Xylem AC8584C Series HSCS Base Mounted Centrifugal Pumps - Manual (Page 5)

5
INTRODUCTION
1. Purpose of Manual
This manual is fur nished 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. W arranty
Refer to your local r epresentative for warranty coverage.
3. Pump Identification
All pumps ar e designated by Serial Number, Model Number,
and Size. This information is stamped on an identification
plate which is mounted on the pump.
4. Installation
5. 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.”
6. T emporary 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.
7. 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 is also 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 suf ficient 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.
8. 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 recom-
mends 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 align-
ment of the coupled unit.
General HSCS Instructions
IMPOR TANT
Do not install and operate Bell & Gossett Pumps, 3D Valves,
Suction Diffusers, etc., in closed systems unless the system
is constructed with properly sized safety devices and con-
trol devices. Such devices include the use of properly sized
and located pressure relief valves, compression tanks, pres-
sure controls, temperature controls, and flow controls as
appropriate. If the system does not include these devices,
consult the responsible engineer or architect before making
pumps operational.
COMPRESSION T ANK
SHOULD BE LOCATED
ON THE SUCTION SIDE
OF THE PUMP
B&G REDUCING
VALVE
COLD
WATER
SUPPLY
FROM BOILER
CHILLER OR CONVER
TER
B&G ROLAIRTROL
AIR SEPARATOR
SUPPLY
TO SYSTEM
ISOLATION
VALVE
B&G CIRCUIT
SETTER
B&G TRIPLE DUTY
VALVE
B&G
SUCTION
DIFFUSER