Xylem 8200 Series Base Mounted Centrifugal Fire Pumps AC2675 REV.C - Manual (Page 7)

“Foundation,” “Base Plate Setting,” “Grouting
Procedure,” “Alignment Procedure” and
“Doweling.”
TEMPORARY STORAGE
If the pump is not to be installed and operated
soon after arrival, store it in a clean, dry place
having slow, moderate changes in ambient
temperature. Rotate the shaft periodically to coat
the bearings with lubricant and to retard oxidation,
corrosion, and to reduce the possibility of false
brinelling of the bearings.
LOCATION
The pump should be installed as near the suction
supply as possible, but no less than five suction
diameters (refer to page 14, suction and discharge
piping section) with the shortest and most direct
suction pipe practical. The total dynamic suction
lift (static lift plus friction losses in suction line)
should not exceed the limits for which the pump
was sold.
The pump must be primed before starting.
Whenever possible, the pump should be located
below the fluid level to facilitate priming and
assure a steady flow of liquid. This condition
provides a positive suction head on the pump. It is
also possible to prime the pump by pressurizing
the suction vessel.
7
When installing the pump, consider its location in
relation to the system to assure that sufficient Net
Positive Suction Head (NPSH) at pump suction is
provided. Available NPSH must always equal or
exceed the required NPSH of the pump.
The pump should be installed with sufficient
accessibility for inspection and maintenance. A
clear space with ample head room should be
allowed for the use of an overhead crane or hoist
sufficiently strong to lift the unit.
NOTE: Allow sufficient space to be able to
dismantle pump without disturbing the pump inlet
and discharge piping.
Select a dry place above the floor level wherever
possible. Take care to prevent pump from freezing
during cold weather when not in operation. Should
the possibility of freezing exist during a shut-down
period, the pump should be completely drained,
and all passages and pockets where liquid might
collect should be blown out with compressed air.
Make sure there is a suitable power source
available for the pump driver. If motor driven,
electrical characteristics should be identical to
those shown on motor data plate.
FOUNDATION
A substantial foundation and footing should be
built to suit local conditions. The foundation must
be substantial enough to absorb vibration.
(Hydraulic Institute Standards recommends the
foundation weigh at least five (5) times the weight
of the pump unit.) It must form a permanent and
rigid support for the baseplate. This is important in
maintaining the alignment of the flexibly coupled
unit.
The foundation should be poured without
interruption to within 1/2 to 1-1/2 inches of the
finished height. The top surface of the foundation
should be well scored and grooved before the
concrete sets; this provides a bonding surface for
the grout.
Foundation bolts should be set in concrete as
shown in Figure 5. An optional 4-inch long tube
around the bolts at the top of the concrete will
allow some flexibility in bolt alignment to match the
holes in the base plate. Allow enough bolt length
for grout, shims, lower base plate flange, nuts and
washers. The foundation should be allowed to
cure for several days before the base plate is
shimmed and grouted.
FOUNDATION
BOLT
PIPE SLEEVE
(OPTIONAL)
WASHER
BUILT-UP CONCRETE
FOUNDATION
FIGURE 5 – FOUNDATION