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CAUTION:
Do not operate the pump to check rotation until the pump is full of liquid or damage may occur even if the motor is
“bumped” to check motor rotation direction.
Check all electrical connections with the wiring diagram on the motor. Make sure the voltage, frequency, phase and amp draw comply
with the supply circuit.
If utilized, verify that power monitors or variable frequency drives have been properly installed according to the manufacturer’s
instructions
To verify correct rotation of the motor:
1. Install the pump into the system.
2. Fully open the suction and discharge valves.
3. Allow fluid to flow into the pump. Do not allow the pump to run dry (ceramic, PTFE and silicon carbide bushings can’t be run dry
without damage to pump components).
4. Jog the motor (allow it to run for 1-2 seconds) and observe the rotation of the motor fan. Refer to the directional arrow molded into
the pump casing if necessary.
NOTE: A pump running backwards will pump but at a greatly reduced flow and pressure.
Section III - 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 MSDB is not self-
priming.
2. Open the inlet (suction) and discharge valves completely and allow the pump to fill with liquid.
3. Close the discharge valve.
4. Turn the pump on. Slowly open the discharge valve. Adjust the flow rate and pressure by regulating the discharge valve. Do not
attempt to adjust the flow with the suction valve.
5. Use of a power monitor is strongly recommended for pumps with ceramic, PTFE or silicon carbide bushings. The power monitor will
stop the pump and help prevent damage if the pump should run dry. ATEX certified pumps MUST use a power monitor.
Shutdown
Use the following procedure to shut down the pump.
1. Slowly close the discharge valve.
2. Turn off the motor.
3. Close the suction valve.
Flush Systems
CAUTION:
Some fluids react with water; use compatible flushing fluid.
1. Turn off the pump.
2. Completely close the suction and discharge valves.
3. Connect flushing fluid supply to flush inlet valve.
4. Connect flushing fluid drain to flush drain valve.
5. Open flushing inlet and outlet valves. Flush system until the pump is clean.
Optional Drain Installation
1. Remove the impeller housing from the pump assembly.
2. Clamp the impeller housing to a drill press table.
3. Using a 7/16” drill and the molded boss as a guide, drill completely through the molded boss into the interior of the impeller
housing. De-burr the hole on the inside of the impeller housing.
CAUTION
- Do not tap too deep or the impeller housing may be damaged.
4. Using a 1/4” NPT tap, tap the hole in the molded boss to the appropriate depth.
5. Install the drain plug or valve, being careful not to overtighten.
