Grundfos Pump 45S100-25

DANGER — Electric shock. Death or serious personal injury.

Switch off the power supply before starting any work on the product.

Ensure the power supply cannot be accidentally switched on.

Measure the voltage between the phases using a voltmeter.

For single-phase motors, measure between phase and neutral or between two phases, depending on the type of supply.

Connect the voltmeter to the terminals in the motor-protective circuit breaker.

Is the voltage within the specified range when the motor is loaded?

Check storage temperature limits

Ensure motors are stored in a closed, dry, and well-ventilated room

Turn the shaft of MMS motors by hand at least once

Is the pump protected from direct sunlight?

Is the pump secured to prevent rolling or falling over?

SECTION: Checking the Motor Liquid

The motors are factory-filled with a special FDA-approved non-toxic liquid which is frost-proof down to -20 °C.

Check the level of motor liquid and refill if necessary using tap water.

SECTION: Grundfos MS6000 Motors

If the motor is delivered from stock, the liquid level must be checked before the motor is installed.

During service, the liquid level must be checked.

Filling procedure: the filling hole for motor liquid is placed at the top of the motor.

1. Position the submersible motor so the filling screw is at the highest point of the motor.

2. Remove the screw from the filling hole.

Motor Protection — Required Settings of Motor-Protective Circuit Breaker

Ensure the motor-protective circuit breaker is set to the rated maximum current of the motor.

Start the pump and let it run for half an hour at normal performance.

Slowly grade down the scale indicator until the motor trip point is reached.

Increase the setting by 5% after reaching the motor trip point.

Is the setting within the permissible range (not exceeding the rated maximum current of the motor)?

For motors wound for star-delta starting, ensure the motor-protective circuit breaker is set to rated maximum current × 0.58.

Is the startup time for star-delta starting or autotransformer starting within 2 seconds?

Enter the number of starts for MS and MMS motors in the past year

Has the pump been run at least once this year?

Check the maximum number of starts per hour and per day for each motor type