Making Final Adjustments - Extron electronics HSA 822MS Installation And Maintenance Manual

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Installation, cont'd
4.
Firmly hold the top plate in position and drill pilot holes,
each 3/32" in diameter by 1/4" deep, at each of the top
plate's four screw holes (figure 2-9).
Wear safety glasses when operating the drill.
Failure to heed this warning can result in eye injury.
Figure 2-9 — Drilling pilot holes
5.
Using the four provided #6 x 1/2" Philips flathead screws,
secure the top plate to the surface block.
6.
Using the four 1/4" nuts that you removed in Preparing the
HSA, step 10, secure the top plate to the lifting plate
(figure 2-10). Leave the nuts slightly loosened for
adjustment.
The surface block can fit either of two ways. For surfaces
with a grain pattern, check that the pattern of the surface
block is the best match for the grain pattern of the table
surface. If necessary, reverse the direction of the block.
Figure 2-10 — Securing the surface block and top plate
to the lifting plate
2-10
HSA 822MS • Installation

Making Final Adjustments

1.
On the 10-pin control and status captive
screw connector on the underside of the
HSA, use a piece of wire to temporarily
jumper pin 4 to pin 5 to enable the manual activation
(press to activate) operation of the HSA.
2.
With the unit unpowered, gently press on the surface
block to retract (close) the unit. The surface block should
fit snugly within the cut-out hole.
If the surface block impacts the sides of the hole, adjust
the positioning of the HSA and the surface block. With the
installation screws and nuts left slightly loosened, the HSA
and/or the surface block should be able to be moved
enough for the surface block to fit snugly. Leave the
installation screws and nuts left slightly loosened.
Connect the enclosure to the appropriate power source:
2.
125 VAC, 60 Hz, 5 A (US domestic version)
220-240 V, 50/60 Hz, 5 A (international versions)
The HSA moves to its home (retracted) position, close to
flush with the table surface.
4.
Check that the surface block is horizontal, and not tipped
to one side or the other. If necessary, adjust the surface
block to be horizontal as follows:
a.
Slowly tighten the adjustment screw, on the under-
side of the top plate (figure 2-11), that is closest to the
lowest side of the surface block to raise that side.
Figure 2-11 — Location of level adjustment screws
HSA 822MS • Installation
2-11

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