Instruction 2111.80B 04/05 5
SECTION II. INSTALLATION A. PUMP
A. PUMP
1. LOCATION
The following factors must be considered in selecting a location for the pump(s):
a. The pump should be installed as near the liquid to be pumped as possible, with the shortest and most
direct suction piping arrangement. The total dynamic suction lift (static elevation plus losses through suction
pipe and fittings) should not exceed 15 feet.
b. The pump should be located in a position such that the highest point of the casing is below the
minimum
level of liquid to be pumped. This condition is referred to as submerged suction.
c. Select a dry place.
d. Select a location that has ample floor space for inspection and repairs.
e. Provide ample floor drains at the pumping unit. For dry pit applications, the use of an automatic sump pump is
strongly recommended.
f. NPSH Available must be greater than NPSH Required at all operating points.
2. FOUNDATION
A foundation should consist of a flat, level, substantial surface to provide a permanent, rigid support for the
pump base. The foundation must also be solid enough to absorb any normal amount of vibration which may
occur. The natural frequency of the support structure must be no less than twice the pump excitation frequency.
If a raised foundation is desired, it should be at least six inches greater in length and width than the base of the
pump support, and at least deep enough to provide proper embedment for the anchors. A raised foundation
should never be superficially poured over a smooth concrete floor, but should be rooted by one of the following
means: (a) When the concrete is newly poured, cast a shallow depression in the floor using a box form, (b) leave
reinforcement bars protruding above floor level, or (c) gouge out holes in an existing concrete floor.
3. ANCHOR BOLTS
Anchor bolts should be set in pipe sleeves two and one half times larger in diameter than the recommended
bolts. The bolts must be accurately placed to correspond with bolt holes in the pump base, as indicated on
the dimensional installation drawing. Figure I illustrates the generally accepted method of anchorage. This
system traps the bolt for anchorage and allows the bolt to move within the sleeve for alignment purposes. The
bolts should be fastened to a template form, usually made of wood, and spaced to conform accurately with
pump base anchor bolt holes. The form must be carefully located so that the pump will stand exactly in its specified
position with relation to elevation, shaft plumb and pipe connections. The concrete can then be poured.
Before fixing anchor bolts into the form, the top and bottom of the sleeves should be plugged with oakum, as
shown. Check that sleeves are held rigidly against square plate, which will permit slight adjustment of the bolts
after the concrete has set. This will prevent strains or difficulties arising from slight dimensional
discrepancies.
4. SETTING
A. PUMP
Set pump on the foundation over the anchor bolts, but do not tighten down bolts. Raise the pump unit 1"
and carefully level for grouting by driving wedges under the pump support or base plate. To level vertical
units, place a level on face of pump coupling half and face of discharge flange, and shim the unit as
required. Check horizontal units at the suction flange, pump and motor half coupling, and on the base plate
near the pump and near the motor.
B. MOTOR SUPPORT
Set the motor support over the floor hole; position the universal shafting to the motor coupling, setting the
motor assembly so that it is level and the shafting alignment below can be maintained per
UNIVERSAL JOINT / INDUSTRIAL INTERMEDIATE SHAFTING, page 8. After installation of
shafting in accordance with those instructions, the unit may be bolted down.
5. ALIGNMENT
A. VERTICAL
On pedestal mounted pumps, the motor supports are indexed (top & bottom) to maintain factory alignment.
Coupling alignment should be checked in accordance with the guidelines on page 7 prior to final
installation. Refer to flexible shafting instructions, page 8, to determine proper alignment for shaft driven
units.
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