Publicidad
Idiomas disponibles
Idiomas disponibles
8. SHALLOW WELL INSTALATION
Well Seal
Submerge
5-10 Feet
PEARL's CONVERT should not be installed where the total suction
lift exceeds 25 feet at sea level. The suction lift must be reduced
at the rate of approximately 1 foot per 1000 feet at elevation.
The total suction lift consists of the vertical distance from the
water level when pumping to the pump plus losses due to friction
in the pipeline. The volume of water delivered decreases with an
increased suction lift.
Drilled, bored, or dug wells may employ an arrangement as in
Figure 1. Driven wells and sand points employ the configuration
in Figure 2.
1. a) Install a foot valve on the bottom of the suction line and
place it 5 to 10 feet below the drawdown level, that is, the level of
the water when the unit is pumping at its rated capacity. It should
be far enough from the bottom of the well to avoid pumping sand
and mud (Figure 1).
b) On a driven well installation, install a check valve on the
vertical pipe at least five feet above the well point, or install a
horizontal check valve in the suction line near the pump (Figure
2).
2. Check the foot valve, and see that it seats properly and that no
obstruction prevents it from opening or closing. A leaky foot valve
may cause excessive cycling (motor starts and stops).
3. Lower first length of the suction pipe, with the attached foot
valve into the well, fill the pipe with clean water. If water recedes,
there might be a leak. If no leaks occur, assemble the remaining
section(s)of the pipe and check again for leaks.
Tee
Well Vent
Foot Valve
& Strainer
Figure 1
Horizontal
Check Valve
Well Point
Figure 2
4. Install the well seal at the top of the well casing and tighten the
well seal bolts. (Figure 1).
5. Install a tee at the top of the suction pipe, with a plug in the
top opening, and connect through a union to the female thread
in the pump body.
6. Connect pump discharge to the pressure tank, and pressure
tank to the house plumbing.
7. After the piping is completed and the motor is properly wired,
remove the priming plug on top of the pump and fill the pump
with clean water. Allow time for air in the system to escape, and
refill the pump, if necessary, before placing the priming plug
back. Start the motor and the unit should operate. If it does not, it
may be necessary to reprime.
8. When the unit has built up to maximum pressure and has
automatically stopped, check all piping, both suction and
discharge, lines for leaks, as they will be under pressure.
NOTE: If the unit is to be used with a vacuum-type air volume
control, where the source of supply is on the same level as the
pump or above it (artesian well, pond, cistern or shallow well with
less than five feet lift), a valve should be installed in the suction
line that may be partially closed to cause the pump to operate
under a moderate suction lift of 8-10 ft. to ensure the correct
operation of the air volume control which is operated by vacuum.
Tee
Vertical
Check Valve
Publicidad
