Franklin Electric SWJ Series Owner's Manual page 3

LOCATION OF PUMP
Decide on the area for the pump installation. Select a
pump location with adequate space for future pump
maintenance. It can be located in the basement or utility
room of your house, at the well or between the house
and the well. If installed outside of the house, it should be
protected by a pump house with auxiliary heat to prevent
possible freezing. The well also should be protected for
sanitary reasons. We recommend the ceiling be 3 to 4
feet from the floor.
PIPING THE WELL
Suction tapping on the pump is 1-1/4 inches (FNPT)
in size. Suction pipe diameter should never be smaller
than the suction tapping. A jet pump performs best when
installed close to the well because suction lift and friction
losses are kept to a minimum. The tank should also
be located as close to the pump as possible to avoid
excessive pressure and friction losses. Do not reduce the
sizes of pipe between the pump and the water source, as
it will result in considerable performance loss.
DETAILS AND FUNCTION OF PARTS
A jet pump is comprised of a centrifugal pump and an
injector. When the pump is filled with water and motor is
turned on, the impeller inside the pump case whirls the
water away from its center by centrifugal force, creating a
partial vacuum within the pump case. Water rushes into
this vacuum, causing a pumping action. Part of this water
flows at high speed through a restricted injector contained
in the pump case and water flowing through the injector
creates another partial vacuum which causes a pumping
action. These two pumping actions, centrifugal and jet, are
the reason for the jet pump's ability for creating water
pressure and volume for today's modern water systems.
INSTALLATION RECORDS
To keep an accurate record of your installation, be sure to
fill out the data below:
Date of installation: _____________________________
Model No: ____________________________________
Depth of well (ft): _______________________________
Depth of water (ft): _____________________________
Inside diameter of well: __________________________
Suction pipe size: ______________________________
Discharge pipe size: ____________________________
Motor: _______________________________________
hp: __________________________________________
Volts: ________________________________________
Power supply: _________________________________
Wire size: ____________________________________
Tank size: ____________________________________
Pressure switch setting: _________________________
PRESSURE SWITCHES
Switches are preset at the factory for proper performance
and do not usually require adjustment. If adjustment
is necessary, switch should be regulated according to
manufacturer's chart located in the switch.
MOTOR
A motor operating under normal conditions maintains
its rated performance indefinitely. This implies a clean,
dry motor with proper ventilation. A dirty motor or one
"protected" by a burlap or plastic bag, will overheat.
ELECTRICAL INSTALLATION
C A U T I O N
Improper wiring can result in permanent
damage to the motor. All electrical wiring should meet
the local electrical code.
115/230 V
HP
1/2
3/4
1
SHALLOW WELL INSTALLATION
Connect pump to well as shown in Figure 1. Support the
suction pipe so its weight is not carried by the pump.
Installation should include a foot valve in the well or a
check valve close to the pump. If the distance from the
well to the pump is more than 40 feet, a check valve
(installed close to the pump) is recommended in addition
to the foot valve. Special care should be taken to ensure
that all suction fittings are tight and sealed. Otherwise, the
pump cannot be primed.
HORIZONTAL OFFSET SUCTION PIPING
When the pipe is offset from the well, the horizontal offset
suction piping may have to be increased in diameter to
reduce friction loss. The table below shows recommended
pipe sizes, depending on the offset distance. Pipe from
the pump to the well should slope downward (about 4
inches to every 10 feet).
Thermal Protection
W
1 φ
1900
2210
3010
W