master
Link Bar
Install Chain
Chain
In This Direction
Spreader
Motor Unit
Sprocket
6-Tooth
Sprocket
Opener
Mounting Plate
One-Piece Doors
8-Tooth
Sprocket
Opener
Mounting Plate
Sectional Doors
is desired.)
Chain
Pin
Notch
Pin