Xylem IMDWT R02 Model DWT Deep Well Turbine Pumps - Manual (Page 11)

11
Never draw piping into place by forcing
the flange connections of the pump. Pipe
strain will adversely effect the operation of the pump
resulting in damaging the equipment and possible
physical injury.
1. All piping must be supported independently and
line up naturally with the pump flange so that
undue pipe strain is not imposed on the pump.
2. DO NOT connect piping to pump until grout has
hardened and pump hold-down bolts have been
tightened.
3. It is suggested that expansion loops or joints, if
used, be properly installed in discharge line. When
handling liquids at elevated temperatures expansion
joints are used, so linear expansion of piping will
not draw pumps out of alignment.
4. Carefully clean all pipe parts, valves and fittings,
and pump branches prior to assembly.
5. Isolation and check valves should be installed in
discharge line. Locate the check valve between
isolation valve and pump, this will permit inspection
of the check valve. The isolation valve is required
for regulation of flow, and for inspection and
maintenance of pump. The check valve prevents
pump or seal damage due to reverse flow through
the pump when the driver is turned off.
6. Increasers, if used, should be placed between pump
and check valves.
7. Cushioning devices should be used to protect the
pump from surges and water hammer if quick-
closing valves are installed in the system.
INSTALLING THE BoWL ASSEMBLY
Do not work under a heavy suspended
object unless there is positive support and
safe guards, which will protect personnel, should a hoist
or sling fail.
Do not attempt to lift bowl assembly
by the pump shaft. This can result in
damaging the pump shaft.
1. Prior to installing the bowl assembly, check that
all capscrews are tight. Turn the pump shaft by
hand and make sure it turns freely. Remove all
accumulated dust, oil or other foreign material from
the external surfaces.
2. If pump setting exceeds 200 ft., measure the
available bowl assembly lateral (shaft end play) by
pushing shaft toward suction bowl, mark shaft, pull
shaft out and mark again. Measure the distance
between the marks and record. This will later aid in
adjusting the final impeller position.
For pump setting over 200 ft. this measure must
complete before proceeding.
WARNING
3. Place two I-beam supports across the base plate
opening, strong enough to safely support the weight
of the entire pump assembly. These I-beams should
be connected by threaded rods and nuts so as to
clamp them firmly together for the portion to be
supported. (See Figure 5).
Figure 6
4. Place a suitable hoist or derrick over base plate
opening with the hook in the center.
5. If a suction strainer is provided, assemble it to
the suction bowl or to the end of suction pipe (if
provided).
6. Install suction pipe, if provided. Place an elevator
clamp just below the pipe threads. Attach a sling to
the clamp and to hoist hook. Hoist over the well.
Lower the suction pipe until clamp rests firmly on
the supporting timbers.
7. Place the elevator clamps just below the discharge
bowl. For flanged column install two threaded
eyebolts through the discharge bowl bolt holes 180º
apart for flanged column. For threaded discharge
utilize a lifting bail sized to handle the weight of the
bowl assembly and suction apparatus.
8. Attach a sling to the elevator clamps, eyebolts,
or lifting bail and hoist it into position over the
foundation opening. (See Figure 6).
9. If suction pipe is provided, lower the bowl assembly
until the bottom end of the suction bowl meets
the top end of the suction pipe. Screw the bowl
assembly onto the suction pipe.
10. Carefully lower bowl assembly, guiding the unit so
it does not strike the sides of the opening. Continue
to lower bowl assembly until the elevator clamps
or discharge bowl flange rests firmly on the I-beam
supports.
11. Place a cover over the discharge bowl opening to
prevent entrance of dirt or other foreign matter
until ready for installation of the column assembly.
Do not drop any foreign object into the
bowl assembly. Such an object can cause
serious damage to the pump and any downstream
components. Any foreign object dropped into the bowl
assembly must be retrieved prior to continuing assembly.
WARNING
CAUTION
CAUTION