Installation (Continued)
5.Specific Wiring Procedure (Refer to Figures 9, 10, & 11 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, 11/2, 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 specific 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 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.
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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 con- fusing, 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 burn- out 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.
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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 protec- tion. 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 protec- tion. 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).
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CONNECTION FOR 3 PHASE, 9 LEADS. IF YOUR 3 PHASE LEADS ARE COLOR CODED, MATCH NUMBER ABOVE TO THE CORRESPONDING COLOR.
NOTE: To reverse rotation, interchange any two incoming lines (Power) leads.
Figure 11 - Wiring Diagram for Three Phase Motors
Operation
Unit must be full of fluid before operat- ing. 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 mini- mum 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 read- ing 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.
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FLINT & WALLING, INC. • 95 North Oak St. • Kendallville, IN 46755 • www.flintandwalling.com