Xylem 8100 Series Centrifugal Pumps AC2515 REV.C - Manual (Page 8)

The foundation should be poured without
interruption to within 1/2 to 1 ½ 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.
8
Foundation bolts should be set in concrete as
shown in Figure 8. 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.
FIGURE 8 – FOUNDATION
BASE PLATE SETTING (BEFORE PIPING)
NOTE: This procedure assumes that a concrete
foundation has been prepared with anchor or hold
down bolts extending up ready to receive unit. It
must be understood that pump and motor have
been mounted and rough aligned at the factory. If
motor is to be field mounted, consult factory for
recommendations. AC Fire Pump CANNOT assume
responsibility for final alignment.
FIGURE 9A – SETTING BASE PLATE AND
GROUTING YEAR 2000 STYLE BASE FOR
BOTH MOTOR AND ENGINE DRIVEN UNITS
BASEPLATE
SHIMS
GROUT
FORM
BOLT
SLEEVE
ANCHOR BOLT
PIPE SLEEVE
FOUNDATION
BOLT
BUILT-UP
CONCRETE FOUNDATION
GROUT ONLY
TO TOP OF
BASE RAIL. ALLOW 1” FOR SHIMS.
PLACE ON BOTH SIDES
OF ANCHOR BOLTS.
( OPTIONAL )
CONCRETE
FIGURE 9B – GROUTING PRE-YEAR 2000
STYLE BASE FOR MOTOR DRIVEN UNITS
a. Use blocks and shims under base for
support at anchor bolts and midway
between bolts, to position base
approximately 1" above the concrete
foundation, with studs extending through
holes in the base plate.
WASHER
b. By adding or removing shims under the
base, level and plumb the pump shaft and
flanges. The base plate does not have to
be level.
c. Draw anchor nuts tight against base, and
observe pump and motor shafts or
coupling hubs for alignment. (Temporarily
remove coupling guard for checking
alignment.)
d. If alignment needs improvement, add
shims or wedges at appropriate positions
under base, so that retightening of anchor
nuts will shift shafts into closer alignment.
Repeat this procedure until a reasonable
alignment is reached.
NOTE:
TO KEEP SHIMS IN
PLACE ALLOW GROUT
TO FLOW AROUND
HOLD DOWN LUGS.
PUMP
BASE RAIL
CONCRETE
FOUNDATION
GROUT
LEVELING OF PUMP BASE ON
CONCRETE FOUNDATION.
NOTE: Reasonable alignment is defined as
that which is mutually agree upon by pump
contractor and the accepting facility (final
operator). Final alignment procedures are
covered under “Alignment Procedures.”
e. Check to make sure the piping can be
aligned to the pump flanges without
placing pipe strain on either flange.
f. Pour grout in the base plate completely
(See “Grouting Procedure”) and allow
grout to dry thoroughly before attaching