9
© 2020 FLINT & WALLING, INC. • 95 North Oak St. • Kendallville, IN 46755
flintandwalling.com
Installation (Continued)
5. Specific Wiring Procedure (Refer to Figures 9, 10, 11, 12,
13, 14 and Minimum Wire Size Chart).
a. Select the voltage you are to use, either 115V or 230V
single phase, 230V or 460V three phase.
b. The 1/3, 1/2 and 3/4 HP single phase pumps are factory
connected for 115V at the motor. The 1, 1
1
/
2
, 2 and 3 HP
pumps are factory connected for 230V at the motor. Three
phase models are factory connected for 230V at the motor.
c. If the motor wiring must be changed to conform to your spe-
cific voltage requirements then the motor, pressure switch
or other controls should be rewired to conform to one of the
wiring diagrams (either 115V or 230V, single phase; 230V
or 460V, three phase). Single phase 3 HP motors are 230V
only and cannot be wired for 115V service.
d. The motor wiring diagrams are Figures 9, 10, 11, 12, 13 &
14, and also are located on the motor label of the pump.
6. Remove the rear access cover of the motor.
7. Make the wiring change and replace the rear access cover.
Replace rear access cover before starting or
operating pump. Failure to do so can result
in personal injury.
IMPORTANT
: Do not use an extension cord or splice wires.
Joints should be made in an approved junction box. If the above
information or the following wiring diagrams are confusing,
consult a licensed electrician.
8. All units are not supplied with pressure switches, float
devices, on/off switches, or the like (control devices).
Controls should be wired in at this time, utilizing whatever
instructions come with the controls. All units supplied with
cords, will run whenever cord is plugged into power
and will turn off whenever cord is disconnected from power.
MOTOR PROTECTION
All single phase motors have built in thermal protection for all
voltages. The overload protects the motor against burnout
from overload of low voltage, high voltage and other causes.
The device is automatic and resets itself once the temperature
has dropped to a safe point. Frequent tripping of the device
indicates trouble in the motor or power lines and immediate
attention is needed.
Never examine, make wiring changes or
touch the motor before disconnecting the
main electrical supply switch. The thermal device may have
opened the electrical circuit.
Three phase motors do not have a built in thermal protection.
It is recommended that a properly sized magnetic or manual
starter (both with properly sized heaters) be used with all three
phase motors. Install starters following instructions of the starter
manufacturer. See Motor Rotation under Operation Section for
changing rotation on three phase motors.
All motors (single and three phase) should be equipped with a
correctly fused disconnect switch to provide protection. Consult
local or United States National Electric Codes for proper fuse
protection based on motor data chart (See Charts C, D and Wire
chart F).
Operation
Unit must be full of fluid before operating.
Do not run dry, or against a closed
discharge. Do not pump dirty water or abrasive liquids. To do so
will cause pump failure and will void the warranty.
VALVES
The inlet valve should be in the full open position and the
discharge valve should be partially open, permitting some back
pressure to be exerted against the pump when starting up.
Open valve after start up is completed.
PRIMING
NOTE:
Before starting the pump it is absolutely necessary that
both the pump and the inlet pipe be completely filled with
water.
Pressure Boost Installations
Priming is automatic when pump is connected to a pressure
source such as a hydrant or city main (See Figures 6, 7 & 8).
1. Open valves or nozzle on inlet and discharge side of pump.
2. To relieve trapped air, allow water supply to run a minimum
of 30 seconds before starting the pump.
IMPORTANT
: An adequate flow of water going into the pump is
required so that the pumps impellers and shaft seal do not run
dry and fail.
3. If you installed a pressure gauge at the pump inlet, a
reading of 2 psi minimum should show whenever the pump
is in operation (See Figures 6, 7 & 8).
This reading insures that there is an ample supply of water into
the pump inlet housing.
MOTOR/PUMP ROTATION
1. Single phase models are one (1) rotation only
(counterclockwise when facing the pump end) and cannot
be reversed.
2. Proper rotation of pump impeller is critical for three phase
pumps. Pump motor should turn counterclockwise (CCW)
when facing pump end. Momentarily “bump” (apply
power for less than a second) the motor to check for
proper rotation. To change rotation on three phase units,
interchange any two (2) incoming line (power) leads.
Do not go over recommended maximum
operating pressure (see Specifications),
while maintaining minimum flow of 1.5 GPM thru the pump. Do not
restrict the inlet line to the pump.
If driver (electric motor) is overloaded, a valve can be installed in
the discharge line to increase the back pressure and reduce driver
loading.
