Wiring And Grounding; Operation; Maintenance; Disassembly - Xylem GOULDS NPO Manual De Instrucciones

PIPING – DISCHARGE
Install a check valve suitable to handle the flow, liquids
and to prevent backflow. After the check valve, install an
appropriately sized gate valve to be used to regulate the
pump capacity, pump inspection and for maintenance.
When required, the pipe increaser should be installed
between the check valve and the pump discharge.

WIRING AND GROUNDING

Install, ground and wire accord-
WARNING
ing to local and National Electri-
cal Code requirements.
Install an all leg disconnect
switch near the pump.
Disconnect and lockout electri-
Hazardous voltage
cal power before installing or
can shock, burn or
servicing pump.
cause death.
Electrical supply MUST match pump's nameplate
specifications. Incorrect voltage can cause fire,
damage to the motor and voids warranty.
Motors equipped with automatic thermal protec-
tion open the motor's electrical circuit when a
thermal overload exists. This can cause the pump
to start unexpectedly and without warning.
Use only stranded copper wire to motor and ground. The
ground wire MUST be at a least as large as the wire to the
motor. Wires should be color coded for ease of mainte-
nance.
FAILURE TO PERMANENTLY
WARNING
GROUND THE PUMP, MOTOR AND
Hazardous
CONTROLS BEFORE CONNECTING
voltage
TO ELECTRICAL POWER CAN CAUSE
SHOCK, BURNS OR DEATH.
NOTICE: UNIT ROTATION IS CLOCKWISE, WHEN
VIEWED FROM THE MOTOR END.
INCORRECT ROTATION MAY CAUSE
DAMAGE TO THE PUMP AND VOIDS THE
WARRANTY.

OPERATION

NOTICE: PUMP MUST BE FULLY PRIMED
BEFORE OPERATION.
OPERATION AT OR NEAR ZERO
WARNING
FLOW CAN CAUSE EXTREME HEAT,
PERSONAL INJURY OR PROPERTY
DAMAGE.
After stabilizing the system at normal
operating conditions, check the piping.
If necessary adjust the pipe supports.
Extreme heat can
cause personal injury
or property damage.
4

MAINTENANCE

Motors have permanently lubricated bearings. No lubri-
cation is possible or necessary. Follow the motor manu-
facturer's recommendations for maintenance.

DISASSEMBLY

FAILURE TO DISCONNECT AND
WARNING
LOCKOUT ELECTRICAL POWER
Hazardous
BEFORE ATTEMPTING ANY
voltage
MAINTENANCE CAN CAUSE SHOCK,
BURNS OR DEATH.
CASING MAY CONTAIN
WARNING
HAZARDOUS FLUIDS THAT CAN
CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE.
Containing pumpage as required,
remove pump casing vent and drain
Hazardous fluids can
plugs (408). Remove and discard the
cause personal injury
or property damage.
respective plug O-rings. Drain and flush
system, as required.
Remove the four motor bolts from the motor base or
foundation.
Remove the eight casing cap screws (370), then using the
slots provided about the casing (100), pry the back pull-
out assembly from the casing.
Remove and discard the casing O-ring (513) and the
internal casing O-ring (349).
NOTICE: IMPELLER COMPRESSES THE MECHANICAL
SEAL SPRING – BE PREPARED FOR THE
IMPELLER TO SPRING FROM SHAFT WHEN
IMPELLER IS REMOVED.
Remove the end cap from the motor, exposing a slot in
the end of the motor shaft. While holding the shaft from
rotation with a screwdriver, remove the impeller locknut
(304) (if present) by turning it COUNTERCLOCKWISE.
Remove impeller (101) by turning counterclockwise
when looking at the front of the pump. Protect hand with
rag or glove. Apply localized heat for 1-2 minutes or to an
approximate temperature of 250º C. Disassemble while
hot. Heating will decrease the break-loose torque of the
Loctite 243 and allow for easy removal.
Excessive heating may cause damage
CAUTION
to the seal. Seal replacement is recom-
mended if pump is disassembled or repaired.
Using two pry bars, 180º apart, CAREFULLY separate the
seal housing (184) from the motor adapter (108). The
mechanical seal (383) rotary assembly will slide from the
motor shaft with the seal housing.
CAREFULLY push out the mechanical seal stationary
seat from the seal housing. Inspect and wipe clean the
stationary seat bore. Replace as necessary. DISCARD the
mechanical seal assembly.