Xylem IM012 R05 Model NPO - Manual (Page 4)

4
WARNING
Hazardous voltage
can shock, burn or
cause death.
Extreme heat can
cause personal injury
or property damage.
WARNING
WIRING AND GROUNDING
Install, ground and wire ac-
cording to local and National
Electrical Code requirements.
Install an all leg disconnect
switch near the pump.
Disconnect and lockout electri-
cal power before installing or
servicing pump.
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
maintenance.
FAILURE TO PERMANENTLY
GROUND THE PUMP, MOTOR AND
CONTROLS BEFORE CONNECTING
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
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.
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
LOCKOUT ELECTRICAL POWER
BEFORE ATTEMPTING ANY
MAINTENANCE CAN CAUSE
SHOCK, BURNS OR DEATH.
CASING MAY CONTAIN
HAZARDOUS FLUIDS THAT CAN
CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE.
Containing pumpage as required,
remove pump casing vent and drain
plugs (408). Remove and discard the
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 to
the seal. Seal replacement is recommend-
ed 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.
If necessary, remove the four motor hex bolts (371) and
CAREFULLY slide the motor adapter from the shaft.
Replace the motor assembly and deflector (123), as
required.
Disassembly is complete.
WARNING
Hazardous
voltage
Hazardous fluids can
cause personal injury
or property damage.
WARNING
WARNING
Hazardous
voltage
CAUTION