Finish Thompson UC - Manual (Page 10)

10
CAUTION: Do not run the pump dry. This could damage the pump. The fluid being transferred by the pump lubricates the
pump. Even short periods of running the pump dry could damage the pump. It is recommended that a run dry protection
device be used.
CAUTION: Do not dead head the pump. Running the pump at zero flow will cause any liquid inside the pump to elevate rapidly
in temperature. This will continue until the boiling point of the liquid is reached. The liquids will flash to vapor, causing the pump
to run dry, and destroy the pump. Run dry protection in the form of a power monitor is recommended.
WARNING: All ATEX compliant pumps must use a power monitor to protect against running dry, closed discharge valve, and
pump decoupling. Any of these conditions could lead to elevated surface temperatures.
CAUTION: Cavitation for an extended period of time can cause pitting and damage on the pump components. Make certain
NPSHa is greater than pump NPSHr.
CAUTION: Water hammer. Rapid changes in the fluid’s velocity can cause large, sudden pressure surges. These pressure
surges can damage the pump, plumbing and instrumentation. Common causes are rapidly closing valves. Check valves on the
suction can also cause water hammer if the liquid has time to reverse direction before the valve closes.
Motor/Electrical
Install the motor according to NEC requirements and local electrical codes. The motor should have overload protection. The use of
a power monitor is highly recommended.
Note: All ATEX certified pumps must use a power monitor.
1. The motor must be installed with flexible conduit in order to allow a minimum of 6” of motor movement so that the pump can
be disassembled.
2. Check all electrical connections with the wiring diagram on the motor. Insure that the voltage, frequency, and horsepower on
the motor comply with the line circuitry.
3. If utilized, check that the power monitor has been properly installed in accordance with the manufacturers directions.
CAUTION: Do not operate the pump to check rotation until the pump is full of liquid.
Pre-Operation Inspection
Prior to the first operation of the pump, perform the following inspections:
WARNING: Lock out power to the driver to prevent accidental motor start-up and physical injury.
1. Insert a screwdriver through the fan cover and rotate the fan. It should move without restrictions.
2. Verify that all flange and hold down bolts are tightened.
Operation
Start-up and Operation
1. This pump must be filled from a flooded suction tank (gravity) or primed with liquid from an outside source. The ULTRAChem
is not self-priming.
2. Ensure that the pump is full of liquid and the inlet (suction) valve is open.
3. Open the discharge valve completely and then close it so that there is no trapped air in the suction and discharge line.
4. After the pump is full of liquid, check that the rotation of the motor/ pump is in the correct direction. This can be achieved by
jogging the motor for approximately 1/2 second. The motor rotation can be observed from the fan end. Correct rotation when
viewed from the fan end is clockwise.
Note: A pump running backwards will pump but at a greatly reduced flow and pressure.
5. Turn the pump on. Slowly open the discharge valve. Check pump for proper flow and pressure, and that pump runs without
excessive noise or vibration.
6. Keep the suction valve in the fully open position. Never use the suction valve to regulate the flow rate. Use the discharge valve
only.
Note:
It is not necessary to jog the motor or adjust the valves on subsequent pump starts provided that the pump and piping
remain full of liquid.