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The installation of the screen is shown in Figure 3.2 (Installation of Discharge Screen). 7 Figure 3.2 Installation of Discharge Screen 3.4 Pump Priming IMPORTANT: THE INLET PIPING AND PUMP MUST BE FILLED WITH LIQUID (i.e., PRIMED) BEFORE START-UP. If the pump is above the liquid source, fill the pump and supply line with liquid from an external source. WARNING: THE PUMP MUST BE SHUTOFF IMMEDIATELY IF PRIME IS LOST TO AVOID POSSIBLE DAMAGE TO THE INTERNALS OF THE LIQUID END. WARNING: NEVER RUN PUMP DRY. The liquid end of your Tonkaflo pump is lubricated by the process fluid. The pump must never be run dry to avoid damage to the liquid end. 3.5 Protection Against Running Dry It is suggested that controls to protect the pump from running dry be used. These controls include: pressure switches, flow switches, and temperature switches. 8 3.6 Motor Wiring 3.6.1 Single-Phase Motors When initially connecting to the power source, be certain that the motor voltage connections and available line voltage are the same. Connect electrical wires as shown on the motor wiring diagram located on the motor nameplate, electrical junction box, junction box cover, or wiring tag. Be sure your pump is electrically grounded at the junction box on the motor. 3.6.2 Three-Phase Motors The wiring diagram located on the motor nameplate, electrical junction box, junction box cover, or wiring tag should be used to correctly wire the motor according to the line voltage available. Be sure your pump is electrically grounded at the junction box on the motor. CAUTION: The 500X, 1000X and 1800X motor adapter pumps have a threaded motor shaft. Reverse operation can damage the motor shaft, pump shaft, or centrifugal stages. Before Starting Three-Phase Motors: STEPS 1. Prime pump before applying power to avoid damage to the pump. 2. Apply power for ONE SECOND MAXIMUM to check the direction of motor shaft rotation. The motor shaft should turn in a clockwise direction as viewed from the motor end. The direction of rotation for three- phase motors may be reversed by interchanging any two (2) leads (Figure 3.3, Changing Motor Rotation). Three-phase motors can run in either direction, depending on how they are connected to the power supply. When the three cable leads are first connected to the power supply, there is a 50% chance that the motor will run in the proper direction. To make sure the motor is running in the proper direction, carefully follow the procedure below. STEPS A. Start the pump and note the pressure and flow rate developed at the pump discharge. B. Stop the pump and interchange any of the two leads. C. Start the pump again and recheck the flow rate and pressure. 9 D. Compare the results observed. The wire connection that yielded the highest pressure and flow rate is the proper connection. Interchange the two leads only if necessary (Figure 3.3, Changing Motor Rotation). Figure 3.3 Changing Motor Rotation 3.6.3 Three-Phase Power Imbalance Current imbalance should not exceed 5% of the average three-phase current. The current imbalance can be calculated as follows: STEPS 1. Measure the current through each of the three legs. 2. Average the three current measurements together. 3. Determine the difference between the current in each leg and the average of all three legs. 4. Take the difference with the largest value, and divide it by the average current. Multiply by 100 to obtain the current imbalance percentage. 5. If the current imbalance is greater than 5%, “roll” the leads and retest (Figure 3.4, Rolling the Leads to Balance Current Rotation). If “rolling” the leads does not correct the problem, the source of imbalance must be located and corrected. For more information on current imbalance, refer to the motor operation manual. 10 Figure 3.4 “Rolling” the Leads to Balance Current Draw 11 4.0 GENERAL TROUBLESHOOTING FOR ALL PUMPS 4.1 Troubleshooting Chart LOW FLOW MOTOR RUNS HOT OR STOPS 1. Restrictions in inlet or discharge 2. Foot valve operating improperly 3. Air leak in inlet piping 4. Air leak in mechanical seal 5. Wrong installation of belt drive 6. Suction lift too high 7. Reverse rotation of pump shaft 8. Pump not primed adequately 9. Inlet strainer/filter plugged. 10. Pump throttling valve on discharge closed (pump deadheaded) 1. Motor surface temperature up to 104°F (40°C) over ambient can occur. The motor will feel hot to the touch. 2. Bad connection 3. Motor exceeded rated amp draw 4. Excessive ambient temperature 5. Heater size to small in motor heater 6. Binding rotation in the pump shaft 7. Bearings not adequately lubricated 8. Specific gravity or viscosity of liquid higher than design conditions 9. Motor wired improperly MOTOR DOES NOT RUN LOW PRESSURE 1. Blown fuse or tripped circuit breaker or 1. Pump not adequately primed overload heater 2. Air leak in inlet piping 2. Motor to hot - allow to cool 3. Excessive flow 3. Motor voltage connection and line 4. Clogged suction line filter or screen voltage different 5. Revers...

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