Installation; Mount The Operator - Chamberlain MGJ Owner's Manual

IMPORTANT NOTE: Before your operator is installed, be sure the
door has been properly aligned and is working smoothly. The
operator may be wall mounted or mounted on a bracket or shelf.
If necessary, refer to the preparation on page 5. Refer to the
illustration and instructions below that suits your application.

MOUNT THE OPERATOR

1. Wall Mount: The operator should generally be installed below
the door shaft, and as close to the door as possible (Figure1).
Bracket Shelf Mounting: The operator may be mounted
either above or below the door shaft (Figure 2).
IMPORTANT: The shelf or bracket must provide adequate
support, prevent play between operator and door shaft, and
permit operator to be fastened securely and with the drive shaft
parallel to the door shaft.
NOTE: The optimum distance between the door shaft and
operator drive shaft is between 12-15" (30.5-38.1 cm).
2. Place door sprocket on the door shaft. Do not insert the key
at this time.
3. Place drive sprocket on the appropriate side of the operator.
Do not insert the key at this time.
4. Wrap drive chain around door sprocket and join roller chain
ends together with master link.
5. Raise operator to approximate mounting position and
position chain over operator sprocket.
6. Raise or lower operator until the chain is taut (not tight).
Make sure the operator output shaft is parallel to door shaft
and sprockets are aligned. When in position, secure the
operator to wall or mounting bracket.
7. Align sprockets and secure (Figure 3).
8. Install Hand Chain (Model MGH only)
Place hand chain around hand chain wheel. Be sure to pass it
through both openings in the chain guide. Remove enough
links so chain hangs approximately 2' (.61 m) above the
floor.
9. Mount Chain Keeper / Keyhole Bracket
Using suitable hardware mount the chain keeper
approximately 4' (1.22 m) above the floor, near the free
hanging chain. Remove disconnect sash chain from bag and
place the end through the keyhole in the chain keeper.
Remove excess links if necessary.
I N S T A L L A T I O N
FIGURE 1
FIGURE 2
FIGURE 3
Be sure door sprocket is
properly aligned with drive
before securing to
the shaft.
7
Typical Right Hand
Wall Mounted Operator
OPTIONAL
Mounting Bracket
P/N 089098