Xylem AC2008B Series HSC3 Base Mounted Centrifugal Pump - Manual (Page 5)

INTRODUCTION
1. Purpose of Manual
This manual is furnished to acquaint you with some of the
practical ways to install, operate, and maintain this pump.
Read it completely before doing any work on your unit and
keep it handy for future reference.
Equipment cannot operate well without proper care. To keep
this unit at top efficiency, follow the recommended installation
and servicing procedures outlined in this manual.
2. Warranty
Refer to your local representative for warranty coverage.
3. Pump Identification
All pumps are designated by Serial Number, Model Number,
and Size. This information is stamped on an identification
plate which is mounted on the pump. Refer to pump identifi-
cation in specific instruction section of this manual for detailed
information.
4. Receiving Pump
Check pump for shortages and damage immediately upon
arrival. (An absolute must.) Prompt reporting to the carrier’s
agent with notations made on the freight bill, will expedite
satisfactory adjustment by the carrier.
Pumps and drivers normally are shipped from the factory
mounted and painted with primer and one finish coat.
Couplings may be either completely assembled or have the
coupling hubs mounted on the shafts and the connecting
members removed. When the connecting members are
removed, they will be packaged in a separate container and
shipped with the pump or attached to the base plate.
Shafts are in alignment when the unit is shipped; however, due
to shipping, the pumps may arrive misaligned and, therefore,
alignment must be established during installation. Bell &
Gossett has determined that proper and correct alignment can
only be made by accepted erection practices. Refer to the fol-
lowing paragraphs on “Foundation,” “Base Plate Setting,”
“Grouting Procedure,” “Alignment Procedure” and “Doweling.”
5. 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.
6. Location
The pump should be installed as near the suction supply as
possible, but no less than five suction diameters (refer to page
9, 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 pro-
vides a positive suction head on the pump. It may also be
possible to prime the pump by pressurizing the suction vessel.
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 col-
lect 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.
7. Foundation
A substantial foundation and footing should be built to suit
local conditions. It should form a rigid support to maintain
alignment. The pump assembly must be mounted to a suitable
foundation having a mass ≥ 1.5 times the weight of the 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.
5
General HSC 3 Instructions