Xylem 45HB-70HB Manual De Instalación, Funcionamiento Y Mantenimiento página 2

GENERAL INFORMATION GENERAL INFORMATION
Models 45HB and 70HB are multi-stage, high-pressure,
general-purpose centrifugal booster pumps, using en-
closed impellers. Applicable for clear, non-hazardous
liquids in general industrial services up to 180°F (82°C).
Particularly suited for high-pressure booster services.
All models are close-coupled to electric motors contain-
ing prelubricated bearings designed for continuous ser-
vice. Threaded shaft extension is protected by a stainless
steel sleeve/coupling combination.
All models are equipped with single, unbalanced mechan-
ical shaft seals.
Units are shipped completely assembled and ready for
installation.
IMPORTANT IMPORTANT
1. Inspect unit for shipping damage.
2. Read all instructions carefully.
3. ALWAYS disconnect all electrical power when han-
dling pump, motor, or controls.
4. Do not run unit dry or against a closed discharge.
This will result in damage to mechanical seal and
pump.
5. Never pump hazardous liquids or solvents.
6. Maximum liquid temperature: 180°F (82°C).
7. Maximum inlet pressure: 100 PSI.
INSTALLATION INSTALLATION
Location: Locate pump as near the liquid source as prac-
tical. Allow adequate room for servicing and ventilation.
Protect the unit from cold weather freezing and water
damage due to rain or flooding. Pump may be mounted
horizontal; or vertical with motor on top provided a
drip-shield is used for motor protection.
Foundation: Foundation surface must be flat so there is
no distortion and/or strain developed when tightening
the foundation bolts. CAUTION: Bolting and/or piping
must not put strain on liquid end. The pumps are quiet
and smooth running, but rubber mounting is recom-
mended on foundations susceptible to sound effect.
Alignment: No filed alignment is necessary as pumps are
close-coupled.
Piping: Suction pipe must be at least equal in size to
suction connection of pump and provide positive suc-
tion head (intake pressure) to the pump. Avoid using the
pump for applications requiring suction lift. Never use a
gate valve in the suction line to throttle the pump. CAU-
TION: Piping must not put strain on the liquid end.
Wiring: Electrical power supply must be a separate
branch circuit equipped with proper starters, fuses or
circuit breakers, wire size, etc., conforming to National
Electrical Code plus local codes. Power supply voltage,
phase and controls must match motor nameplate require-
ments. Low voltage and phase-loss (3 phase) protection is
recommended.
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Motors: Single-phase 3 HP motors are dual voltage
115/230 volts, 60 Hz, A.C. Single-phase 5 HP motors are
230 volts, 60 Hz, A.C. All other motors are three-phase,
dual voltage 230/460 volts, 60 Hz, A.C. The higher volt-
ages are recommended where available.
Rotation: Three-phase rotation must be checked at instal-
lation my momentarily energizing the completely filled
pump and observing the rotation. Rotation is clockwise
looking into the motor shaft, end-bell side (remove pro-
tective cap to observe shaft). Rotation must correspond
to rotation arrow. Rotation of three-phase units can be
reversed by interchanging any two (2) electrical power
leads. CAUTION: Do Not run in reverse rotation or
damage will result.
OPERATION
OPERATION
Fill suction line and pump with liquid to be pumped to
insure mechanical seal will not run dry. With pump and
suction line completely filled, and motor properly wired,
the unit may be started. Be sure pump is not started
against a closed valve in the discharge line.
MAINTENANCE MAINTENANCE
1. Lubrication
Pumps should require no maintenance other than the
motor bearings: In hot or severe service, lubricate
every 3 months. Follow motor manufacturer's instruc-
tions to determine lubrication schedule. Lubricate with
power off and motor warm. Remove upper and lower
plugs at both bearing. Free lower relief hole of hard
grease. Install clean grease-fitting on upper hole and
add grease with a low-pressure grease gun. Run motor
30 minutes. Stop motor and remove drained grease.
Replace all plugs. CAUTION: Do Not over-grease.
DISASSEMBLY DISASSEMBLY
1. Turn off all electrical power.
2. Drain system.
3. Disconnect piping.
4. Remove bolts holding motor to foundation.
5. Remove shaft snap ring (1) within discharge head (2).
6. Use a torch on both ends of casing to break-down
thread sealant at casing threads.
7. Use wrenches on suction housing (21) and discharge
head (2) to unscrew (counter-clockwise) discharge
head and casing. Casing is threaded inside each end
and sealed with thread sealant. The casing may come
off with the discharge head or stay on the suction
housing. If the casing remains on the suction housing
it may be removed with a strap wrench. CAUTION:
Do Not use a pipe wrench on the casing or dam-
age will result. The unbroken thread sealant may be
removed by applying heat with a torch.
8. Remove shaft sleeve (4) from shaft.
9. Stages, each consisting of a bowl, impeller, and dif-
fuser, can now be removed.