Sprocket Cover - Chamberlain FS2 Security+ Owner's Manual

ASSEMBLY STEP 4
For Sectional and One-Piece Doors Only
Install the Chain and Attach the

Sprocket Cover

INSTALLING THE CHAIN
1. Dispense a few inches of chain
from carton and fasten to
trolley with a master link from
the hardware bag. (Figure 1).
• Push pins of master link bar
through chain link 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 chain
around the pulley.
3. Model 1215EM:
• 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 1225EM:
• 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 1215EM 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
Front Tab Slot
Leave Chain and
Cable Inside
Dispensing Carton
to Prevent Kinking.
Keep Chain and Cable
Taut When Dispensing
Sprocket
Cover
Back Tab Slot
Top of Motor Unit
Mounting
Plate
To avoid possible SERIOUS INJURY to fingers from moving
garage door opener:
• ALWAYS keep hand clear of sprocket while operating opener.
• Securely attach sprocket cover BEFORE operating.
Figure 1
Chain
Install Chain
Pulley
In This Direction Bracket
Figure 2
Figure 3
Chain
Spreader
6-Tooth Sprocket Application (Model 1225EM)
Chain
Spreader
8-Tooth Sprocket Application (Model 1225EM)
(6-tooth sprocket can be used if slower travel speed is
13
Master Link
Clip-On Spring
Master
Link Cap
Trolley
Flat End
of Trolley
Master
Link Bar
Install Chain
Chain
In This Direction
Spreader
Motor Unit
Sprocket
6-Tooth
Sprocket
Mounting
Plate
One-Piece Doors
8-Tooth
Sprocket
Mounting
Plate
Sectional Doors
desired.)
Flat End of
Threaded Shaft
Pin Notch
Pin