Installation Requirements; Checking The Motor Liquid - Grundfos SP Series Installation And Operating Instructions Manual

5. Installation requirements

DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before starting any
work on the product.
- Make sure that the power supply cannot be
accidentally switched on.
WARNING
Crushing of feet
Death or serious personal injury
- When lifting the pump out of the box, use lifting
equipment which is approved for the weight of the
product.
- Wear personal protective equipment.
WARNING
Crushing of hands
Death or serious personal injury
- When lifting the pump out of the box, use lifting
equipment which is approved for the weight of the
product.
- Wear personal protective equipment.
The use of a sine-wave filter is mandatory when
operating an SPE pump set.
Grundfos recommends to fit a 30 cm long pipe to the
pump to facilitate handling of the pump during
installation.
Fig. 2 Handling of the motor

5.1 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 required.
Use tap water.
If frost protection is required, special Grundfos liquid
must be used to refill the motor. Otherwise tap water
may be used for refilling; however refill liquid as
described below.
5.1.1 Grundfos MS4000 and MS402 motors
The filling hole for motor liquid is placed in the following positions:
• MS4000: on the side of the motor near the top
• MS402: in the bottom of the motor.
1. Position the submersible pump as shown in fig. 3. The filling
screw must be at the highest point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe until the
liquid runs back out of the filling hole. See fig. 3.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the pump.
Torques
• MS4000: 3.0 Nm.
• MS402: 2.0 Nm.
The submersible pump is now ready for installation.
MS4000
Fig. 3 Motor position during filling - MS4000 and MS402
5.1.2 Grundfos MS6000 motors
• If the motor is delivered from stock, the liquid level must be
checked before the motor is installed. See fig. 4.
• In the case of service, the liquid level must be checked. See
fig. 4.
Filling procedure:
The filling hole for motor liquid is placed at the top of the motor.
1. Position the submersible motor as shown in fig. 4. The filling
screw must be at the highest point of the motor.
2. Remove the screw from the filling hole.
3. Inject liquid into the motor with the filling syringe (fig. 4) until
the liquid runs back out of the filling hole.
4. Replace the screw in the filling hole and tighten securely
before changing the position of the motor.
Torque: 3.0 Nm.
The submersible motor is now ready for installation.
Fig. 4 Motor position during filling - MS6000
MS402
45°
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