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VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG
CENTER LINE OF
GAS COMPRESSION
SYSTEM
6"
# 6 @ 12"
EACH WAY
TOP & BOTTOM
COMPRESSOR UNIT
G.A.
G.A.
EL. TOP OF
GRADE
EXCAVATE TO FROST DEPTH AS REQ'D AND BACKFILL
WITH CLSM OR NON-FROST SUSCEPTIBLE FILL
Figure 3-3. Concrete Pad with Compressor Unit Dimensions - Front View
CONCRETE
SLAB IN
BUILDING
CHAMFER EDGE
COMPRESSOR UNIT
FOUNDATION
ISOLATION JOINT,
1" MINIMUM
THICKNESS
6”
Figure 3-4. Interior Foundation Isolation
Leveling and Grouting
The unit should be level in all directions. Wet the
concrete pad according to the grout manufacturer’s
directions. Mix a suffi cient amount of grout. The grout
must be an expanding grout rather than shrinking to
provide a tighter bond. Follow the manufacturer’s
recommendations for setting, precautions, mixing, and
grout placement, fi nishing and curing. The grout must
be worked under all areas of the feet with no bubbles or
voids. If the grout is settled with a slight outside slope,
oil and water can run off of the base. Once the grout has
cured, torque the anchor bolts as per HILTI instructions.
Section 3 • Installation