Goulds Pumps VS - IOM - Manual (Page 15)

SECTION 5 – INSTALLING
THE PUMP
5-1 Check the pump and motor shaft to make
sure they turn free before installation. For some
models, it may be necessary to remove the suc-
tion screen in order to check the shaft. Be sure to
re-install the suction screen.
5-2 Raise the bowl/motor assembly with the ship-
ping skids still in place. Remove the shipping
skids, and lower assembly into the well, clamping
the bowl assembly near the top.
5-3 Attach the elevators to the bottom column
pipe immediately below the column coupling.
Hoist the column section into place above the well
and the top of the bowl assembly, providing a soft
board or pipe dolly for the end of the column pipe
to slide in on so that threads will not be damaged
while the section is being raised. Clean all
threads with thread lubricant. Thread the pipe into
the discharge bowl connection and make up tight,
using one set of chain tongs for back-up.
CAUTION
THE PUMP MOTOR WILL EXERT A TORQUE THAT
WILL TEND TO UNSCREW THREADED COLUMN
PIPE CONNECTIONS. FOR THIS REASON,
THREADED COLUMN JOINTS MUST BE TIGHT-
ENED. Following table gives the normal amount
of thread engagement necessary to make a tight
joint for the NPT thread joint:
Pipe size Length of thread (in.) No. of threads
3" 1" 8
4" 1-1/8" 9
5" 1-1/4" 10
6" 1-5/16" 10-1/2
8" 1-7/16" 11-1/2
10" 1-5/8" 13
5-4 Install a cable clamp on each side of the cable
splice. (See Figure 3.1.) Be careful not to dam-
age the cable. If an air line is to be installed, route
it beside the cable, making sure that it is not
pinched by the clamps. If there is any danger that
the splice will rub against the well casing during
installation, it should be protected by thick rubber
chaffing pads or by a steel shield. Check that the
grounding system is in place.
WARNING
FAILURE TO GROUND THE UNIT PROPERLY CAN
RESULT IN SERIOUS OR FATAL SHOCK. REFER
TO ELECTRICAL CODE REQUIREMENTS.
5-5 Slowly lower the unit into the well (or sump)
adding joints of column pipe as the unit is lowered.
Tighten each joint securely. See note above.
Remove slack from the power cable and attach a
cable clamp approximately every 20 feet. For
units with large heavy power cable, additional
cable clamp may be required to give additional
support. Line up the cable on one side of the
pump and maintain as much clearance as possi-
ble on that side when lowering the pump in the
well. BE EXTREMELY CAREFUL NOT TO
SCRAPE OR DAMAGE THE POWER CABLE,
CABLE SPLICE, OR GROUNDING SYSTEM
WHEN LOWERING THE PUMP. Hold the power
cable up away from the well casing as lowering
the pump into the casing.
5-6 If the pump does not have a built-in check
valve, a line check valve should be installed within
25 feet above the pump bowl assembly. For a
deep setting pump, a line check valve is recom-
mended for every 200 ft of column pipe. However,
no check valve should be installed above the
pumping level.
5-7 As soon as the splice joint is submerged in
the water, take a resistance reading between the
power cable conductors and ground to assure that
the insulation and the cable or the splice was not
damaged during installation.
5-8 After the last piece of column pipe has been
installed, install the well head. Install a cable
clamp between the last column pipe coupling and
the well head base. (See Fig. 3.1.) Route the
power cable and grounding system through the
large threaded hole in the head base. Route the
air line (if used) through one of the smaller thread-
ed holes in the head base. The remaining small
threaded hole is for connection of a well vent or
other accessories. All of these holes are threaded
with standard NPT or BSP pipe threads. If a gas-
ket is required between the head base and its
mounting surface, the gasket should be placed on
the foundation prior to installing the well head.
5-9 After the well head has been properly tight-
ened, carefully rotate the entire unit in the well
until the discharge flange is facing in the desired
direction. Push the unit to one side of the well,
providing the maximum clearance for the drop
cable when rotating the unit.
5-10 Slowly lower the well head onto its mount-
ing surface. BE CAREFUL NOT TO DAMAGE
THE GROUNDING SYSTEM OR PINCH THE
POWER CABLE BETWEEN THE SURFACE
7