10
After the concrete is poured in the forms and before it
has a chance to set, insert the foundation plate into the
cement and position it flush with the top of the concrete
and aligned with the top of the lower gate frame. Use
the dimensions shown in Figure 4 to align your
foundation plate. Allow the concrete to set for a
minimum
of two days before installing the operator.
Mounting the Operator
Before you mount the 844 Operator on the foundation
plate, you must prepare the operator for installation.
First, using the cover key (see Figure 5) unlock the
cover of the 844 Operator and open the cover (see
Figure 6).
Once the cover of the operator is opened, remove the oil
filler cap (see Fig. 1) with a screw driver (pry the cap up
and off) so that you can check the oil level. The oil
should be just slightly above the silver armature plate,
located below the copper motor windings as viewed
through the oil filler hole.
Next, on the pinion or sprocket side of the operator
(depending on the model you ordered), find the vent
screw where the cover meets the body of the operator.
Remove the vent screw. Be sure to save the vent screw
for possible future use because the screw should be
installed if you transport the operator.
Now you are ready to mount the 844 Operator on its
foundation plate. Follow the instructions below that
apply to the version of the operator you are installing.
Figure 5. Use the cover key to unlock the cover
of the 844 Operator
Figure 6. Lift and tilt the cover backward on the
844 Operator
Chain Operator
As shown in Figure 7, place the operator on the
foundation plate with the sprocket facing the gate.
There should be approximately 1 3/8 in. (3.6 cm)
between the centerline that runs through the sprocket
(and along the gate leaf) and the inside edge of the gate
frame (see Figure 7[b]).
Secure the gate chain brackets to the vertical front and
back posts of the gate leaf using the
U
bolts provided.
Set the height of the gate chain brackets so that the
center of the idler sprockets (located on either side of
the drive sprocket) is even with the center line of the
brackets. This alignment compensates for any sag in the
chain.
Place the chain over the top of the idler sprockets and
under the drive sprocket (see Figure 8).
Rack and Pinion Operator
Mounting the Pinion:
As shown in Figure 7, place the
operator on the foundation plate with the pinion facing
the gate with approximately 1 3/8 in. (3.6 cm) between
the inside edge of the gate frame and the surface of the
limit switch sensor.
Fit one 1/16-in. (1.5 mm) thick sheet-metal shim under
each mounting bracket in order to keep the operator
slightly raised. These shims are setting the height of the
rack and will be removed later to provide operating
clearance between the rack and the pinion. Spot weld
the factory-fitted mounting brackets to the foundation
plate. (You will remove these spot welds later, so do not
over weld.)
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