Installation - Chamberlain MH 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 operator
preparations on page 3. Refer to the illustration and instructions below that suits your application.
1a. Wall Mounting
The operator should generally be installed below
the door shaft, and as close to the door as
possible. The optimum distance between the door
shaft and operator drive shaft is between 12" - 15"
(Figure 3).
FIGURE 3
1c. Place door sprocket on the door shaft. Do not
insert the key at this time.
2. Place drive sprocket on the appropriate side of the
operator. Do not insert the key at this time.
3. Wrap drive chain around door sprocket and join
roller chain ends together with master link.
4. Raise operator to approximate mounting position
and position chain over operator sprocket.
5. 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.
6. Align sprockets and secure (Figure 5).

INSTALLATION

Optimum Distance
12 - 15"
Typical Right Hand
Wall Mounted Operator
1b. Bracket or Shelf Mounting
The operator may be mounted either above or
below the door shaft.
between the door shaft and operator drive shaft is
between 12" - 15" (Figure 4).
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.
4
The optimum distance
OPTIONAL
OPTIONAL
Mounting Bracket
Mounting Bracket
P/N 08-9098
P/N 10-9095
Optimum Distance
12 - 15"
FIGURE 4
Be sure door
sprocket is properly
aligned with drive
before securing to
the shaft.
Chain Retaining
Bracket
FIGURE 5