LiftMaster LGJ Light-Duty Gear-Reduced Jackshaft Operator for Rolling Grilles and Shutters - Manual (Page 4)

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MGJ ELECTRICAL BOX - ILLUSTRATED PARTS
L8
L6
L2
1
L3
L1
L7
L2
4
7
3
9
S3
S9
S7
S4
S6
S3
S5
6
6
8
5
S2
S8
S1
2
S3
S7
S6
S4
S3
10
L3
L4
L5
LGJ LEFT HAND MOUNTING PREPARATIONS
1. Reconfigure Disconnect Chain Assembly
The default configuration for the disconnect chain assembly
is shown in Figure 1. This configuration allows the chain to
hang freely when the operator is mounted on right side only.
To insure smooth operation of the disconnect chain
assembly when mounted motor side down, reconfigure as
described below and as shown in figures 2 and 3.
1. Disconnect the key ring from the release cable.
2. Thread the release cable through the slot on the
outermost edge of the support bracket, as shown in Figure
2.
3. Re-attach the key ring and sash chain to the end of the
loop of release cable.
HOUR GLASS
CABLE SLEEVE
RELEASE
CABLE
SLOT
SUPPORT
BRACKET
KEY RING
SASH CHAIN
FIGURE 1
LGJ Operators are assembled at the factory to be installed in a right hand (motor side up) configuration. To install an
LGJ Operator on the left hand side of your door (motor side down), complete the three steps described below.
2. Set Limit Switch Direction
Locate Switch #1 on PCB in the electrical box. Place
pole #2 of Switch #1 in the “OFF” position. With this
setting limit switch labeled “A” is the close switch, limit
switch labeled “B” is the open switch.
IMPORTANT: Refer to page 9 for for complete
instructions on setting of limit switches.
3. Affix Electrical Box Cover Caution Label
Place the caution label on electrical box cover such that
the text is read in the opposite direction of silkscreen.
Disconnect Cable as shipped from the factory
Remove the three cotter pins from the disconnect shaft.
Do not discard the pins. Slide the disconnect shaft out
of the support bracket. The release lever will now be
free inside the motor frame. Remove the release lever
and sash chain from the motor frame. Slide the
disconnect hub, compression spring, and flatwasher
from the end of the gear reducer shaft. Remove the
disconnect support bracket by first removing the the two
gear reducer housing screws. Replace the screws in the
gear reducer and firmly tighten. 2. Re-assemble Disconnect Assembly
Remove the two screws on the opposite side of the gear
reducer and mount the disconnect support bracket with
the notched side facing the motor. For the remainder of
the installation, follow the steps outlined above in
reverse order, referring to the illustration as necessary.