11
Figure 5. Recommended dimensions for the concrete footing and
foundation plate, side view
After the concrete is poured in the form and before it
has a chance to set, insert the foundation plate into the
cement and position it so that it is flush with the top of
the concrete and is level.
Allow the concrete to set a minimum of two full days
before you install the drive unit on top of it.
Install the Power Unit
Figure 6 shows important dimensions and parts of the
vinyl power unit box.
There are two constraints to installing the power unit
box for the 750 Operator.
1. We recommend that you install the power
unit box so that the hydraulic lines between it
and the drive unit are no longer than 20 ft (6
m).
2. The power unit itself must be installed so that
the vent screw in on the top of the unit as
shown in Figure 6.
The power unit box that ships with your operator hinges
on the left, but you can reverse the opening direction of
the door if necessary for your installation. To reverse
the opening direction, open the cover, and then lift it off
the box. The vinyl hinges can now be placed in the
hinge receptacles on the right-hand side. Secure the
hinges with the screws provided.
You may surface mount the power unit box to a vertical
surface or you may recess it.
To mount the power unit box use the 3/16-in. holes
provided (relocating the holes in the box will
compromise its integrity).
If you recess the box, keep in mind that hydraulic hoses
and electrical wiring need to enter the bottom of the
box.
Also, recesseing must not interfere with the hinge
assembly of the power unit box. You need to keep in
mind the following dimensions.
Height: 14 1/4 in. (36.2 cm)
Width: 10 in. (25.5 cm)
Depth:
maximum
of 2
1
/
2
in. (6.5 cm)
At this time, you also need to remove the vent screw
located on the power unit. The vent screw is in the
middle of the top, left side of the power unit as shown
in Figure 6.
Caution
: Failure to remove the vent screw in
the power unit may result in erratic operation
of the 750 Operator.
6
1
Lock for triangular key
2
Clip to hold instruction
manual
3
1 1/16 in. (3 cm) holes
for hydraulic lines
4
1 1/16. in (3 cm)
knock-outs
5
Three knock-outs,
each measuring
3/4 in. (2 cm)
6
Electrical junction box
Figure 6. Parts of the power unit in the vinyl box