Xylem 8200 Series Base Mounted Centrifugal Fire Pumps AC2675 REV.C - Manual (Page 8)

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 Systems
cannot assume responsibility for final alignment.
8
FIGURE 6 – SETTING BASE PLATE AND
GROUTING
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.
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: Reasonable alignment is defined as that
which is mutually agreed 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. Grout in base plate completely (See
“Grouting Procedure”) and allow grout to
dry thoroughly before attaching piping to
pump. (24 hours is sufficient time with
approved grouting procedure.)
GROUTING PROCEDURE
Grout compensates for uneven foundation,
distributes weight of unit, and prevents shifting.
Use an approved, non-shrinking grout, after
setting and leveling unit (See Figure 6).
NOTE:
TO KEEP SHIMS IN
PLACE ALLOW GROUT
TO FLOW AROUND
HOLD DOWN LUGS.
ALLOW 1" FOR
SHIMS. PLACE ON
BOTH SIDES OF
ANCHOR BOLTS.
GROUT ONLY TO
TOP OF BASE RAIL.
a. Build strong form around the foundation to
contain grout.
PUMP BASE
RAIL
b. Soak top of concrete foundation
thoroughly, then remove surface water.
GROUT
c. Base plate should be completely filled with
grout.
APPROX. 1" GAP
d. After the grout has thoroughly hardened,
check the foundation bolts and tighten if
necessary.
CONCRETE
FOUNDATION
LEVELING OF PUMP BASE
ON CONCRETE FOUNDATION.
e. Check the alignment after the foundation
bolts are tightened.
f. Approximately 14 days after the grout has
been poured or when the grout has
thoroughly dried, apply an oil base paint to
the exposed edges of the grout to prevent
air and moisture from coming in contact
with the grout.
SEE ANSI/OSHA COUPLER GUARD
REMOVAL/INSTALLATION
(SEE BELOW)
ALIGNMENT PROCEDURE
NOTE: A flexible coupling will only compensate for
small amounts of misalignment. Permissible
misalignment will vary with the make of coupling.
Consult coupling manufacturer’s data when in
doubt.
Allowances are to be made for thermal expansion
during cold alignment, so that the coupling will be
aligned at operating temperature. In all cases, a
coupling must be in alignment for continuous
operation. Even though the coupling may be
lubricated, misalignment causes excessive wear,
vibration, and bearing loads that result in
premature bearing failure and ultimate seizing of
the pump. Misalignment can be angular, parallel,
or a combination of these, and in the horizontal