Xylem e-XC, Instruction Manual

Page: 35 / 112

5 Commissioning, Startup,
Operation, and Shutdown
5.1 Preparation for startup
WARNING:
• Always disconnect and lock out power to the driver before you perform any installation
or maintenance tasks. Failure to disconnect and lock out driver power will result in
serious physical injury.
• Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local rules.
• Never operate a pump without a properly installed coupling guard. Personal injury will
occur if you run the pump without a coupling guard.
• Check the rotation of the power unit and pump in relation to that of the drive as shown
by the arrows on the case. Rotate the drive manually before you apply power-checking
rotation. Do not operate in the reverse direction of these arrows as serious damage or
injury can occur.
System flushing
Flush new and old systems in order to eliminate all foreign matter. Heavy scale, welding
splatter, and wire or other large foreign matter can clog the pump impeller. This reduces
the capacity of the pump which then causes cavitation, excessive vibration, and/or
damage to close clearance parts such as wear rings, seals, and sleeves.
Pre-operation inspections
Perform these inspections before you start the pump:
• Check the alignment between the pump and motor.
See Coupling alignment in the Installation chapter for alignment requirements.
• Check all connections to the motor and starting device against the wiring diagram.
• Check the voltage, phase, and frequency on the motor nameplate against the line
circuit.
• Check the suction and discharge piping and the pressure gauges for proper
operation.
• Check that you can turn the rotating element by hand in order to verify that it rotates
freely.
• Check the stuffing box adjustment, lubrication, and piping.
• Check the driver lubrication.
Refer to the driver Installation, Operation, and Maintenance manual.
• Check that the pump bearings are properly lubricated.
• Check that the coupling is properly lubricated, if required.
• Check that the pump is full of liquid and that all valves are properly set and
operational, with the discharge valve closed and the suction valve fully open. Purge all
air from the top of the casing.
• Check the direction of the rotation.
Be sure that the driver operates in the direction indicated by the arrow on the pump
casing. Serious damage can result if you operate the pump with the incorrect rotation.
Check the rotation each time you disconnect the motor leads.
5 Commissioning, Startup, Operation, and Shutdown
e-XC INSTRUCTION MANUAL 33