3 – 6
Section 3 • Installation
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD
• Ensure the foundation rests entirely on natural rock
or entirely on solid earth, but never on a combination
of both
• Check the ability of the soil to carry the load
• Check wet season and dry season soil characteristics
for static loading limits and elasticity
• Check local codes for Seismic Design requirements
For examples of foundation diagrams, see to Figure 3-2
and Figure 3-3.
NOTE
In Figures 3-3 and 3-8, the recommended
housekeeping height of 6” is to allow maintenance/
service of the oil strainer and oil pump.
Once the site has been excavated and prepared, place
four inches of sand down on the bed where the founda-
tion will rest. The sand must be compacted before plac-
ing the forms and rebar. After the sand is compacted,
use the Vilter
TM
GA drawing to construct the forms for
the foundation. With forms in place, install expansion
boards on the inside of the forms, for example, see
Figure 3-4. Next, place your rebar in the forms as per the
CENTER LINE OF
GAS COMPRESSION
SYSTEM
EL. TOP OF
GRADE
# 6 @ 12"
EACH WAY
TOP & BOTTOM
3" CLR. 2" CLR.
1'-0"
6"
COMPRESSOR UNIT
2" (TYP.)
2" (TYP.)
G.A.
G.A.
EXCAVATE TO FROST DEPTH AS REQ'D AND BACKFILL
WITH CLSM OR NON-FROST SUSCEPTIBLE FILL
4" COMPACTED
SAND
G.A.
CLEARANCE FOR
REPLACING
ELEMENTS
Figure 3-2. Concrete Pad with Compressor Unit Dimensions - Side View
Vilter
TM
foundation drawing. When all rebars are in place
the concrete can be poured. The concrete must then be
trolled level and a surface texture etched in place. Leave
the concrete to cure for at least 28 days.
Compressor Unit Installation
Once the foundation has cured, the compressor unit can
be placed on the foundation, see Figure 3-5 and Figure
3-6. With the appropriate material handling equipment,
lift the compressor unit by locations shown on the Vil-
ter
TM
GA drawing and slowly place it on the foundation
housekeeping piers. As per the Vilter
TM
GA drawing, en-
sure the compressor unit is correctly placed on the foun-
dation. Once placed, use the spherical washers directly
under the compressor as the surface to level the com-
pressor unit, see Figure 3-7. Place shims under the feet
of the compressor unit, as needed, until it is leveled, see
Figure 3-8. Select the correct drill bit and drill thru the
anchor bolt hole in the mounting feet of the compressor
unit to the depth called for on the Vilter
TM
foundation
drawing. Finally using the HILTI instructions, put your
anchor bolts in place and wait for them to cure. Then
place the nuts on the anchor bolts to nger tight and
prepare to grout.
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