Start-Up and Shut-Off Procedure for Heated and Unheated Mag Drive Pumps
(This procedure does not replace the operation Instruction handbook.)
A. CHECKLIST BEFORE START-UP
- The nominal motor power must not exceed the pump's allowed maximum capacity (compare rating plates of motor and pump).
- Check direction of rotation with disconnected coupling.
- Check alignment of coupling.
- Check ease of pump operation by hand.
- Attach coupling protection.
- Connect thermocouples, dry run protection, pressure gauges, etc.
- Connect heater for heated pumps.
- Connect cooling system (if required).
- Attention: Insulation must not cover roller bearings.
B. START-UP
- Preheat heated pumps for a minimum of 2 hours.
- Open pressure valve.
- Open suction valve completely and fill pump.
- After 2-3 minutes close pressure valve.
- In case of external cooling, switch on coolant flow.
- Start motor.
- Subsequently open pressure valve slowly until pump reaches specified performance level.
C. SHUT-OFF
- Close pressure valve.
- Shut off motor. Allow pump to slow down smoothly.
- In case of external cooling, shut off coolant flow.
- Close suction valve.
NOTE:
- Throttling must not be done with the suction valve.
- Never shut off the pump with the suction valve.
- Pump must never run dry.
- Never run the pump against a closed pressure valve.
- The pump motor unit must run vibration free.
- Temperature of roller bearings must not exceed tolerated limit.